chart: increment version to 0.2.1 and add conditional for synchronous replication

Author: mdluo

charts/cnpg-cluster/Chart.yaml

@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.2.0
+version: 0.2.1
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/cnpg-cluster/templates/cnpg-cluster.yaml

@@ -48,11 +48,13 @@ spec:
       max_parallel_workers_per_gather: "2"
       max_parallel_workers: "4"
 
+    {{ if (gt (.Values.instances | int) 1) }}
     # Synchronous replication for data durability
     synchronous:
       dataDurability: required
       method: any
       number: 1
+    {{- end }}
 
   storage:
     storageClass: {{ .Values.storageClass }}