138 lines
3.5 KiB
Go
138 lines
3.5 KiB
Go
// Package retention provides the retention policy enforcement service.
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package retention // import "github.com/influxdata/influxdb/services/retention"
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import (
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"fmt"
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"sync"
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"time"
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"github.com/influxdata/influxdb/services/meta"
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"github.com/uber-go/zap"
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)
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// Service represents the retention policy enforcement service.
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type Service struct {
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MetaClient interface {
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Databases() []meta.DatabaseInfo
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DeleteShardGroup(database, policy string, id uint64) error
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PruneShardGroups() error
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}
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TSDBStore interface {
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ShardIDs() []uint64
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DeleteShard(shardID uint64) error
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}
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checkInterval time.Duration
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wg sync.WaitGroup
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done chan struct{}
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logger zap.Logger
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}
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// NewService returns a configured retention policy enforcement service.
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func NewService(c Config) *Service {
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return &Service{
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checkInterval: time.Duration(c.CheckInterval),
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done: make(chan struct{}),
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logger: zap.New(zap.NullEncoder()),
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}
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}
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// Open starts retention policy enforcement.
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func (s *Service) Open() error {
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s.logger.Info(fmt.Sprint("Starting retention policy enforcement service with check interval of ", s.checkInterval))
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s.wg.Add(2)
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go s.deleteShardGroups()
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go s.deleteShards()
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return nil
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}
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// Close stops retention policy enforcement.
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func (s *Service) Close() error {
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s.logger.Info("retention policy enforcement terminating")
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close(s.done)
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s.wg.Wait()
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return nil
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}
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// WithLogger sets the logger on the service.
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func (s *Service) WithLogger(log zap.Logger) {
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s.logger = log.With(zap.String("service", "retention"))
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}
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func (s *Service) deleteShardGroups() {
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defer s.wg.Done()
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ticker := time.NewTicker(s.checkInterval)
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defer ticker.Stop()
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for {
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select {
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case <-s.done:
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return
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case <-ticker.C:
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dbs := s.MetaClient.Databases()
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for _, d := range dbs {
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for _, r := range d.RetentionPolicies {
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for _, g := range r.ExpiredShardGroups(time.Now().UTC()) {
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if err := s.MetaClient.DeleteShardGroup(d.Name, r.Name, g.ID); err != nil {
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s.logger.Info(fmt.Sprintf("failed to delete shard group %d from database %s, retention policy %s: %s",
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g.ID, d.Name, r.Name, err.Error()))
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} else {
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s.logger.Info(fmt.Sprintf("deleted shard group %d from database %s, retention policy %s",
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g.ID, d.Name, r.Name))
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}
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}
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}
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}
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}
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}
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}
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func (s *Service) deleteShards() {
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defer s.wg.Done()
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ticker := time.NewTicker(s.checkInterval)
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defer ticker.Stop()
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for {
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select {
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case <-s.done:
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return
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case <-ticker.C:
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s.logger.Info("retention policy shard deletion check commencing")
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type deletionInfo struct {
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db string
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rp string
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}
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deletedShardIDs := make(map[uint64]deletionInfo, 0)
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dbs := s.MetaClient.Databases()
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for _, d := range dbs {
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for _, r := range d.RetentionPolicies {
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for _, g := range r.DeletedShardGroups() {
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for _, sh := range g.Shards {
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deletedShardIDs[sh.ID] = deletionInfo{db: d.Name, rp: r.Name}
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}
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}
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}
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}
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for _, id := range s.TSDBStore.ShardIDs() {
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if info, ok := deletedShardIDs[id]; ok {
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if err := s.TSDBStore.DeleteShard(id); err != nil {
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s.logger.Error(fmt.Sprintf("failed to delete shard ID %d from database %s, retention policy %s: %s",
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id, info.db, info.rp, err.Error()))
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continue
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}
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s.logger.Info(fmt.Sprintf("shard ID %d from database %s, retention policy %s, deleted",
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id, info.db, info.rp))
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}
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}
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if err := s.MetaClient.PruneShardGroups(); err != nil {
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s.logger.Info(fmt.Sprintf("error pruning shard groups: %s", err))
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}
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}
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}
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}
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