Intermittent NATS issue fix (#889)

* NATS issue fix

* Nats streaming issue fix

* nats issue fix

Author: prakarsh-dt

manifests/yamls/nats-server.yaml

@@ -113,7 +113,7 @@ spec:
 
       app.kubernetes.io/name: nats
       app.kubernetes.io/instance: devtron-nats
-  replicas: 3
+  replicas: 1
   serviceName: devtron-nats
   template:
     metadata:

manifests/yamls/nats-streaming.yaml

@@ -102,14 +102,24 @@ spec:
 
       affinity:
         podAntiAffinity:
-          requiredDuringSchedulingIgnoredDuringExecution:
-          - labelSelector:
-              matchExpressions:
-              - key: app
-                operator: In
-                values:
-                - devtron-stan
-            topologyKey: kubernetes.io/hostname
+#          requiredDuringSchedulingIgnoredDuringExecution:
+#          - labelSelector:
+#              matchExpressions:
+#              - key: app
+#                operator: In
+#                values:
+#                - devtron-stan
+#            topologyKey: kubernetes.io/hostname
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - weight: 100
+              podAffinityTerm:
+                labelSelector:
+                  matchExpressions:
+                    - key: app
+                      operator: In
+                      values:
+                        - devtron-stan
+                topologyKey: kubernetes.io/hostname
       containers:
         ####################
         #  NATS Streaming  #