frostfs-node/pkg/local_object_storage/shard/control.go

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package shard
import (
"errors"
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor"
meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"go.uber.org/zap"
)
func (s *Shard) handleMetabaseFailure(stage string, err error) error {
s.log.Error("metabase failure, switching mode",
zap.String("stage", stage),
zap.Stringer("mode", mode.ReadOnly),
zap.Error(err))
err = s.SetMode(mode.ReadOnly)
if err == nil {
return nil
}
s.log.Error("can't move shard to readonly, switch mode",
zap.String("stage", stage),
zap.Stringer("mode", mode.DegradedReadOnly),
zap.Error(err))
err = s.SetMode(mode.DegradedReadOnly)
if err != nil {
return fmt.Errorf("could not switch to mode %s", mode.DegradedReadOnly)
}
return nil
}
// Open opens all Shard's components.
func (s *Shard) Open() error {
components := []interface{ Open(bool) error }{
s.blobStor, s.metaBase,
}
if s.hasWriteCache() {
components = append(components, s.writeCache)
}
if s.pilorama != nil {
components = append(components, s.pilorama)
}
for i, component := range components {
if err := component.Open(false); err != nil {
if component == s.metaBase {
// We must first open all other components to avoid
// opening non-existent DB in read-only mode.
for j := i + 1; j < len(components); j++ {
if err := components[j].Open(false); err != nil {
// Other components must be opened, fail.
return fmt.Errorf("could not open %T: %w", components[j], err)
}
}
err = s.handleMetabaseFailure("open", err)
if err != nil {
return err
}
break
}
return fmt.Errorf("could not open %T: %w", component, err)
}
}
return nil
}
type metabaseSynchronizer Shard
func (x *metabaseSynchronizer) Init() error {
return (*Shard)(x).refillMetabase()
}
// Init initializes all Shard's components.
func (s *Shard) Init() error {
type initializer interface {
Init() error
}
var components []initializer
if !s.GetMode().NoMetabase() {
var initMetabase initializer
if s.needRefillMetabase() {
initMetabase = (*metabaseSynchronizer)(s)
} else {
initMetabase = s.metaBase
}
components = []initializer{
s.blobStor, initMetabase,
}
} else {
components = []initializer{s.blobStor}
}
if s.hasWriteCache() {
components = append(components, s.writeCache)
}
if s.pilorama != nil {
components = append(components, s.pilorama)
}
for _, component := range components {
if err := component.Init(); err != nil {
if component == s.metaBase {
if errors.Is(err, meta.ErrOutdatedVersion) {
return fmt.Errorf("metabase initialization: %w", err)
}
err = s.handleMetabaseFailure("init", err)
if err != nil {
return err
}
break
}
return fmt.Errorf("could not initialize %T: %w", component, err)
}
}
s.updateMetrics()
s.gc = &gc{
gcCfg: &s.gcCfg,
remover: s.removeGarbage,
stopChannel: make(chan struct{}),
eventChan: make(chan Event),
mEventHandler: map[eventType]*eventHandlers{
eventNewEpoch: {
cancelFunc: func() {},
handlers: []eventHandler{
s.collectExpiredLocksAndObjects,
s.collectExpiredTombstones,
},
},
},
}
s.gc.init()
return nil
}
func (s *Shard) refillMetabase() error {
err := s.metaBase.Reset()
if err != nil {
return fmt.Errorf("could not reset metabase: %w", err)
}
obj := objectSDK.New()
err = blobstor.IterateBinaryObjects(s.blobStor, func(addr oid.Address, data []byte, descriptor []byte) error {
if err := obj.Unmarshal(data); err != nil {
s.log.Warn("could not unmarshal object",
zap.Stringer("address", addr),
zap.String("err", err.Error()))
return nil
}
var err error
switch obj.Type() {
case objectSDK.TypeTombstone:
err = s.refillTombstoneObject(obj)
case objectSDK.TypeLock:
err = s.refillLockObject(obj)
default:
}
if err != nil {
return err
}
var mPrm meta.PutPrm
mPrm.SetObject(obj)
mPrm.SetStorageID(descriptor)
_, err = s.metaBase.Put(mPrm)
if err != nil && !meta.IsErrRemoved(err) && !errors.Is(err, meta.ErrObjectIsExpired) {
return err
}
return nil
})
if err != nil {
return fmt.Errorf("could not put objects to the meta: %w", err)
}
err = s.metaBase.SyncCounters()
if err != nil {
return fmt.Errorf("could not sync object counters: %w", err)
}
return nil
}
func (s *Shard) refillLockObject(obj *objectSDK.Object) error {
var lock objectSDK.Lock
if err := lock.Unmarshal(obj.Payload()); err != nil {
return fmt.Errorf("could not unmarshal lock content: %w", err)
}
locked := make([]oid.ID, lock.NumberOfMembers())
lock.ReadMembers(locked)
cnr, _ := obj.ContainerID()
id, _ := obj.ID()
err := s.metaBase.Lock(cnr, id, locked)
if err != nil {
return fmt.Errorf("could not lock objects: %w", err)
}
return nil
}
func (s *Shard) refillTombstoneObject(obj *objectSDK.Object) error {
tombstone := objectSDK.NewTombstone()
if err := tombstone.Unmarshal(obj.Payload()); err != nil {
return fmt.Errorf("could not unmarshal tombstone content: %w", err)
}
tombAddr := object.AddressOf(obj)
memberIDs := tombstone.Members()
tombMembers := make([]oid.Address, 0, len(memberIDs))
for i := range memberIDs {
a := tombAddr
a.SetObject(memberIDs[i])
tombMembers = append(tombMembers, a)
}
var inhumePrm meta.InhumePrm
inhumePrm.SetTombstoneAddress(tombAddr)
inhumePrm.SetAddresses(tombMembers...)
_, err := s.metaBase.Inhume(inhumePrm)
if err != nil {
return fmt.Errorf("could not inhume objects: %w", err)
}
return nil
}
// Close releases all Shard's components.
func (s *Shard) Close() error {
components := []interface{ Close() error }{}
if s.pilorama != nil {
components = append(components, s.pilorama)
}
if s.hasWriteCache() {
components = append(components, s.writeCache)
}
components = append(components, s.blobStor, s.metaBase)
var lastErr error
for _, component := range components {
if err := component.Close(); err != nil {
lastErr = err
s.log.Error("could not close shard component", zap.Error(err))
}
}
// If Init/Open was unsuccessful gc can be nil.
if s.gc != nil {
s.gc.stop()
}
return lastErr
}
// Reload reloads configuration portions that are necessary.
// If a config option is invalid, it logs an error and returns nil.
// If there was a problem with applying new configuration, an error is returned.
func (s *Shard) Reload(opts ...Option) error {
// Do not use defaultCfg here missing options need not be reloaded.
var c cfg
for i := range opts {
opts[i](&c)
}
s.m.Lock()
defer s.m.Unlock()
ok, err := s.metaBase.Reload(c.metaOpts...)
if err != nil {
if errors.Is(err, meta.ErrDegradedMode) {
s.log.Error("can't open metabase, move to a degraded mode", zap.Error(err))
_ = s.setMode(mode.DegradedReadOnly)
}
return err
}
if ok {
var err error
if c.refillMetabase {
// Here we refill metabase only if a new instance was opened. This is a feature,
// we don't want to hang for some time just because we forgot to change
// config after the node was updated.
err = s.refillMetabase()
} else {
err = s.metaBase.Init()
}
if err != nil {
s.log.Error("can't initialize metabase, move to a degraded-read-only mode", zap.Error(err))
_ = s.setMode(mode.DegradedReadOnly)
return err
}
}
s.log.Info("trying to restore read-write mode")
return s.setMode(mode.ReadWrite)
}