Make deployment updateStrategy variable.

There are scenarios where the pod can get scraped twice by the ServiceMonitor.
This will leave duplicate series in prometheus that may lead to many-to-many queries causing broken grafana dashboards.

With this change updateStrategy can be changed to Recreate for those
cases.

charts/opencost/Chart.yaml

@@ -9,7 +9,7 @@ keywords:
   - kubecost
   - opencost
   - monitoring
-version: 1.20.3
+version: 1.21.0
 maintainers:
   - name: mattray
     url: https://mattray.dev

charts/opencost/templates/deployment.yaml

@@ -11,11 +11,7 @@ spec:
   replicas: {{ .Values.opencost.exporter.replicas }}
   selector:
     matchLabels: {{- include "opencost.selectorLabels" . | nindent 6 }}
-  strategy:
-    rollingUpdate:
-      maxSurge: 1
-      maxUnavailable: 1
-    type: RollingUpdate
+  strategy: {{ toYaml .Values.updateStrategy | nindent 4 }}
   template:
     metadata:
       labels:

charts/opencost/values.yaml

@@ -18,6 +18,12 @@ serviceAccount:
   # -- Whether pods running as this service account should have an API token automatically mounted
   automountServiceAccountToken: true
 
+# --  Strategy to be used for the Deployment
+updateStrategy:
+  rollingUpdate:
+    maxSurge: 1
+    maxUnavailable: 1
+  type: RollingUpdate
 # --  Annotations to add to the all the resources
 annotations: {}
 # --  Annotations to add to the OpenCost Pod