Add simple anonymous usage metrics (#1167)

This change reports total function call count to an analytics url once a day.

It's done behind the existing analytics flag.

charts/fission-all/templates/deployment.yaml

@@ -209,6 +209,13 @@ spec:
             value: {{ .Values.debugEnv | quote }}
           - name: TRACING_SAMPLING_RATE
             value: {{ .Values.traceSamplingRate | default "0.5" | quote }}
+{{ if .Values.analytics }}
+          - name: ANALYTICS_URL
+            value: "https://g.fission.sh/metrics"
+{{ else if .Values.analyticsNonHelmInstall }}
+          - name: ANALYTICS_URL
+            value: "https://g.fission.sh/metrics"
+{{ end }}
         readinessProbe:
           httpGet:
             path: "/router-healthz"

charts/fission-core/templates/deployment.yaml

@@ -211,6 +211,13 @@ spec:
             value: {{ .Values.routerRoundTripSvcAddressUpdateTimeout | default 30 | quote }}
           - name: DEBUG_ENV
             value: {{ .Values.debugEnv | quote }}
+{{ if .Values.analytics }}
+          - name: ANALYTICS_URL
+            value: "https://g.fission.sh/metrics"
+{{ else if .Values.analyticsNonHelmInstall }}
+          - name: ANALYTICS_URL
+            value: "https://g.fission.sh/metrics"
+{{ end }}
         readinessProbe:
           httpGet:
             path: "/router-healthz"