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* Add metrics support * Allow tests to bind to metric port * Add changelog * Fix imports
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Vivek Lakshmanan
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Oct 8, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| // Copyright 2021, Pulumi Corporation. All rights reserved. | ||
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| package stack | ||
|
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| import ( | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| pulumiv1alpha1 "github.com/pulumi/pulumi-kubernetes-operator/pkg/apis/pulumi/v1alpha1" | ||
| "sigs.k8s.io/controller-runtime/pkg/metrics" | ||
| ) | ||
|
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| var ( | ||
| numStacks prometheus.Gauge | ||
| numStacksFailing *prometheus.GaugeVec | ||
| ) | ||
|
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| func initMetrics() []prometheus.Collector { | ||
| var collectors []prometheus.Collector | ||
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| numStacks = prometheus.NewGauge(prometheus.GaugeOpts{ | ||
| Name: "stacks_active", | ||
| Help: "Number of stacks currently tracked by the Pulumi Kubernetes Operator", | ||
| }) | ||
| numStacksFailing = prometheus.NewGaugeVec( | ||
| prometheus.GaugeOpts{ | ||
| Name: "stacks_failing", | ||
| Help: "Number of stacks currently registered where the last reconcile failed", | ||
| }, | ||
| []string{"namespace", "name"}, | ||
| ) | ||
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| collectors = append(collectors, numStacks, numStacksFailing) | ||
| return collectors | ||
| } | ||
|
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| func init() { | ||
| // Register custom metrics with the global prometheus registry | ||
| metrics.Registry.MustRegister(initMetrics()...) | ||
| } | ||
|
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| func newStackCallback(obj interface{}) { | ||
| numStacks.Inc() | ||
| } | ||
|
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| func updateStackCallback(oldObj, newObj interface{}) { | ||
| oldStack, ok := oldObj.(*pulumiv1alpha1.Stack) | ||
| if !ok { | ||
| return | ||
| } | ||
|
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| newStack, ok := newObj.(*pulumiv1alpha1.Stack) | ||
| if !ok { | ||
| return | ||
| } | ||
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| // fresh transition to failure | ||
| if newStack.Status.LastUpdate != nil && newStack.Status.LastUpdate.State == pulumiv1alpha1.FailedStackStateMessage { | ||
| if oldStack.Status.LastUpdate == nil || oldStack.Status.LastUpdate.State != newStack.Status.LastUpdate.State { | ||
| numStacksFailing.With(prometheus.Labels{"namespace": oldStack.Namespace, "name": oldStack.Name}).Set(1) | ||
| } | ||
| } | ||
|
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| // transition to success from failure | ||
| if newStack.Status.LastUpdate != nil && newStack.Status.LastUpdate.State == pulumiv1alpha1.SucceededStackStateMessage { | ||
| if oldStack.Status.LastUpdate != nil && oldStack.Status.LastUpdate.State == pulumiv1alpha1.FailedStackStateMessage { | ||
| numStacksFailing.With(prometheus.Labels{"namespace": oldStack.Namespace, "name": oldStack.Name}).Set(0) | ||
| } | ||
| } | ||
| } | ||
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| func deleteStackCallback(oldObj interface{}) { | ||
| numStacks.Dec() | ||
| } |
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