kapacitor

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 Go to latest Published: Nov 28, 2017 License: MIT Imports: 67 Imported by: 0

README

Kapacitor Circle CI Docker pulls

Open source framework for processing, monitoring, and alerting on time series data

Installation

Kapacitor has two binaries:

  • kapacitor – a CLI program for calling the Kapacitor API.
  • kapacitord – the Kapacitor server daemon.

You can either download the binaries directly from the downloads page or go get them:

go get github.com/influxdata/kapacitor/cmd/kapacitor
go get github.com/influxdata/kapacitor/cmd/kapacitord

Configuration

An example configuration file can be found here

Kapacitor can also provide an example config for you using this command:

kapacitord config

Getting Started

This README gives you a high level overview of what Kapacitor is and what its like to use it. As well as some details of how it works. To get started using Kapacitor see this guide. After you finish the getting started exercise you can check out the TICKscripts for different Telegraf plugins.

Basic Example

Kapacitor use a DSL named TICKscript to define tasks.

A simple TICKscript that alerts on high cpu usage looks like this:

stream
    |from()
        .measurement('cpu_usage_idle')
        .groupBy('host')
    |window()
        .period(1m)
        .every(1m)
    |mean('value')
    |eval(lambda: 100.0 - "mean")
        .as('used')
    |alert()
        .message('{{ .Level}}: {{ .Name }}/{{ index .Tags "host" }} has high cpu usage: {{ index .Fields "used" }}')
        .warn(lambda: "used" > 70.0)
        .crit(lambda: "used" > 85.0)

        // Send alert to hander of choice.

        // Slack
        .slack()
        .channel('#alerts')

        // VictorOps
        .victorOps()
        .routingKey('team_rocket')

        // PagerDuty
        .pagerDuty()

Place the above script into a file cpu_alert.tick then run these commands to start the task:

# Define the task (assumes cpu data is in db 'telegraf')
kapacitor define \
    cpu_alert \
    -type stream \
    -dbrp telegraf.default \
    -tick ./cpu_alert.tick
# Start the task
kapacitor enable cpu_alert

For more complete examples see the documentation.

Documentation

Overview

A data pipeline processing engine.

See the README for more complete examples and guides.

Code Organization:

The pipeline package provides an API for how nodes can be connected to form a pipeline. The individual implementations of each node exist in this kapacitor package. The reason for the separation is to keep the exported API from the pipeline package clean as it is consumed via the TICKscripts (a DSL for Kapacitor).

Other Concepts:

Stream vs Batch -- Use of the word 'stream' indicates data arrives a single data point at a time. Use of the word 'batch' indicates data arrives in sets or batches or data points.

Task -- A task represents a concrete workload to perform. It consists of a pipeline and an identifying name. Basic CRUD operations can be performed on tasks.

Task Master -- Responsible for executing a task in a specific environment.

Replay -- Replays static datasets against tasks.

Index

Constants

View Source 
const (
	MainTaskMaster = "main"
)

Variables

View Source 
var ErrAborted = errors.New("edged aborted")
View Source 
var ErrTaskMasterClosed = errors.New("TaskMaster is closed")
View Source 
var ErrTaskMasterOpen = errors.New("TaskMaster is open")
View Source 
var ErrWrongTaskType = errors.New("wrong task type")

Functions

func ConvertResultTimes added in v0.10.1 

func ConvertResultTimes(r *Result)

func CreateDBRPMap 

func CreateDBRPMap(dbrps []DBRP) map[DBRP]bool

func EvalPredicate 

func EvalPredicate(se stateful.Expression, scopePool stateful.ScopePool, p edge.FieldsTagsTimeGetter) (bool, error)

EvalPredicate - Evaluate a given expression as a boolean predicate against a set of fields and tags

func ReplayBatchFromChan added in v1.0.0 

func ReplayBatchFromChan(clck clock.Clock, batches []<-chan edge.BufferedBatchMessage, collectors []BatchCollector, recTime bool) <-chan error

Replay batch data from a channel source.

func ReplayBatchFromIO added in v1.0.0 

func ReplayBatchFromIO(clck clock.Clock, data []io.ReadCloser, collectors []BatchCollector, recTime bool) <-chan error

Replay batch data from an IO source.

func ReplayStreamFromChan added in v1.0.0 

func ReplayStreamFromChan(clck clock.Clock, points <-chan edge.PointMessage, collector StreamCollector, recTime bool) <-chan error

Replay stream data from a channel source.

func ReplayStreamFromIO added in v1.0.0 

func ReplayStreamFromIO(clck clock.Clock, data io.ReadCloser, collector StreamCollector, recTime bool, precision string) <-chan error

Replay stream data from an IO source.

func WriteBatchForRecording 

func WriteBatchForRecording(w io.Writer, b edge.BufferedBatchMessage) error

func WritePointForRecording 

func WritePointForRecording(w io.Writer, p edge.PointMessage, precision string) error

Types

type AlertNode 

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

func (*AlertNode) NewGroup added in v1.4.0 

func (n *AlertNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*AlertNode) Wait added in v0.11.0 

func (n *AlertNode) Wait() error

type AutoscaleNode added in v1.4.0 

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

func (*AutoscaleNode) NewGroup added in v1.4.0 

func (n *AutoscaleNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*AutoscaleNode) Wait added in v1.4.0 

func (n *AutoscaleNode) Wait() error

type BarrierNode added in v1.4.0 

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

func (*BarrierNode) NewGroup added in v1.4.0 

func (n *BarrierNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*BarrierNode) Wait added in v1.4.0 

func (n *BarrierNode) Wait() error

type BatchCollector 

type BatchCollector interface {
	CollectBatch(edge.BufferedBatchMessage) error
	Close() error
}

type BatchNode 

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

func (*BatchNode) Abort added in v0.10.1 

func (n *BatchNode) Abort()

func (*BatchNode) Count added in v0.13.0 

func (n *BatchNode) Count() int

func (*BatchNode) DBRPs 

func (n *BatchNode) DBRPs() ([]DBRP, error)

Return list of databases and retention policies the batcher will query.

func (*BatchNode) Queries 

func (n *BatchNode) Queries(start, stop time.Time) ([]BatchQueries, error)

func (*BatchNode) Start 

func (n *BatchNode) Start()

func (*BatchNode) Wait added in v0.11.0 

func (n *BatchNode) Wait() error

type BatchQueries added in v1.0.0 

type BatchQueries struct {
	Queries            []*Query
	Cluster            string
	GroupByMeasurement bool
}

type CombineNode added in v1.0.0 

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

func (*CombineNode) NewGroup added in v1.4.0 

func (n *CombineNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*CombineNode) Wait added in v1.0.0 

func (n *CombineNode) Wait() error

type DBRP 

type DBRP struct {
	Database        string `json:"db"`
	RetentionPolicy string `json:"rp"`
}

func (DBRP) String 

func (d DBRP) String() string

type DefaultNode added in v0.13.0 

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

func (*DefaultNode) Barrier added in v1.4.0 

func (n *DefaultNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*DefaultNode) BatchPoint added in v1.4.0 

func (n *DefaultNode) BatchPoint(bp edge.BatchPointMessage) (edge.Message, error)

func (*DefaultNode) BeginBatch added in v1.4.0 

func (n *DefaultNode) BeginBatch(begin edge.BeginBatchMessage) (edge.Message, error)

func (*DefaultNode) DeleteGroup added in v1.4.0 

func (n *DefaultNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*DefaultNode) EndBatch added in v1.4.0 

func (n *DefaultNode) EndBatch(end edge.EndBatchMessage) (edge.Message, error)

func (*DefaultNode) Point added in v1.4.0 

func (n *DefaultNode) Point(p edge.PointMessage) (edge.Message, error)

func (*DefaultNode) Wait added in v0.13.0 

func (n *DefaultNode) Wait() error

type DeleteNode added in v1.0.0 

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

func (*DeleteNode) Barrier added in v1.4.0 

func (n *DeleteNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*DeleteNode) BatchPoint added in v1.4.0 

func (n *DeleteNode) BatchPoint(bp edge.BatchPointMessage) (edge.Message, error)

func (*DeleteNode) BeginBatch added in v1.4.0 

func (n *DeleteNode) BeginBatch(begin edge.BeginBatchMessage) (edge.Message, error)

func (*DeleteNode) DeleteGroup added in v1.4.0 

func (n *DeleteNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*DeleteNode) EndBatch added in v1.4.0 

func (n *DeleteNode) EndBatch(end edge.EndBatchMessage) (edge.Message, error)

func (*DeleteNode) Point added in v1.4.0 

func (n *DeleteNode) Point(p edge.PointMessage) (edge.Message, error)

func (*DeleteNode) Wait added in v1.0.0 

func (n *DeleteNode) Wait() error

type DerivativeNode 

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

func (*DerivativeNode) NewGroup added in v1.4.0 

func (n *DerivativeNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*DerivativeNode) Wait added in v0.11.0 

func (n *DerivativeNode) Wait() error

type Diagnostic added in v1.4.0 

type Diagnostic interface {
	WithTaskContext(task string) TaskDiagnostic
	WithTaskMasterContext(tm string) Diagnostic
	WithNodeContext(node string) NodeDiagnostic
	WithEdgeContext(task, parent, child string) EdgeDiagnostic

	TaskMasterOpened()
	TaskMasterClosed()

	StartingTask(id string)
	StartedTask(id string)

	StoppedTask(id string)
	StoppedTaskWithError(id string, err error)

	TaskMasterDot(d string)
}

type Edge 

type Edge struct {
	edge.StatsEdge
	// contains filtered or unexported fields
}

func (*Edge) Close 

func (e *Edge) Close() error

type EdgeDiagnostic added in v1.4.0 

type EdgeDiagnostic interface {
	ClosingEdge(collected, emitted int64)
}

type EvalNode 

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

func (*EvalNode) NewGroup added in v1.4.0 

func (n *EvalNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*EvalNode) Wait added in v0.11.0 

func (n *EvalNode) Wait() error

type ExecutingTask 

type ExecutingTask struct {
	Task *Task
	// contains filtered or unexported fields
}

A task that is ready for execution.

func NewExecutingTask 

func NewExecutingTask(tm *TaskMaster, t *Task) (*ExecutingTask, error)

Create a new task from a defined kapacitor.

func (*ExecutingTask) BatchCount 

func (et *ExecutingTask) BatchCount() (int, error)

func (*ExecutingTask) BatchQueries 

func (et *ExecutingTask) BatchQueries(start, stop time.Time) ([]BatchQueries, error)

Get the next `num` batch queries that the batcher will run starting at time `start`.

func (*ExecutingTask) EDot added in v0.2.3 

func (et *ExecutingTask) EDot(labels bool) []byte

Return a graphviz .dot formatted byte array. Label edges with relavant execution information.

func (*ExecutingTask) ExecutionStats added in v0.11.0 

func (et *ExecutingTask) ExecutionStats() (ExecutionStats, error)

func (*ExecutingTask) GetOutput 

func (et *ExecutingTask) GetOutput(name string) (Output, error)

Get a named output.

func (*ExecutingTask) Snapshot added in v0.10.0 

func (et *ExecutingTask) Snapshot() (*TaskSnapshot, error)

func (*ExecutingTask) StartBatching 

func (et *ExecutingTask) StartBatching() error

Instruct source batch node to start querying and sending batches of data

func (*ExecutingTask) StopStats added in v0.11.0 

func (et *ExecutingTask) StopStats()

Stop all stats nodes

func (*ExecutingTask) Wait added in v0.11.0 

func (et *ExecutingTask) Wait() error

Wait till the task finishes and return any error

type ExecutionStats added in v0.11.0 

type ExecutionStats struct {
	TaskStats map[string]interface{}
	NodeStats map[string]map[string]interface{}
}

type FlattenNode added in v1.0.0 

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

func (*FlattenNode) NewGroup added in v1.4.0 

func (n *FlattenNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*FlattenNode) Wait added in v1.0.0 

func (n *FlattenNode) Wait() error

type FromNode added in v0.13.0 

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

func (*FromNode) Barrier added in v1.4.0 

func (n *FromNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*FromNode) BatchPoint added in v1.4.0 

func (n *FromNode) BatchPoint(edge.BatchPointMessage) (edge.Message, error)

func (*FromNode) BeginBatch added in v1.4.0 

func (n *FromNode) BeginBatch(edge.BeginBatchMessage) (edge.Message, error)

func (*FromNode) DeleteGroup added in v1.4.0 

func (n *FromNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*FromNode) EndBatch added in v1.4.0 

func (n *FromNode) EndBatch(edge.EndBatchMessage) (edge.Message, error)

func (*FromNode) Point added in v1.4.0 

func (n *FromNode) Point(p edge.PointMessage) (edge.Message, error)

func (*FromNode) Wait added in v0.13.0 

func (n *FromNode) Wait() error

type GroupByNode 

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

func (*GroupByNode) Barrier added in v1.4.0 

func (n *GroupByNode) Barrier(b edge.BarrierMessage) error

func (*GroupByNode) BatchPoint added in v1.4.0 

func (n *GroupByNode) BatchPoint(bp edge.BatchPointMessage) error

func (*GroupByNode) BeginBatch added in v1.4.0 

func (n *GroupByNode) BeginBatch(begin edge.BeginBatchMessage) error

func (*GroupByNode) DeleteGroup added in v1.4.0 

func (n *GroupByNode) DeleteGroup(d edge.DeleteGroupMessage) error

func (*GroupByNode) EndBatch added in v1.4.0 

func (n *GroupByNode) EndBatch(end edge.EndBatchMessage) error

func (*GroupByNode) Point added in v1.4.0 

func (n *GroupByNode) Point(p edge.PointMessage) error

func (*GroupByNode) Wait added in v0.11.0 

func (n *GroupByNode) Wait() error

type HTTPOutNode 

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

func (*HTTPOutNode) Endpoint 

func (n *HTTPOutNode) Endpoint() string

func (*HTTPOutNode) NewGroup added in v1.4.0 

func (n *HTTPOutNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*HTTPOutNode) Wait added in v0.11.0 

func (n *HTTPOutNode) Wait() error

type HTTPPostNode added in v1.3.0 

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

func (*HTTPPostNode) NewGroup added in v1.4.0 

func (n *HTTPPostNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*HTTPPostNode) Wait added in v1.3.0 

func (n *HTTPPostNode) Wait() error

type InfluxDBOutNode 

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

func (*InfluxDBOutNode) Barrier added in v1.4.0 

func (n *InfluxDBOutNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*InfluxDBOutNode) BatchPoint added in v1.4.0 

func (n *InfluxDBOutNode) BatchPoint(bp edge.BatchPointMessage) (edge.Message, error)

func (*InfluxDBOutNode) BeginBatch added in v1.4.0 

func (n *InfluxDBOutNode) BeginBatch(begin edge.BeginBatchMessage) (edge.Message, error)

func (*InfluxDBOutNode) BufferedBatch added in v1.4.0 

func (n *InfluxDBOutNode) BufferedBatch(batch edge.BufferedBatchMessage) (edge.Message, error)

func (*InfluxDBOutNode) DeleteGroup added in v1.4.0 

func (n *InfluxDBOutNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*InfluxDBOutNode) EndBatch added in v1.4.0 

func (n *InfluxDBOutNode) EndBatch(end edge.EndBatchMessage) (edge.Message, error)

func (*InfluxDBOutNode) Point added in v1.4.0 

func (n *InfluxDBOutNode) Point(p edge.PointMessage) (edge.Message, error)

func (*InfluxDBOutNode) Wait added in v0.11.0 

func (n *InfluxDBOutNode) Wait() error

type InfluxQLNode added in v0.11.0 

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

func (*InfluxQLNode) NewGroup added in v1.4.0 

func (n *InfluxQLNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*InfluxQLNode) Wait added in v0.11.0 

func (n *InfluxQLNode) Wait() error

type JoinNode 

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

func (*JoinNode) Barrier added in v1.4.0 

func (n *JoinNode) Barrier(src int, b edge.BarrierMessage) error

func (*JoinNode) BufferedBatch added in v1.4.0 

func (n *JoinNode) BufferedBatch(src int, batch edge.BufferedBatchMessage) error

func (*JoinNode) Finish added in v1.4.0 

func (n *JoinNode) Finish() error

func (*JoinNode) Point added in v1.4.0 

func (n *JoinNode) Point(src int, p edge.PointMessage) error

func (*JoinNode) Wait added in v0.11.0 

func (n *JoinNode) Wait() error

type KapacitorLoopbackNode added in v1.3.0 

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

func (*KapacitorLoopbackNode) Barrier added in v1.4.0 

func (n *KapacitorLoopbackNode) Barrier(edge.BarrierMessage) error

func (*KapacitorLoopbackNode) BatchPoint added in v1.4.0 

func (n *KapacitorLoopbackNode) BatchPoint(bp edge.BatchPointMessage) error

func (*KapacitorLoopbackNode) BeginBatch added in v1.4.0 

func (n *KapacitorLoopbackNode) BeginBatch(begin edge.BeginBatchMessage) error

func (*KapacitorLoopbackNode) DeleteGroup added in v1.4.0 

func (n *KapacitorLoopbackNode) DeleteGroup(edge.DeleteGroupMessage) error

func (*KapacitorLoopbackNode) EndBatch added in v1.4.0 

func (n *KapacitorLoopbackNode) EndBatch(edge.EndBatchMessage) error

func (*KapacitorLoopbackNode) Point added in v1.4.0 

func (n *KapacitorLoopbackNode) Point(p edge.PointMessage) error

func (*KapacitorLoopbackNode) Wait added in v1.3.0 

func (n *KapacitorLoopbackNode) Wait() error

type LogNode added in v0.11.0 

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

func (*LogNode) Barrier added in v1.4.0 

func (n *LogNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*LogNode) BatchPoint added in v1.4.0 

func (n *LogNode) BatchPoint(bp edge.BatchPointMessage) (edge.Message, error)

func (*LogNode) BeginBatch added in v1.4.0 

func (n *LogNode) BeginBatch(begin edge.BeginBatchMessage) (edge.Message, error)

func (*LogNode) BufferedBatch added in v1.4.0 

func (n *LogNode) BufferedBatch(batch edge.BufferedBatchMessage) (edge.Message, error)

func (*LogNode) DeleteGroup added in v1.4.0 

func (n *LogNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*LogNode) EndBatch added in v1.4.0 

func (n *LogNode) EndBatch(end edge.EndBatchMessage) (edge.Message, error)

func (*LogNode) Point added in v1.4.0 

func (n *LogNode) Point(p edge.PointMessage) (edge.Message, error)

func (*LogNode) Wait added in v0.11.0 

func (n *LogNode) Wait() error

type LogService 

type LogService interface {
	NewLogger(prefix string, flag int) *log.Logger
}

type MaxDuration added in v0.11.0 

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

MaxDuration is a 64-bit int variable representing a duration in nanoseconds,that satisfies the expvar.Var interface. When setting a value it will only be set if it is greater than the current value.

func (*MaxDuration) IntValue added in v0.11.0 

func (v *MaxDuration) IntValue() int64

func (*MaxDuration) Set added in v0.11.0 

func (v *MaxDuration) Set(next int64)

Set sets value if it is greater than current value. If set was successful and a setter exists, will pass on value to setter.

func (*MaxDuration) String added in v0.11.0 

func (v *MaxDuration) String() string

func (*MaxDuration) StringValue added in v1.0.0 

func (v *MaxDuration) StringValue() string

type NoOpNode added in v0.11.0 

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

func (*NoOpNode) Wait added in v0.11.0 

func (n *NoOpNode) Wait() error

type Node 

type Node interface {
	pipeline.Node

	// wait for the node to finish processing and return any errors
	Wait() error
	// contains filtered or unexported methods
}

A node that can be in an executor.

type NodeDiagnostic added in v1.4.0 

type NodeDiagnostic interface {
	Error(msg string, err error, ctx ...keyvalue.T)

	// AlertNode
	AlertTriggered(level alert.Level, id string, message string, rows *models.Row)

	// AutoscaleNode
	SettingReplicas(new int, old int, id string)

	// QueryNode
	StartingBatchQuery(q string)

	// LogNode
	LogPointData(key, prefix string, data edge.PointMessage)
	LogBatchData(key, prefix string, data edge.BufferedBatchMessage)

	//UDF
	UDFLog(s string)
}

type NoopMetaClient added in v1.0.0 

type NoopMetaClient struct{}

func (*NoopMetaClient) Authenticate added in v1.0.0 

func (m *NoopMetaClient) Authenticate(username, password string) (ui *meta.UserInfo, err error)

func (*NoopMetaClient) CreateDatabase added in v1.0.0 

func (m *NoopMetaClient) CreateDatabase(name string) (*meta.DatabaseInfo, error)

func (*NoopMetaClient) CreateDatabaseWithRetentionPolicy added in v1.0.0 

func (m *NoopMetaClient) CreateDatabaseWithRetentionPolicy(name string, rpi *meta.RetentionPolicySpec) (*meta.DatabaseInfo, error)

func (*NoopMetaClient) CreateRetentionPolicy added in v1.0.0 

func (m *NoopMetaClient) CreateRetentionPolicy(database string, rpi *meta.RetentionPolicySpec) (*meta.RetentionPolicyInfo, error)

func (*NoopMetaClient) Database added in v1.0.0 

func (m *NoopMetaClient) Database(name string) *meta.DatabaseInfo

func (*NoopMetaClient) RetentionPolicy added in v1.0.0 

func (m *NoopMetaClient) RetentionPolicy(database, name string) (*meta.RetentionPolicyInfo, error)

func (*NoopMetaClient) Users added in v1.0.0 

func (m *NoopMetaClient) Users() ([]meta.UserInfo, error)

func (*NoopMetaClient) WaitForLeader added in v1.0.0 

func (m *NoopMetaClient) WaitForLeader(d time.Duration) error

type Output 

type Output interface {
	Endpoint() string
}

An output of a pipeline. Still need to improve this interface to expose different types of outputs.

type Query 

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

func NewQuery 

func NewQuery(queryString string) (*Query, error)

func (*Query) AlignGroup added in v1.2.0 

func (q *Query) AlignGroup()

func (*Query) Clone added in v1.0.1 

func (q *Query) Clone() (*Query, error)

Deep clone this query

func (*Query) DBRPs 

func (q *Query) DBRPs() ([]DBRP, error)

Return the db rp pairs of the query

func (*Query) Dimensions 

func (q *Query) Dimensions(dims []interface{}) error

Set the dimensions on the query

func (*Query) Fill 

func (q *Query) Fill(option influxql.FillOption, value interface{})

func (*Query) IsGroupedByTime added in v1.0.1 

func (q *Query) IsGroupedByTime() bool

func (*Query) SetStartTime added in v1.0.1 

func (q *Query) SetStartTime(s time.Time)

Set the start time of the query

func (*Query) SetStopTime added in v1.0.1 

func (q *Query) SetStopTime(s time.Time)

Set the stop time of the query

func (*Query) StartTime added in v1.0.1 

func (q *Query) StartTime() time.Time

Set the start time of the query

func (*Query) StopTime added in v1.0.1 

func (q *Query) StopTime() time.Time

Set the stop time of the query

func (*Query) String 

func (q *Query) String() string

type QueryNode added in v0.13.0 

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

func (*QueryNode) Abort added in v0.13.0 

func (n *QueryNode) Abort()

func (*QueryNode) Cluster added in v1.0.0 

func (n *QueryNode) Cluster() string

func (*QueryNode) DBRPs added in v0.13.0 

func (n *QueryNode) DBRPs() ([]DBRP, error)

Return list of databases and retention policies the batcher will query.

func (*QueryNode) GroupByMeasurement added in v1.0.0 

func (n *QueryNode) GroupByMeasurement() bool

func (*QueryNode) Queries added in v0.13.0 

func (n *QueryNode) Queries(start, stop time.Time) ([]*Query, error)

func (*QueryNode) Start added in v0.13.0 

func (n *QueryNode) Start()

func (*QueryNode) Wait added in v0.13.0 

func (n *QueryNode) Wait() error

type Result 

type Result influxql.Result

The result from an output.

func ResultFromJSON 

func ResultFromJSON(in io.Reader) (r Result)

Unmarshal a Result object from JSON.

type SampleNode 

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

func (*SampleNode) NewGroup added in v1.4.0 

func (n *SampleNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*SampleNode) Wait added in v0.11.0 

func (n *SampleNode) Wait() error

type ShiftNode added in v0.11.0 

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

func (*ShiftNode) Barrier added in v1.4.0 

func (n *ShiftNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*ShiftNode) BatchPoint added in v1.4.0 

func (n *ShiftNode) BatchPoint(bp edge.BatchPointMessage) (edge.Message, error)

func (*ShiftNode) BeginBatch added in v1.4.0 

func (n *ShiftNode) BeginBatch(begin edge.BeginBatchMessage) (edge.Message, error)

func (*ShiftNode) DeleteGroup added in v1.4.0 

func (n *ShiftNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*ShiftNode) EndBatch added in v1.4.0 

func (n *ShiftNode) EndBatch(end edge.EndBatchMessage) (edge.Message, error)

func (*ShiftNode) Point added in v1.4.0 

func (n *ShiftNode) Point(p edge.PointMessage) (edge.Message, error)

func (*ShiftNode) Wait added in v0.11.0 

func (n *ShiftNode) Wait() error

type SideloadNode added in v1.4.0 

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

func (*SideloadNode) Barrier added in v1.4.0 

func (n *SideloadNode) Barrier(b edge.BarrierMessage) (edge.Message, error)

func (*SideloadNode) BatchPoint added in v1.4.0 

func (n *SideloadNode) BatchPoint(bp edge.BatchPointMessage) (edge.Message, error)

func (*SideloadNode) BeginBatch added in v1.4.0 

func (n *SideloadNode) BeginBatch(begin edge.BeginBatchMessage) (edge.Message, error)

func (*SideloadNode) DeleteGroup added in v1.4.0 

func (n *SideloadNode) DeleteGroup(d edge.DeleteGroupMessage) (edge.Message, error)

func (*SideloadNode) EndBatch added in v1.4.0 

func (n *SideloadNode) EndBatch(end edge.EndBatchMessage) (edge.Message, error)

func (*SideloadNode) Point added in v1.4.0 

func (n *SideloadNode) Point(p edge.PointMessage) (edge.Message, error)

func (*SideloadNode) Wait added in v1.4.0 

func (n *SideloadNode) Wait() error

type Socket added in v0.13.0 

type Socket interface {
	Open() error
	Close() error
	In() io.WriteCloser
	Out() io.Reader
}

func NewSocketConn added in v1.0.0 

func NewSocketConn(path string) Socket

type StateTrackingNode added in v1.3.0 

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

func (*StateTrackingNode) NewGroup added in v1.4.0 

func (n *StateTrackingNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*StateTrackingNode) Wait added in v1.3.0 

func (n *StateTrackingNode) Wait() error

type StatsNode added in v0.10.0 

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

func (*StatsNode) Wait added in v0.11.0 

func (n *StatsNode) Wait() error

type StreamCollector 

type StreamCollector interface {
	CollectPoint(edge.PointMessage) error
	Close() error
}

type StreamEdge added in v1.4.0 

type StreamEdge interface {
	CollectPoint(edge.PointMessage) error
	EmitPoint() (edge.PointMessage, bool)
	Close() error
}

type StreamNode 

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

func (*StreamNode) Wait added in v0.11.0 

func (n *StreamNode) Wait() error

type Task 

type Task struct {
	ID               string
	Pipeline         *pipeline.Pipeline
	Type             TaskType
	DBRPs            []DBRP
	SnapshotInterval time.Duration
}

The complete definition of a task, its id, pipeline and type.

func (*Task) Dot 

func (t *Task) Dot() []byte

func (*Task) Measurements added in v0.13.0 

func (t *Task) Measurements() []string

returns all the measurements from a FromNode

type TaskDiagnostic added in v1.4.0 

type TaskDiagnostic interface {
	WithNodeContext(node string) NodeDiagnostic

	Error(msg string, err error, ctx ...keyvalue.T)
}

type TaskMaster 

type TaskMaster struct {
	ServerInfo vars.Infoer

	HTTPDService interface {
		AddRoutes([]httpd.Route) error
		DelRoutes([]httpd.Route)
		URL() string
	}
	TaskStore interface {
		SaveSnapshot(id string, snapshot *TaskSnapshot) error
		HasSnapshot(id string) bool
		LoadSnapshot(id string) (*TaskSnapshot, error)
	}
	DeadmanService pipeline.DeadmanService

	UDFService UDFService

	AlertService interface {
		alertservice.AnonHandlerRegistrar
		alertservice.Events
		alertservice.TopicPersister
	}
	InfluxDBService interface {
		NewNamedClient(name string) (influxdb.Client, error)
	}
	SMTPService interface {
		Global() bool
		StateChangesOnly() bool
		Handler(smtp.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	MQTTService interface {
		Handler(mqtt.HandlerConfig, ...keyvalue.T) alert.Handler
	}

	OpsGenieService interface {
		Global() bool
		Handler(opsgenie.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	VictorOpsService interface {
		Global() bool
		Handler(victorops.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	PagerDutyService interface {
		Global() bool
		Handler(pagerduty.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	PushoverService interface {
		Handler(pushover.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	HTTPPostService interface {
		Handler(httppost.HandlerConfig, ...keyvalue.T) alert.Handler
		Endpoint(string) (*httppost.Endpoint, bool)
	}
	SlackService interface {
		Global() bool
		StateChangesOnly() bool
		Handler(slack.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	SNMPTrapService interface {
		Handler(snmptrap.HandlerConfig, ...keyvalue.T) (alert.Handler, error)
	}
	TelegramService interface {
		Global() bool
		StateChangesOnly() bool
		Handler(telegram.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	HipChatService interface {
		Global() bool
		StateChangesOnly() bool
		Handler(hipchat.HandlerConfig, ...keyvalue.T) alert.Handler
	}
	AlertaService interface {
		DefaultHandlerConfig() alerta.HandlerConfig
		Handler(alerta.HandlerConfig, ...keyvalue.T) (alert.Handler, error)
	}
	SensuService interface {
		Handler(sensu.HandlerConfig, ...keyvalue.T) (alert.Handler, error)
	}
	TalkService interface {
		Handler(...keyvalue.T) alert.Handler
	}
	TimingService interface {
		NewTimer(timer.Setter) timer.Timer
	}
	K8sService interface {
		Client(string) (k8s.Client, error)
	}
	SwarmService interface {
		Client(string) (swarm.Client, error)
	}
	EC2Service interface {
		Client(string) (ec2.Client, error)
	}

	SideloadService interface {
		Source(dir string) (sideload.Source, error)
	}

	Commander command.Commander

	DefaultRetentionPolicy string
	// contains filtered or unexported fields
}

An execution framework for a set of tasks.

func NewTaskMaster 

func NewTaskMaster(id string, info vars.Infoer, d Diagnostic) *TaskMaster

Create a new Executor with a given clock.

func (*TaskMaster) BatchCollectors 

func (tm *TaskMaster) BatchCollectors(id string) []BatchCollector

func (*TaskMaster) Close 

func (tm *TaskMaster) Close() error

func (*TaskMaster) CreateTICKScope added in v0.10.0 

func (tm *TaskMaster) CreateTICKScope() *stateful.Scope

func (*TaskMaster) DelFork 

func (tm *TaskMaster) DelFork(id string)

func (*TaskMaster) DeleteTask added in v1.2.0 

func (tm *TaskMaster) DeleteTask(id string) error

func (*TaskMaster) Drain added in v0.2.1 

func (tm *TaskMaster) Drain()

func (*TaskMaster) ExecutingDot added in v0.2.3 

func (tm *TaskMaster) ExecutingDot(id string, labels bool) string

func (*TaskMaster) ExecutionStats added in v0.11.0 

func (tm *TaskMaster) ExecutionStats(id string) (ExecutionStats, error)

func (*TaskMaster) ID added in v1.2.0 

func (tm *TaskMaster) ID() string

func (*TaskMaster) IsExecuting added in v0.2.1 

func (tm *TaskMaster) IsExecuting(id string) bool

func (*TaskMaster) New 

func (tm *TaskMaster) New(id string) *TaskMaster

Returns a new TaskMaster instance with the same services as the current one.

func (*TaskMaster) NewFork 

func (tm *TaskMaster) NewFork(taskName string, dbrps []DBRP, measurements []string) (edge.StatsEdge, error)

func (*TaskMaster) NewTask added in v0.10.0 

func (tm *TaskMaster) NewTask(
	id,
	script string,
	tt TaskType,
	dbrps []DBRP,
	snapshotInterval time.Duration,
	vars map[string]tick.Var,
) (*Task, error)

Create a new task in the context of a TaskMaster

func (*TaskMaster) NewTemplate added in v1.0.0 

func (tm *TaskMaster) NewTemplate(
	id,
	script string,
	tt TaskType,
) (*Template, error)

Create a new template in the context of a TaskMaster

func (*TaskMaster) Open 

func (tm *TaskMaster) Open() (err error)

func (*TaskMaster) SnapshotTask added in v0.10.0 

func (tm *TaskMaster) SnapshotTask(id string) (*TaskSnapshot, error)

func (*TaskMaster) StartTask 

func (tm *TaskMaster) StartTask(t *Task) (*ExecutingTask, error)

func (*TaskMaster) StopTask 

func (tm *TaskMaster) StopTask(id string) error

func (*TaskMaster) StopTasks added in v0.10.1 

func (tm *TaskMaster) StopTasks()

func (*TaskMaster) Stream 

func (tm *TaskMaster) Stream(name string) (StreamCollector, error)

func (*TaskMaster) WriteKapacitorPoint added in v1.3.0 

func (tm *TaskMaster) WriteKapacitorPoint(p edge.PointMessage) error

func (*TaskMaster) WritePoints added in v0.2.1 

func (tm *TaskMaster) WritePoints(database, retentionPolicy string, consistencyLevel imodels.ConsistencyLevel, points []imodels.Point) error

type TaskMasterLookup added in v1.0.0 

type TaskMasterLookup struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewTaskMasterLookup added in v1.0.0 

func NewTaskMasterLookup() *TaskMasterLookup

func (*TaskMasterLookup) Delete added in v1.0.0 

func (tml *TaskMasterLookup) Delete(tm *TaskMaster)

func (*TaskMasterLookup) Get added in v1.0.0 

func (tml *TaskMasterLookup) Get(id string) *TaskMaster

func (*TaskMasterLookup) Main added in v1.0.0 

func (tml *TaskMasterLookup) Main() *TaskMaster

func (*TaskMasterLookup) Set added in v1.0.0 

func (tml *TaskMasterLookup) Set(tm *TaskMaster)

type TaskSnapshot added in v0.10.0 

type TaskSnapshot struct {
	NodeSnapshots map[string][]byte
}

type TaskType 

type TaskType int

The type of a task 

const (
	StreamTask TaskType = iota
	BatchTask
	InvalidTask
)

func (TaskType) MarshalText added in v0.13.0 

func (t TaskType) MarshalText() ([]byte, error)

func (TaskType) String 

func (t TaskType) String() string

func (*TaskType) UnmarshalText added in v0.13.0 

func (t *TaskType) UnmarshalText(text []byte) error

type Template added in v1.0.0 

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

func (*Template) Dot added in v1.0.0 

func (t *Template) Dot() string

func (*Template) Vars added in v1.0.0 

func (t *Template) Vars() map[string]tick.Var

type TimeDimension added in v1.0.0 

type TimeDimension struct {
	Length time.Duration
	Offset time.Duration
}

type UDFNode added in v0.10.0 

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

User defined function

func (*UDFNode) Wait added in v0.11.0 

func (n *UDFNode) Wait() error

type UDFProcess added in v0.10.0 

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

UDFProcess wraps an external process and sends and receives data over STDIN and STDOUT. Lines received over STDERR are logged via normal Kapacitor logging.

func NewUDFProcess added in v0.10.0 

func NewUDFProcess(
	taskName, nodeName string,
	commander command.Commander,
	cmdSpec command.Spec,
	d udf.Diagnostic,
	timeout time.Duration,
	abortCallback func(),
) *UDFProcess

func (*UDFProcess) Abort added in v0.10.0 

func (p *UDFProcess) Abort(err error)

func (*UDFProcess) Close added in v0.13.0 

func (p *UDFProcess) Close() error

Stop the UDFProcess cleanly.

Calling Close should only be done once the owner has stopped writing to the *In channel, at which point the remaining data will be processed and the subprocess will be allowed to exit cleanly.

func (*UDFProcess) In added in v1.4.0 

func (p *UDFProcess) In() chan<- edge.Message

func (*UDFProcess) Info added in v0.10.0 

func (p *UDFProcess) Info() (udf.Info, error)

func (*UDFProcess) Init added in v0.10.0 

func (p *UDFProcess) Init(options []*agent.Option) error

func (*UDFProcess) Open added in v0.13.0 

func (p *UDFProcess) Open() error

Open the UDFProcess

func (*UDFProcess) Out added in v1.4.0 

func (p *UDFProcess) Out() <-chan edge.Message

func (*UDFProcess) Restore added in v0.10.0 

func (p *UDFProcess) Restore(snapshot []byte) error

func (*UDFProcess) Snapshot added in v0.10.0 

func (p *UDFProcess) Snapshot() ([]byte, error)

type UDFService added in v0.10.0 

type UDFService interface {
	List() []string
	Info(name string) (udf.Info, bool)
	Create(name, taskID, nodeID string, d udf.Diagnostic, abortCallback func()) (udf.Interface, error)
}

type UDFSocket added in v0.13.0 

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

func NewUDFSocket added in v0.13.0 

func NewUDFSocket(
	taskName, nodeName string,
	socket Socket,
	d udf.Diagnostic,
	timeout time.Duration,
	abortCallback func(),
) *UDFSocket

func (*UDFSocket) Abort added in v0.13.0 

func (s *UDFSocket) Abort(err error)

func (*UDFSocket) Close added in v0.13.0 

func (s *UDFSocket) Close() error

func (*UDFSocket) In added in v1.4.0 

func (s *UDFSocket) In() chan<- edge.Message

func (*UDFSocket) Info added in v0.13.0 

func (s *UDFSocket) Info() (udf.Info, error)

func (*UDFSocket) Init added in v0.13.0 

func (s *UDFSocket) Init(options []*agent.Option) error

func (*UDFSocket) Open added in v0.13.0 

func (s *UDFSocket) Open() error

func (*UDFSocket) Out added in v1.4.0 

func (s *UDFSocket) Out() <-chan edge.Message

func (*UDFSocket) Restore added in v0.13.0 

func (s *UDFSocket) Restore(snapshot []byte) error

func (*UDFSocket) Snapshot added in v0.13.0 

func (s *UDFSocket) Snapshot() ([]byte, error)

type UnionNode 

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

func (*UnionNode) Barrier added in v1.4.0 

func (n *UnionNode) Barrier(src int, b edge.BarrierMessage) error

func (*UnionNode) BufferedBatch added in v1.4.0 

func (n *UnionNode) BufferedBatch(src int, batch edge.BufferedBatchMessage) error

func (*UnionNode) Finish added in v1.4.0 

func (n *UnionNode) Finish() error

func (*UnionNode) Point added in v1.4.0 

func (n *UnionNode) Point(src int, p edge.PointMessage) error

func (*UnionNode) Wait added in v0.11.0 

func (n *UnionNode) Wait() error

type WhereNode 

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

func (*WhereNode) NewGroup added in v1.4.0 

func (n *WhereNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*WhereNode) Wait added in v0.11.0 

func (n *WhereNode) Wait() error

type WindowNode 

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

func (*WindowNode) DeleteGroup added in v1.4.0 

func (n *WindowNode) DeleteGroup(group models.GroupID)

func (*WindowNode) NewGroup added in v1.4.0 

func (n *WindowNode) NewGroup(group edge.GroupInfo, first edge.PointMeta) (edge.Receiver, error)

func (*WindowNode) Wait added in v0.11.0 

func (n *WindowNode) Wait() error

Source Files

View all Source files

Directories

Path Synopsis
Alert provides a framework for tracking events in a publish subscribe system.
 Alert provides a framework for tracking events in a publish subscribe system.
client
v1
Kapacitor HTTP API client written in Go
 Kapacitor HTTP API client written in Go
A clock that provides blocking calls that wait until absolute times have occurred.
 A clock that provides blocking calls that wait until absolute times have occurred.
cmd
kapacitor
kapacitord
kapacitord/help
kapacitord/run
commandtest
Package edge provides mechanisms for message passing along edges.
 Package edge provides mechanisms for message passing along edges.
This package is a fork of the golang expvar expvar.Var types.
 This package is a fork of the golang expvar expvar.Var types.
Contains integration and end-to-end tests
 Contains integration and end-to-end tests
Provides a set of structures for passing data around Kapacitor.
 Provides a set of structures for passing data around Kapacitor.
Provides an API for constructing data processing pipelines.
 Provides an API for constructing data processing pipelines.
tick
Provides a server type for starting and configuring a Kapacitor server.
 Provides a server type for starting and configuring a Kapacitor server.
vars
services
alert
Alert provides an implementation of the HTTP API for managing alert topics, handlers and events.
 Alert provides an implementation of the HTTP API for managing alert topics, handlers and events.
alert/alerttest
alerta
alerta/alertatest
azure
config
config/override
Overrider provides an API for overriding and reading redacted values for a configuration object.
 Overrider provides an API for overriding and reading redacted values for a configuration object.
consul
deadman
diagnostic
dns
ec2
ec2/client
file_discovery
gce
hipchat
hipchat/hipchattest
httpd
Provides an HTTP API exposing many components of Kapacitor.
 Provides an HTTP API exposing many components of Kapacitor.
httpd/httpdtest
httppost
httppost/httpposttest
influxdb
k8s
k8s/client
k8s/k8stest
load
marathon
mqtt
mqtt/mqtttest
nerve
noauth
opsgenie
opsgenie/opsgenietest
pagerduty
pagerduty/pagerdutytest
pushover
pushover/pushovertest
replay
reporting
Sends anonymous reports to InfluxData
 Sends anonymous reports to InfluxData
scraper
sensu
sensu/sensutest
serverset
servicetest
sideload
slack
slack/slacktest
smtp
smtp/smtptest
snmptrap
snmptrap/snmptraptest
static_discovery
stats
The stats service collects the exported stats and submits them to the Kapacitor stream under the configured database and retetion policy.
 The stats service collects the exported stats and submits them to the Kapacitor stream under the configured database and retetion policy.
storage
The storage package provides a key/value based interface for storing Kapacitor metadata.
 The storage package provides a key/value based interface for storing Kapacitor metadata.
storage/storagetest
swarm
swarm/client
swarm/swarmtest
talk
talk/talktest
task_store
telegram
telegram/telegramtest
triton
udf
udp
victorops
victorops/victoropstest
TICKscript is a simple invocation chaining DSL.
 TICKscript is a simple invocation chaining DSL.
ast
cmd/tickdoc
Tickdoc is a simple utility similar to godoc that generates documentation from comments.
 Tickdoc is a simple utility similar to godoc that generates documentation from comments.
cmd/tickfmt
stateful
udf
agent
Package agent is a generated protocol buffer package.
 Package agent is a generated protocol buffer package.
agent/examples/mirror
agent/examples/moving_avg
agent/examples/outliers
test
Package uuid generates and parses UUIDs.
 Package uuid generates and parses UUIDs.

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