promclient

Documentation

Index

• Variables
• func ExternalLabels(ctx context.Context, logger log.Logger, base *url.URL) (labels.Labels, error)
• func IsWALDirAccesible(dir string) error
• func MetricValues(ctx context.Context, logger log.Logger, base *url.URL, ...) error
• func PromqlQueryInstant(ctx context.Context, logger log.Logger, base *url.URL, query string, ...) (promql.Vector, []string, error)
• func QueryInstant(ctx context.Context, logger log.Logger, base *url.URL, query string, ...) (model.Vector, []string, error)
• func Snapshot(ctx context.Context, logger log.Logger, base *url.URL, skipHead bool) (string, error)
• type Flags
  • func ConfiguredFlags(ctx context.Context, logger log.Logger, base *url.URL) (Flags, error)
  • func (f *Flags) UnmarshalJSON(b []byte) error
• type QueryOptions
  • func (p *QueryOptions) AddTo(values url.Values) error

Variables

var ErrFlagEndpointNotFound = errors.New("no flag endpoint found")

Functions

func ExternalLabels

func ExternalLabels(ctx context.Context, logger log.Logger, base *url.URL) (labels.Labels, error)

ExternalLabels returns external labels from /api/v1/status/config Prometheus endpoint. Note that configuration can be hot reloadable on Prometheus, so this config might change in runtime.

func IsWALDirAccesible

func IsWALDirAccesible(dir string) error

IsWALDirAccesible returns no error if WAL dir can be found. This helps to tell if we have access to Prometheus TSDB directory.

func MetricValues

func MetricValues(ctx context.Context, logger log.Logger, base *url.URL, perMetricFn func(metric promlabels.Labels, val float64) error) error

MetricValues returns current value of instant query and returns results in model.Vector type.

func PromqlQueryInstant

func PromqlQueryInstant(ctx context.Context, logger log.Logger, base *url.URL, query string, t time.Time, opts QueryOptions) (promql.Vector, []string, error)

PromqlQueryInstant performs instant query and returns results in promql.Vector type that is compatible with promql package.

func QueryInstant

func QueryInstant(ctx context.Context, logger log.Logger, base *url.URL, query string, t time.Time, opts QueryOptions) (model.Vector, []string, error)

QueryInstant performs instant query and returns results in model.Vector type.

func Snapshot

func Snapshot(ctx context.Context, logger log.Logger, base *url.URL, skipHead bool) (string, error)

Snapshot will request Prometheus to perform snapshot in directory returned by this function. Returned directory is relative to Prometheus data-dir. NOTE: `--web.enable-admin-api` flag has to be set on Prometheus. Added to Prometheus from v2.1. TODO(bwplotka): Add metrics.

Types

type Flags

type Flags struct {
	TSDBPath           string         `json:"storage.tsdb.path"`
	TSDBRetention      model.Duration `json:"storage.tsdb.retention"`
	TSDBMinTime        model.Duration `json:"storage.tsdb.min-block-duration"`
	TSDBMaxTime        model.Duration `json:"storage.tsdb.max-block-duration"`
	WebEnableAdminAPI  bool           `json:"web.enable-admin-api"`
	WebEnableLifecycle bool           `json:"web.enable-lifecycle"`
}

func ConfiguredFlags

func ConfiguredFlags(ctx context.Context, logger log.Logger, base *url.URL) (Flags, error)

ConfiguredFlags returns configured flags from /api/v1/status/flags Prometheus endpoint. Added to Prometheus from v2.2.

func (*Flags) UnmarshalJSON

func (f *Flags) UnmarshalJSON(b []byte) error

UnmarshalJSON implements the json.Unmarshaler interface.

type QueryOptions

type QueryOptions struct {
	Deduplicate             bool
	PartialResponseStrategy storepb.PartialResponseStrategy
}

func (*QueryOptions) AddTo

func (p *QueryOptions) AddTo(values url.Values) error