prometheus

Documentation

Index

• Constants
• type Handler
  • func NewHandler(h herodot.Writer, version string) *Handler
  • func (h *Handler) Metrics(rw http.ResponseWriter, r *http.Request, _ httprouter.Params)
  • func (h *Handler) SetRoutes(r *httprouter.Router)
• type Metrics
  • func NewMetrics(app, metricsPrefix, version, hash, date string) *Metrics
  • func (h *Metrics) Collect(in chan<- prometheus.Metric)
  • func (h *Metrics) Describe(in chan<- *prometheus.Desc)
  • func (h Metrics) Instrument(rw http.ResponseWriter, next http.HandlerFunc, endpoint string) http.HandlerFunc
• type MetricsManager
  • func NewMetricsManager(app, version, hash, buildTime string) *MetricsManager
  • func NewMetricsManagerWithPrefix(app, metricsPrefix, version, hash, buildTime string) *MetricsManager
  • func (pmm *MetricsManager) RegisterRouter(router *httprouter.Router)
  • func (pmm *MetricsManager) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)

Constants

const GRPCMetrics = "grpc"

const HTTPMetrics = "http"

const (
	MetricsPrometheusPath = "/metrics/prometheus"
)

Types

type Handler

type Handler struct {
	H             herodot.Writer
	VersionString string
}

Handler handles HTTP requests to health and version endpoints.

func NewHandler

func NewHandler(
	h herodot.Writer,
	version string,
) *Handler

NewHandler instantiates a handler.

func (*Handler) Metrics

func (h *Handler) Metrics(rw http.ResponseWriter, r *http.Request, _ httprouter.Params)

Metrics outputs prometheus metrics

swagger:route GET /metrics/prometheus metadata prometheus

Get snapshot metrics from the service. If you're using k8s, you can then add annotations to your deployment like so:

``` metadata:

annotations:
  prometheus.io/port: "4434"
    prometheus.io/path: "/metrics/prometheus"

```

Produces:
- plain/text

Responses:
  200: emptyResponse

func (*Handler) SetRoutes

func (h *Handler) SetRoutes(r *httprouter.Router)

SetRoutes registers this handler's routes.

type Metrics

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

Metrics prototypes

func NewMetrics

func NewMetrics(app, metricsPrefix, version, hash, date string) *Metrics

NewMetrics creates new custom Prometheus metrics

func (*Metrics) Collect

func (h *Metrics) Collect(in chan<- prometheus.Metric)

Collect implements prometheus Collector interface.

func (*Metrics) Describe

func (h *Metrics) Describe(in chan<- *prometheus.Desc)

Describe implements prometheus Collector interface.

func (Metrics) Instrument

func (h Metrics) Instrument(rw http.ResponseWriter, next http.HandlerFunc, endpoint string) http.HandlerFunc

Instrument will instrument any http.HandlerFunc with custom metrics

type MetricsManager

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

func NewMetricsManager

func NewMetricsManager(app, version, hash, buildTime string) *MetricsManager

func NewMetricsManagerWithPrefix

func NewMetricsManagerWithPrefix(app, metricsPrefix, version, hash, buildTime string) *MetricsManager

NewMetricsManagerWithPrefix creates MetricsManager that uses metricsPrefix parameters as a prefix for all metrics registered within this middleware. Constants HttpMetrics or GrpcMetrics can be used respectively. Setting empty string in metricsPrefix will be equivalent to calling NewMetricsManager.

func (*MetricsManager) RegisterRouter

func (pmm *MetricsManager) RegisterRouter(router *httprouter.Router)

func (*MetricsManager) ServeHTTP

func (pmm *MetricsManager) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc)

Main middleware method to collect metrics for Prometheus.