fix: use variable for pod readiness and liveness probe script

Author: RouxAntoine

controllers/spec/template/yaml/PrimaryStatefulSetTemplate.yaml

@@ -68,7 +68,7 @@ spec:
               command:
                 - sh
                 - -c
-                - exec pg_isready -U postgres -h $POD_IP
+                - exec pg_isready -U $POSTGRES_USER -h $POD_IP
             failureThreshold: 10
             initialDelaySeconds: 60
             periodSeconds: 20
@@ -80,7 +80,7 @@ spec:
               command:
                 - sh
                 - -c
-                - exec pg_isready -U postgres -h $POD_IP
+                - exec pg_isready -U $POSTGRES_USER -h $POD_IP
             failureThreshold: 3
             initialDelaySeconds: 5
             periodSeconds: 10

controllers/spec/template/yaml/ReplicaStatefulSetTemplate.yaml

@@ -90,7 +90,7 @@ spec:
               command:
                 - sh
                 - -c
-                - exec pg_isready -U postgres -h $POD_IP
+                - exec pg_isready -U $POSTGRES_USER -h $POD_IP
             failureThreshold: 10
             initialDelaySeconds: 60
             periodSeconds: 20
@@ -102,7 +102,7 @@ spec:
               command:
                 - sh
                 - -c
-                - exec pg_isready -U postgres -h $POD_IP
+                - exec pg_isready -U $POSTGRES_USER -h $POD_IP
             failureThreshold: 3
             initialDelaySeconds: 5
             periodSeconds: 10