forked from TrueCloudLab/frostfs-node
136 lines
2.8 KiB
Go
136 lines
2.8 KiB
Go
package engine
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import (
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"sync"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
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"github.com/nspcc-dev/neofs-node/pkg/util"
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"github.com/nspcc-dev/neofs-node/pkg/util/logger"
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"go.uber.org/atomic"
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"go.uber.org/zap"
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)
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// StorageEngine represents NeoFS local storage engine.
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type StorageEngine struct {
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*cfg
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mtx *sync.RWMutex
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shards map[string]shardWrapper
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shardPools map[string]util.WorkerPool
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blockExec struct {
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mtx sync.RWMutex
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err error
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}
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}
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type shardWrapper struct {
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metaErrorCount *atomic.Uint32
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writeErrorCount *atomic.Uint32
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*shard.Shard
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}
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// reportShardError checks that the amount of errors doesn't exceed the configured threshold.
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// If it does, shard is set to read-only mode.
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func (e *StorageEngine) reportShardError(
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sh hashedShard,
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errorCount *atomic.Uint32,
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msg string,
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err error,
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fields ...zap.Field) {
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errCount := errorCount.Inc()
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e.log.Warn(msg, append([]zap.Field{
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zap.Stringer("shard_id", sh.ID()),
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zap.Uint32("error count", errCount),
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zap.String("error", err.Error()),
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}, fields...)...)
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if e.errorsThreshold == 0 || errCount < e.errorsThreshold {
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return
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}
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if errorCount == sh.writeErrorCount {
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err = sh.SetMode(sh.GetMode() | shard.ModeReadOnly)
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} else {
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err = sh.SetMode(sh.GetMode() | shard.ModeDegraded)
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}
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if err != nil {
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e.log.Error("failed to move shard in degraded mode",
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zap.Uint32("error count", errCount),
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zap.Error(err))
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} else {
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e.log.Info("shard is moved in degraded mode due to error threshold",
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zap.Stringer("shard_id", sh.ID()),
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zap.Uint32("error count", errCount))
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}
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}
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// Option represents StorageEngine's constructor option.
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type Option func(*cfg)
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type cfg struct {
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log *logger.Logger
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errorsThreshold uint32
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metrics MetricRegister
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shardPoolSize uint32
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}
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func defaultCfg() *cfg {
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return &cfg{
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log: zap.L(),
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shardPoolSize: 20,
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}
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}
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// New creates, initializes and returns new StorageEngine instance.
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func New(opts ...Option) *StorageEngine {
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c := defaultCfg()
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for i := range opts {
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opts[i](c)
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}
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return &StorageEngine{
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cfg: c,
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mtx: new(sync.RWMutex),
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shards: make(map[string]shardWrapper),
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shardPools: make(map[string]util.WorkerPool),
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}
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}
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// WithLogger returns option to set StorageEngine's logger.
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func WithLogger(l *logger.Logger) Option {
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return func(c *cfg) {
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c.log = l
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}
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}
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func WithMetrics(v MetricRegister) Option {
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return func(c *cfg) {
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c.metrics = v
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}
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}
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// WithShardPoolSize returns option to specify size of worker pool for each shard.
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func WithShardPoolSize(sz uint32) Option {
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return func(c *cfg) {
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c.shardPoolSize = sz
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}
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}
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// WithErrorThreshold returns an option to specify size amount of errors after which
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// shard is moved to read-only mode.
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func WithErrorThreshold(sz uint32) Option {
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return func(c *cfg) {
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if sz != 0 {
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c.errorsThreshold = sz
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}
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}
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}
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