frontend: add liveness/readiness probes

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

kubernetes-manifests/frontend.yaml

@@ -13,6 +13,16 @@ spec:
           image: frontend
           ports:
           - containerPort: 8080
+          readinessProbe:
+            initialDelaySeconds: 10
+            httpGet:
+              path: "/"
+              port: 8080
+          livenessProbe:
+            initialDelaySeconds: 10
+            httpGet:
+              path: "/"
+              port: 8080
           env:
           - name: PRODUCT_CATALOG_SERVICE_ADDR
             value: "productcatalogservice:3550"

src/frontend/main.go

@@ -101,7 +101,7 @@ func main() {
 	r.HandleFunc("/cart/checkout", ensureSessionID(svc.placeOrderHandler)).Methods(http.MethodPost)
 	r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir("./static/"))))
 	log.Printf("starting server on :" + srvPort)
-	log.Fatal(http.ListenAndServe("localhost:"+srvPort, r))
+	log.Fatal(http.ListenAndServe(":"+srvPort, r))
 }
 
 func mustMapEnv(target *string, envKey string) {