chart: add Istio virtual service into loadtester chart (#647)

Add Istio virtual service to loadtester chart

charts/loadtester/README.md

@@ -62,6 +62,11 @@ Parameter | Description | Default
 `logLevel` | Log level can be debug, info, warning, error or panic | `info`
 `appmesh.enabled` | Create AWS App Mesh v1beta2 virtual node | `false`
 `appmesh.backends` | AWS App Mesh virtual services | `none`
+`istio.enabled` | Create Istio virtual service | `false`
+`istio.host` | Loadtester hostname  | `flagger-loadtester.flagger`
+`istio.gateway.enabled` | Create Istio gateway in namespace | `false`
+`istio.tls.enabled` | Enable TLS in gateway ( TLS secrets should be in namespace ) | `false`
+`istio.tls.httpsRedirect` | Redirect traffic to TLS port | `false`
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm upgrade`. For example,
 

charts/loadtester/templates/istio-gw.yaml

@@ -0,0 +1,30 @@
+{{- if and (.Values.istio.enabled) (.Values.istio.gateway.enabled) }}
+apiVersion: networking.istio.io/v1alpha3
+kind: Gateway
+metadata:
+  name: {{ include "loadtester.fullname" . }}
+spec:
+  selector:
+    istio: ingressgateway
+  servers:
+    - port:
+        number: 80
+        name: http-default
+        protocol: HTTP
+      hosts:
+       - {{ .Values.istio.host }}
+    {{- if .Values.istio.tls.enabled }}
+    - port:
+        number: 443
+        name: https-default
+        protocol: HTTPS
+      tls:
+        httpsRedirect: {{ .Values.istio.tls.httpsRedirect }}
+        mode: SIMPLE
+        serverCertificate: "sds"
+        privateKey: "sds"
+        credentialName: {{ include "loadtester.fullname" . }}
+      hosts:
+      - {{ .Values.istio.host }}
+    {{- end }}
+{{- end }}

charts/loadtester/templates/istio-vs.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.istio.enabled }}
+apiVersion: networking.istio.io/v1alpha3
+kind: VirtualService
+metadata:
+  name: {{ include "loadtester.fullname" . }}
+spec:
+  gateways:
+  - {{ include "loadtester.fullname" . }}
+  hosts:
+  - {{ .Values.istio.host }}
+  http:
+  - route:
+    - destination:
+        host: {{ include "loadtester.fullname" . }}
+        port:
+          number: {{ .Values.service.port }}
+{{- end }}

charts/loadtester/values.yaml

@@ -59,3 +59,13 @@ appmesh:
   backends:
   - podinfo
   - podinfo-canary
+
+#Istio virtual service and gatway settings. TLS secrets should be in namespace before enbaled it. ( secret format loadtester.fullname ) 
+istio:
+  enabled: false
+  host: flagger-loadtester.flagger
+  gateway:
+    enabled: false  
+  tls:
+    enabled: false
+    httpsRedirect: false