chunk

package
v3.0.1 Latest Latest
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 Go to latest Published: Mar 21, 2022 License: AGPL-3.0 Imports: 50 Imported by: 0

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Index

Constants

View Source 
const (
	ErrInvalidChecksum = errs.Error("invalid chunk checksum")
	ErrWrongMetadata   = errs.Error("wrong chunk metadata")
	ErrMetadataLength  = errs.Error("chunk metadata wrong length")
	ErrDataLength      = errs.Error("chunk data wrong length")
	ErrSliceOutOfRange = errs.Error("chunk can't be sliced out of its data range")
)
View Source 
const (
	MockStorageModeReadWrite = 0
	MockStorageModeReadOnly  = 1
	MockStorageModeWriteOnly = 2
)

Variables

View Source 
var (
	ErrQueryMustContainMetricName = QueryError("query must contain metric name")
	ErrMetricNameLabelMissing     = errors.New("metric name label missing")
	ErrParialDeleteChunkNoOverlap = errors.New("interval for partial deletion has not overlap with chunk interval")
)
View Source 
var (
	// ErrMethodNotImplemented when any of the storage clients do not implement a method
	ErrMethodNotImplemented = errors.New("method is not implemented")
	// ErrStorageObjectNotFound when object storage does not have requested object
	ErrStorageObjectNotFound = errors.New("object not found in storage")
)
View Source 
var BenchmarkLabels = labels.Labels{
	{Name: model.MetricNameLabel, Value: "container_cpu_usage_seconds_total"},
	{Name: "beta_kubernetes_io_arch", Value: "amd64"},
	{Name: "beta_kubernetes_io_instance_type", Value: "c3.somesize"},
	{Name: "beta_kubernetes_io_os", Value: "linux"},
	{Name: "container_name", Value: "some-name"},
	{Name: "cpu", Value: "cpu01"},
	{Name: "failure_domain_beta_kubernetes_io_region", Value: "somewhere-1"},
	{Name: "failure_domain_beta_kubernetes_io_zone", Value: "somewhere-1b"},
	{Name: "id", Value: "/kubepods/burstable/pod6e91c467-e4c5-11e7-ace3-0a97ed59c75e/a3c8498918bd6866349fed5a6f8c643b77c91836427fb6327913276ebc6bde28"},
	{Name: "image", Value: "registry/organisation/name@sha256:dca3d877a80008b45d71d7edc4fd2e44c0c8c8e7102ba5cbabec63a374d1d506"},
	{Name: "instance", Value: "ip-111-11-1-11.ec2.internal"},
	{Name: "job", Value: "kubernetes-cadvisor"},
	{Name: "kubernetes_io_hostname", Value: "ip-111-11-1-11"},
	{Name: "monitor", Value: "prod"},
	{Name: "name", Value: "k8s_some-name_some-other-name-5j8s8_kube-system_6e91c467-e4c5-11e7-ace3-0a97ed59c75e_0"},
	{Name: "namespace", Value: "kube-system"},
	{Name: "pod_name", Value: "some-other-name-5j8s8"},
}

BenchmarkLabels is a real example from Kubernetes' embedded cAdvisor metrics, lightly obfuscated

View Source 
var (
	// ErrNotSupported when a schema doesn't support that particular lookup.
	ErrNotSupported = errors.New("not supported")
)

Functions

func ChunksToMatrix 

func ChunksToMatrix(ctx context.Context, chunks []Chunk, from, through model.Time) (model.Matrix, error)

ChunksToMatrix converts a set of chunks to a model.Matrix.

func ExpectTables 

func ExpectTables(ctx context.Context, client TableClient, expected []TableDesc) error

ExpectTables compares existing tables to an expected set of tables. Exposed for testing,

func FindSetMatches 

func FindSetMatches(pattern string) []string

FindSetMatches returns list of values that can be equality matched on. copied from Prometheus querier.go, removed check for Prometheus wrapper.

Types

type ActiveTableProvisionConfig 

type ActiveTableProvisionConfig struct {
	ProvisionedThroughputOnDemandMode bool  `yaml:"enable_ondemand_throughput_mode"`
	ProvisionedWriteThroughput        int64 `yaml:"provisioned_write_throughput"`
	ProvisionedReadThroughput         int64 `yaml:"provisioned_read_throughput"`

	WriteScale AutoScalingConfig `yaml:"write_scale"`
	ReadScale  AutoScalingConfig `yaml:"read_scale"`
}

func (ActiveTableProvisionConfig) BuildTableDesc 

func (cfg ActiveTableProvisionConfig) BuildTableDesc(tableName string, tags Tags) TableDesc

func (*ActiveTableProvisionConfig) RegisterFlags 

func (cfg *ActiveTableProvisionConfig) RegisterFlags(argPrefix string, f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet. Make sure defaults are set in the respective fields before calling RegisterFlags.

type AutoScalingConfig 

type AutoScalingConfig struct {
	Enabled     bool    `yaml:"enabled"`
	RoleARN     string  `yaml:"role_arn"`
	MinCapacity int64   `yaml:"min_capacity"`
	MaxCapacity int64   `yaml:"max_capacity"`
	OutCooldown int64   `yaml:"out_cooldown"`
	InCooldown  int64   `yaml:"in_cooldown"`
	TargetValue float64 `yaml:"target"`
}

AutoScalingConfig for DynamoDB tables.

func (*AutoScalingConfig) RegisterFlags 

func (cfg *AutoScalingConfig) RegisterFlags(argPrefix string, f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet.

type BaseSchema 

type BaseSchema interface {
	// When doing a read, use these methods to return the list of entries you should query
	GetReadQueriesForMetric(from, through model.Time, userID string, metricName string) ([]IndexQuery, error)
	GetReadQueriesForMetricLabel(from, through model.Time, userID string, metricName string, labelName string) ([]IndexQuery, error)
	GetReadQueriesForMetricLabelValue(from, through model.Time, userID string, metricName string, labelName string, labelValue string) ([]IndexQuery, error)
	FilterReadQueries(queries []IndexQuery, shard *astmapper.ShardAnnotation) []IndexQuery
}

BasicSchema has operation shared between StoreSchema and SeriesStoreSchema

type Bucket 

type Bucket struct {
	// contains filtered or unexported fields
}

Bucket describes a range of time with a tableName and hashKey

type BucketClient 

type BucketClient interface {
	DeleteChunksBefore(ctx context.Context, ts time.Time) error
}

BucketClient is used to enforce retention on chunk buckets.

type CacheGenNumLoader 

type CacheGenNumLoader interface {
	GetStoreCacheGenNumber(tenantIDs []string) string
}

type CardinalityExceededError 

type CardinalityExceededError struct {
	MetricName, LabelName string
	Size, Limit           int32
}

CardinalityExceededError is returned when the user reads a row that is too large.

func (CardinalityExceededError) Error 

func (e CardinalityExceededError) Error() string

type Chunk 

type Chunk struct {
	logproto.ChunkRef

	Metric labels.Labels `json:"metric"`

	// For old chunks, ChecksumSet will be false.
	ChecksumSet bool `json:"-"`

	// We never use Delta encoding (the zero value), so if this entry is
	// missing, we default to DoubleDelta.
	Encoding prom_chunk.Encoding `json:"encoding"`
	Data     prom_chunk.Chunk    `json:"-"`
	// contains filtered or unexported fields
}

Chunk contains encoded timeseries data

func NewChunk 

func NewChunk(userID string, fp model.Fingerprint, metric labels.Labels, c prom_chunk.Chunk, from, through model.Time) Chunk

NewChunk creates a new chunk

func ParseExternalKey 

func ParseExternalKey(userID, externalKey string) (Chunk, error)

ParseExternalKey is used to construct a partially-populated chunk from the key in DynamoDB. This chunk can then be used to calculate the key needed to fetch the Chunk data from Memcache/S3, and then fully populate the chunk with decode().

Pre-checksums, the keys written to DynamoDB looked like `<fingerprint>:<start time>:<end time>` (aka the ID), and the key for memcache and S3 was `<user id>/<fingerprint>:<start time>:<end time>. Finger prints and times were written in base-10.

Post-checksums, externals keys become the same across DynamoDB, Memcache and S3. Numbers become hex encoded. Keys look like: `<user id>/<fingerprint>:<start time>:<end time>:<checksum>`.

v12+, fingerprint is now a prefix to support better read and write request parallelization: `<user>/<fprint>/<start>:<end>:<checksum>`

func (*Chunk) Decode 

func (c *Chunk) Decode(decodeContext *DecodeContext, input []byte) error

Decode the chunk from the given buffer, and confirm the chunk is the one we expected.

func (*Chunk) Encode 

func (c *Chunk) Encode() error

Encode writes the chunk into a buffer, and calculates the checksum.

func (*Chunk) EncodeTo 

func (c *Chunk) EncodeTo(buf *bytes.Buffer) error

EncodeTo is like Encode but you can provide your own buffer to use.

func (*Chunk) Encoded 

func (c *Chunk) Encoded() ([]byte, error)

Encoded returns the buffer created by Encoded()

func (*Chunk) Samples 

func (c *Chunk) Samples(from, through model.Time) ([]model.SamplePair, error)

Samples returns all SamplePairs for the chunk.

func (*Chunk) Slice 

func (c *Chunk) Slice(from, through model.Time) (*Chunk, error)

Slice builds a new smaller chunk with data only from given time range (inclusive)

type Client 

type Client interface {
	Stop()

	PutChunks(ctx context.Context, chunks []Chunk) error
	GetChunks(ctx context.Context, chunks []Chunk) ([]Chunk, error)
	DeleteChunk(ctx context.Context, userID, chunkID string) error
	IsChunkNotFoundErr(err error) bool
}

Client is for storing and retrieving chunks.

type CompositeStore 

type CompositeStore struct {
	// contains filtered or unexported fields
}

CompositeStore is a Store which delegates to various stores depending on when they were activated.

func NewCompositeStore 

func NewCompositeStore(cacheGenNumLoader CacheGenNumLoader) CompositeStore

NewCompositeStore creates a new Store which delegates to different stores depending on time.

func (*CompositeStore) AddPeriod 

func (c *CompositeStore) AddPeriod(storeCfg StoreConfig, cfg PeriodConfig, index IndexClient, chunks Client, limits StoreLimits, chunksCache, writeDedupeCache cache.Cache) error

AddPeriod adds the configuration for a period of time to the CompositeStore

func (CompositeStore) GetChunkFetcher 

func (c CompositeStore) GetChunkFetcher(tm model.Time) *Fetcher

func (CompositeStore) GetChunkRefs 

func (c CompositeStore) GetChunkRefs(ctx context.Context, userID string, from, through model.Time, matchers ...*labels.Matcher) ([][]Chunk, []*Fetcher, error)

func (CompositeStore) LabelNamesForMetricName 

func (c CompositeStore) LabelNamesForMetricName(ctx context.Context, userID string, from, through model.Time, metricName string) ([]string, error)

LabelNamesForMetricName retrieves all label names for a metric name.

func (CompositeStore) LabelValuesForMetricName 

func (c CompositeStore) LabelValuesForMetricName(ctx context.Context, userID string, from, through model.Time, metricName string, labelName string, matchers ...*labels.Matcher) ([]string, error)

LabelValuesForMetricName retrieves all label values for a single label name and metric name.

func (CompositeStore) Put 

func (c CompositeStore) Put(ctx context.Context, chunks []Chunk) error

func (CompositeStore) PutOne 

func (c CompositeStore) PutOne(ctx context.Context, from, through model.Time, chunk Chunk) error

func (CompositeStore) Stop 

func (c CompositeStore) Stop()

type DayTime 

type DayTime struct {
	model.Time
}

DayTime is a model.Time what holds day-aligned values, and marshals to/from YAML in YYYY-MM-DD format.

func (DayTime) MarshalYAML 

func (d DayTime) MarshalYAML() (interface{}, error)

MarshalYAML implements yaml.Marshaller.

func (*DayTime) String 

func (d *DayTime) String() string

func (*DayTime) UnmarshalYAML 

func (d *DayTime) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements yaml.Unmarshaller.

type DecodeContext 

type DecodeContext struct {
	// contains filtered or unexported fields
}

DecodeContext holds data that can be re-used between decodes of different chunks

func NewDecodeContext 

func NewDecodeContext() *DecodeContext

NewDecodeContext creates a new, blank, DecodeContext

type ExtraTables 

type ExtraTables struct {
	TableClient TableClient
	Tables      []TableDesc
}

ExtraTables holds the list of tables that TableManager has to manage using a TableClient. This is useful for managing tables other than Chunk and Index tables.

type Fetcher 

type Fetcher struct {
	// contains filtered or unexported fields
}

Fetcher deals with fetching chunk contents from the cache/store, and writing back any misses to the cache. Also responsible for decoding chunks from the cache, in parallel.

func NewChunkFetcher 

func NewChunkFetcher(cacher cache.Cache, cacheStubs bool, schema SchemaConfig, storage Client, maxAsyncConcurrency int, maxAsyncBufferSize int) (*Fetcher, error)

NewChunkFetcher makes a new ChunkFetcher.

func (*Fetcher) FetchChunks 

func (c *Fetcher) FetchChunks(ctx context.Context, chunks []Chunk, keys []string) ([]Chunk, error)

FetchChunks fetches a set of chunks from cache and store. Note that the keys passed in must be lexicographically sorted, while the returned chunks are not in the same order as the passed in chunks.

func (*Fetcher) IsChunkNotFoundErr 

func (c *Fetcher) IsChunkNotFoundErr(err error) bool

func (*Fetcher) Stop 

func (c *Fetcher) Stop()

Stop the ChunkFetcher.

type InactiveTableProvisionConfig 

type InactiveTableProvisionConfig struct {
	InactiveThroughputOnDemandMode bool  `yaml:"enable_inactive_throughput_on_demand_mode"`
	InactiveWriteThroughput        int64 `yaml:"inactive_write_throughput"`
	InactiveReadThroughput         int64 `yaml:"inactive_read_throughput"`

	InactiveWriteScale AutoScalingConfig `yaml:"inactive_write_scale"`
	InactiveReadScale  AutoScalingConfig `yaml:"inactive_read_scale"`

	InactiveWriteScaleLastN int64 `yaml:"inactive_write_scale_lastn"`
	InactiveReadScaleLastN  int64 `yaml:"inactive_read_scale_lastn"`
}

func (InactiveTableProvisionConfig) BuildTableDesc 

func (cfg InactiveTableProvisionConfig) BuildTableDesc(tableName string, tags Tags, disableAutoscale bool) TableDesc

func (*InactiveTableProvisionConfig) RegisterFlags 

func (cfg *InactiveTableProvisionConfig) RegisterFlags(argPrefix string, f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet.

type IndexClient 

type IndexClient interface {
	Stop()

	// For the write path.
	NewWriteBatch() WriteBatch
	BatchWrite(context.Context, WriteBatch) error

	// For the read path.
	QueryPages(ctx context.Context, queries []IndexQuery, callback QueryPagesCallback) error
}

IndexClient is a client for the storage of the index (e.g. DynamoDB or Bigtable).

type IndexEntry 

type IndexEntry struct {
	TableName string
	HashValue string

	// For writes, RangeValue will always be set.
	RangeValue []byte

	// New for v6 schema, label value is not written as part of the range key.
	Value []byte
}

IndexEntry describes an entry in the chunk index

type IndexEntryProcessor 

type IndexEntryProcessor interface {
	ProcessIndexEntry(indexEntry IndexEntry) error

	// Will this user be accepted by the processor?
	AcceptUser(user string) bool

	// Called at the end of reading of index entries.
	Flush() error
}

IndexEntryProcessor receives index entries from a table.

type IndexQuery 

type IndexQuery struct {
	TableName string
	HashValue string

	// One of RangeValuePrefix or RangeValueStart might be set:
	// - If RangeValuePrefix is not nil, must read all keys with that prefix.
	// - If RangeValueStart is not nil, must read all keys from there onwards.
	// - If neither is set, must read all keys for that row.
	// RangeValueStart should only be used for querying Chunk IDs.
	// If this is going to change then please take care of func isChunksQuery in pkg/chunk/storage/caching_index_client.go which relies on it.
	RangeValuePrefix []byte
	RangeValueStart  []byte

	// Filters for querying
	ValueEqual []byte

	// If the result of this lookup is immutable or not (for caching).
	Immutable bool
}

IndexQuery describes a query for entries

type IndexReader 

type IndexReader interface {
	IndexTableNames(ctx context.Context) ([]string, error)

	// Reads a single table from index, and passes individual index entries to the processors.
	//
	// All entries with the same TableName, HashValue and RangeValue are passed to the same processor,
	// and all such entries (with different Values) are passed before index entries with different
	// values of HashValue and RangeValue are passed to the same processor.
	//
	// This allows IndexEntryProcessor to find when values for given Hash and Range finish:
	// as soon as new Hash and Range differ from last IndexEntry.
	//
	// Index entries passed to the same processor arrive sorted by HashValue and RangeValue.
	ReadIndexEntries(ctx context.Context, table string, processors []IndexEntryProcessor) error
}

IndexReader parses index entries and passes them to the IndexEntryProcessor.

type MockStorage 

type MockStorage struct {
	// contains filtered or unexported fields
}

MockStorage is a fake in-memory StorageClient.

func NewMockStorage 

func NewMockStorage() *MockStorage

NewMockStorage creates a new MockStorage.

func (*MockStorage) BatchWrite 

func (m *MockStorage) BatchWrite(ctx context.Context, batch WriteBatch) error

BatchWrite implements StorageClient.

func (*MockStorage) CreateTable 

func (m *MockStorage) CreateTable(_ context.Context, desc TableDesc) error

CreateTable implements StorageClient.

func (*MockStorage) DeleteChunk 

func (m *MockStorage) DeleteChunk(ctx context.Context, userID, chunkID string) error

DeleteChunk implements StorageClient.

func (*MockStorage) DeleteObject 

func (m *MockStorage) DeleteObject(ctx context.Context, objectKey string) error

func (*MockStorage) DeleteTable 

func (m *MockStorage) DeleteTable(_ context.Context, name string) error

DeleteTable implements StorageClient.

func (*MockStorage) DescribeTable 

func (m *MockStorage) DescribeTable(_ context.Context, name string) (desc TableDesc, isActive bool, err error)

DescribeTable implements StorageClient.

func (*MockStorage) GetChunks 

func (m *MockStorage) GetChunks(ctx context.Context, chunkSet []Chunk) ([]Chunk, error)

GetChunks implements StorageClient.

func (*MockStorage) GetObject 

func (m *MockStorage) GetObject(ctx context.Context, objectKey string) (io.ReadCloser, int64, error)

func (*MockStorage) GetObjectCount 

func (m *MockStorage) GetObjectCount() int

func (*MockStorage) GetSortedObjectKeys 

func (m *MockStorage) GetSortedObjectKeys() []string

func (*MockStorage) IsChunkNotFoundErr 

func (m *MockStorage) IsChunkNotFoundErr(err error) bool

func (*MockStorage) IsObjectNotFoundErr 

func (m *MockStorage) IsObjectNotFoundErr(err error) bool

func (*MockStorage) List 

func (m *MockStorage) List(ctx context.Context, prefix, delimiter string) ([]StorageObject, []StorageCommonPrefix, error)

List implements chunk.ObjectClient.

func (*MockStorage) ListTables 

func (m *MockStorage) ListTables(_ context.Context) ([]string, error)

ListTables implements StorageClient.

func (*MockStorage) NewWriteBatch 

func (m *MockStorage) NewWriteBatch() WriteBatch

NewWriteBatch implements StorageClient.

func (*MockStorage) PutChunks 

func (m *MockStorage) PutChunks(_ context.Context, chunks []Chunk) error

PutChunks implements StorageClient.

func (*MockStorage) PutObject 

func (m *MockStorage) PutObject(ctx context.Context, objectKey string, object io.ReadSeeker) error

func (*MockStorage) QueryPages 

func (m *MockStorage) QueryPages(ctx context.Context, queries []IndexQuery, callback QueryPagesCallback) error

QueryPages implements StorageClient.

func (*MockStorage) SetMode 

func (m *MockStorage) SetMode(mode MockStorageMode)

func (*MockStorage) Stop 

func (*MockStorage) Stop()

Stop doesn't do anything.

func (*MockStorage) UpdateTable 

func (m *MockStorage) UpdateTable(_ context.Context, _, desc TableDesc) error

UpdateTable implements StorageClient.

type MockStorageMode 

type MockStorageMode int

type ObjectAndIndexClient 

type ObjectAndIndexClient interface {
	PutChunksAndIndex(ctx context.Context, chunks []Chunk, index WriteBatch) error
}

ObjectAndIndexClient allows optimisations where the same client handles both

type ObjectClient 

type ObjectClient interface {
	PutObject(ctx context.Context, objectKey string, object io.ReadSeeker) error
	// NOTE: The consumer of GetObject should always call the Close method when it is done reading which otherwise could cause a resource leak.
	GetObject(ctx context.Context, objectKey string) (io.ReadCloser, int64, error)

	// List objects with given prefix.
	//
	// If delimiter is empty, all objects are returned, even if they are in nested in "subdirectories".
	// If delimiter is not empty, it is used to compute common prefixes ("subdirectories"),
	// and objects containing delimiter in the name will not be returned in the result.
	//
	// For example, if the prefix is "notes/" and the delimiter is a slash (/) as in "notes/summer/july", the common prefix is "notes/summer/".
	// Common prefixes will always end with passed delimiter.
	//
	// Keys of returned storage objects have given prefix.
	List(ctx context.Context, prefix string, delimiter string) ([]StorageObject, []StorageCommonPrefix, error)
	DeleteObject(ctx context.Context, objectKey string) error
	IsObjectNotFoundErr(err error) bool
	Stop()
}

ObjectClient is used to store arbitrary data in Object Store (S3/GCS/Azure/...)

type PeriodConfig 

type PeriodConfig struct {
	From        DayTime             `yaml:"from"`         // used when working with config
	IndexType   string              `yaml:"store"`        // type of index client to use.
	ObjectType  string              `yaml:"object_store"` // type of object client to use; if omitted, defaults to store.
	Schema      string              `yaml:"schema"`
	IndexTables PeriodicTableConfig `yaml:"index"`
	ChunkTables PeriodicTableConfig `yaml:"chunks"`
	RowShards   uint32              `yaml:"row_shards"`
	// contains filtered or unexported fields
}

PeriodConfig defines the schema and tables to use for a period of time

func (PeriodConfig) CreateSchema 

func (cfg PeriodConfig) CreateSchema() (BaseSchema, error)

CreateSchema returns the schema defined by the PeriodConfig

func (*PeriodConfig) UnmarshalYAML 

func (cfg *PeriodConfig) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements yaml.Unmarshaller.

func (*PeriodConfig) VersionAsInt 

func (cfg *PeriodConfig) VersionAsInt() (int, error)

type PeriodicTableConfig 

type PeriodicTableConfig struct {
	Prefix string
	Period time.Duration
	Tags   Tags
}

PeriodicTableConfig is configuration for a set of time-sharded tables.

func (PeriodicTableConfig) MarshalYAML 

func (cfg PeriodicTableConfig) MarshalYAML() (interface{}, error)

MarshalYAML implements the yaml.Marshaler interface.

func (*PeriodicTableConfig) TableFor 

func (cfg *PeriodicTableConfig) TableFor(t model.Time) string

TableFor calculates the table shard for a given point in time.

func (*PeriodicTableConfig) UnmarshalYAML 

func (cfg *PeriodicTableConfig) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements the yaml.Unmarshaler interface.

type ProvisionConfig 

type ProvisionConfig struct {
	ActiveTableProvisionConfig   `yaml:",inline"`
	InactiveTableProvisionConfig `yaml:",inline"`
}

ProvisionConfig holds config for provisioning capacity for index and chunk tables (on DynamoDB for now)

func (*ProvisionConfig) RegisterFlags 

func (cfg *ProvisionConfig) RegisterFlags(argPrefix string, f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet.

type QueryError 

type QueryError string

Query errors are to be treated as user errors, rather than storage errors.

func (QueryError) Error 

func (e QueryError) Error() string

type QueryPagesCallback 

type QueryPagesCallback func(IndexQuery, ReadBatch) bool

QueryPagesCallback from an IndexQuery.

type ReadBatch 

type ReadBatch interface {
	Iterator() ReadBatchIterator
}

ReadBatch represents the results of a QueryPages.

type ReadBatchIterator 

type ReadBatchIterator interface {
	Next() bool
	RangeValue() []byte
	Value() []byte
}

ReadBatchIterator is an iterator over a ReadBatch.

type SchemaConfig 

type SchemaConfig struct {
	Configs []PeriodConfig `yaml:"configs"`
	// contains filtered or unexported fields
}

SchemaConfig contains the config for our chunk index schemas

func DefaultSchemaConfig 

func DefaultSchemaConfig(store, schema string, from model.Time) SchemaConfig

DefaultSchemaConfig creates a simple schema config for testing

func (SchemaConfig) ChunkTableFor 

func (cfg SchemaConfig) ChunkTableFor(t model.Time) (string, error)

ChunkTableFor calculates the chunk table shard for a given point in time.

func (SchemaConfig) ExternalKey 

func (cfg SchemaConfig) ExternalKey(chunk Chunk) string

Generate the appropriate external key based on cfg.Schema, chunk.Checksum, and chunk.From

func (*SchemaConfig) ForEachAfter 

func (cfg *SchemaConfig) ForEachAfter(t model.Time, f func(config *PeriodConfig))

ForEachAfter will call f() on every entry after t, splitting entries if necessary so there is an entry starting at t

func (*SchemaConfig) Load 

func (cfg *SchemaConfig) Load() error

Load the yaml file, or build the config from legacy command-line flags

func (*SchemaConfig) RegisterFlags 

func (cfg *SchemaConfig) RegisterFlags(f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet.

func (SchemaConfig) SchemaForTime 

func (cfg SchemaConfig) SchemaForTime(t model.Time) (PeriodConfig, error)

SchemaForTime returns the Schema PeriodConfig to use for a given point in time.

func (*SchemaConfig) Validate 

func (cfg *SchemaConfig) Validate() error

Validate the schema config and returns an error if the validation doesn't pass

func (SchemaConfig) VersionForChunk 

func (cfg SchemaConfig) VersionForChunk(c Chunk) int

VersionForChunk will return the schema version associated with the `From` timestamp of a chunk. The schema and chunk must be valid+compatible as the errors are not checked.

type SeriesStoreSchema 

type SeriesStoreSchema interface {
	BaseSchema

	// returns cache key string and []IndexEntry per bucket, matched in order
	GetCacheKeysAndLabelWriteEntries(from, through model.Time, userID string, metricName string, labels labels.Labels, chunkID string) ([]string, [][]IndexEntry, error)
	GetChunkWriteEntries(from, through model.Time, userID string, metricName string, labels labels.Labels, chunkID string) ([]IndexEntry, error)

	// If the query resulted in series IDs, use this method to find chunks.
	GetChunksForSeries(from, through model.Time, userID string, seriesID []byte) ([]IndexQuery, error)
	// Returns queries to retrieve all label names of multiple series by id.
	GetLabelNamesForSeries(from, through model.Time, userID string, seriesID []byte) ([]IndexQuery, error)

	// GetSeriesDeleteEntries returns IndexEntry's for deleting SeriesIDs from SeriesStore.
	// Since SeriesIDs are created per bucket, it makes sure that we don't include series entries which are in use by verifying using hasChunksForIntervalFunc i.e
	// It checks first and last buckets covered by the time interval to see if a SeriesID still has chunks in the store,
	// if yes then it doesn't include IndexEntry's for that bucket for deletion.
	GetSeriesDeleteEntries(from, through model.Time, userID string, metric labels.Labels, hasChunksForIntervalFunc hasChunksForIntervalFunc) ([]IndexEntry, error)
}

SeriesStoreSchema is a schema used by seriesStore

type StorageCommonPrefix 

type StorageCommonPrefix string

StorageCommonPrefix represents a common prefix aka a synthetic directory in Object Store. It is guaranteed to always end with delimiter passed to List method.

type StorageObject 

type StorageObject struct {
	Key        string
	ModifiedAt time.Time
}

StorageObject represents an object being stored in an Object Store

type Store 

type Store interface {
	Put(ctx context.Context, chunks []Chunk) error
	PutOne(ctx context.Context, from, through model.Time, chunk Chunk) error
	// GetChunkRefs returns the un-loaded chunks and the fetchers to be used to load them. You can load each slice of chunks ([]Chunk),
	// using the corresponding Fetcher (fetchers[i].FetchChunks(ctx, chunks[i], ...)
	GetChunkRefs(ctx context.Context, userID string, from, through model.Time, matchers ...*labels.Matcher) ([][]Chunk, []*Fetcher, error)
	LabelValuesForMetricName(ctx context.Context, userID string, from, through model.Time, metricName string, labelName string, matchers ...*labels.Matcher) ([]string, error)
	LabelNamesForMetricName(ctx context.Context, userID string, from, through model.Time, metricName string) ([]string, error)
	GetChunkFetcher(tm model.Time) *Fetcher

	Stop()
}

Store for chunks.

type StoreConfig 

type StoreConfig struct {
	ChunkCacheConfig       cache.Config `yaml:"chunk_cache_config"`
	WriteDedupeCacheConfig cache.Config `yaml:"write_dedupe_cache_config"`

	CacheLookupsOlderThan model.Duration `yaml:"cache_lookups_older_than"`

	// When DisableIndexDeduplication is true and chunk is already there in cache, only index would be written to the store and not chunk.
	DisableIndexDeduplication bool `yaml:"-"`
	// contains filtered or unexported fields
}

StoreConfig specifies config for a ChunkStore

func (*StoreConfig) RegisterFlags 

func (cfg *StoreConfig) RegisterFlags(f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet

func (*StoreConfig) Validate 

func (cfg *StoreConfig) Validate(logger log.Logger) error

Validate validates the store config.

type StoreLimits 

type StoreLimits interface {
	MaxChunksPerQueryFromStore(userID string) int
	MaxQueryLength(userID string) time.Duration
}

StoreLimits helps get Limits specific to Queries for Stores

type TableClient 

type TableClient interface {
	ListTables(ctx context.Context) ([]string, error)
	CreateTable(ctx context.Context, desc TableDesc) error
	DeleteTable(ctx context.Context, name string) error
	DescribeTable(ctx context.Context, name string) (desc TableDesc, isActive bool, err error)
	UpdateTable(ctx context.Context, current, expected TableDesc) error
	Stop()
}

TableClient is a client for telling Dynamo what to do with tables.

type TableDesc 

type TableDesc struct {
	Name              string
	UseOnDemandIOMode bool
	ProvisionedRead   int64
	ProvisionedWrite  int64
	Tags              Tags
	WriteScale        AutoScalingConfig
	ReadScale         AutoScalingConfig
}

TableDesc describes a table.

func (TableDesc) Equals 

func (desc TableDesc) Equals(other TableDesc) bool

Equals returns true if other matches desc.

type TableManager 

type TableManager struct {
	services.Service
	// contains filtered or unexported fields
}

TableManager creates and manages the provisioned throughput on DynamoDB tables

func NewTableManager 

func NewTableManager(cfg TableManagerConfig, schemaCfg SchemaConfig, maxChunkAge time.Duration, tableClient TableClient,
	objectClient BucketClient, extraTables []ExtraTables, registerer prometheus.Registerer) (*TableManager, error)

NewTableManager makes a new TableManager

func (*TableManager) SyncTables 

func (m *TableManager) SyncTables(ctx context.Context) error

SyncTables will calculate the tables expected to exist, create those that do not and update those that need it. It is exposed for testing.

type TableManagerConfig 

type TableManagerConfig struct {
	// Master 'off-switch' for table capacity updates, e.g. when troubleshooting
	ThroughputUpdatesDisabled bool `yaml:"throughput_updates_disabled"`

	// Master 'on-switch' for table retention deletions
	RetentionDeletesEnabled bool `yaml:"retention_deletes_enabled"`

	// How far back tables will be kept before they are deleted
	RetentionPeriod time.Duration `yaml:"-"`
	// This is so that we can accept 1w, 1y in the YAML.
	RetentionPeriodModel model.Duration `yaml:"retention_period"`

	// Period with which the table manager will poll for tables.
	PollInterval time.Duration `yaml:"poll_interval"`

	// duration a table will be created before it is needed.
	CreationGracePeriod time.Duration `yaml:"creation_grace_period"`

	IndexTables ProvisionConfig `yaml:"index_tables_provisioning"`
	ChunkTables ProvisionConfig `yaml:"chunk_tables_provisioning"`
}

TableManagerConfig holds config for a TableManager

func (*TableManagerConfig) MarshalYAML 

func (cfg *TableManagerConfig) MarshalYAML() (interface{}, error)

MarshalYAML implements the yaml.Marshaler interface. To support RetentionPeriod.

func (*TableManagerConfig) RegisterFlags 

func (cfg *TableManagerConfig) RegisterFlags(f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet.

func (*TableManagerConfig) UnmarshalYAML 

func (cfg *TableManagerConfig) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements the yaml.Unmarshaler interface. To support RetentionPeriod.

func (*TableManagerConfig) Validate 

func (cfg *TableManagerConfig) Validate() error

Validate validates the config.

type Tags 

type Tags map[string]string

Tags is a string-string map that implements flag.Value.

func (Tags) Equals 

func (ts Tags) Equals(other Tags) bool

Equals returns true is other matches ts.

func (*Tags) Set 

func (ts *Tags) Set(s string) error

Set implements flag.Value

func (Tags) String 

func (ts Tags) String() string

String implements flag.Value

func (*Tags) UnmarshalYAML 

func (ts *Tags) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements yaml.Unmarshaler.

type UniqueStrings 

type UniqueStrings struct {
	// contains filtered or unexported fields
}

UniqueStrings keeps a slice of unique strings.

func NewUniqueStrings 

func NewUniqueStrings(sizeHint int) UniqueStrings

NewUniqueStrings returns a UniqueStrings instance with a pre-allocated result buffer.

func (*UniqueStrings) Add 

func (us *UniqueStrings) Add(strings ...string)

Add adds a new string, dropping duplicates.

func (UniqueStrings) Strings 

func (us UniqueStrings) Strings() []string

Strings returns the sorted sliced of unique strings.

type WriteBatch 

type WriteBatch interface {
	Add(tableName, hashValue string, rangeValue []byte, value []byte)
	Delete(tableName, hashValue string, rangeValue []byte)
}

WriteBatch represents a batch of writes.

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This file was taken from Prometheus (https://github.com/prometheus/prometheus).
 This file was taken from Prometheus (https://github.com/prometheus/prometheus).

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