mirror of https://github.com/coder/coder.git
100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
package dbpurge
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"time"
|
|
|
|
"golang.org/x/xerrors"
|
|
|
|
"cdr.dev/slog"
|
|
|
|
"github.com/coder/coder/v2/coderd/database"
|
|
"github.com/coder/coder/v2/coderd/database/dbauthz"
|
|
)
|
|
|
|
const (
|
|
delay = 10 * time.Minute
|
|
)
|
|
|
|
// New creates a new periodically purging database instance.
|
|
// It is the caller's responsibility to call Close on the returned instance.
|
|
//
|
|
// This is for cleaning up old, unused resources from the database that take up space.
|
|
func New(ctx context.Context, logger slog.Logger, db database.Store) io.Closer {
|
|
closed := make(chan struct{})
|
|
|
|
ctx, cancelFunc := context.WithCancel(ctx)
|
|
//nolint:gocritic // The system purges old db records without user input.
|
|
ctx = dbauthz.AsSystemRestricted(ctx)
|
|
|
|
// Use time.Nanosecond to force an initial tick. It will be reset to the
|
|
// correct duration after executing once.
|
|
ticker := time.NewTicker(time.Nanosecond)
|
|
doTick := func() {
|
|
defer ticker.Reset(delay)
|
|
|
|
start := time.Now()
|
|
// Start a transaction to grab advisory lock, we don't want to run
|
|
// multiple purges at the same time (multiple replicas).
|
|
if err := db.InTx(func(tx database.Store) error {
|
|
// Acquire a lock to ensure that only one instance of the
|
|
// purge is running at a time.
|
|
ok, err := tx.TryAcquireLock(ctx, database.LockIDDBPurge)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !ok {
|
|
logger.Debug(ctx, "unable to acquire lock for purging old database entries, skipping")
|
|
return nil
|
|
}
|
|
|
|
if err := tx.DeleteOldWorkspaceAgentLogs(ctx); err != nil {
|
|
return xerrors.Errorf("failed to delete old workspace agent logs: %w", err)
|
|
}
|
|
if err := tx.DeleteOldWorkspaceAgentStats(ctx); err != nil {
|
|
return xerrors.Errorf("failed to delete old workspace agent stats: %w", err)
|
|
}
|
|
if err := tx.DeleteOldProvisionerDaemons(ctx); err != nil {
|
|
return xerrors.Errorf("failed to delete old provisioner daemons: %w", err)
|
|
}
|
|
|
|
logger.Info(ctx, "purged old database entries", slog.F("duration", time.Since(start)))
|
|
|
|
return nil
|
|
}, nil); err != nil {
|
|
logger.Error(ctx, "failed to purge old database entries", slog.Error(err))
|
|
return
|
|
}
|
|
}
|
|
|
|
go func() {
|
|
defer close(closed)
|
|
defer ticker.Stop()
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case <-ticker.C:
|
|
ticker.Stop()
|
|
doTick()
|
|
}
|
|
}
|
|
}()
|
|
return &instance{
|
|
cancel: cancelFunc,
|
|
closed: closed,
|
|
}
|
|
}
|
|
|
|
type instance struct {
|
|
cancel context.CancelFunc
|
|
closed chan struct{}
|
|
}
|
|
|
|
func (i *instance) Close() error {
|
|
i.cancel()
|
|
<-i.closed
|
|
return nil
|
|
}
|