metrics

package
v0.26.2 Latest Latest
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 Go to latest Published: Aug 27, 2018 License: MIT Imports: 17 Imported by: 0

Documentation

Overview

Package metrics contains a type for aggregating and propagating metrics to various services based on configuration.

Index

Constants

View Source 
const (
	TypeHTTPServer = "http_server"
	TypePrometheus = "prometheus"
	TypeStatsd     = "statsd"
)

String constants representing each metric type.

Variables

View Source 
var (
	ErrInvalidMetricOutputType = errors.New("invalid metrics output type")
)

Errors for the metrics package.

View Source 
var (
	ErrTimedOut = errors.New("timed out")
)

Errors for the HTTP type.

Functions

func Descriptions 

func Descriptions() string

Descriptions returns a formatted string of collated descriptions of each type.

func OptSetLogger 

func OptSetLogger(log log.Modular) func(Type)

OptSetLogger sets the logging output to be used by the metrics clients.

func SanitiseConfig 

func SanitiseConfig(conf Config) (interface{}, error)

SanitiseConfig returns a sanitised version of the Config, meaning sections that aren't relevant to behaviour are removed.

Types

type Config 

type Config struct {
	Type       string       `json:"type" yaml:"type"`
	Prefix     string       `json:"prefix" yaml:"prefix"`
	HTTP       struct{}     `json:"http_server" yaml:"http_server"`
	Prometheus struct{}     `json:"prometheus" yaml:"prometheus"`
	Statsd     StatsdConfig `json:"statsd" yaml:"statsd"`
}

Config is the all encompassing configuration struct for all metric output types.

func NewConfig 

func NewConfig() Config

NewConfig returns a configuration struct fully populated with default values.

type DudStat 

type DudStat struct{}

DudStat implements the Stat interface but doesn't actual do anything.

func (DudStat) Decr 

func (d DudStat) Decr(count int64) error

Decr does nothing.

func (DudStat) Incr 

func (d DudStat) Incr(count int64) error

Incr does nothing.

func (DudStat) Set 

func (d DudStat) Set(value int64) error

Set does nothing.

func (DudStat) Timing 

func (d DudStat) Timing(delta int64) error

Timing does nothing.

type DudType 

type DudType struct {
	ID int
}

DudType implements the Type interface but doesn't actual do anything.

func Noop 

func Noop() DudType

Noop returns a DudType for discarding metrics.

func (DudType) Close 

func (d DudType) Close() error

Close does nothing.

func (DudType) GetCounter 

func (d DudType) GetCounter(path string) StatCounter

GetCounter returns a DudStat.

func (DudType) GetCounterVec 

func (d DudType) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a DudStat.

func (DudType) GetGauge 

func (d DudType) GetGauge(path string) StatGauge

GetGauge returns a DudStat.

func (DudType) GetGaugeVec 

func (d DudType) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a DudStat.

func (DudType) GetTimer 

func (d DudType) GetTimer(path string) StatTimer

GetTimer returns a DudStat.

func (DudType) GetTimerVec 

func (d DudType) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a DudStat.

func (DudType) SetLogger 

func (d DudType) SetLogger(log log.Modular)

SetLogger does nothing.

type Flat 

type Flat interface {
	// Flat is an interface for setting metrics via flat paths.
	// Incr increments a metric by an amount.
	Incr(path string, count int64) error

	// Decr decrements a metric by an amount.
	Decr(path string, count int64) error

	// Timing sets a timing metric.
	Timing(path string, delta int64) error

	// Gauge sets a gauge metric.
	Gauge(path string, value int64) error

	// Close stops aggregating stats and cleans up resources.
	Close() error
}

Flat is an interface for setting metrics via flat paths.

type HTTP 

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

HTTP is an object with capability to hold internal stats as a JSON endpoint.

func (*HTTP) Close 

func (h *HTTP) Close() error

Close stops the HTTP object from aggregating metrics and cleans up resources.

func (*HTTP) GetCounter 

func (h *HTTP) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*HTTP) GetCounterVec 

func (h *HTTP) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*HTTP) GetGauge 

func (h *HTTP) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*HTTP) GetGaugeVec 

func (h *HTTP) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*HTTP) GetTimer 

func (h *HTTP) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*HTTP) GetTimerVec 

func (h *HTTP) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*HTTP) HandlerFunc 

func (h *HTTP) HandlerFunc() http.HandlerFunc

HandlerFunc returns an http.HandlerFunc for accessing metrics as a JSON blob.

func (*HTTP) SetLogger 

func (h *HTTP) SetLogger(log log.Modular)

SetLogger does nothing.

type Local 

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

Local is a metrics aggregator that stores metrics locally.

func NewLocal 

func NewLocal() *Local

NewLocal creates and returns a new Local aggregator.

func (*Local) Close 

func (l *Local) Close() error

Close stops the Local object from aggregating metrics and cleans up resources.

func (*Local) GetCounter 

func (l *Local) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Local) GetCounterVec 

func (l *Local) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*Local) GetCounters 

func (l *Local) GetCounters() map[string]int64

GetCounters returns a map of metric paths to counters.

func (*Local) GetGauge 

func (l *Local) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Local) GetGaugeVec 

func (l *Local) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Local) GetTimer 

func (l *Local) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Local) GetTimerVec 

func (l *Local) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*Local) GetTimings 

func (l *Local) GetTimings() map[string]int64

GetTimings returns a map of metric paths to timers.

func (*Local) SetLogger 

func (l *Local) SetLogger(log log.Modular)

SetLogger does nothing.

type LocalStat 

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

LocalStat is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*LocalStat) Decr 

func (l *LocalStat) Decr(count int64) error

Decr decrements a metric by an amount.

func (*LocalStat) Incr 

func (l *LocalStat) Incr(count int64) error

Incr increments a metric by an amount.

func (*LocalStat) Set 

func (l *LocalStat) Set(value int64) error

Set sets a gauge metric.

func (*LocalStat) Timing 

func (l *LocalStat) Timing(delta int64) error

Timing sets a timing metric.

type PromCounter 

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

PromCounter is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*PromCounter) Incr 

func (p *PromCounter) Incr(count int64) error

Incr increments a metric by an amount.

type PromCounterVec 

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

PromCounterVec creates StatCounters with dynamic labels.

func (*PromCounterVec) With 

func (p *PromCounterVec) With(labelValues ...string) StatCounter

With returns a StatCounter with a set of label values.

type PromGauge 

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

PromGauge is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*PromGauge) Decr 

func (p *PromGauge) Decr(count int64) error

Decr decrements a metric by an amount.

func (*PromGauge) Incr 

func (p *PromGauge) Incr(count int64) error

Incr increments a metric by an amount.

func (*PromGauge) Set 

func (p *PromGauge) Set(value int64) error

Set sets a gauge metric.

type PromGaugeVec 

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

PromGaugeVec creates StatGauges with dynamic labels.

func (*PromGaugeVec) With 

func (p *PromGaugeVec) With(labelValues ...string) StatGauge

With returns a StatGauge with a set of label values.

type PromTiming 

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

PromTiming is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*PromTiming) Timing 

func (p *PromTiming) Timing(val int64) error

Timing sets a timing metric.

type PromTimingVec 

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

PromTimingVec creates StatTimers with dynamic labels.

func (*PromTimingVec) With 

func (p *PromTimingVec) With(labelValues ...string) StatTimer

With returns a StatTimer with a set of label values.

type Prometheus 

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

Prometheus is a stats object with capability to hold internal stats as a JSON endpoint.

func (*Prometheus) Close 

func (p *Prometheus) Close() error

Close stops the Prometheus object from aggregating metrics and cleans up resources.

func (*Prometheus) GetCounter 

func (p *Prometheus) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Prometheus) GetCounterVec 

func (p *Prometheus) GetCounterVec(path string, labelNames []string) StatCounterVec

GetCounterVec returns an editable counter stat for a given path with labels, these labels must be consistent with any other metrics registered on the same path.

func (*Prometheus) GetGauge 

func (p *Prometheus) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Prometheus) GetGaugeVec 

func (p *Prometheus) GetGaugeVec(path string, labelNames []string) StatGaugeVec

GetGaugeVec returns an editable gauge stat for a given path with labels, these labels must be consistent with any other metrics registered on the same path.

func (*Prometheus) GetTimer 

func (p *Prometheus) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Prometheus) GetTimerVec 

func (p *Prometheus) GetTimerVec(path string, labelNames []string) StatTimerVec

GetTimerVec returns an editable timer stat for a given path with labels, these labels must be consistent with any other metrics registered on the same path.

func (*Prometheus) HandlerFunc 

func (p *Prometheus) HandlerFunc() http.HandlerFunc

HandlerFunc returns an http.HandlerFunc for scraping metrics.

func (*Prometheus) SetLogger 

func (p *Prometheus) SetLogger(log log.Modular)

SetLogger does nothing.

type PrometheusConfig 

type PrometheusConfig struct {
}

PrometheusConfig is config for the Prometheus metrics type.

func NewPrometheusConfig 

func NewPrometheusConfig() PrometheusConfig

NewPrometheusConfig creates an PrometheusConfig struct with default values.

type StatCounter 

type StatCounter interface {
	// Incr increments a counter by an amount.
	Incr(count int64) error
}

StatCounter is a representation of a single counter metric stat. Interactions with this stat are thread safe.

type StatCounterVec 

type StatCounterVec interface {
	// With returns a StatCounter with a set of label values.
	With(labelValues ...string) StatCounter
}

StatCounterVec creates StatCounters with dynamic labels.

type StatGauge 

type StatGauge interface {
	// Set sets the value of a gauge metric.
	Set(value int64) error

	// Incr increments a gauge by an amount.
	Incr(count int64) error

	// Decr decrements a gauge by an amount.
	Decr(count int64) error
}

StatGauge is a representation of a single gauge metric stat. Interactions with this stat are thread safe.

type StatGaugeVec 

type StatGaugeVec interface {
	// With returns a StatGauge with a set of label values.
	With(labelValues ...string) StatGauge
}

StatGaugeVec creates StatGauges with dynamic labels.

type StatTimer 

type StatTimer interface {
	// Timing sets a timing metric.
	Timing(delta int64) error
}

StatTimer is a representation of a single timer metric stat. Interactions with this stat are thread safe.

type StatTimerVec 

type StatTimerVec interface {
	// With returns a StatTimer with a set of label values.
	With(labelValues ...string) StatTimer
}

StatTimerVec creates StatTimers with dynamic labels.

type Statsd 

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

Statsd is a stats object with capability to hold internal stats as a JSON endpoint.

func (*Statsd) Close 

func (h *Statsd) Close() error

Close stops the Statsd object from aggregating metrics and cleans up resources.

func (*Statsd) GetCounter 

func (h *Statsd) GetCounter(path string) StatCounter

GetCounter returns a stat counter object for a path.

func (*Statsd) GetCounterVec 

func (h *Statsd) GetCounterVec(path string, n []string) StatCounterVec

GetCounterVec returns a stat counter object for a path with the labels discarded.

func (*Statsd) GetGauge 

func (h *Statsd) GetGauge(path string) StatGauge

GetGauge returns a stat gauge object for a path.

func (*Statsd) GetGaugeVec 

func (h *Statsd) GetGaugeVec(path string, n []string) StatGaugeVec

GetGaugeVec returns a stat timer object for a path with the labels discarded.

func (*Statsd) GetTimer 

func (h *Statsd) GetTimer(path string) StatTimer

GetTimer returns a stat timer object for a path.

func (*Statsd) GetTimerVec 

func (h *Statsd) GetTimerVec(path string, n []string) StatTimerVec

GetTimerVec returns a stat timer object for a path with the labels discarded.

func (*Statsd) SetLogger 

func (h *Statsd) SetLogger(log log.Modular)

SetLogger sets the logger used to print connection errors.

type StatsdConfig 

type StatsdConfig struct {
	Address     string `json:"address" yaml:"address"`
	FlushPeriod string `json:"flush_period" yaml:"flush_period"`
	Network     string `json:"network" yaml:"network"`
}

StatsdConfig is config for the Statsd metrics type.

func NewStatsdConfig 

func NewStatsdConfig() StatsdConfig

NewStatsdConfig creates an StatsdConfig struct with default values.

type StatsdStat 

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

StatsdStat is a representation of a single metric stat. Interactions with this stat are thread safe.

func (*StatsdStat) Decr 

func (s *StatsdStat) Decr(count int64) error

Decr decrements a metric by an amount.

func (*StatsdStat) Incr 

func (s *StatsdStat) Incr(count int64) error

Incr increments a metric by an amount.

func (*StatsdStat) Set 

func (s *StatsdStat) Set(value int64) error

Set sets a gauge metric.

func (*StatsdStat) Timing 

func (s *StatsdStat) Timing(delta int64) error

Timing sets a timing metric.

type Type 

type Type interface {
	// GetCounter returns an editable counter stat for a given path.
	GetCounter(path string) StatCounter

	// GetCounterVec returns an editable counter stat for a given path with
	// labels, these labels must be consistent with any other metrics registered
	// on the same path.
	GetCounterVec(path string, labelNames []string) StatCounterVec

	// GetTimer returns an editable timer stat for a given path.
	GetTimer(path string) StatTimer

	// GetTimerVec returns an editable timer stat for a given path with labels,
	// these labels must be consistent with any other metrics registered on the
	// same path.
	GetTimerVec(path string, labelNames []string) StatTimerVec

	// GetGauge returns an editable gauge stat for a given path.
	GetGauge(path string) StatGauge

	// GetGaugeVec returns an editable gauge stat for a given path with labels,
	// these labels must be consistent with any other metrics registered on the
	// same path.
	GetGaugeVec(path string, labelNames []string) StatGaugeVec

	// SetLogger sets the logging mechanism of the metrics type.
	SetLogger(log log.Modular)

	// Close stops aggregating stats and cleans up resources.
	Close() error
}

Type is an interface for metrics aggregation.

func Combine 

func Combine(t1, t2 Type) Type

Combine returns a Type implementation that feeds metrics into two underlying Type implementations.

func Namespaced 

func Namespaced(t Type, ns string) Type

Namespaced embeds an existing metrics aggregator under a new namespace. The prefix of the embedded aggregator is still the ultimate prefix of metrics.

func New 

func New(conf Config, opts ...func(Type)) (Type, error)

New creates a metric output type based on a configuration.

func NewHTTP 

func NewHTTP(config Config, opts ...func(Type)) (Type, error)

NewHTTP creates and returns a new HTTP object.

func NewPrometheus 

func NewPrometheus(config Config, opts ...func(Type)) (Type, error)

NewPrometheus creates and returns a new Prometheus object.

func NewStatsd 

func NewStatsd(config Config, opts ...func(Type)) (Type, error)

NewStatsd creates and returns a new Statsd object.

func WrapFlat 

func WrapFlat(f Flat) Type

WrapFlat creates a Type around a Flat implementation.

type WithHandlerFunc 

type WithHandlerFunc interface {
	HandlerFunc() http.HandlerFunc
}

WithHandlerFunc is an interface for metrics types that can expose their metrics through an HTTP HandlerFunc endpoint. If a Type can be cast into WithHandlerFunc then you should register its endpoint to the an HTTP server.

Source Files

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