feat: add Istio Service Mesh Gateway & Virtual Service

templates/deployment.yaml

@@ -37,9 +37,8 @@ spec:
         - name: {{ .Chart.Name }}
           image: "{{ .Values.image.repository }}/{{ .Values.image.name }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
-          #     cpu: "1000m"x
           resources:
-            requests: 
+            requests:
               memory: {{ .Values.resources.requests.memory}}
               cpu: {{ .Values.resources.requests.cpu}}
             limits:

templates/istio_gateway.yaml

@@ -0,0 +1,15 @@
+apiVersion: networking.istio.io/v1alpha3
+kind: Gateway
+metadata:
+  name: {{ .Release.Name }}-gateway
+  namespace: {{ .Values.istio.namespace }}
+spec:
+  selector:
+    istio: ingress
+  servers:
+  - port:
+      number: {{ .Values.istio.gateway.port }} # the Gateway port to be exposed
+      name: http
+      protocol: HTTP
+    hosts:
+    - "*"  # accepting requests from all the hosts

templates/istio_virtual_service.yaml

@@ -0,0 +1,33 @@
+apiVersion: networking.istio.io/v1alpha3
+kind: VirtualService
+metadata:
+  name: {{ .Release.Name }}-vs
+  namespace: {{ .Values.istio.namespace }}
+spec:
+  hosts:
+  - "*"
+  gateways:
+  - {{ .Release.Name }}-gateway
+  http:
+  - match:
+    - port: {{ .Values.istio.gateway.port }}  # to match the gateway port basically to bind this to gateway
+    route:
+    - destination:
+        host: {{ .Release.Name }}-service.{{ .Values.namespace }}.svc.cluster.local # to match the service where we need to send the req (here we need to pass the Fully qualified domain name because our service is in different ns as from VS AND GATEWAY)
+        port:
+          number: {{.Values.service.port}} # the service port of the webapp
+  # - route:
+  #   - destination:
+  #       host: infra-helm-release-kafka-broker-0.infra-helm-release-kafka-broker-headless.deps.svc.cluster.local
+  #       port:
+  #         number: 9094
+  # - route:
+  #   - destination:
+  #       host: infra-helm-release-kafka-broker-0.infra-helm-release-kafka-broker-headless.deps.svc.cluster.local
+  #       port:
+  #         number: 9094
+  # - route:
+  #   - destination:
+  #       host: infra-helm-release-kafka-broker-0.infra-helm-release-kafka-broker-headless.deps.svc.cluster.local
+  #       port:
+  #         number: 9094

values.yaml

@@ -22,6 +22,11 @@ imagePullSecrets:
 
 namespace: webapp
 
+istio:
+  gateway:
+    port: 80
+  namespace: istio-system
+
 hpa:
   metrics:
     averageUtilization: 20
@@ -114,5 +119,5 @@ resources:
     memory: "512Mi"
     cpu: "0.6"
   requests:
-    memory: "128Mi"
-    cpu: "0.2"
+    memory: "512Mi"
+    cpu: "0.6"