coordinator

package
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Published: Feb 17, 2017 License: MIT Imports: 18 Imported by: 0

Documentation

Index

Constants

View Source
const (
	// DefaultWriteTimeout is the default timeout for a complete write to succeed.
	DefaultWriteTimeout = 10 * time.Second

	// DefaultMaxConcurrentQueries is the maximum number of running queries.
	// A value of zero will make the maximum query limit unlimited.
	DefaultMaxConcurrentQueries = 0

	// DefaultMaxSelectPointN is the maximum number of points a SELECT can process.
	// A value of zero will make the maximum point count unlimited.
	DefaultMaxSelectPointN = 0

	// DefaultMaxSelectSeriesN is the maximum number of series a SELECT can run.
	// A value of zero will make the maximum series count unlimited.
	DefaultMaxSelectSeriesN = 0
)

Variables

View Source
var (
	// ErrTimeout is returned when a write times out.
	ErrTimeout = errors.New("timeout")

	// ErrPartialWrite is returned when a write partially succeeds but does
	// not meet the requested consistency level.
	ErrPartialWrite = errors.New("partial write")

	// ErrWriteFailed is returned when no writes succeeded.
	ErrWriteFailed = errors.New("write failed")
)
View Source
var ErrDatabaseNameRequired = errors.New("database name required")

Functions

This section is empty.

Types

type BufferedPointsWriter added in v1.0.0

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

func NewBufferedPointsWriter added in v1.0.0

func NewBufferedPointsWriter(w pointsWriter, database, retentionPolicy string, capacity int) *BufferedPointsWriter

func (*BufferedPointsWriter) Cap added in v1.0.0

func (w *BufferedPointsWriter) Cap() int

Cap returns the capacity (in points) of the buffer.

func (*BufferedPointsWriter) Flush added in v1.0.0

func (w *BufferedPointsWriter) Flush() error

Flush writes all buffered points to the underlying writer.

func (*BufferedPointsWriter) Len added in v1.0.0

func (w *BufferedPointsWriter) Len() int

Len returns the number of points buffered.

func (*BufferedPointsWriter) WritePointsInto added in v1.0.0

func (w *BufferedPointsWriter) WritePointsInto(req *IntoWriteRequest) error

type Config added in v1.0.0

type Config struct {
	WriteTimeout         toml.Duration `toml:"write-timeout"`
	MaxConcurrentQueries int           `toml:"max-concurrent-queries"`
	QueryTimeout         toml.Duration `toml:"query-timeout"`
	LogQueriesAfter      toml.Duration `toml:"log-queries-after"`
	MaxSelectPointN      int           `toml:"max-select-point"`
	MaxSelectSeriesN     int           `toml:"max-select-series"`
	MaxSelectBucketsN    int           `toml:"max-select-buckets"`
}

Config represents the configuration for the clustering service.

func NewConfig added in v1.0.0

func NewConfig() Config

NewConfig returns an instance of Config with defaults.

type IntoWriteRequest added in v1.0.0

type IntoWriteRequest struct {
	Database        string
	RetentionPolicy string
	Points          []models.Point
}

IntoWriteRequest is a partial copy of cluster.WriteRequest

type LocalTSDBStore added in v1.0.0

type LocalTSDBStore struct {
	*tsdb.Store
}

func (LocalTSDBStore) IteratorCreator added in v1.0.0

func (s LocalTSDBStore) IteratorCreator(shards []meta.ShardInfo, opt *influxql.SelectOptions) (influxql.IteratorCreator, error)

type MetaClient added in v1.0.0

type MetaClient interface {
	CreateContinuousQuery(database, name, query string) error
	CreateDatabase(name string) (*meta.DatabaseInfo, error)
	CreateDatabaseWithRetentionPolicy(name string, spec *meta.RetentionPolicySpec) (*meta.DatabaseInfo, error)
	CreateRetentionPolicy(database string, spec *meta.RetentionPolicySpec) (*meta.RetentionPolicyInfo, error)
	CreateSubscription(database, rp, name, mode string, destinations []string) error
	CreateUser(name, password string, admin bool) (*meta.UserInfo, error)
	Database(name string) *meta.DatabaseInfo
	Databases() []meta.DatabaseInfo
	DropShard(id uint64) error
	DropContinuousQuery(database, name string) error
	DropDatabase(name string) error
	DropRetentionPolicy(database, name string) error
	DropSubscription(database, rp, name string) error
	DropUser(name string) error
	RetentionPolicy(database, name string) (rpi *meta.RetentionPolicyInfo, err error)
	SetAdminPrivilege(username string, admin bool) error
	SetDefaultRetentionPolicy(database, name string) error
	SetPrivilege(username, database string, p influxql.Privilege) error
	ShardsByTimeRange(sources influxql.Sources, tmin, tmax time.Time) (a []meta.ShardInfo, err error)
	UpdateRetentionPolicy(database, name string, rpu *meta.RetentionPolicyUpdate) error
	UpdateUser(name, password string) error
	UserPrivilege(username, database string) (*influxql.Privilege, error)
	UserPrivileges(username string) (map[string]influxql.Privilege, error)
	Users() []meta.UserInfo
}

MetaClient is an interface for accessing meta data.

type PointsWriter added in v1.0.0

type PointsWriter struct {
	WriteTimeout time.Duration
	Logger       *log.Logger

	Node *influxdb.Node

	MetaClient interface {
		Database(name string) (di *meta.DatabaseInfo)
		RetentionPolicy(database, policy string) (*meta.RetentionPolicyInfo, error)
		CreateShardGroup(database, policy string, timestamp time.Time) (*meta.ShardGroupInfo, error)
		ShardOwner(shardID uint64) (string, string, *meta.ShardGroupInfo)
	}

	TSDBStore interface {
		CreateShard(database, retentionPolicy string, shardID uint64, enabled bool) error
		WriteToShard(shardID uint64, points []models.Point) error
	}

	ShardWriter interface {
		WriteShard(shardID, ownerID uint64, points []models.Point) error
	}

	Subscriber interface {
		Points() chan<- *WritePointsRequest
	}
	// contains filtered or unexported fields
}

PointsWriter handles writes across multiple local and remote data nodes.

func NewPointsWriter added in v1.0.0

func NewPointsWriter() *PointsWriter

NewPointsWriter returns a new instance of PointsWriter for a node.

func (*PointsWriter) Close added in v1.0.0

func (w *PointsWriter) Close() error

Close closes the communication channel with the point writer

func (*PointsWriter) MapShards added in v1.0.0

func (w *PointsWriter) MapShards(wp *WritePointsRequest) (*ShardMapping, error)

MapShards maps the points contained in wp to a ShardMapping. If a point maps to a shard group or shard that does not currently exist, it will be created before returning the mapping.

func (*PointsWriter) Open added in v1.0.0

func (w *PointsWriter) Open() error

Open opens the communication channel with the point writer

func (*PointsWriter) SetLogOutput added in v1.0.0

func (w *PointsWriter) SetLogOutput(lw io.Writer)

SetLogOutput sets the writer to which all logs are written. It must not be called after Open is called.

func (*PointsWriter) Statistics added in v1.0.0

func (w *PointsWriter) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

func (*PointsWriter) WritePoints added in v1.0.0

func (w *PointsWriter) WritePoints(database, retentionPolicy string, consistencyLevel models.ConsistencyLevel, points []models.Point) error

WritePoints writes across multiple local and remote data nodes according the consistency level.

func (*PointsWriter) WritePointsInto added in v1.0.0

func (w *PointsWriter) WritePointsInto(p *IntoWriteRequest) error

WritePointsInto is a copy of WritePoints that uses a tsdb structure instead of a cluster structure for information. This is to avoid a circular dependency

type ShardIteratorCreator added in v1.0.0

type ShardIteratorCreator interface {
	ShardIteratorCreator(id uint64) influxql.IteratorCreator
}

ShardIteratorCreator is an interface for creating an IteratorCreator to access a specific shard.

type ShardMapping added in v1.0.0

type ShardMapping struct {
	Points map[uint64][]models.Point  // The points associated with a shard ID
	Shards map[uint64]*meta.ShardInfo // The shards that have been mapped, keyed by shard ID
}

ShardMapping contains a mapping of a shards to a points.

func NewShardMapping added in v1.0.0

func NewShardMapping() *ShardMapping

NewShardMapping creates an empty ShardMapping

func (*ShardMapping) MapPoint added in v1.0.0

func (s *ShardMapping) MapPoint(shardInfo *meta.ShardInfo, p models.Point)

MapPoint maps a point to shard

type StatementExecutor added in v1.0.0

type StatementExecutor struct {
	MetaClient MetaClient

	// TaskManager holds the StatementExecutor that handles task-related commands.
	TaskManager influxql.StatementExecutor

	// TSDB storage for local node.
	TSDBStore TSDBStore

	// Holds monitoring data for SHOW STATS and SHOW DIAGNOSTICS.
	Monitor *monitor.Monitor

	// Used for rewriting points back into system for SELECT INTO statements.
	PointsWriter pointsWriter

	// Select statement limits
	MaxSelectPointN   int
	MaxSelectSeriesN  int
	MaxSelectBucketsN int
}

StatementExecutor executes a statement in the query.

func (*StatementExecutor) ExecuteStatement added in v1.0.0

func (e *StatementExecutor) ExecuteStatement(stmt influxql.Statement, ctx influxql.ExecutionContext) error

func (*StatementExecutor) NormalizeStatement added in v1.0.0

func (e *StatementExecutor) NormalizeStatement(stmt influxql.Statement, defaultDatabase string) (err error)

NormalizeStatement adds a default database and policy to the measurements in statement.

type TSDBStore added in v1.0.0

type TSDBStore interface {
	CreateShard(database, policy string, shardID uint64, enabled bool) error
	WriteToShard(shardID uint64, points []models.Point) error

	RestoreShard(id uint64, r io.Reader) error
	BackupShard(id uint64, since time.Time, w io.Writer) error

	DeleteDatabase(name string) error
	DeleteMeasurement(database, name string) error
	DeleteRetentionPolicy(database, name string) error
	DeleteSeries(database string, sources []influxql.Source, condition influxql.Expr) error
	DeleteShard(id uint64) error
	IteratorCreator(shards []meta.ShardInfo, opt *influxql.SelectOptions) (influxql.IteratorCreator, error)

	Measurements(database string, cond influxql.Expr) ([]string, error)
	TagValues(database string, cond influxql.Expr) ([]tsdb.TagValues, error)
}

TSDBStore is an interface for accessing the time series data store.

type WritePointsRequest added in v1.0.0

type WritePointsRequest struct {
	Database        string
	RetentionPolicy string
	Points          []models.Point
}

WritePointsRequest represents a request to write point data to the cluster

func (*WritePointsRequest) AddPoint added in v1.0.0

func (w *WritePointsRequest) AddPoint(name string, value interface{}, timestamp time.Time, tags map[string]string)

AddPoint adds a point to the WritePointRequest with field key 'value'

type WriteStatistics added in v1.0.0

type WriteStatistics struct {
	WriteReq           int64
	PointWriteReq      int64
	PointWriteReqLocal int64
	WriteOK            int64
	WriteDropped       int64
	WriteTimeout       int64
	WriteErr           int64
	SubWriteOK         int64
	SubWriteDrop       int64
}

WriteStatistics keeps statistics related to the PointsWriter.

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