Merge pull request #1489 from sonbui00/fix-1104

Update Istio Gateway reference format

docs/gitbook/tutorials/canary-helm-gitops.md

@@ -50,7 +50,7 @@ helm upgrade -i frontend flagger/podinfo \
 --set backend=http://backend.test:9898/echo \
 --set canary.enabled=true \
 --set canary.istioIngress.enabled=true \
---set canary.istioIngress.gateway=public-gateway.istio-system.svc.cluster.local \
+--set canary.istioIngress.gateway=istio-system/public-gateway \
 --set canary.istioIngress.host=frontend.istio.example.com
 ```
 
@@ -278,7 +278,7 @@ spec:
         enabled: true
         istioIngress:
           enabled: true
-          gateway: public-gateway.istio-system.svc.cluster.local
+          gateway: istio-system/public-gateway
           host: frontend.istio.example.com
         loadtest:
           enabled: true

docs/gitbook/tutorials/istio-ab-testing.md

@@ -92,7 +92,7 @@ spec:
     port: 9898
     # Istio gateways (optional)
     gateways:
-    - public-gateway.istio-system.svc.cluster.local
+    - istio-system/public-gateway
     # Istio virtual service host names (optional)
     hosts:
     - app.example.com

docs/gitbook/tutorials/istio-progressive-delivery.md

@@ -95,7 +95,7 @@ spec:
     targetPort: 9898
     # Istio gateways (optional)
     gateways:
-    - public-gateway.istio-system.svc.cluster.local
+    - istio-system/public-gateway
     # Istio virtual service host names (optional)
     hosts:
     - app.example.com
@@ -326,7 +326,7 @@ spec:
     targetPort: 9898
     # Istio gateways (optional)
     gateways:
-    - public-gateway.istio-system.svc.cluster.local
+    - istio-system/public-gateway
     # Istio virtual service host names (optional)
     hosts:
     - app.example.com

docs/gitbook/tutorials/zero-downtime-deployments.md

@@ -172,7 +172,7 @@ spec:
   service:
     port: 9898
     gateways:
-    - public-gateway.istio-system.svc.cluster.local
+    - istio-system/public-gateway
     hosts:
     - app.example.com
     retries: