telegraf

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Published: Jun 10, 2024 License: MIT Imports: 1 Imported by: 3,338

README

tiger Telegraf

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Telegraf is an agent for collecting, processing, aggregating, and writing metrics, logs, and other arbitrary data.

  • Offers a comprehensive suite of over 300 plugins, covering a wide range of functionalities including system monitoring, cloud services, and message passing
  • Enables the integration of user-defined code to collect, transform, and transmit data efficiently
  • Compiles into a standalone static binary without any external dependencies, ensuring a streamlined deployment process
  • Utilizes TOML for configuration, providing a user-friendly and unambiguous setup experience
  • Developed with contributions from a diverse community of over 1,200 contributors

Users can choose plugins from a wide range of topics, including but not limited to:

🔨 Installation

For binary builds, Docker images, RPM & DEB packages, and other builds of Telegraf, please see the install guide.

See the releases documentation for details on versioning and when releases are made.

💻 Usage

Users define a TOML configuration with the plugins and settings they wish to use, then pass that configuration to Telegraf. The Telegraf agent then collects data from inputs at each interval and sends data to outputs at each flush interval.

For a basic walkthrough see quick start.

📖 Documentation

For a full list of documentation including tutorials, reference and other material, start with the /docs directory.

Additionally, each plugin has its own README that includes details about how to configure, use, and sometimes debug or troubleshoot. Look under the /plugins directory for specific plugins.

Here are some commonly used documents:

❤️ Contribute

Contribute

We love our community of over 1,200 contributors! Many of the plugins included in Telegraf were originally contributed by community members. Check out our contributing guide if you are interested in helping out. Also, join us on our Community Slack or Community Forums if you have questions or comments for our engineering teams.

If you are completely new to Telegraf and InfluxDB, you can also enroll for free at InfluxDB university to take courses to learn more.

ℹ️ Support

Slack Forums

Please use the Community Slack or Community Forums if you have questions or comments for our engineering teams. GitHub issues are limited to actual issues and feature requests only.

📜 License

MIT

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Accumulator added in v0.2.0

type Accumulator interface {
	// AddFields adds a metric to the accumulator with the given measurement
	// name, fields, and tags (and timestamp). If a timestamp is not provided,
	// then the accumulator sets it to "now".
	AddFields(measurement string,
		fields map[string]interface{},
		tags map[string]string,
		t ...time.Time)

	// AddGauge is the same as AddFields, but will add the metric as a "Gauge" type
	AddGauge(measurement string,
		fields map[string]interface{},
		tags map[string]string,
		t ...time.Time)

	// AddCounter is the same as AddFields, but will add the metric as a "Counter" type
	AddCounter(measurement string,
		fields map[string]interface{},
		tags map[string]string,
		t ...time.Time)

	// AddSummary is the same as AddFields, but will add the metric as a "Summary" type
	AddSummary(measurement string,
		fields map[string]interface{},
		tags map[string]string,
		t ...time.Time)

	// AddHistogram is the same as AddFields, but will add the metric as a "Histogram" type
	AddHistogram(measurement string,
		fields map[string]interface{},
		tags map[string]string,
		t ...time.Time)

	// AddMetric adds a metric to the accumulator.
	AddMetric(Metric)

	// SetPrecision sets the timestamp rounding precision. All metrics
	// added to the accumulator will have their timestamp rounded to the
	// nearest multiple of precision.
	SetPrecision(precision time.Duration)

	// Report an error.
	AddError(err error)

	// Upgrade to a TrackingAccumulator with space for maxTracked
	// metrics/batches.
	WithTracking(maxTracked int) TrackingAccumulator
}

Accumulator allows adding metrics to the processing flow.

type AggregatingOutput added in v1.14.0

type AggregatingOutput interface {
	Output

	// Add the metric to the aggregator
	Add(in Metric)
	// Push returns the aggregated metrics and is called every flush interval.
	Push() []Metric
	// Reset signals that the aggregator period is completed.
	Reset()
}

AggregatingOutput adds aggregating functionality to an Output. May be used if the Output only accepts a fixed set of aggregations over a time period. These functions may be called concurrently to the Write function.

type Aggregator added in v1.14.0

type Aggregator interface {
	PluginDescriber

	// Add the metric to the aggregator.
	Add(in Metric)

	// Push pushes the current aggregates to the accumulator.
	Push(acc Accumulator)

	// Reset resets the aggregators caches and aggregates.
	Reset()
}

Aggregator is an interface for implementing an Aggregator plugin. the RunningAggregator wraps this interface and guarantees that Add, Push, and Reset can not be called concurrently, so locking is not required when implementing an Aggregator plugin.

type DeliveryInfo added in v1.14.0

type DeliveryInfo interface {
	// ID is the TrackingID
	ID() TrackingID

	// Delivered returns true if the metric was processed successfully.
	Delivered() bool
}

DeliveryInfo provides the results of a delivered metric group.

type DeprecationInfo added in v1.21.0

type DeprecationInfo struct {
	// Since specifies the version since when the plugin is deprecated
	Since string
	// RemovalIn optionally specifies the version when the plugin is scheduled for removal
	RemovalIn string
	// Notice for the user on suggested replacements etc.
	Notice string
}

DeprecationInfo contains information for marking a plugin deprecated.

type Field added in v1.14.0

type Field struct {
	Key   string
	Value interface{}
}

Field represents a single field key and value.

type Initializer added in v1.14.0

type Initializer interface {
	// Init performs one time setup of the plugin and returns an error if the
	// configuration is invalid.
	Init() error
}

Initializer is an interface that all plugin types: Inputs, Outputs, Processors, and Aggregators can optionally implement to initialize the plugin.

type Input added in v1.14.0

type Input interface {
	PluginDescriber

	// Gather takes in an accumulator and adds the metrics that the Input
	// gathers. This is called every agent.interval
	Gather(Accumulator) error
}

type LogLevel added in v1.31.0

type LogLevel int

LogLevel denotes the level for logging

const (
	// None means nothing is logged
	None LogLevel = iota
	// Error will log error messages
	Error
	// Warn will log error messages and warnings
	Warn
	// Info will log error messages, warnings and information messages
	Info
	// Debug will log all of the above and debugging messages issued by plugins
	Debug
)

func (LogLevel) String added in v1.31.0

func (e LogLevel) String() string

type Logger added in v1.14.0

type Logger interface {
	// Level returns the configured log-level of the logger
	Level() LogLevel

	// RegisterErrorCallback registers a callback triggered when logging errors
	RegisterErrorCallback(func())

	// Errorf logs an error message, patterned after log.Printf.
	Errorf(format string, args ...interface{})
	// Error logs an error message, patterned after log.Print.
	Error(args ...interface{})
	// Debugf logs a debug message, patterned after log.Printf.
	Debugf(format string, args ...interface{})
	// Debug logs a debug message, patterned after log.Print.
	Debug(args ...interface{})
	// Warnf logs a warning message, patterned after log.Printf.
	Warnf(format string, args ...interface{})
	// Warn logs a warning message, patterned after log.Print.
	Warn(args ...interface{})
	// Infof logs an information message, patterned after log.Printf.
	Infof(format string, args ...interface{})
	// Info logs an information message, patterned after log.Print.
	Info(args ...interface{})
}

Logger defines an plugin-related interface for logging.

type Metric added in v1.14.0

type Metric interface {
	// Name is the primary identifier for the Metric and corresponds to the
	// measurement in the InfluxDB data model.
	Name() string

	// Tags returns the tags as a map.  This method is deprecated, use TagList instead.
	Tags() map[string]string

	// TagList returns the tags as a slice ordered by the tag key in lexical
	// bytewise ascending order.  The returned value should not be modified,
	// use the AddTag or RemoveTag methods instead.
	TagList() []*Tag

	// Fields returns the fields as a map.  This method is deprecated, use FieldList instead.
	Fields() map[string]interface{}

	// FieldList returns the fields as a slice in an undefined order.  The
	// returned value should not be modified, use the AddField or RemoveField
	// methods instead.
	FieldList() []*Field

	// Time returns the timestamp of the metric.
	Time() time.Time

	// Type returns a general type for the entire metric that describes how you
	// might interpret, aggregate the values. Used by prometheus and statsd.
	Type() ValueType

	// SetName sets the metric name.
	SetName(name string)

	// AddPrefix adds a string to the front of the metric name.  It is
	// equivalent to m.SetName(prefix + m.Name()).
	//
	// This method is deprecated, use SetName instead.
	AddPrefix(prefix string)

	// AddSuffix appends a string to the back of the metric name.  It is
	// equivalent to m.SetName(m.Name() + suffix).
	//
	// This method is deprecated, use SetName instead.
	AddSuffix(suffix string)

	// GetTag returns the value of a tag and a boolean to indicate if it was set.
	GetTag(key string) (string, bool)

	// HasTag returns true if the tag is set on the Metric.
	HasTag(key string) bool

	// AddTag sets the tag on the Metric.  If the Metric already has the tag
	// set then the current value is replaced.
	AddTag(key, value string)

	// RemoveTag removes the tag if it is set.
	RemoveTag(key string)

	// GetField returns the value of a field and a boolean to indicate if it was set.
	GetField(key string) (interface{}, bool)

	// HasField returns true if the field is set on the Metric.
	HasField(key string) bool

	// AddField sets the field on the Metric.  If the Metric already has the field
	// set then the current value is replaced.
	AddField(key string, value interface{})

	// RemoveField removes the tag if it is set.
	RemoveField(key string)

	// SetTime sets the timestamp of the Metric.
	SetTime(t time.Time)

	// SetType sets the value-type of the Metric.
	SetType(t ValueType)

	// HashID returns an unique identifier for the series.
	HashID() uint64

	// Copy returns a deep copy of the Metric.
	Copy() Metric

	// Accept marks the metric as processed successfully and written to an
	// output.
	Accept()

	// Reject marks the metric as processed unsuccessfully.
	Reject()

	// Drop marks the metric as processed successfully without being written
	// to any output.
	Drop()
}

Metric is the type of data that is processed by Telegraf. Input plugins, and to a lesser degree, Processor and Aggregator plugins create new Metrics and Output plugins write them.

type Output added in v1.14.0

type Output interface {
	PluginDescriber

	// Connect to the Output; connect is only called once when the plugin starts
	Connect() error
	// Close any connections to the Output. Close is called once when the output
	// is shutting down. Close will not be called until all writes have finished,
	// and Write() will not be called once Close() has been, so locking is not
	// necessary.
	Close() error
	// Write takes in group of points to be written to the Output
	Write(metrics []Metric) error
}

type Parser added in v1.22.0

type Parser interface {
	// Parse takes a byte buffer separated by newlines
	// ie, `cpu.usage.idle 90\ncpu.usage.busy 10`
	// and parses it into telegraf metrics
	//
	// Must be thread-safe.
	Parse(buf []byte) ([]Metric, error)

	// ParseLine takes a single string metric
	// ie, "cpu.usage.idle 90"
	// and parses it into a telegraf metric.
	//
	// Must be thread-safe.
	ParseLine(line string) (Metric, error)

	// SetDefaultTags tells the parser to add all of the given tags
	// to each parsed metric.
	// NOTE: do _not_ modify the map after you've passed it here!!
	SetDefaultTags(tags map[string]string)
}

Parser is an interface defining functions that a parser plugin must satisfy.

type ParserFunc added in v1.22.0

type ParserFunc func() (Parser, error)

type ParserFuncPlugin added in v1.24.2

type ParserFuncPlugin interface {
	// GetParser returns a new parser.
	SetParserFunc(fn ParserFunc)
}

ParserFuncPlugin is an interface for plugins that are able to parse arbitrary data formats.

type ParserPlugin added in v1.24.2

type ParserPlugin interface {
	// SetParser sets the parser function for the interface
	SetParser(parser Parser)
}

ParserPlugin is an interface for plugins that are able to parse arbitrary data formats.

type PluginDescriber added in v1.15.0

type PluginDescriber interface {
	// SampleConfig returns the default configuration of the Plugin
	SampleConfig() string
}

PluginDescriber contains the functions all plugins must implement to describe themselves to Telegraf. Note that all plugins may define a logger that is not part of the interface, but will receive an injected logger if it's set. eg: Log telegraf.Logger `toml:"-"`

type PluginWithID added in v1.26.0

type PluginWithID interface {
	// ID returns the ID of the plugin instance. This function has to be
	// callable directly after the plugin's Init() function if there is any!
	ID() string
}

PluginWithID allows a plugin to overwrite its identifier of the plugin instance by a user specified value. By default the ID is generated using the plugin's configuration.

type Processor added in v1.14.0

type Processor interface {
	PluginDescriber

	// Apply the filter to the given metric.
	Apply(in ...Metric) []Metric
}

Processor is a processor plugin interface for defining new inline processors. these are extremely efficient and should be used over StreamingProcessor if you do not need asynchronous metric writes.

type ResolveFunc added in v1.25.0

type ResolveFunc func() ([]byte, bool, error)

ResolveFunc is a function to resolve the secret. The returned flag indicates if the resolver is static (false), i.e. the secret will not change over time, or dynamic (true) to handle secrets that change over time (e.g. TOTP).

type SecretStore added in v1.25.0

type SecretStore interface {
	Initializer
	PluginDescriber

	// Get searches for the given key and return the secret
	Get(key string) ([]byte, error)

	// Set sets the given secret for the given key
	Set(key, value string) error

	// List lists all known secret keys
	List() ([]string, error)

	// GetResolver returns a function to resolve the given key.
	GetResolver(key string) (ResolveFunc, error)
}

SecretStore is an interface defining functions that a secret-store plugin must satisfy.

type Serializer added in v1.27.0

type Serializer interface {
	// Serialize takes a single telegraf metric and turns it into a byte buffer.
	// separate metrics should be separated by a newline, and there should be
	// a newline at the end of the buffer.
	//
	// New plugins should use SerializeBatch instead to allow for non-line
	// delimited metrics.
	Serialize(metric Metric) ([]byte, error)

	// SerializeBatch takes an array of telegraf metric and serializes it into
	// a byte buffer.  This method is not required to be suitable for use with
	// line oriented framing.
	SerializeBatch(metrics []Metric) ([]byte, error)
}

Serializer is an interface defining functions that a serializer plugin must satisfy.

Implementations of this interface should be reentrant but are not required to be thread-safe.

type SerializerPlugin added in v1.27.0

type SerializerPlugin interface {
	// SetSerializer sets the serializer function for the interface.
	SetSerializer(serializer Serializer)
}

SerializerPlugin is an interface for plugins that are able to serialize telegraf metrics into arbitrary data formats.

type ServiceInput added in v1.14.0

type ServiceInput interface {
	Input

	// Start the ServiceInput.  The Accumulator may be retained and used until
	// Stop returns.
	Start(Accumulator) error

	// Stop stops the services and closes any necessary channels and connections.
	// Metrics should not be written out to the accumulator once stop returns, so
	// Stop() should stop reading and wait for any in-flight metrics to write out
	// to the accumulator before returning.
	Stop()
}

type StatefulPlugin added in v1.26.0

type StatefulPlugin interface {
	// GetState returns the current state of the plugin to persist
	// The returned state can be of any time as long as it can be
	// serialized to JSON. The best choice is a structure defined in
	// your plugin.
	// Note: This function has to be callable directly after the
	// plugin's Init() function if there is any!
	GetState() interface{}

	// SetState is called by the Persister once after loading and
	// initialization (after Init() function).
	SetState(state interface{}) error
}

StatefulPlugin contains the functions that plugins must implement to persist an internal state across Telegraf runs. Note that plugins may define a persister that is not part of the interface, but can be used to trigger state updates by the plugin if it exists in the plugin struct, eg: Persister telegraf.StatePersister `toml:"-"`

type StreamingProcessor added in v1.15.0

type StreamingProcessor interface {
	PluginDescriber

	// Start is called once when the plugin starts; it is only called once per
	// plugin instance, and never in parallel.
	// Start should return once it is ready to receive metrics.
	// The passed in accumulator is the same as the one passed to Add(), so you
	// can choose to save it in the plugin, or use the one received from Add().
	Start(acc Accumulator) error

	// Add is called for each metric to be processed. The Add() function does not
	// need to wait for the metric to be processed before returning, and it may
	// be acceptable to let background goroutine(s) handle the processing if you
	// have slow processing you need to do in parallel.
	// Keep in mind Add() should not spawn unbounded goroutines, so you may need
	// to use a semaphore or pool of workers (eg: reverse_dns plugin does this)
	// Metrics you don't want to pass downstream should have metric.Drop() called,
	// rather than simply omitting the acc.AddMetric() call
	Add(metric Metric, acc Accumulator) error

	// Stop gives you an opportunity to gracefully shut down the processor.
	// Once Stop() is called, Add() will not be called any more. If you are using
	// goroutines, you should wait for any in-progress metrics to be processed
	// before returning from Stop().
	// When stop returns, you should no longer be writing metrics to the
	// accumulator.
	Stop()
}

StreamingProcessor is a processor that can take in a stream of messages

type Tag added in v1.14.0

type Tag struct {
	Key   string
	Value string
}

Tag represents a single tag key and value.

type TemplateMetric added in v1.26.0

type TemplateMetric interface {
	Name() string
	Field(key string) interface{}
	Fields() map[string]interface{}
	Tag(key string) string
	Tags() map[string]string
	Time() time.Time
	String() string
}

TemplateMetric is an interface to use in templates (e.g text/template) to generate complex strings from metric properties e.g. '{{.Name}}-{{.Tag "foo"}}-{{.Field "bar"}}'

type TrackingAccumulator added in v1.14.0

type TrackingAccumulator interface {
	Accumulator

	// Add the Metric and arrange for tracking feedback after processing.
	AddTrackingMetric(m Metric) TrackingID

	// Add a group of Metrics and arrange for a signal when the group has been
	// processed.
	AddTrackingMetricGroup(group []Metric) TrackingID

	// Delivered returns a channel that will contain the tracking results.
	Delivered() <-chan DeliveryInfo
}

TrackingAccumulator is an Accumulator that provides a signal when the metric has been fully processed. Sending more metrics than the accumulator has been allocated for without reading status from the Accepted or Rejected channels is an error.

type TrackingID added in v1.14.0

type TrackingID uint64

TrackingID uniquely identifies a tracked metric group

type TrackingMetric added in v1.29.0

type TrackingMetric interface {
	// TrackingID returns the ID used for tracking the metric
	TrackingID() TrackingID
	UnwrappableMetric
}

type UnwrappableMetric added in v1.28.2

type UnwrappableMetric interface {
	// Unwrap allows to access the underlying raw metric if an implementation
	// wraps it in the first place.
	Unwrap() Metric
}

type ValueType added in v1.14.0

type ValueType int

ValueType is an enumeration of metric types that represent a simple value.

const (
	Counter ValueType
	Gauge
	Untyped
	Summary
	Histogram
)

Possible values for the ValueType enum.

Directories

Path Synopsis
cmd
telegraf
Command handling for configuration "config" command
Command handling for configuration "config" command
choice
Package choice provides basic functions for working with plugin options that must be one of several values.
Package choice provides basic functions for working with plugin options that must be one of several values.
all
plugins
inputs/docker
Package docker contains few helper functions copied from https://github.com/docker/cli/blob/master/cli/command/container/stats_helpers.go
Package docker contains few helper functions copied from https://github.com/docker/cli/blob/master/cli/command/container/stats_helpers.go
inputs/lustre2
Package lustre2 (doesn't aim for Windows) Lustre 2.x Telegraf plugin Lustre (http://lustre.org/) is an open-source, parallel file system for HPC environments.
Package lustre2 (doesn't aim for Windows) Lustre 2.x Telegraf plugin Lustre (http://lustre.org/) is an open-source, parallel file system for HPC environments.
inputs/neptune_apex
Package neptune_apex implements an input plugin for the Neptune Apex aquarium controller.
Package neptune_apex implements an input plugin for the Neptune Apex aquarium controller.
inputs/openstack
Package openstack implements an OpenStack input plugin for Telegraf
Package openstack implements an OpenStack input plugin for Telegraf
inputs/phpfpm
Package phpfpm implements the FastCGI protocol.
Package phpfpm implements the FastCGI protocol.
inputs/uwsgi
Package uwsgi implements a telegraf plugin for collecting uwsgi stats from the uwsgi stats server.
Package uwsgi implements a telegraf plugin for collecting uwsgi stats from the uwsgi stats server.
inputs/x509_cert
Package x509_cert reports metrics from an SSL certificate.
Package x509_cert reports metrics from an SSL certificate.
inputs/zipkin/cmd/thrift_serialize
A small cli utility meant to convert json to zipkin thrift binary format, and vice versa.
A small cli utility meant to convert json to zipkin thrift binary format, and vice versa.
outputs/application_insights/mocks
Code generated by mockery v1.0.0.
Code generated by mockery v1.0.0.
outputs/postgresql/sqltemplate
Package sqltemplate
Package sqltemplate
Package selfstat is a package for tracking and collecting internal statistics about telegraf.
Package selfstat is a package for tracking and collecting internal statistics about telegraf.
tools
readme_config_includer
This is a tool to embed configuration files into the README.md of all plugins It searches for TOML sections in the plugins' README.md and detects includes specified in the form
This is a tool to embed configuration files into the README.md of all plugins It searches for TOML sections in the plugins' README.md and detects includes specified in the form

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