feat: Add enterprise DBA features for production reliability
New features implemented: 1. Backup Catalog (internal/catalog/) - SQLite-based backup tracking - Gap detection and RPO monitoring - Search and statistics - Filesystem sync 2. DR Drill Testing (internal/drill/) - Automated restore testing in Docker containers - Database validation with custom queries - Catalog integration for drill-tested status 3. Smart Notifications (internal/notify/) - Event batching with configurable intervals - Time-based escalation policies - HTML/text/Slack templates 4. Compliance Reports (internal/report/) - SOC2, GDPR, HIPAA, PCI-DSS, ISO27001 frameworks - Evidence collection from catalog - JSON, Markdown, HTML output formats 5. RTO/RPO Calculator (internal/rto/) - Recovery objective analysis - RTO breakdown by phase - Recommendations for improvement 6. Replica-Aware Backup (internal/replica/) - Topology detection for PostgreSQL/MySQL - Automatic replica selection - Configurable selection strategies 7. Parallel Table Backup (internal/parallel/) - Concurrent table dumps - Worker pool with progress tracking - Large table optimization 8. MySQL/MariaDB PITR (internal/pitr/) - Binary log parsing and replay - Point-in-time recovery support - Transaction filtering CLI commands added: catalog, drill, report, rto All changes support the goal: reliable 3 AM database recovery.
This commit is contained in:
865
internal/pitr/binlog.go
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865
internal/pitr/binlog.go
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@@ -0,0 +1,865 @@
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// Package pitr provides Point-in-Time Recovery functionality
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// This file contains MySQL/MariaDB binary log handling
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package pitr
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import (
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"bufio"
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"compress/gzip"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"time"
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)
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// BinlogPosition represents a MySQL binary log position
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type BinlogPosition struct {
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File string `json:"file"` // Binary log filename (e.g., "mysql-bin.000042")
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Position uint64 `json:"position"` // Byte position in the file
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GTID string `json:"gtid,omitempty"` // GTID set (if available)
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ServerID uint32 `json:"server_id,omitempty"`
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}
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// String returns a string representation of the binlog position
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func (p *BinlogPosition) String() string {
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if p.GTID != "" {
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return fmt.Sprintf("%s:%d (GTID: %s)", p.File, p.Position, p.GTID)
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}
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return fmt.Sprintf("%s:%d", p.File, p.Position)
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}
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// IsZero returns true if the position is unset
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func (p *BinlogPosition) IsZero() bool {
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return p.File == "" && p.Position == 0 && p.GTID == ""
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}
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// Compare compares two binlog positions
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// Returns -1 if p < other, 0 if equal, 1 if p > other
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func (p *BinlogPosition) Compare(other LogPosition) int {
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o, ok := other.(*BinlogPosition)
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if !ok {
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return 0
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}
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// Compare by file first
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fileComp := compareBinlogFiles(p.File, o.File)
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if fileComp != 0 {
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return fileComp
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}
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// Then by position within file
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if p.Position < o.Position {
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return -1
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} else if p.Position > o.Position {
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return 1
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}
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return 0
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}
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// ParseBinlogPosition parses a binlog position string
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// Format: "filename:position" or "filename:position:gtid"
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func ParseBinlogPosition(s string) (*BinlogPosition, error) {
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parts := strings.SplitN(s, ":", 3)
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if len(parts) < 2 {
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return nil, fmt.Errorf("invalid binlog position format: %s (expected file:position)", s)
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}
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pos, err := strconv.ParseUint(parts[1], 10, 64)
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if err != nil {
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return nil, fmt.Errorf("invalid position value: %s", parts[1])
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}
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bp := &BinlogPosition{
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File: parts[0],
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Position: pos,
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}
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if len(parts) == 3 {
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bp.GTID = parts[2]
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}
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return bp, nil
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}
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// MarshalJSON serializes the binlog position to JSON
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func (p *BinlogPosition) MarshalJSON() ([]byte, error) {
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type Alias BinlogPosition
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return json.Marshal((*Alias)(p))
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}
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// compareBinlogFiles compares two binlog filenames numerically
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func compareBinlogFiles(a, b string) int {
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numA := extractBinlogNumber(a)
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numB := extractBinlogNumber(b)
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if numA < numB {
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return -1
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} else if numA > numB {
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return 1
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}
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return 0
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}
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// extractBinlogNumber extracts the numeric suffix from a binlog filename
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func extractBinlogNumber(filename string) int {
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// Match pattern like mysql-bin.000042
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re := regexp.MustCompile(`\.(\d+)$`)
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matches := re.FindStringSubmatch(filename)
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if len(matches) < 2 {
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return 0
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}
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num, _ := strconv.Atoi(matches[1])
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return num
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}
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// BinlogFile represents a binary log file with metadata
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type BinlogFile struct {
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Name string `json:"name"`
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Path string `json:"path"`
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Size int64 `json:"size"`
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ModTime time.Time `json:"mod_time"`
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StartTime time.Time `json:"start_time,omitempty"` // First event timestamp
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EndTime time.Time `json:"end_time,omitempty"` // Last event timestamp
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StartPos uint64 `json:"start_pos"`
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EndPos uint64 `json:"end_pos"`
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GTID string `json:"gtid,omitempty"`
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ServerID uint32 `json:"server_id,omitempty"`
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Format string `json:"format,omitempty"` // ROW, STATEMENT, MIXED
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Archived bool `json:"archived"`
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ArchiveDir string `json:"archive_dir,omitempty"`
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}
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// BinlogArchiveInfo contains metadata about an archived binlog
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type BinlogArchiveInfo struct {
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OriginalFile string `json:"original_file"`
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ArchivePath string `json:"archive_path"`
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Size int64 `json:"size"`
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Compressed bool `json:"compressed"`
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Encrypted bool `json:"encrypted"`
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Checksum string `json:"checksum"`
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ArchivedAt time.Time `json:"archived_at"`
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StartPos uint64 `json:"start_pos"`
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EndPos uint64 `json:"end_pos"`
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StartTime time.Time `json:"start_time"`
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EndTime time.Time `json:"end_time"`
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GTID string `json:"gtid,omitempty"`
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}
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// BinlogManager handles binary log operations
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type BinlogManager struct {
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mysqlbinlogPath string
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binlogDir string
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archiveDir string
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compression bool
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encryption bool
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encryptionKey []byte
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serverType DatabaseType // mysql or mariadb
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}
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// BinlogManagerConfig holds configuration for BinlogManager
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type BinlogManagerConfig struct {
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BinlogDir string
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ArchiveDir string
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Compression bool
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Encryption bool
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EncryptionKey []byte
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}
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// NewBinlogManager creates a new BinlogManager
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func NewBinlogManager(config BinlogManagerConfig) (*BinlogManager, error) {
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m := &BinlogManager{
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binlogDir: config.BinlogDir,
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archiveDir: config.ArchiveDir,
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compression: config.Compression,
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encryption: config.Encryption,
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encryptionKey: config.EncryptionKey,
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}
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// Find mysqlbinlog executable
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if err := m.detectTools(); err != nil {
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return nil, err
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}
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return m, nil
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}
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// detectTools finds MySQL/MariaDB tools and determines server type
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func (m *BinlogManager) detectTools() error {
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// Try mariadb-binlog first (MariaDB)
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if path, err := exec.LookPath("mariadb-binlog"); err == nil {
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m.mysqlbinlogPath = path
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m.serverType = DatabaseMariaDB
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return nil
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}
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// Fall back to mysqlbinlog (MySQL or older MariaDB)
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if path, err := exec.LookPath("mysqlbinlog"); err == nil {
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m.mysqlbinlogPath = path
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// Check if it's actually MariaDB's version
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m.serverType = m.detectServerType()
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return nil
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}
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return fmt.Errorf("mysqlbinlog or mariadb-binlog not found in PATH")
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}
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// detectServerType determines if we're working with MySQL or MariaDB
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func (m *BinlogManager) detectServerType() DatabaseType {
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cmd := exec.Command(m.mysqlbinlogPath, "--version")
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output, err := cmd.Output()
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if err != nil {
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return DatabaseMySQL // Default to MySQL
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}
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if strings.Contains(strings.ToLower(string(output)), "mariadb") {
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return DatabaseMariaDB
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}
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return DatabaseMySQL
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}
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// ServerType returns the detected server type
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func (m *BinlogManager) ServerType() DatabaseType {
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return m.serverType
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}
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// DiscoverBinlogs finds all binary log files in the configured directory
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func (m *BinlogManager) DiscoverBinlogs(ctx context.Context) ([]BinlogFile, error) {
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if m.binlogDir == "" {
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return nil, fmt.Errorf("binlog directory not configured")
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}
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entries, err := os.ReadDir(m.binlogDir)
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if err != nil {
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return nil, fmt.Errorf("reading binlog directory: %w", err)
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}
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var binlogs []BinlogFile
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binlogPattern := regexp.MustCompile(`^[a-zA-Z0-9_-]+-bin\.\d{6}$`)
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for _, entry := range entries {
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if entry.IsDir() {
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continue
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}
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// Check if it matches binlog naming convention
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if !binlogPattern.MatchString(entry.Name()) {
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continue
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}
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info, err := entry.Info()
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if err != nil {
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continue
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}
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binlog := BinlogFile{
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Name: entry.Name(),
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Path: filepath.Join(m.binlogDir, entry.Name()),
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Size: info.Size(),
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ModTime: info.ModTime(),
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}
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// Get binlog metadata using mysqlbinlog
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if err := m.enrichBinlogMetadata(ctx, &binlog); err != nil {
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// Log but don't fail - we can still use basic info
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binlog.StartPos = 4 // Magic number size
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}
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binlogs = append(binlogs, binlog)
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}
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// Sort by file number
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sort.Slice(binlogs, func(i, j int) bool {
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return compareBinlogFiles(binlogs[i].Name, binlogs[j].Name) < 0
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})
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return binlogs, nil
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}
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// enrichBinlogMetadata extracts metadata from a binlog file
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func (m *BinlogManager) enrichBinlogMetadata(ctx context.Context, binlog *BinlogFile) error {
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// Use mysqlbinlog to read header and extract timestamps
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cmd := exec.CommandContext(ctx, m.mysqlbinlogPath,
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"--no-defaults",
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"--start-position=4",
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"--stop-position=1000", // Just read header area
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binlog.Path,
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)
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output, err := cmd.Output()
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if err != nil {
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// Try without position limits
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cmd = exec.CommandContext(ctx, m.mysqlbinlogPath,
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"--no-defaults",
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"-v", // Verbose mode for more info
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binlog.Path,
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)
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output, _ = cmd.Output()
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}
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// Parse output for metadata
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m.parseBinlogOutput(string(output), binlog)
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// Get file size for end position
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if binlog.EndPos == 0 {
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binlog.EndPos = uint64(binlog.Size)
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}
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return nil
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}
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// parseBinlogOutput parses mysqlbinlog output to extract metadata
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func (m *BinlogManager) parseBinlogOutput(output string, binlog *BinlogFile) {
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lines := strings.Split(output, "\n")
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// Pattern for timestamp: #YYMMDD HH:MM:SS
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timestampRe := regexp.MustCompile(`#(\d{6})\s+(\d{1,2}:\d{2}:\d{2})`)
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// Pattern for server_id
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serverIDRe := regexp.MustCompile(`server id\s+(\d+)`)
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// Pattern for end_log_pos
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endPosRe := regexp.MustCompile(`end_log_pos\s+(\d+)`)
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// Pattern for binlog format
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formatRe := regexp.MustCompile(`binlog_format=(\w+)`)
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// Pattern for GTID
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gtidRe := regexp.MustCompile(`SET @@SESSION.GTID_NEXT=\s*'([^']+)'`)
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mariaGtidRe := regexp.MustCompile(`GTID\s+(\d+-\d+-\d+)`)
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var firstTimestamp, lastTimestamp time.Time
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var maxEndPos uint64
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for _, line := range lines {
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// Extract timestamps
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if matches := timestampRe.FindStringSubmatch(line); len(matches) == 3 {
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// Parse YYMMDD format
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dateStr := matches[1]
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timeStr := matches[2]
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if t, err := time.Parse("060102 15:04:05", dateStr+" "+timeStr); err == nil {
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if firstTimestamp.IsZero() {
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firstTimestamp = t
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}
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lastTimestamp = t
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}
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}
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// Extract server_id
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if matches := serverIDRe.FindStringSubmatch(line); len(matches) == 2 {
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if id, err := strconv.ParseUint(matches[1], 10, 32); err == nil {
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binlog.ServerID = uint32(id)
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}
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}
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// Extract end_log_pos (track max for EndPos)
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if matches := endPosRe.FindStringSubmatch(line); len(matches) == 2 {
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if pos, err := strconv.ParseUint(matches[1], 10, 64); err == nil {
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if pos > maxEndPos {
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maxEndPos = pos
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}
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}
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}
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// Extract format
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if matches := formatRe.FindStringSubmatch(line); len(matches) == 2 {
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binlog.Format = matches[1]
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}
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// Extract GTID (MySQL format)
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if matches := gtidRe.FindStringSubmatch(line); len(matches) == 2 {
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binlog.GTID = matches[1]
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}
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// Extract GTID (MariaDB format)
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if matches := mariaGtidRe.FindStringSubmatch(line); len(matches) == 2 {
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binlog.GTID = matches[1]
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}
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}
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if !firstTimestamp.IsZero() {
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binlog.StartTime = firstTimestamp
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}
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if !lastTimestamp.IsZero() {
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binlog.EndTime = lastTimestamp
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}
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if maxEndPos > 0 {
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binlog.EndPos = maxEndPos
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}
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}
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// GetCurrentPosition retrieves the current binary log position from MySQL
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func (m *BinlogManager) GetCurrentPosition(ctx context.Context, dsn string) (*BinlogPosition, error) {
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// This would typically connect to MySQL and run SHOW MASTER STATUS
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// For now, return an error indicating it needs to be called with a connection
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return nil, fmt.Errorf("GetCurrentPosition requires a database connection - use MySQLPITR.GetCurrentPosition instead")
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}
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// ArchiveBinlog archives a single binlog file to the archive directory
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func (m *BinlogManager) ArchiveBinlog(ctx context.Context, binlog *BinlogFile) (*BinlogArchiveInfo, error) {
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if m.archiveDir == "" {
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return nil, fmt.Errorf("archive directory not configured")
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}
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|
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// Ensure archive directory exists
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if err := os.MkdirAll(m.archiveDir, 0750); err != nil {
|
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return nil, fmt.Errorf("creating archive directory: %w", err)
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}
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archiveName := binlog.Name
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if m.compression {
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archiveName += ".gz"
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}
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archivePath := filepath.Join(m.archiveDir, archiveName)
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|
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// Check if already archived
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if _, err := os.Stat(archivePath); err == nil {
|
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return nil, fmt.Errorf("binlog already archived: %s", archivePath)
|
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}
|
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|
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// Open source file
|
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src, err := os.Open(binlog.Path)
|
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if err != nil {
|
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return nil, fmt.Errorf("opening binlog: %w", err)
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}
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defer src.Close()
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// Create destination file
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dst, err := os.OpenFile(archivePath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0640)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("creating archive file: %w", err)
|
||||
}
|
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defer dst.Close()
|
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var writer io.Writer = dst
|
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var gzWriter *gzip.Writer
|
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|
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if m.compression {
|
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gzWriter = gzip.NewWriter(dst)
|
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writer = gzWriter
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defer gzWriter.Close()
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}
|
||||
|
||||
// TODO: Add encryption layer if enabled
|
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if m.encryption && len(m.encryptionKey) > 0 {
|
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// Encryption would be added here
|
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}
|
||||
|
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// Copy file content
|
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written, err := io.Copy(writer, src)
|
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if err != nil {
|
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os.Remove(archivePath) // Cleanup on error
|
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return nil, fmt.Errorf("copying binlog: %w", err)
|
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}
|
||||
|
||||
// Close gzip writer to flush
|
||||
if gzWriter != nil {
|
||||
if err := gzWriter.Close(); err != nil {
|
||||
os.Remove(archivePath)
|
||||
return nil, fmt.Errorf("closing gzip writer: %w", err)
|
||||
}
|
||||
}
|
||||
|
||||
// Get final archive size
|
||||
archiveInfo, err := os.Stat(archivePath)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("getting archive info: %w", err)
|
||||
}
|
||||
|
||||
// Calculate checksum (simple for now - could use SHA256)
|
||||
checksum := fmt.Sprintf("size:%d", written)
|
||||
|
||||
return &BinlogArchiveInfo{
|
||||
OriginalFile: binlog.Name,
|
||||
ArchivePath: archivePath,
|
||||
Size: archiveInfo.Size(),
|
||||
Compressed: m.compression,
|
||||
Encrypted: m.encryption,
|
||||
Checksum: checksum,
|
||||
ArchivedAt: time.Now(),
|
||||
StartPos: binlog.StartPos,
|
||||
EndPos: binlog.EndPos,
|
||||
StartTime: binlog.StartTime,
|
||||
EndTime: binlog.EndTime,
|
||||
GTID: binlog.GTID,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// ListArchivedBinlogs returns all archived binlog files
|
||||
func (m *BinlogManager) ListArchivedBinlogs(ctx context.Context) ([]BinlogArchiveInfo, error) {
|
||||
if m.archiveDir == "" {
|
||||
return nil, fmt.Errorf("archive directory not configured")
|
||||
}
|
||||
|
||||
entries, err := os.ReadDir(m.archiveDir)
|
||||
if err != nil {
|
||||
if os.IsNotExist(err) {
|
||||
return []BinlogArchiveInfo{}, nil
|
||||
}
|
||||
return nil, fmt.Errorf("reading archive directory: %w", err)
|
||||
}
|
||||
|
||||
var archives []BinlogArchiveInfo
|
||||
metadataPath := filepath.Join(m.archiveDir, "metadata.json")
|
||||
|
||||
// Try to load metadata file for enriched info
|
||||
metadata := m.loadArchiveMetadata(metadataPath)
|
||||
|
||||
for _, entry := range entries {
|
||||
if entry.IsDir() || entry.Name() == "metadata.json" {
|
||||
continue
|
||||
}
|
||||
|
||||
info, err := entry.Info()
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
originalName := entry.Name()
|
||||
compressed := false
|
||||
if strings.HasSuffix(originalName, ".gz") {
|
||||
originalName = strings.TrimSuffix(originalName, ".gz")
|
||||
compressed = true
|
||||
}
|
||||
|
||||
archive := BinlogArchiveInfo{
|
||||
OriginalFile: originalName,
|
||||
ArchivePath: filepath.Join(m.archiveDir, entry.Name()),
|
||||
Size: info.Size(),
|
||||
Compressed: compressed,
|
||||
ArchivedAt: info.ModTime(),
|
||||
}
|
||||
|
||||
// Enrich from metadata if available
|
||||
if meta, ok := metadata[originalName]; ok {
|
||||
archive.StartPos = meta.StartPos
|
||||
archive.EndPos = meta.EndPos
|
||||
archive.StartTime = meta.StartTime
|
||||
archive.EndTime = meta.EndTime
|
||||
archive.GTID = meta.GTID
|
||||
archive.Checksum = meta.Checksum
|
||||
}
|
||||
|
||||
archives = append(archives, archive)
|
||||
}
|
||||
|
||||
// Sort by file number
|
||||
sort.Slice(archives, func(i, j int) bool {
|
||||
return compareBinlogFiles(archives[i].OriginalFile, archives[j].OriginalFile) < 0
|
||||
})
|
||||
|
||||
return archives, nil
|
||||
}
|
||||
|
||||
// loadArchiveMetadata loads the metadata.json file if it exists
|
||||
func (m *BinlogManager) loadArchiveMetadata(path string) map[string]BinlogArchiveInfo {
|
||||
result := make(map[string]BinlogArchiveInfo)
|
||||
|
||||
data, err := os.ReadFile(path)
|
||||
if err != nil {
|
||||
return result
|
||||
}
|
||||
|
||||
var archives []BinlogArchiveInfo
|
||||
if err := json.Unmarshal(data, &archives); err != nil {
|
||||
return result
|
||||
}
|
||||
|
||||
for _, a := range archives {
|
||||
result[a.OriginalFile] = a
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
// SaveArchiveMetadata saves metadata for all archived binlogs
|
||||
func (m *BinlogManager) SaveArchiveMetadata(archives []BinlogArchiveInfo) error {
|
||||
if m.archiveDir == "" {
|
||||
return fmt.Errorf("archive directory not configured")
|
||||
}
|
||||
|
||||
metadataPath := filepath.Join(m.archiveDir, "metadata.json")
|
||||
data, err := json.MarshalIndent(archives, "", " ")
|
||||
if err != nil {
|
||||
return fmt.Errorf("marshaling metadata: %w", err)
|
||||
}
|
||||
|
||||
return os.WriteFile(metadataPath, data, 0640)
|
||||
}
|
||||
|
||||
// ValidateBinlogChain validates the integrity of the binlog chain
|
||||
func (m *BinlogManager) ValidateBinlogChain(ctx context.Context, binlogs []BinlogFile) (*ChainValidation, error) {
|
||||
result := &ChainValidation{
|
||||
Valid: true,
|
||||
LogCount: len(binlogs),
|
||||
}
|
||||
|
||||
if len(binlogs) == 0 {
|
||||
result.Warnings = append(result.Warnings, "no binlog files found")
|
||||
return result, nil
|
||||
}
|
||||
|
||||
// Sort binlogs by file number
|
||||
sorted := make([]BinlogFile, len(binlogs))
|
||||
copy(sorted, binlogs)
|
||||
sort.Slice(sorted, func(i, j int) bool {
|
||||
return compareBinlogFiles(sorted[i].Name, sorted[j].Name) < 0
|
||||
})
|
||||
|
||||
result.StartPos = &BinlogPosition{
|
||||
File: sorted[0].Name,
|
||||
Position: sorted[0].StartPos,
|
||||
GTID: sorted[0].GTID,
|
||||
}
|
||||
result.EndPos = &BinlogPosition{
|
||||
File: sorted[len(sorted)-1].Name,
|
||||
Position: sorted[len(sorted)-1].EndPos,
|
||||
GTID: sorted[len(sorted)-1].GTID,
|
||||
}
|
||||
|
||||
// Check for gaps in sequence
|
||||
var prevNum int
|
||||
var prevName string
|
||||
var prevServerID uint32
|
||||
|
||||
for i, binlog := range sorted {
|
||||
result.TotalSize += binlog.Size
|
||||
|
||||
num := extractBinlogNumber(binlog.Name)
|
||||
|
||||
if i > 0 {
|
||||
// Check sequence continuity
|
||||
if num != prevNum+1 {
|
||||
gap := LogGap{
|
||||
After: prevName,
|
||||
Before: binlog.Name,
|
||||
Reason: fmt.Sprintf("missing binlog file(s) %d to %d", prevNum+1, num-1),
|
||||
}
|
||||
result.Gaps = append(result.Gaps, gap)
|
||||
result.Valid = false
|
||||
}
|
||||
|
||||
// Check server_id consistency
|
||||
if binlog.ServerID != 0 && prevServerID != 0 && binlog.ServerID != prevServerID {
|
||||
result.Warnings = append(result.Warnings,
|
||||
fmt.Sprintf("server_id changed from %d to %d at %s (possible master failover)",
|
||||
prevServerID, binlog.ServerID, binlog.Name))
|
||||
}
|
||||
}
|
||||
|
||||
prevNum = num
|
||||
prevName = binlog.Name
|
||||
if binlog.ServerID != 0 {
|
||||
prevServerID = binlog.ServerID
|
||||
}
|
||||
}
|
||||
|
||||
if len(result.Gaps) > 0 {
|
||||
result.Errors = append(result.Errors,
|
||||
fmt.Sprintf("found %d gap(s) in binlog chain", len(result.Gaps)))
|
||||
}
|
||||
|
||||
return result, nil
|
||||
}
|
||||
|
||||
// ReplayBinlogs replays binlog events to a target time or position
|
||||
func (m *BinlogManager) ReplayBinlogs(ctx context.Context, opts ReplayOptions) error {
|
||||
if len(opts.BinlogFiles) == 0 {
|
||||
return fmt.Errorf("no binlog files specified")
|
||||
}
|
||||
|
||||
// Build mysqlbinlog command
|
||||
args := []string{"--no-defaults"}
|
||||
|
||||
// Add start position if specified
|
||||
if opts.StartPosition != nil && !opts.StartPosition.IsZero() {
|
||||
startPos, ok := opts.StartPosition.(*BinlogPosition)
|
||||
if ok && startPos.Position > 0 {
|
||||
args = append(args, fmt.Sprintf("--start-position=%d", startPos.Position))
|
||||
}
|
||||
}
|
||||
|
||||
// Add stop time or position
|
||||
if opts.StopTime != nil && !opts.StopTime.IsZero() {
|
||||
args = append(args, fmt.Sprintf("--stop-datetime=%s", opts.StopTime.Format("2006-01-02 15:04:05")))
|
||||
}
|
||||
|
||||
if opts.StopPosition != nil && !opts.StopPosition.IsZero() {
|
||||
stopPos, ok := opts.StopPosition.(*BinlogPosition)
|
||||
if ok && stopPos.Position > 0 {
|
||||
args = append(args, fmt.Sprintf("--stop-position=%d", stopPos.Position))
|
||||
}
|
||||
}
|
||||
|
||||
// Add binlog files
|
||||
args = append(args, opts.BinlogFiles...)
|
||||
|
||||
if opts.DryRun {
|
||||
// Just decode and show SQL
|
||||
args = append([]string{args[0]}, append([]string{"-v"}, args[1:]...)...)
|
||||
cmd := exec.CommandContext(ctx, m.mysqlbinlogPath, args...)
|
||||
output, err := cmd.Output()
|
||||
if err != nil {
|
||||
return fmt.Errorf("parsing binlogs: %w", err)
|
||||
}
|
||||
if opts.Output != nil {
|
||||
opts.Output.Write(output)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Pipe to mysql for replay
|
||||
mysqlCmd := exec.CommandContext(ctx, "mysql",
|
||||
"-u", opts.MySQLUser,
|
||||
"-p"+opts.MySQLPass,
|
||||
"-h", opts.MySQLHost,
|
||||
"-P", strconv.Itoa(opts.MySQLPort),
|
||||
)
|
||||
|
||||
binlogCmd := exec.CommandContext(ctx, m.mysqlbinlogPath, args...)
|
||||
|
||||
// Pipe mysqlbinlog output to mysql
|
||||
pipe, err := binlogCmd.StdoutPipe()
|
||||
if err != nil {
|
||||
return fmt.Errorf("creating pipe: %w", err)
|
||||
}
|
||||
mysqlCmd.Stdin = pipe
|
||||
|
||||
// Capture stderr for error reporting
|
||||
var binlogStderr, mysqlStderr strings.Builder
|
||||
binlogCmd.Stderr = &binlogStderr
|
||||
mysqlCmd.Stderr = &mysqlStderr
|
||||
|
||||
// Start commands
|
||||
if err := binlogCmd.Start(); err != nil {
|
||||
return fmt.Errorf("starting mysqlbinlog: %w", err)
|
||||
}
|
||||
if err := mysqlCmd.Start(); err != nil {
|
||||
binlogCmd.Process.Kill()
|
||||
return fmt.Errorf("starting mysql: %w", err)
|
||||
}
|
||||
|
||||
// Wait for completion
|
||||
binlogErr := binlogCmd.Wait()
|
||||
mysqlErr := mysqlCmd.Wait()
|
||||
|
||||
if binlogErr != nil {
|
||||
return fmt.Errorf("mysqlbinlog failed: %w\nstderr: %s", binlogErr, binlogStderr.String())
|
||||
}
|
||||
if mysqlErr != nil {
|
||||
return fmt.Errorf("mysql replay failed: %w\nstderr: %s", mysqlErr, mysqlStderr.String())
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// ReplayOptions holds options for replaying binlog files
|
||||
type ReplayOptions struct {
|
||||
BinlogFiles []string // Files to replay (in order)
|
||||
StartPosition LogPosition // Start from this position
|
||||
StopTime *time.Time // Stop at this time
|
||||
StopPosition LogPosition // Stop at this position
|
||||
DryRun bool // Just show what would be done
|
||||
Output io.Writer // For dry-run output
|
||||
MySQLHost string // MySQL host for replay
|
||||
MySQLPort int // MySQL port
|
||||
MySQLUser string // MySQL user
|
||||
MySQLPass string // MySQL password
|
||||
Database string // Limit to specific database
|
||||
StopOnError bool // Stop on first error
|
||||
}
|
||||
|
||||
// FindBinlogsInRange finds binlog files containing events within a time range
|
||||
func (m *BinlogManager) FindBinlogsInRange(ctx context.Context, binlogs []BinlogFile, start, end time.Time) []BinlogFile {
|
||||
var result []BinlogFile
|
||||
|
||||
for _, b := range binlogs {
|
||||
// Include if binlog time range overlaps with requested range
|
||||
if b.EndTime.IsZero() && b.StartTime.IsZero() {
|
||||
// No timestamp info, include to be safe
|
||||
result = append(result, b)
|
||||
continue
|
||||
}
|
||||
|
||||
// Check for overlap
|
||||
binlogStart := b.StartTime
|
||||
binlogEnd := b.EndTime
|
||||
if binlogEnd.IsZero() {
|
||||
binlogEnd = time.Now() // Assume current file goes to now
|
||||
}
|
||||
|
||||
if !binlogStart.After(end) && !binlogEnd.Before(start) {
|
||||
result = append(result, b)
|
||||
}
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
// WatchBinlogs monitors for new binlog files and archives them
|
||||
func (m *BinlogManager) WatchBinlogs(ctx context.Context, interval time.Duration, callback func(*BinlogFile)) error {
|
||||
if m.binlogDir == "" {
|
||||
return fmt.Errorf("binlog directory not configured")
|
||||
}
|
||||
|
||||
// Get initial list
|
||||
known := make(map[string]struct{})
|
||||
binlogs, err := m.DiscoverBinlogs(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
for _, b := range binlogs {
|
||||
known[b.Name] = struct{}{}
|
||||
}
|
||||
|
||||
ticker := time.NewTicker(interval)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
return ctx.Err()
|
||||
case <-ticker.C:
|
||||
binlogs, err := m.DiscoverBinlogs(ctx)
|
||||
if err != nil {
|
||||
continue // Log error but keep watching
|
||||
}
|
||||
|
||||
for _, b := range binlogs {
|
||||
if _, exists := known[b.Name]; !exists {
|
||||
// New binlog found
|
||||
known[b.Name] = struct{}{}
|
||||
if callback != nil {
|
||||
callback(&b)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ParseBinlogIndex reads the binlog index file
|
||||
func (m *BinlogManager) ParseBinlogIndex(indexPath string) ([]string, error) {
|
||||
file, err := os.Open(indexPath)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("opening index file: %w", err)
|
||||
}
|
||||
defer file.Close()
|
||||
|
||||
var binlogs []string
|
||||
scanner := bufio.NewScanner(file)
|
||||
for scanner.Scan() {
|
||||
line := strings.TrimSpace(scanner.Text())
|
||||
if line != "" {
|
||||
binlogs = append(binlogs, line)
|
||||
}
|
||||
}
|
||||
|
||||
if err := scanner.Err(); err != nil {
|
||||
return nil, fmt.Errorf("reading index file: %w", err)
|
||||
}
|
||||
|
||||
return binlogs, nil
|
||||
}
|
||||
585
internal/pitr/binlog_test.go
Normal file
585
internal/pitr/binlog_test.go
Normal file
@@ -0,0 +1,585 @@
|
||||
package pitr
|
||||
|
||||
import (
|
||||
"context"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
func TestBinlogPosition_String(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
position BinlogPosition
|
||||
expected string
|
||||
}{
|
||||
{
|
||||
name: "basic position",
|
||||
position: BinlogPosition{
|
||||
File: "mysql-bin.000042",
|
||||
Position: 1234,
|
||||
},
|
||||
expected: "mysql-bin.000042:1234",
|
||||
},
|
||||
{
|
||||
name: "with GTID",
|
||||
position: BinlogPosition{
|
||||
File: "mysql-bin.000042",
|
||||
Position: 1234,
|
||||
GTID: "3E11FA47-71CA-11E1-9E33-C80AA9429562:1-5",
|
||||
},
|
||||
expected: "mysql-bin.000042:1234 (GTID: 3E11FA47-71CA-11E1-9E33-C80AA9429562:1-5)",
|
||||
},
|
||||
{
|
||||
name: "MariaDB GTID",
|
||||
position: BinlogPosition{
|
||||
File: "mariadb-bin.000010",
|
||||
Position: 500,
|
||||
GTID: "0-1-100",
|
||||
},
|
||||
expected: "mariadb-bin.000010:500 (GTID: 0-1-100)",
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result := tt.position.String()
|
||||
if result != tt.expected {
|
||||
t.Errorf("got %q, want %q", result, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestBinlogPosition_IsZero(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
position BinlogPosition
|
||||
expected bool
|
||||
}{
|
||||
{
|
||||
name: "empty position",
|
||||
position: BinlogPosition{},
|
||||
expected: true,
|
||||
},
|
||||
{
|
||||
name: "has file",
|
||||
position: BinlogPosition{
|
||||
File: "mysql-bin.000001",
|
||||
},
|
||||
expected: false,
|
||||
},
|
||||
{
|
||||
name: "has position only",
|
||||
position: BinlogPosition{
|
||||
Position: 100,
|
||||
},
|
||||
expected: false,
|
||||
},
|
||||
{
|
||||
name: "has GTID only",
|
||||
position: BinlogPosition{
|
||||
GTID: "3E11FA47-71CA-11E1-9E33-C80AA9429562:1",
|
||||
},
|
||||
expected: false,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result := tt.position.IsZero()
|
||||
if result != tt.expected {
|
||||
t.Errorf("got %v, want %v", result, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestBinlogPosition_Compare(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
a *BinlogPosition
|
||||
b *BinlogPosition
|
||||
expected int
|
||||
}{
|
||||
{
|
||||
name: "equal positions",
|
||||
a: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 1000,
|
||||
},
|
||||
b: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 1000,
|
||||
},
|
||||
expected: 0,
|
||||
},
|
||||
{
|
||||
name: "a before b - same file",
|
||||
a: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 100,
|
||||
},
|
||||
b: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 200,
|
||||
},
|
||||
expected: -1,
|
||||
},
|
||||
{
|
||||
name: "a after b - same file",
|
||||
a: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 300,
|
||||
},
|
||||
b: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 200,
|
||||
},
|
||||
expected: 1,
|
||||
},
|
||||
{
|
||||
name: "a before b - different files",
|
||||
a: &BinlogPosition{
|
||||
File: "mysql-bin.000009",
|
||||
Position: 9999,
|
||||
},
|
||||
b: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 100,
|
||||
},
|
||||
expected: -1,
|
||||
},
|
||||
{
|
||||
name: "a after b - different files",
|
||||
a: &BinlogPosition{
|
||||
File: "mysql-bin.000011",
|
||||
Position: 100,
|
||||
},
|
||||
b: &BinlogPosition{
|
||||
File: "mysql-bin.000010",
|
||||
Position: 9999,
|
||||
},
|
||||
expected: 1,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result := tt.a.Compare(tt.b)
|
||||
if result != tt.expected {
|
||||
t.Errorf("got %d, want %d", result, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestParseBinlogPosition(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
input string
|
||||
expected *BinlogPosition
|
||||
expectError bool
|
||||
}{
|
||||
{
|
||||
name: "basic position",
|
||||
input: "mysql-bin.000042:1234",
|
||||
expected: &BinlogPosition{
|
||||
File: "mysql-bin.000042",
|
||||
Position: 1234,
|
||||
},
|
||||
expectError: false,
|
||||
},
|
||||
{
|
||||
name: "with GTID",
|
||||
input: "mysql-bin.000042:1234:3E11FA47-71CA-11E1-9E33-C80AA9429562:1-5",
|
||||
expected: &BinlogPosition{
|
||||
File: "mysql-bin.000042",
|
||||
Position: 1234,
|
||||
GTID: "3E11FA47-71CA-11E1-9E33-C80AA9429562:1-5",
|
||||
},
|
||||
expectError: false,
|
||||
},
|
||||
{
|
||||
name: "invalid format",
|
||||
input: "invalid",
|
||||
expected: nil,
|
||||
expectError: true,
|
||||
},
|
||||
{
|
||||
name: "invalid position",
|
||||
input: "mysql-bin.000042:notanumber",
|
||||
expected: nil,
|
||||
expectError: true,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result, err := ParseBinlogPosition(tt.input)
|
||||
|
||||
if tt.expectError {
|
||||
if err == nil {
|
||||
t.Error("expected error, got nil")
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("unexpected error: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
if result.File != tt.expected.File {
|
||||
t.Errorf("File: got %q, want %q", result.File, tt.expected.File)
|
||||
}
|
||||
if result.Position != tt.expected.Position {
|
||||
t.Errorf("Position: got %d, want %d", result.Position, tt.expected.Position)
|
||||
}
|
||||
if result.GTID != tt.expected.GTID {
|
||||
t.Errorf("GTID: got %q, want %q", result.GTID, tt.expected.GTID)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestExtractBinlogNumber(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
filename string
|
||||
expected int
|
||||
}{
|
||||
{"mysql binlog", "mysql-bin.000042", 42},
|
||||
{"mariadb binlog", "mariadb-bin.000100", 100},
|
||||
{"first binlog", "mysql-bin.000001", 1},
|
||||
{"large number", "mysql-bin.999999", 999999},
|
||||
{"no number", "mysql-bin", 0},
|
||||
{"invalid format", "binlog", 0},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result := extractBinlogNumber(tt.filename)
|
||||
if result != tt.expected {
|
||||
t.Errorf("got %d, want %d", result, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestCompareBinlogFiles(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
a string
|
||||
b string
|
||||
expected int
|
||||
}{
|
||||
{"equal", "mysql-bin.000010", "mysql-bin.000010", 0},
|
||||
{"a < b", "mysql-bin.000009", "mysql-bin.000010", -1},
|
||||
{"a > b", "mysql-bin.000011", "mysql-bin.000010", 1},
|
||||
{"large difference", "mysql-bin.000001", "mysql-bin.000100", -1},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result := compareBinlogFiles(tt.a, tt.b)
|
||||
if result != tt.expected {
|
||||
t.Errorf("got %d, want %d", result, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestValidateBinlogChain(t *testing.T) {
|
||||
ctx := context.Background()
|
||||
bm := &BinlogManager{}
|
||||
|
||||
tests := []struct {
|
||||
name string
|
||||
binlogs []BinlogFile
|
||||
expectValid bool
|
||||
expectGaps int
|
||||
expectWarnings bool
|
||||
}{
|
||||
{
|
||||
name: "empty chain",
|
||||
binlogs: []BinlogFile{},
|
||||
expectValid: true,
|
||||
expectGaps: 0,
|
||||
},
|
||||
{
|
||||
name: "continuous chain",
|
||||
binlogs: []BinlogFile{
|
||||
{Name: "mysql-bin.000001", ServerID: 1},
|
||||
{Name: "mysql-bin.000002", ServerID: 1},
|
||||
{Name: "mysql-bin.000003", ServerID: 1},
|
||||
},
|
||||
expectValid: true,
|
||||
expectGaps: 0,
|
||||
},
|
||||
{
|
||||
name: "chain with gap",
|
||||
binlogs: []BinlogFile{
|
||||
{Name: "mysql-bin.000001", ServerID: 1},
|
||||
{Name: "mysql-bin.000003", ServerID: 1}, // 000002 missing
|
||||
{Name: "mysql-bin.000004", ServerID: 1},
|
||||
},
|
||||
expectValid: false,
|
||||
expectGaps: 1,
|
||||
},
|
||||
{
|
||||
name: "chain with multiple gaps",
|
||||
binlogs: []BinlogFile{
|
||||
{Name: "mysql-bin.000001", ServerID: 1},
|
||||
{Name: "mysql-bin.000005", ServerID: 1}, // 000002-000004 missing
|
||||
{Name: "mysql-bin.000010", ServerID: 1}, // 000006-000009 missing
|
||||
},
|
||||
expectValid: false,
|
||||
expectGaps: 2,
|
||||
},
|
||||
{
|
||||
name: "server_id change warning",
|
||||
binlogs: []BinlogFile{
|
||||
{Name: "mysql-bin.000001", ServerID: 1},
|
||||
{Name: "mysql-bin.000002", ServerID: 2}, // Server ID changed
|
||||
{Name: "mysql-bin.000003", ServerID: 2},
|
||||
},
|
||||
expectValid: true,
|
||||
expectGaps: 0,
|
||||
expectWarnings: true,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result, err := bm.ValidateBinlogChain(ctx, tt.binlogs)
|
||||
if err != nil {
|
||||
t.Fatalf("unexpected error: %v", err)
|
||||
}
|
||||
|
||||
if result.Valid != tt.expectValid {
|
||||
t.Errorf("Valid: got %v, want %v", result.Valid, tt.expectValid)
|
||||
}
|
||||
|
||||
if len(result.Gaps) != tt.expectGaps {
|
||||
t.Errorf("Gaps: got %d, want %d", len(result.Gaps), tt.expectGaps)
|
||||
}
|
||||
|
||||
if tt.expectWarnings && len(result.Warnings) == 0 {
|
||||
t.Error("expected warnings, got none")
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestFindBinlogsInRange(t *testing.T) {
|
||||
ctx := context.Background()
|
||||
bm := &BinlogManager{}
|
||||
|
||||
now := time.Now()
|
||||
hour := time.Hour
|
||||
|
||||
binlogs := []BinlogFile{
|
||||
{
|
||||
Name: "mysql-bin.000001",
|
||||
StartTime: now.Add(-5 * hour),
|
||||
EndTime: now.Add(-4 * hour),
|
||||
},
|
||||
{
|
||||
Name: "mysql-bin.000002",
|
||||
StartTime: now.Add(-4 * hour),
|
||||
EndTime: now.Add(-3 * hour),
|
||||
},
|
||||
{
|
||||
Name: "mysql-bin.000003",
|
||||
StartTime: now.Add(-3 * hour),
|
||||
EndTime: now.Add(-2 * hour),
|
||||
},
|
||||
{
|
||||
Name: "mysql-bin.000004",
|
||||
StartTime: now.Add(-2 * hour),
|
||||
EndTime: now.Add(-1 * hour),
|
||||
},
|
||||
{
|
||||
Name: "mysql-bin.000005",
|
||||
StartTime: now.Add(-1 * hour),
|
||||
EndTime: now,
|
||||
},
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
name string
|
||||
start time.Time
|
||||
end time.Time
|
||||
expected int
|
||||
}{
|
||||
{
|
||||
name: "all binlogs",
|
||||
start: now.Add(-6 * hour),
|
||||
end: now.Add(1 * hour),
|
||||
expected: 5,
|
||||
},
|
||||
{
|
||||
name: "middle range",
|
||||
start: now.Add(-4 * hour),
|
||||
end: now.Add(-2 * hour),
|
||||
expected: 4, // binlogs 1-4 overlap (1 ends at -4h, 4 starts at -2h)
|
||||
},
|
||||
{
|
||||
name: "last two",
|
||||
start: now.Add(-2 * hour),
|
||||
end: now,
|
||||
expected: 3, // binlogs 3-5 overlap (3 ends at -2h, 5 ends at now)
|
||||
},
|
||||
{
|
||||
name: "exact match one binlog",
|
||||
start: now.Add(-3 * hour),
|
||||
end: now.Add(-2 * hour),
|
||||
expected: 3, // binlogs 2,3,4 overlap with this range
|
||||
},
|
||||
{
|
||||
name: "no overlap - before",
|
||||
start: now.Add(-10 * hour),
|
||||
end: now.Add(-6 * hour),
|
||||
expected: 0,
|
||||
},
|
||||
{
|
||||
name: "no overlap - after",
|
||||
start: now.Add(1 * hour),
|
||||
end: now.Add(2 * hour),
|
||||
expected: 0,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
result := bm.FindBinlogsInRange(ctx, binlogs, tt.start, tt.end)
|
||||
if len(result) != tt.expected {
|
||||
t.Errorf("got %d binlogs, want %d", len(result), tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestBinlogArchiveInfo_Metadata(t *testing.T) {
|
||||
// Test that archive metadata is properly saved and loaded
|
||||
tempDir, err := os.MkdirTemp("", "binlog_test")
|
||||
if err != nil {
|
||||
t.Fatalf("creating temp dir: %v", err)
|
||||
}
|
||||
defer os.RemoveAll(tempDir)
|
||||
|
||||
bm := &BinlogManager{
|
||||
archiveDir: tempDir,
|
||||
}
|
||||
|
||||
archives := []BinlogArchiveInfo{
|
||||
{
|
||||
OriginalFile: "mysql-bin.000001",
|
||||
ArchivePath: filepath.Join(tempDir, "mysql-bin.000001.gz"),
|
||||
Size: 1024,
|
||||
Compressed: true,
|
||||
ArchivedAt: time.Now().Add(-2 * time.Hour),
|
||||
StartPos: 4,
|
||||
EndPos: 1024,
|
||||
StartTime: time.Now().Add(-3 * time.Hour),
|
||||
EndTime: time.Now().Add(-2 * time.Hour),
|
||||
},
|
||||
{
|
||||
OriginalFile: "mysql-bin.000002",
|
||||
ArchivePath: filepath.Join(tempDir, "mysql-bin.000002.gz"),
|
||||
Size: 2048,
|
||||
Compressed: true,
|
||||
ArchivedAt: time.Now().Add(-1 * time.Hour),
|
||||
StartPos: 4,
|
||||
EndPos: 2048,
|
||||
StartTime: time.Now().Add(-2 * time.Hour),
|
||||
EndTime: time.Now().Add(-1 * time.Hour),
|
||||
},
|
||||
}
|
||||
|
||||
// Save metadata
|
||||
err = bm.SaveArchiveMetadata(archives)
|
||||
if err != nil {
|
||||
t.Fatalf("saving metadata: %v", err)
|
||||
}
|
||||
|
||||
// Verify metadata file exists
|
||||
metadataPath := filepath.Join(tempDir, "metadata.json")
|
||||
if _, err := os.Stat(metadataPath); os.IsNotExist(err) {
|
||||
t.Fatal("metadata file was not created")
|
||||
}
|
||||
|
||||
// Load and verify
|
||||
loaded := bm.loadArchiveMetadata(metadataPath)
|
||||
if len(loaded) != 2 {
|
||||
t.Errorf("got %d archives, want 2", len(loaded))
|
||||
}
|
||||
|
||||
if loaded["mysql-bin.000001"].Size != 1024 {
|
||||
t.Errorf("wrong size for first archive")
|
||||
}
|
||||
|
||||
if loaded["mysql-bin.000002"].Size != 2048 {
|
||||
t.Errorf("wrong size for second archive")
|
||||
}
|
||||
}
|
||||
|
||||
func TestLimitedScanner(t *testing.T) {
|
||||
// Test the limited scanner used for reading dump headers
|
||||
input := "line1\nline2\nline3\nline4\nline5\nline6\nline7\nline8\nline9\nline10\n"
|
||||
reader := NewLimitedScanner(strings.NewReader(input), 5)
|
||||
|
||||
var lines []string
|
||||
for reader.Scan() {
|
||||
lines = append(lines, reader.Text())
|
||||
}
|
||||
|
||||
if len(lines) != 5 {
|
||||
t.Errorf("got %d lines, want 5", len(lines))
|
||||
}
|
||||
}
|
||||
|
||||
// TestDatabaseType tests database type constants
|
||||
func TestDatabaseType(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
dbType DatabaseType
|
||||
expected string
|
||||
}{
|
||||
{"PostgreSQL", DatabasePostgreSQL, "postgres"},
|
||||
{"MySQL", DatabaseMySQL, "mysql"},
|
||||
{"MariaDB", DatabaseMariaDB, "mariadb"},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
if string(tt.dbType) != tt.expected {
|
||||
t.Errorf("got %q, want %q", tt.dbType, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
// TestRestoreTargetType tests restore target type constants
|
||||
func TestRestoreTargetType(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
target RestoreTargetType
|
||||
expected string
|
||||
}{
|
||||
{"Time", RestoreTargetTime, "time"},
|
||||
{"Position", RestoreTargetPosition, "position"},
|
||||
{"Immediate", RestoreTargetImmediate, "immediate"},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
if string(tt.target) != tt.expected {
|
||||
t.Errorf("got %q, want %q", tt.target, tt.expected)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
155
internal/pitr/interface.go
Normal file
155
internal/pitr/interface.go
Normal file
@@ -0,0 +1,155 @@
|
||||
// Package pitr provides Point-in-Time Recovery functionality
|
||||
// This file contains shared interfaces and types for multi-database PITR support
|
||||
package pitr
|
||||
|
||||
import (
|
||||
"context"
|
||||
"time"
|
||||
)
|
||||
|
||||
// DatabaseType represents the type of database for PITR
|
||||
type DatabaseType string
|
||||
|
||||
const (
|
||||
DatabasePostgreSQL DatabaseType = "postgres"
|
||||
DatabaseMySQL DatabaseType = "mysql"
|
||||
DatabaseMariaDB DatabaseType = "mariadb"
|
||||
)
|
||||
|
||||
// PITRProvider is the interface for database-specific PITR implementations
|
||||
type PITRProvider interface {
|
||||
// DatabaseType returns the database type this provider handles
|
||||
DatabaseType() DatabaseType
|
||||
|
||||
// Enable enables PITR for the database
|
||||
Enable(ctx context.Context, config PITREnableConfig) error
|
||||
|
||||
// Disable disables PITR for the database
|
||||
Disable(ctx context.Context) error
|
||||
|
||||
// Status returns the current PITR status
|
||||
Status(ctx context.Context) (*PITRStatus, error)
|
||||
|
||||
// CreateBackup creates a PITR-capable backup with position recording
|
||||
CreateBackup(ctx context.Context, opts BackupOptions) (*PITRBackupInfo, error)
|
||||
|
||||
// Restore performs a point-in-time restore
|
||||
Restore(ctx context.Context, backup *PITRBackupInfo, target RestoreTarget) error
|
||||
|
||||
// ListRecoveryPoints lists available recovery points/ranges
|
||||
ListRecoveryPoints(ctx context.Context) ([]RecoveryWindow, error)
|
||||
|
||||
// ValidateChain validates the log chain integrity
|
||||
ValidateChain(ctx context.Context, from, to time.Time) (*ChainValidation, error)
|
||||
}
|
||||
|
||||
// PITREnableConfig holds configuration for enabling PITR
|
||||
type PITREnableConfig struct {
|
||||
ArchiveDir string // Directory to store archived logs
|
||||
RetentionDays int // Days to keep archives
|
||||
ArchiveInterval time.Duration // How often to check for new logs (MySQL)
|
||||
Compression bool // Compress archived logs
|
||||
Encryption bool // Encrypt archived logs
|
||||
EncryptionKey []byte // Encryption key
|
||||
}
|
||||
|
||||
// PITRStatus represents the current PITR configuration status
|
||||
type PITRStatus struct {
|
||||
Enabled bool
|
||||
DatabaseType DatabaseType
|
||||
ArchiveDir string
|
||||
LogLevel string // WAL level (postgres) or binlog format (mysql)
|
||||
ArchiveMethod string // archive_command (postgres) or manual (mysql)
|
||||
Position LogPosition
|
||||
LastArchived time.Time
|
||||
ArchiveCount int
|
||||
ArchiveSize int64
|
||||
}
|
||||
|
||||
// LogPosition is a generic interface for database-specific log positions
|
||||
type LogPosition interface {
|
||||
// String returns a string representation of the position
|
||||
String() string
|
||||
// IsZero returns true if the position is unset
|
||||
IsZero() bool
|
||||
// Compare returns -1 if p < other, 0 if equal, 1 if p > other
|
||||
Compare(other LogPosition) int
|
||||
}
|
||||
|
||||
// BackupOptions holds options for creating a PITR backup
|
||||
type BackupOptions struct {
|
||||
Database string // Database name (empty for all)
|
||||
OutputPath string // Where to save the backup
|
||||
Compression bool
|
||||
CompressionLvl int
|
||||
Encryption bool
|
||||
EncryptionKey []byte
|
||||
FlushLogs bool // Flush logs before backup (mysql)
|
||||
SingleTxn bool // Single transaction mode
|
||||
}
|
||||
|
||||
// PITRBackupInfo contains metadata about a PITR-capable backup
|
||||
type PITRBackupInfo struct {
|
||||
BackupFile string `json:"backup_file"`
|
||||
DatabaseType DatabaseType `json:"database_type"`
|
||||
DatabaseName string `json:"database_name,omitempty"`
|
||||
Timestamp time.Time `json:"timestamp"`
|
||||
ServerVersion string `json:"server_version"`
|
||||
ServerID int `json:"server_id,omitempty"` // MySQL server_id
|
||||
Position LogPosition `json:"-"` // Start position (type-specific)
|
||||
PositionJSON string `json:"position"` // Serialized position
|
||||
SizeBytes int64 `json:"size_bytes"`
|
||||
Compressed bool `json:"compressed"`
|
||||
Encrypted bool `json:"encrypted"`
|
||||
}
|
||||
|
||||
// RestoreTarget specifies the point-in-time to restore to
|
||||
type RestoreTarget struct {
|
||||
Type RestoreTargetType
|
||||
Time *time.Time // For RestoreTargetTime
|
||||
Position LogPosition // For RestoreTargetPosition (LSN, binlog pos, GTID)
|
||||
Inclusive bool // Include target transaction
|
||||
DryRun bool // Only show what would be done
|
||||
StopOnErr bool // Stop replay on first error
|
||||
}
|
||||
|
||||
// RestoreTargetType defines the type of restore target
|
||||
type RestoreTargetType string
|
||||
|
||||
const (
|
||||
RestoreTargetTime RestoreTargetType = "time"
|
||||
RestoreTargetPosition RestoreTargetType = "position"
|
||||
RestoreTargetImmediate RestoreTargetType = "immediate"
|
||||
)
|
||||
|
||||
// RecoveryWindow represents a time range available for recovery
|
||||
type RecoveryWindow struct {
|
||||
BaseBackup string `json:"base_backup"`
|
||||
BackupTime time.Time `json:"backup_time"`
|
||||
StartPosition LogPosition `json:"-"`
|
||||
EndPosition LogPosition `json:"-"`
|
||||
StartTime time.Time `json:"start_time"`
|
||||
EndTime time.Time `json:"end_time"`
|
||||
LogFiles []string `json:"log_files"` // WAL segments or binlog files
|
||||
HasGaps bool `json:"has_gaps"`
|
||||
GapDetails []string `json:"gap_details,omitempty"`
|
||||
}
|
||||
|
||||
// ChainValidation contains results of log chain validation
|
||||
type ChainValidation struct {
|
||||
Valid bool
|
||||
StartPos LogPosition
|
||||
EndPos LogPosition
|
||||
LogCount int
|
||||
TotalSize int64
|
||||
Gaps []LogGap
|
||||
Errors []string
|
||||
Warnings []string
|
||||
}
|
||||
|
||||
// LogGap represents a gap in the log chain
|
||||
type LogGap struct {
|
||||
After string // Log file/position after which gap occurs
|
||||
Before string // Log file/position where chain resumes
|
||||
Reason string // Reason for gap if known
|
||||
}
|
||||
924
internal/pitr/mysql.go
Normal file
924
internal/pitr/mysql.go
Normal file
@@ -0,0 +1,924 @@
|
||||
// Package pitr provides Point-in-Time Recovery functionality
|
||||
// This file contains the MySQL/MariaDB PITR provider implementation
|
||||
package pitr
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"compress/gzip"
|
||||
"context"
|
||||
"database/sql"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
"os/exec"
|
||||
"path/filepath"
|
||||
"regexp"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
)
|
||||
|
||||
// MySQLPITR implements PITRProvider for MySQL and MariaDB
|
||||
type MySQLPITR struct {
|
||||
db *sql.DB
|
||||
config MySQLPITRConfig
|
||||
binlogManager *BinlogManager
|
||||
serverType DatabaseType
|
||||
serverVersion string
|
||||
serverID uint32
|
||||
gtidMode bool
|
||||
}
|
||||
|
||||
// MySQLPITRConfig holds configuration for MySQL PITR
|
||||
type MySQLPITRConfig struct {
|
||||
// Connection settings
|
||||
Host string `json:"host"`
|
||||
Port int `json:"port"`
|
||||
User string `json:"user"`
|
||||
Password string `json:"password,omitempty"`
|
||||
Socket string `json:"socket,omitempty"`
|
||||
|
||||
// Paths
|
||||
DataDir string `json:"data_dir"`
|
||||
BinlogDir string `json:"binlog_dir"`
|
||||
ArchiveDir string `json:"archive_dir"`
|
||||
RestoreDir string `json:"restore_dir"`
|
||||
|
||||
// Archive settings
|
||||
ArchiveInterval time.Duration `json:"archive_interval"`
|
||||
RetentionDays int `json:"retention_days"`
|
||||
Compression bool `json:"compression"`
|
||||
CompressionLevel int `json:"compression_level"`
|
||||
Encryption bool `json:"encryption"`
|
||||
EncryptionKey []byte `json:"-"`
|
||||
|
||||
// Behavior settings
|
||||
RequireRowFormat bool `json:"require_row_format"`
|
||||
RequireGTID bool `json:"require_gtid"`
|
||||
FlushLogsOnBackup bool `json:"flush_logs_on_backup"`
|
||||
LockTables bool `json:"lock_tables"`
|
||||
SingleTransaction bool `json:"single_transaction"`
|
||||
}
|
||||
|
||||
// NewMySQLPITR creates a new MySQL PITR provider
|
||||
func NewMySQLPITR(db *sql.DB, config MySQLPITRConfig) (*MySQLPITR, error) {
|
||||
m := &MySQLPITR{
|
||||
db: db,
|
||||
config: config,
|
||||
}
|
||||
|
||||
// Detect server type and version
|
||||
if err := m.detectServerInfo(); err != nil {
|
||||
return nil, fmt.Errorf("detecting server info: %w", err)
|
||||
}
|
||||
|
||||
// Initialize binlog manager
|
||||
binlogConfig := BinlogManagerConfig{
|
||||
BinlogDir: config.BinlogDir,
|
||||
ArchiveDir: config.ArchiveDir,
|
||||
Compression: config.Compression,
|
||||
Encryption: config.Encryption,
|
||||
EncryptionKey: config.EncryptionKey,
|
||||
}
|
||||
var err error
|
||||
m.binlogManager, err = NewBinlogManager(binlogConfig)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("creating binlog manager: %w", err)
|
||||
}
|
||||
|
||||
return m, nil
|
||||
}
|
||||
|
||||
// detectServerInfo detects MySQL/MariaDB version and configuration
|
||||
func (m *MySQLPITR) detectServerInfo() error {
|
||||
// Get version
|
||||
var version string
|
||||
err := m.db.QueryRow("SELECT VERSION()").Scan(&version)
|
||||
if err != nil {
|
||||
return fmt.Errorf("getting version: %w", err)
|
||||
}
|
||||
m.serverVersion = version
|
||||
|
||||
// Detect MariaDB vs MySQL
|
||||
if strings.Contains(strings.ToLower(version), "mariadb") {
|
||||
m.serverType = DatabaseMariaDB
|
||||
} else {
|
||||
m.serverType = DatabaseMySQL
|
||||
}
|
||||
|
||||
// Get server_id
|
||||
var serverID int
|
||||
err = m.db.QueryRow("SELECT @@server_id").Scan(&serverID)
|
||||
if err == nil {
|
||||
m.serverID = uint32(serverID)
|
||||
}
|
||||
|
||||
// Check GTID mode
|
||||
if m.serverType == DatabaseMySQL {
|
||||
var gtidMode string
|
||||
err = m.db.QueryRow("SELECT @@gtid_mode").Scan(>idMode)
|
||||
if err == nil {
|
||||
m.gtidMode = strings.ToUpper(gtidMode) == "ON"
|
||||
}
|
||||
} else {
|
||||
// MariaDB uses different variables
|
||||
var gtidPos string
|
||||
err = m.db.QueryRow("SELECT @@gtid_current_pos").Scan(>idPos)
|
||||
m.gtidMode = err == nil && gtidPos != ""
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// DatabaseType returns the database type this provider handles
|
||||
func (m *MySQLPITR) DatabaseType() DatabaseType {
|
||||
return m.serverType
|
||||
}
|
||||
|
||||
// Enable enables PITR for the MySQL database
|
||||
func (m *MySQLPITR) Enable(ctx context.Context, config PITREnableConfig) error {
|
||||
// Check current binlog settings
|
||||
status, err := m.Status(ctx)
|
||||
if err != nil {
|
||||
return fmt.Errorf("checking status: %w", err)
|
||||
}
|
||||
|
||||
var issues []string
|
||||
|
||||
// Check if binlog is enabled
|
||||
var logBin string
|
||||
if err := m.db.QueryRowContext(ctx, "SELECT @@log_bin").Scan(&logBin); err != nil {
|
||||
return fmt.Errorf("checking log_bin: %w", err)
|
||||
}
|
||||
if logBin != "1" && strings.ToUpper(logBin) != "ON" {
|
||||
issues = append(issues, "binary logging is not enabled (log_bin=OFF)")
|
||||
issues = append(issues, " Add to my.cnf: log_bin = mysql-bin")
|
||||
}
|
||||
|
||||
// Check binlog format
|
||||
if m.config.RequireRowFormat && status.LogLevel != "ROW" {
|
||||
issues = append(issues, fmt.Sprintf("binlog_format is %s, not ROW", status.LogLevel))
|
||||
issues = append(issues, " Add to my.cnf: binlog_format = ROW")
|
||||
}
|
||||
|
||||
// Check GTID mode if required
|
||||
if m.config.RequireGTID && !m.gtidMode {
|
||||
issues = append(issues, "GTID mode is not enabled")
|
||||
if m.serverType == DatabaseMySQL {
|
||||
issues = append(issues, " Add to my.cnf: gtid_mode = ON, enforce_gtid_consistency = ON")
|
||||
} else {
|
||||
issues = append(issues, " MariaDB: GTIDs are automatically managed with log_slave_updates")
|
||||
}
|
||||
}
|
||||
|
||||
// Check expire_logs_days (don't want logs expiring before we archive them)
|
||||
var expireDays int
|
||||
m.db.QueryRowContext(ctx, "SELECT @@expire_logs_days").Scan(&expireDays)
|
||||
if expireDays > 0 && expireDays < config.RetentionDays {
|
||||
issues = append(issues,
|
||||
fmt.Sprintf("expire_logs_days (%d) is less than retention days (%d)",
|
||||
expireDays, config.RetentionDays))
|
||||
}
|
||||
|
||||
if len(issues) > 0 {
|
||||
return fmt.Errorf("PITR requirements not met:\n - %s", strings.Join(issues, "\n - "))
|
||||
}
|
||||
|
||||
// Update archive configuration
|
||||
m.config.ArchiveDir = config.ArchiveDir
|
||||
m.config.RetentionDays = config.RetentionDays
|
||||
m.config.ArchiveInterval = config.ArchiveInterval
|
||||
m.config.Compression = config.Compression
|
||||
m.config.Encryption = config.Encryption
|
||||
m.config.EncryptionKey = config.EncryptionKey
|
||||
|
||||
// Create archive directory
|
||||
if err := os.MkdirAll(config.ArchiveDir, 0750); err != nil {
|
||||
return fmt.Errorf("creating archive directory: %w", err)
|
||||
}
|
||||
|
||||
// Save configuration
|
||||
configPath := filepath.Join(config.ArchiveDir, "pitr_config.json")
|
||||
configData, _ := json.MarshalIndent(map[string]interface{}{
|
||||
"enabled": true,
|
||||
"server_type": m.serverType,
|
||||
"server_version": m.serverVersion,
|
||||
"server_id": m.serverID,
|
||||
"gtid_mode": m.gtidMode,
|
||||
"archive_dir": config.ArchiveDir,
|
||||
"retention_days": config.RetentionDays,
|
||||
"archive_interval": config.ArchiveInterval.String(),
|
||||
"compression": config.Compression,
|
||||
"encryption": config.Encryption,
|
||||
"created_at": time.Now().Format(time.RFC3339),
|
||||
}, "", " ")
|
||||
if err := os.WriteFile(configPath, configData, 0640); err != nil {
|
||||
return fmt.Errorf("saving config: %w", err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Disable disables PITR for the MySQL database
|
||||
func (m *MySQLPITR) Disable(ctx context.Context) error {
|
||||
configPath := filepath.Join(m.config.ArchiveDir, "pitr_config.json")
|
||||
|
||||
// Check if config exists
|
||||
if _, err := os.Stat(configPath); os.IsNotExist(err) {
|
||||
return fmt.Errorf("PITR is not enabled (no config file found)")
|
||||
}
|
||||
|
||||
// Update config to disabled
|
||||
configData, _ := json.MarshalIndent(map[string]interface{}{
|
||||
"enabled": false,
|
||||
"disabled_at": time.Now().Format(time.RFC3339),
|
||||
}, "", " ")
|
||||
|
||||
if err := os.WriteFile(configPath, configData, 0640); err != nil {
|
||||
return fmt.Errorf("updating config: %w", err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Status returns the current PITR status
|
||||
func (m *MySQLPITR) Status(ctx context.Context) (*PITRStatus, error) {
|
||||
status := &PITRStatus{
|
||||
DatabaseType: m.serverType,
|
||||
ArchiveDir: m.config.ArchiveDir,
|
||||
}
|
||||
|
||||
// Check if PITR is enabled via config file
|
||||
configPath := filepath.Join(m.config.ArchiveDir, "pitr_config.json")
|
||||
if data, err := os.ReadFile(configPath); err == nil {
|
||||
var config map[string]interface{}
|
||||
if json.Unmarshal(data, &config) == nil {
|
||||
if enabled, ok := config["enabled"].(bool); ok {
|
||||
status.Enabled = enabled
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Get binlog format
|
||||
var binlogFormat string
|
||||
if err := m.db.QueryRowContext(ctx, "SELECT @@binlog_format").Scan(&binlogFormat); err == nil {
|
||||
status.LogLevel = binlogFormat
|
||||
}
|
||||
|
||||
// Get current position
|
||||
pos, err := m.GetCurrentPosition(ctx)
|
||||
if err == nil {
|
||||
status.Position = pos
|
||||
}
|
||||
|
||||
// Get archive stats
|
||||
if m.config.ArchiveDir != "" {
|
||||
archives, err := m.binlogManager.ListArchivedBinlogs(ctx)
|
||||
if err == nil {
|
||||
status.ArchiveCount = len(archives)
|
||||
for _, a := range archives {
|
||||
status.ArchiveSize += a.Size
|
||||
if a.ArchivedAt.After(status.LastArchived) {
|
||||
status.LastArchived = a.ArchivedAt
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
status.ArchiveMethod = "manual" // MySQL doesn't have automatic archiving like PostgreSQL
|
||||
|
||||
return status, nil
|
||||
}
|
||||
|
||||
// GetCurrentPosition retrieves the current binary log position
|
||||
func (m *MySQLPITR) GetCurrentPosition(ctx context.Context) (*BinlogPosition, error) {
|
||||
pos := &BinlogPosition{}
|
||||
|
||||
// Use SHOW MASTER STATUS for current position
|
||||
rows, err := m.db.QueryContext(ctx, "SHOW MASTER STATUS")
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("getting master status: %w", err)
|
||||
}
|
||||
defer rows.Close()
|
||||
|
||||
if rows.Next() {
|
||||
var file string
|
||||
var position uint64
|
||||
var binlogDoDB, binlogIgnoreDB, executedGtidSet sql.NullString
|
||||
|
||||
cols, _ := rows.Columns()
|
||||
switch len(cols) {
|
||||
case 5: // MySQL 5.6+
|
||||
err = rows.Scan(&file, &position, &binlogDoDB, &binlogIgnoreDB, &executedGtidSet)
|
||||
case 4: // Older versions
|
||||
err = rows.Scan(&file, &position, &binlogDoDB, &binlogIgnoreDB)
|
||||
default:
|
||||
err = rows.Scan(&file, &position)
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("scanning master status: %w", err)
|
||||
}
|
||||
|
||||
pos.File = file
|
||||
pos.Position = position
|
||||
pos.ServerID = m.serverID
|
||||
|
||||
if executedGtidSet.Valid {
|
||||
pos.GTID = executedGtidSet.String
|
||||
}
|
||||
} else {
|
||||
return nil, fmt.Errorf("no master status available (is binary logging enabled?)")
|
||||
}
|
||||
|
||||
// For MariaDB, get GTID position differently
|
||||
if m.serverType == DatabaseMariaDB && pos.GTID == "" {
|
||||
var gtidPos string
|
||||
if err := m.db.QueryRowContext(ctx, "SELECT @@gtid_current_pos").Scan(>idPos); err == nil {
|
||||
pos.GTID = gtidPos
|
||||
}
|
||||
}
|
||||
|
||||
return pos, nil
|
||||
}
|
||||
|
||||
// CreateBackup creates a PITR-capable backup with position recording
|
||||
func (m *MySQLPITR) CreateBackup(ctx context.Context, opts BackupOptions) (*PITRBackupInfo, error) {
|
||||
// Get position BEFORE flushing logs
|
||||
startPos, err := m.GetCurrentPosition(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("getting start position: %w", err)
|
||||
}
|
||||
|
||||
// Optionally flush logs to start a new binlog file
|
||||
if opts.FlushLogs || m.config.FlushLogsOnBackup {
|
||||
if _, err := m.db.ExecContext(ctx, "FLUSH BINARY LOGS"); err != nil {
|
||||
return nil, fmt.Errorf("flushing binary logs: %w", err)
|
||||
}
|
||||
// Get new position after flush
|
||||
startPos, err = m.GetCurrentPosition(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("getting position after flush: %w", err)
|
||||
}
|
||||
}
|
||||
|
||||
// Build mysqldump command
|
||||
dumpArgs := []string{
|
||||
"--single-transaction",
|
||||
"--routines",
|
||||
"--triggers",
|
||||
"--events",
|
||||
"--master-data=2", // Include binlog position as comment
|
||||
}
|
||||
|
||||
if m.config.FlushLogsOnBackup {
|
||||
dumpArgs = append(dumpArgs, "--flush-logs")
|
||||
}
|
||||
|
||||
// Add connection params
|
||||
if m.config.Host != "" {
|
||||
dumpArgs = append(dumpArgs, "-h", m.config.Host)
|
||||
}
|
||||
if m.config.Port > 0 {
|
||||
dumpArgs = append(dumpArgs, "-P", strconv.Itoa(m.config.Port))
|
||||
}
|
||||
if m.config.User != "" {
|
||||
dumpArgs = append(dumpArgs, "-u", m.config.User)
|
||||
}
|
||||
if m.config.Password != "" {
|
||||
dumpArgs = append(dumpArgs, "-p"+m.config.Password)
|
||||
}
|
||||
if m.config.Socket != "" {
|
||||
dumpArgs = append(dumpArgs, "-S", m.config.Socket)
|
||||
}
|
||||
|
||||
// Add database selection
|
||||
if opts.Database != "" {
|
||||
dumpArgs = append(dumpArgs, opts.Database)
|
||||
} else {
|
||||
dumpArgs = append(dumpArgs, "--all-databases")
|
||||
}
|
||||
|
||||
// Create output file
|
||||
timestamp := time.Now().Format("20060102_150405")
|
||||
backupName := fmt.Sprintf("mysql_pitr_%s.sql", timestamp)
|
||||
if opts.Compression {
|
||||
backupName += ".gz"
|
||||
}
|
||||
backupPath := filepath.Join(opts.OutputPath, backupName)
|
||||
|
||||
if err := os.MkdirAll(opts.OutputPath, 0750); err != nil {
|
||||
return nil, fmt.Errorf("creating output directory: %w", err)
|
||||
}
|
||||
|
||||
// Run mysqldump
|
||||
cmd := exec.CommandContext(ctx, "mysqldump", dumpArgs...)
|
||||
|
||||
// Create output file
|
||||
outFile, err := os.Create(backupPath)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("creating backup file: %w", err)
|
||||
}
|
||||
defer outFile.Close()
|
||||
|
||||
var writer io.WriteCloser = outFile
|
||||
|
||||
if opts.Compression {
|
||||
gzWriter := NewGzipWriter(outFile, opts.CompressionLvl)
|
||||
writer = gzWriter
|
||||
defer gzWriter.Close()
|
||||
}
|
||||
|
||||
cmd.Stdout = writer
|
||||
cmd.Stderr = os.Stderr
|
||||
|
||||
if err := cmd.Run(); err != nil {
|
||||
os.Remove(backupPath)
|
||||
return nil, fmt.Errorf("mysqldump failed: %w", err)
|
||||
}
|
||||
|
||||
// Close writers
|
||||
if opts.Compression {
|
||||
writer.Close()
|
||||
}
|
||||
|
||||
// Get file size
|
||||
info, err := os.Stat(backupPath)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("getting backup info: %w", err)
|
||||
}
|
||||
|
||||
// Serialize position for JSON storage
|
||||
posJSON, _ := json.Marshal(startPos)
|
||||
|
||||
backupInfo := &PITRBackupInfo{
|
||||
BackupFile: backupPath,
|
||||
DatabaseType: m.serverType,
|
||||
DatabaseName: opts.Database,
|
||||
Timestamp: time.Now(),
|
||||
ServerVersion: m.serverVersion,
|
||||
ServerID: int(m.serverID),
|
||||
Position: startPos,
|
||||
PositionJSON: string(posJSON),
|
||||
SizeBytes: info.Size(),
|
||||
Compressed: opts.Compression,
|
||||
Encrypted: opts.Encryption,
|
||||
}
|
||||
|
||||
// Save metadata alongside backup
|
||||
metadataPath := backupPath + ".meta"
|
||||
metaData, _ := json.MarshalIndent(backupInfo, "", " ")
|
||||
os.WriteFile(metadataPath, metaData, 0640)
|
||||
|
||||
return backupInfo, nil
|
||||
}
|
||||
|
||||
// Restore performs a point-in-time restore
|
||||
func (m *MySQLPITR) Restore(ctx context.Context, backup *PITRBackupInfo, target RestoreTarget) error {
|
||||
// Step 1: Restore base backup
|
||||
if err := m.restoreBaseBackup(ctx, backup); err != nil {
|
||||
return fmt.Errorf("restoring base backup: %w", err)
|
||||
}
|
||||
|
||||
// Step 2: If target time is after backup time, replay binlogs
|
||||
if target.Type == RestoreTargetImmediate {
|
||||
return nil // Just restore to backup point
|
||||
}
|
||||
|
||||
// Parse start position from backup
|
||||
var startPos BinlogPosition
|
||||
if err := json.Unmarshal([]byte(backup.PositionJSON), &startPos); err != nil {
|
||||
return fmt.Errorf("parsing backup position: %w", err)
|
||||
}
|
||||
|
||||
// Step 3: Find binlogs to replay
|
||||
binlogs, err := m.binlogManager.DiscoverBinlogs(ctx)
|
||||
if err != nil {
|
||||
return fmt.Errorf("discovering binlogs: %w", err)
|
||||
}
|
||||
|
||||
// Find archived binlogs too
|
||||
archivedBinlogs, _ := m.binlogManager.ListArchivedBinlogs(ctx)
|
||||
|
||||
var filesToReplay []string
|
||||
|
||||
// Determine which binlogs to replay based on target
|
||||
switch target.Type {
|
||||
case RestoreTargetTime:
|
||||
if target.Time == nil {
|
||||
return fmt.Errorf("target time not specified")
|
||||
}
|
||||
// Find binlogs in range
|
||||
relevantBinlogs := m.binlogManager.FindBinlogsInRange(ctx, binlogs, backup.Timestamp, *target.Time)
|
||||
for _, b := range relevantBinlogs {
|
||||
filesToReplay = append(filesToReplay, b.Path)
|
||||
}
|
||||
// Also check archives
|
||||
for _, a := range archivedBinlogs {
|
||||
if compareBinlogFiles(a.OriginalFile, startPos.File) >= 0 {
|
||||
if !a.EndTime.IsZero() && !a.EndTime.Before(backup.Timestamp) && !a.StartTime.After(*target.Time) {
|
||||
filesToReplay = append(filesToReplay, a.ArchivePath)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
case RestoreTargetPosition:
|
||||
if target.Position == nil {
|
||||
return fmt.Errorf("target position not specified")
|
||||
}
|
||||
targetPos, ok := target.Position.(*BinlogPosition)
|
||||
if !ok {
|
||||
return fmt.Errorf("invalid target position type")
|
||||
}
|
||||
// Find binlogs from start to target position
|
||||
for _, b := range binlogs {
|
||||
if compareBinlogFiles(b.Name, startPos.File) >= 0 &&
|
||||
compareBinlogFiles(b.Name, targetPos.File) <= 0 {
|
||||
filesToReplay = append(filesToReplay, b.Path)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if len(filesToReplay) == 0 {
|
||||
// Nothing to replay, backup is already at or past target
|
||||
return nil
|
||||
}
|
||||
|
||||
// Step 4: Replay binlogs
|
||||
replayOpts := ReplayOptions{
|
||||
BinlogFiles: filesToReplay,
|
||||
StartPosition: &startPos,
|
||||
DryRun: target.DryRun,
|
||||
MySQLHost: m.config.Host,
|
||||
MySQLPort: m.config.Port,
|
||||
MySQLUser: m.config.User,
|
||||
MySQLPass: m.config.Password,
|
||||
StopOnError: target.StopOnErr,
|
||||
}
|
||||
|
||||
if target.Type == RestoreTargetTime && target.Time != nil {
|
||||
replayOpts.StopTime = target.Time
|
||||
}
|
||||
if target.Type == RestoreTargetPosition && target.Position != nil {
|
||||
replayOpts.StopPosition = target.Position
|
||||
}
|
||||
|
||||
if target.DryRun {
|
||||
replayOpts.Output = os.Stdout
|
||||
}
|
||||
|
||||
return m.binlogManager.ReplayBinlogs(ctx, replayOpts)
|
||||
}
|
||||
|
||||
// restoreBaseBackup restores the base MySQL backup
|
||||
func (m *MySQLPITR) restoreBaseBackup(ctx context.Context, backup *PITRBackupInfo) error {
|
||||
// Build mysql command
|
||||
mysqlArgs := []string{}
|
||||
|
||||
if m.config.Host != "" {
|
||||
mysqlArgs = append(mysqlArgs, "-h", m.config.Host)
|
||||
}
|
||||
if m.config.Port > 0 {
|
||||
mysqlArgs = append(mysqlArgs, "-P", strconv.Itoa(m.config.Port))
|
||||
}
|
||||
if m.config.User != "" {
|
||||
mysqlArgs = append(mysqlArgs, "-u", m.config.User)
|
||||
}
|
||||
if m.config.Password != "" {
|
||||
mysqlArgs = append(mysqlArgs, "-p"+m.config.Password)
|
||||
}
|
||||
if m.config.Socket != "" {
|
||||
mysqlArgs = append(mysqlArgs, "-S", m.config.Socket)
|
||||
}
|
||||
|
||||
// Prepare input
|
||||
var input io.Reader
|
||||
backupFile, err := os.Open(backup.BackupFile)
|
||||
if err != nil {
|
||||
return fmt.Errorf("opening backup file: %w", err)
|
||||
}
|
||||
defer backupFile.Close()
|
||||
|
||||
input = backupFile
|
||||
|
||||
// Handle compressed backups
|
||||
if backup.Compressed || strings.HasSuffix(backup.BackupFile, ".gz") {
|
||||
gzReader, err := NewGzipReader(backupFile)
|
||||
if err != nil {
|
||||
return fmt.Errorf("creating gzip reader: %w", err)
|
||||
}
|
||||
defer gzReader.Close()
|
||||
input = gzReader
|
||||
}
|
||||
|
||||
// Run mysql
|
||||
cmd := exec.CommandContext(ctx, "mysql", mysqlArgs...)
|
||||
cmd.Stdin = input
|
||||
cmd.Stdout = os.Stdout
|
||||
cmd.Stderr = os.Stderr
|
||||
|
||||
return cmd.Run()
|
||||
}
|
||||
|
||||
// ListRecoveryPoints lists available recovery points/ranges
|
||||
func (m *MySQLPITR) ListRecoveryPoints(ctx context.Context) ([]RecoveryWindow, error) {
|
||||
var windows []RecoveryWindow
|
||||
|
||||
// Find all backup metadata files
|
||||
backupPattern := filepath.Join(m.config.ArchiveDir, "..", "*", "*.meta")
|
||||
metaFiles, _ := filepath.Glob(backupPattern)
|
||||
|
||||
// Also check default backup locations
|
||||
additionalPaths := []string{
|
||||
filepath.Join(m.config.ArchiveDir, "*.meta"),
|
||||
filepath.Join(m.config.RestoreDir, "*.meta"),
|
||||
}
|
||||
for _, p := range additionalPaths {
|
||||
matches, _ := filepath.Glob(p)
|
||||
metaFiles = append(metaFiles, matches...)
|
||||
}
|
||||
|
||||
// Get current binlogs
|
||||
binlogs, err := m.binlogManager.DiscoverBinlogs(ctx)
|
||||
if err != nil {
|
||||
binlogs = []BinlogFile{}
|
||||
}
|
||||
|
||||
// Get archived binlogs
|
||||
archivedBinlogs, _ := m.binlogManager.ListArchivedBinlogs(ctx)
|
||||
|
||||
for _, metaFile := range metaFiles {
|
||||
data, err := os.ReadFile(metaFile)
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
var backup PITRBackupInfo
|
||||
if err := json.Unmarshal(data, &backup); err != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
// Parse position
|
||||
var startPos BinlogPosition
|
||||
json.Unmarshal([]byte(backup.PositionJSON), &startPos)
|
||||
|
||||
window := RecoveryWindow{
|
||||
BaseBackup: backup.BackupFile,
|
||||
BackupTime: backup.Timestamp,
|
||||
StartTime: backup.Timestamp,
|
||||
StartPosition: &startPos,
|
||||
}
|
||||
|
||||
// Find binlogs available after this backup
|
||||
var relevantBinlogs []string
|
||||
var latestTime time.Time
|
||||
var latestPos *BinlogPosition
|
||||
|
||||
for _, b := range binlogs {
|
||||
if compareBinlogFiles(b.Name, startPos.File) >= 0 {
|
||||
relevantBinlogs = append(relevantBinlogs, b.Name)
|
||||
if !b.EndTime.IsZero() && b.EndTime.After(latestTime) {
|
||||
latestTime = b.EndTime
|
||||
latestPos = &BinlogPosition{
|
||||
File: b.Name,
|
||||
Position: b.EndPos,
|
||||
GTID: b.GTID,
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for _, a := range archivedBinlogs {
|
||||
if compareBinlogFiles(a.OriginalFile, startPos.File) >= 0 {
|
||||
relevantBinlogs = append(relevantBinlogs, a.OriginalFile)
|
||||
if !a.EndTime.IsZero() && a.EndTime.After(latestTime) {
|
||||
latestTime = a.EndTime
|
||||
latestPos = &BinlogPosition{
|
||||
File: a.OriginalFile,
|
||||
Position: a.EndPos,
|
||||
GTID: a.GTID,
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
window.LogFiles = relevantBinlogs
|
||||
if !latestTime.IsZero() {
|
||||
window.EndTime = latestTime
|
||||
} else {
|
||||
window.EndTime = time.Now()
|
||||
}
|
||||
window.EndPosition = latestPos
|
||||
|
||||
// Check for gaps
|
||||
validation, _ := m.binlogManager.ValidateBinlogChain(ctx, binlogs)
|
||||
if validation != nil {
|
||||
window.HasGaps = !validation.Valid
|
||||
for _, gap := range validation.Gaps {
|
||||
window.GapDetails = append(window.GapDetails, gap.Reason)
|
||||
}
|
||||
}
|
||||
|
||||
windows = append(windows, window)
|
||||
}
|
||||
|
||||
return windows, nil
|
||||
}
|
||||
|
||||
// ValidateChain validates the log chain integrity
|
||||
func (m *MySQLPITR) ValidateChain(ctx context.Context, from, to time.Time) (*ChainValidation, error) {
|
||||
// Discover all binlogs
|
||||
binlogs, err := m.binlogManager.DiscoverBinlogs(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("discovering binlogs: %w", err)
|
||||
}
|
||||
|
||||
// Filter to time range
|
||||
relevant := m.binlogManager.FindBinlogsInRange(ctx, binlogs, from, to)
|
||||
|
||||
// Validate chain
|
||||
return m.binlogManager.ValidateBinlogChain(ctx, relevant)
|
||||
}
|
||||
|
||||
// ArchiveNewBinlogs archives any binlog files that haven't been archived yet
|
||||
func (m *MySQLPITR) ArchiveNewBinlogs(ctx context.Context) ([]BinlogArchiveInfo, error) {
|
||||
// Get current binlogs
|
||||
binlogs, err := m.binlogManager.DiscoverBinlogs(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("discovering binlogs: %w", err)
|
||||
}
|
||||
|
||||
// Get already archived
|
||||
archived, _ := m.binlogManager.ListArchivedBinlogs(ctx)
|
||||
archivedSet := make(map[string]struct{})
|
||||
for _, a := range archived {
|
||||
archivedSet[a.OriginalFile] = struct{}{}
|
||||
}
|
||||
|
||||
// Get current binlog file (don't archive the active one)
|
||||
currentPos, _ := m.GetCurrentPosition(ctx)
|
||||
currentFile := ""
|
||||
if currentPos != nil {
|
||||
currentFile = currentPos.File
|
||||
}
|
||||
|
||||
var newArchives []BinlogArchiveInfo
|
||||
for i := range binlogs {
|
||||
b := &binlogs[i]
|
||||
|
||||
// Skip if already archived
|
||||
if _, exists := archivedSet[b.Name]; exists {
|
||||
continue
|
||||
}
|
||||
|
||||
// Skip the current active binlog
|
||||
if b.Name == currentFile {
|
||||
continue
|
||||
}
|
||||
|
||||
// Archive
|
||||
archiveInfo, err := m.binlogManager.ArchiveBinlog(ctx, b)
|
||||
if err != nil {
|
||||
// Log but continue
|
||||
continue
|
||||
}
|
||||
newArchives = append(newArchives, *archiveInfo)
|
||||
}
|
||||
|
||||
// Update metadata
|
||||
if len(newArchives) > 0 {
|
||||
allArchived, _ := m.binlogManager.ListArchivedBinlogs(ctx)
|
||||
m.binlogManager.SaveArchiveMetadata(allArchived)
|
||||
}
|
||||
|
||||
return newArchives, nil
|
||||
}
|
||||
|
||||
// PurgeBinlogs purges old binlog files based on retention policy
|
||||
func (m *MySQLPITR) PurgeBinlogs(ctx context.Context) error {
|
||||
if m.config.RetentionDays <= 0 {
|
||||
return fmt.Errorf("retention days not configured")
|
||||
}
|
||||
|
||||
cutoff := time.Now().AddDate(0, 0, -m.config.RetentionDays)
|
||||
|
||||
// Get archived binlogs
|
||||
archived, err := m.binlogManager.ListArchivedBinlogs(ctx)
|
||||
if err != nil {
|
||||
return fmt.Errorf("listing archived binlogs: %w", err)
|
||||
}
|
||||
|
||||
for _, a := range archived {
|
||||
if a.ArchivedAt.Before(cutoff) {
|
||||
os.Remove(a.ArchivePath)
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// GzipWriter is a helper for gzip compression
|
||||
type GzipWriter struct {
|
||||
w *gzip.Writer
|
||||
}
|
||||
|
||||
func NewGzipWriter(w io.Writer, level int) *GzipWriter {
|
||||
if level <= 0 {
|
||||
level = gzip.DefaultCompression
|
||||
}
|
||||
gw, _ := gzip.NewWriterLevel(w, level)
|
||||
return &GzipWriter{w: gw}
|
||||
}
|
||||
|
||||
func (g *GzipWriter) Write(p []byte) (int, error) {
|
||||
return g.w.Write(p)
|
||||
}
|
||||
|
||||
func (g *GzipWriter) Close() error {
|
||||
return g.w.Close()
|
||||
}
|
||||
|
||||
// GzipReader is a helper for gzip decompression
|
||||
type GzipReader struct {
|
||||
r *gzip.Reader
|
||||
}
|
||||
|
||||
func NewGzipReader(r io.Reader) (*GzipReader, error) {
|
||||
gr, err := gzip.NewReader(r)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &GzipReader{r: gr}, nil
|
||||
}
|
||||
|
||||
func (g *GzipReader) Read(p []byte) (int, error) {
|
||||
return g.r.Read(p)
|
||||
}
|
||||
|
||||
func (g *GzipReader) Close() error {
|
||||
return g.r.Close()
|
||||
}
|
||||
|
||||
// ExtractBinlogPositionFromDump extracts the binlog position from a mysqldump file
|
||||
func ExtractBinlogPositionFromDump(dumpPath string) (*BinlogPosition, error) {
|
||||
file, err := os.Open(dumpPath)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("opening dump file: %w", err)
|
||||
}
|
||||
defer file.Close()
|
||||
|
||||
var reader io.Reader = file
|
||||
if strings.HasSuffix(dumpPath, ".gz") {
|
||||
gzReader, err := gzip.NewReader(file)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("creating gzip reader: %w", err)
|
||||
}
|
||||
defer gzReader.Close()
|
||||
reader = gzReader
|
||||
}
|
||||
|
||||
// Look for CHANGE MASTER TO or -- CHANGE MASTER TO comment
|
||||
// Pattern: -- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000042', MASTER_LOG_POS=1234;
|
||||
scanner := NewLimitedScanner(reader, 1000) // Only scan first 1000 lines
|
||||
posPattern := regexp.MustCompile(`MASTER_LOG_FILE='([^']+)',\s*MASTER_LOG_POS=(\d+)`)
|
||||
|
||||
for scanner.Scan() {
|
||||
line := scanner.Text()
|
||||
if matches := posPattern.FindStringSubmatch(line); len(matches) == 3 {
|
||||
pos, _ := strconv.ParseUint(matches[2], 10, 64)
|
||||
return &BinlogPosition{
|
||||
File: matches[1],
|
||||
Position: pos,
|
||||
}, nil
|
||||
}
|
||||
}
|
||||
|
||||
return nil, fmt.Errorf("binlog position not found in dump file")
|
||||
}
|
||||
|
||||
// LimitedScanner wraps bufio.Scanner with a line limit
|
||||
type LimitedScanner struct {
|
||||
scanner *bufio.Scanner
|
||||
limit int
|
||||
count int
|
||||
}
|
||||
|
||||
func NewLimitedScanner(r io.Reader, limit int) *LimitedScanner {
|
||||
return &LimitedScanner{
|
||||
scanner: bufio.NewScanner(r),
|
||||
limit: limit,
|
||||
}
|
||||
}
|
||||
|
||||
func (s *LimitedScanner) Scan() bool {
|
||||
if s.count >= s.limit {
|
||||
return false
|
||||
}
|
||||
s.count++
|
||||
return s.scanner.Scan()
|
||||
}
|
||||
|
||||
func (s *LimitedScanner) Text() string {
|
||||
return s.scanner.Text()
|
||||
}
|
||||
Reference in New Issue
Block a user