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
|
||||
}
|
||||
Reference in New Issue
Block a user