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package database
import (
"database/sql"
"log"
"time"
"github.com/robfig/cron/v3"
)
// CleanupMetrics deletes metrics older than the retention period
func CleanupMetrics(db *sql.DB, retentionDays int) error {
cutoffDate := time.Now().AddDate(0, 0, -retentionDays)
cutoffDateStr := cutoffDate.UTC().Format(time.RFC3339Nano)
containerQuery := `DELETE FROM container_metrics WHERE timestamp < ?`
_, err := db.Exec(containerQuery, cutoffDateStr)
if err != nil {
return err
}
serverQuery := `DELETE FROM server_metrics WHERE timestamp < ?`
_, err = db.Exec(serverQuery, cutoffDateStr)
if err != nil {
return err
}
log.Printf("Metrics deleted (older than %d days)", retentionDays)
log.Printf("Cutoff date for both tables: %s", cutoffDateStr)
return nil
}
// StartMetricsCleanup starts a cron job to periodically clean up metrics
func StartMetricsCleanup(db *sql.DB, retentionDays int, cronExpression string) (*cron.Cron, error) {
c := cron.New()
_, err := c.AddFunc(cronExpression, func() {
if err := CleanupMetrics(db, retentionDays); err != nil {
log.Printf("Error during metrics cleanup: %v", err)
}
})
if err != nil {
return nil, err
}
c.Start()
log.Printf("Started metrics cleanup job (retention: %d days, cron: %s)",
retentionDays, cronExpression)
return c, nil
}
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