Merge pull request #1136 from dgrisonnet/prometheus-adapter-pdb

Add PodDisruptionBudget to prometheus-adapter

jsonnet/kube-prometheus/components/prometheus-adapter.libsonnet

@@ -300,4 +300,20 @@ function(params) {
       namespace: pa._config.namespace,
     }],
   },
+
+  [if (defaults + params).replicas > 1 then 'podDisruptionBudget']: {
+    apiVersion: 'policy/v1beta1',
+    kind: 'PodDisruptionBudget',
+    metadata: {
+      name: pa._config.name,
+      namespace: pa._config.namespace,
+      labels: pa._config.commonLabels,
+    },
+    spec: {
+      minAvailable: 1,
+      selector: {
+        matchLabels: pa._config.selectorLabels,
+      },
+    },
+  },
 }

kustomization.yaml

@@ -51,6 +51,7 @@ resources:
 - ./manifests/prometheus-adapter-clusterRoleServerResources.yaml
 - ./manifests/prometheus-adapter-configMap.yaml
 - ./manifests/prometheus-adapter-deployment.yaml
+- ./manifests/prometheus-adapter-podDisruptionBudget.yaml
 - ./manifests/prometheus-adapter-roleBindingAuthReader.yaml
 - ./manifests/prometheus-adapter-service.yaml
 - ./manifests/prometheus-adapter-serviceAccount.yaml

manifests/prometheus-adapter-podDisruptionBudget.yaml

+apiVersion: policy/v1beta1
+kind: PodDisruptionBudget
+metadata:
+  labels:
+    app.kubernetes.io/component: metrics-adapter
+    app.kubernetes.io/name: prometheus-adapter
+    app.kubernetes.io/part-of: kube-prometheus
+    app.kubernetes.io/version: 0.8.4
+  name: prometheus-adapter
+  namespace: monitoring
+spec:
+  minAvailable: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/component: metrics-adapter
+      app.kubernetes.io/name: prometheus-adapter
+      app.kubernetes.io/part-of: kube-prometheus