Merge pull request #54 from ollymaunder-dnv/enable-mirroring

Enable mirroring

Author: mjwloch

charts/platform-service/Chart.yaml

@@ -2,4 +2,4 @@ apiVersion: v1
 appVersion: "1.1"
 description: Platform service chart
 name: platform-service
-version: 1.5.0
+version: 1.5.3

charts/platform-service/templates/_helpers.tpl

@@ -164,5 +164,12 @@ http:
     {{- fail "Either replaceWith or regexRewrite are required" }}
   {{- end }}
 {{- end }}
-
+{{- if $.Values.defaultRouting.mirror.enabled }}
+    mirror:
+      host: {{required "host is required" $.Values.defaultRouting.mirror.host }}
+  {{- if $.Values.defaultRouting.mirror.mirrorPercentage }}
+    mirrorPercentage: 
+      value: {{ $.Values.defaultRouting.mirror.mirrorPercentage }}
+  {{- end }}
+{{- end }}
 {{- end -}}

charts/platform-service/values.yaml

@@ -138,6 +138,15 @@ defaultRouting:
     #   match: '^\/service\/([^\/]+)(\/.*)$'
     #   rewrite: '\/customprefix\/\2\/\1'
 
+  mirror:
+    # enable request mirroring to a secondary service. See https://istio.io/latest/docs/tasks/traffic-management/mirroring/
+    enabled: false
+    # name of the mirrored service (must be in the same namespace)
+    host: my-mirror-service
+    # percentage of traffic to mirror (0-100). Defaults to 100 if not specified
+    # mirrorPercentage: 100
+    
+
   # Load balancer policy
   # Also supported are:
   #   STICKY_SESSIONS: ensures each session will always hit the same pod.