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Allow setting a resource label prefix

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This allows setting a prefix on the labels used to determine which
resources a series belongs to.  The prefix may be set using the
`--label-prefix` flag.
This commit is contained in:
Solly Ross 2018-01-30 17:56:36 -05:00
parent 842b850fcd
commit 0fa0d36e17
5 changed files with 63 additions and 34 deletions
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8
cmd/adapter/app/start.go
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@ -82,6 +82,9 @@ func NewCommandStartPrometheusAdapterServer(out, errOut io.Writer, stopCh <-chan
"interval at which to refresh API discovery information")
flags.StringVar(&o.PrometheusURL, "prometheus-url", o.PrometheusURL,
"URL and configuration for connecting to Prometheus. Query parameters are used to configure the connection")
flags.StringVar(&o.LabelPrefix, "label-prefix", o.LabelPrefix,
"Prefix to expect on labels referring to pod resources. For example, if the prefix is "+
"'kube_', any series with the 'kube_pod' label would be considered a pod metric")
return cmd
}
@ -131,7 +134,7 @@ func (o PrometheusAdapterServerOptions) RunCustomMetricsAdapterServer(stopCh <-c
instrumentedGenericPromClient := mprom.InstrumentGenericAPIClient(genericPromClient, baseURL.String())
promClient := prom.NewClientForAPI(instrumentedGenericPromClient)
cmProvider := cmprov.NewPrometheusProvider(dynamicMapper, clientPool, promClient, o.MetricsRelistInterval, o.RateInterval, stopCh)
cmProvider := cmprov.NewPrometheusProvider(dynamicMapper, clientPool, promClient, o.LabelPrefix, o.MetricsRelistInterval, o.RateInterval, stopCh)
server, err := config.Complete().New("prometheus-custom-metrics-adapter", cmProvider)
if err != nil {
@ -153,4 +156,7 @@ type PrometheusAdapterServerOptions struct {
DiscoveryInterval time.Duration
// PrometheusURL is the URL describing how to connect to Prometheus. Query parameters configure connection options.
PrometheusURL string
// LabelPrefix is the prefix to expect on labels for Kubernetes resources
// (e.g. if the prefix is "kube_", we'd expect a "kube_pod" label for pod metrics).
LabelPrefix string
}