Enable high availability (HA) configuration for ASO

v2/charts/azure-service-operator/templates/apps_v1_deployment_azureserviceoperator-controller-manager.yaml

@@ -12,7 +12,7 @@ metadata:
   name: azureserviceoperator-controller-manager
   namespace: {{ .Release.Namespace }}
 spec:
-  replicas: 1
+  replicas: {{ .Values.replicaCount }}
   revisionHistoryLimit: {{ .Values.revisionHistoryLimit }}
   selector:
     matchLabels:

v2/charts/azure-service-operator/templates/policy_v1_ poddisruptionbudget_azureserviceoperator-pdb.yaml

@@ -0,0 +1,15 @@
+{{- if .Values.podDisruptionBudget.enabled }}
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  labels:
+    app.kubernetes.io/name: azure-service-operator
+    control-plane: controller-manager
+  name: azureserviceoperator-pdb
+  namespace: {{ .Release.Namespace }}
+spec:
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+  minAvailable: {{ .Values.podDisruptionBudget.minAvailable }}
+{{- end }}

v2/charts/azure-service-operator/values.yaml

@@ -166,6 +166,13 @@ nodeSelector:
 # podAnnotations contain the pod annotations for Azure Service Operator
 podAnnotations: {}
 
+# Enable the pod disruption budget
+# Specifies the minimum number of pods that must be available at any given time during the disruption.
+# Ref: https://kubernetes.io/docs/concepts/workloads/pods/disruptions/
+podDisruptionBudget:
+  enabled: true
+  minAvailable: 50%
+
 # Labels to be added to the pod
 podLabels: {}
 
@@ -176,6 +183,9 @@ podSecurityContext: {}
 # Assign a PriorityClassName to pods if set
 priorityClassName: ""
 
+# Number of pod replicas to create for the deployment
+replicaCount: 2
+
 # Recomended initial values for resources
 # adjust them as necessary
 resources:

v2/config/manager/kustomization.yaml

@@ -3,6 +3,7 @@ namePrefix: azureserviceoperator-
 resources:
 - manager.yaml
 - manager_metrics_service.yaml
+- manager_pod_disruption_budget.yaml
 
 patchesStrategicMerge:
   - manager_image_patch.yaml

v2/config/manager/manager.yaml

@@ -24,7 +24,7 @@ spec:
   selector:
     matchLabels:
       control-plane: controller-manager
-  replicas: 1
+  replicas: 2
   revisionHistoryLimit: 10
   template:
     metadata:

v2/config/manager/manager_pod_disruption_budget.yaml

@@ -0,0 +1,12 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: controller-manager
+  namespace: system
+  labels:
+    control-plane: controller-manager
+spec:
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+  minAvailable: 50%