add /health endpoint (#74)

deploy/dashboard.yaml

@@ -159,13 +159,13 @@ spec:
         - containerPort: 8080
         livenessProbe:
           httpGet:
-            path: /
+            path: /health
             port: 8080
           initialDelaySeconds: 5
           periodSeconds: 5
         readinessProbe:
           httpGet:
-            path: /
+            path: /health
             port: 8080
           initialDelaySeconds: 15
           periodSeconds: 20

deploy/helm/fairwinds/templates/dashboard.deployment.yaml

@@ -36,13 +36,13 @@ spec:
         - containerPort: 8080
         livenessProbe:
           httpGet:
-            path: /
+            path: /health
             port: 8080
           initialDelaySeconds: 5
           periodSeconds: 5
         readinessProbe:
           httpGet:
-            path: /
+            path: /health
             port: 8080
           initialDelaySeconds: 15
           periodSeconds: 20

main.go

@@ -84,6 +84,9 @@ func main() {
 }
 
 func startDashboardServer(c conf.Configuration, k *kube.ResourceProvider, port int) {
+	http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("OK"))
+	})
 	http.HandleFunc("/results.json", func(w http.ResponseWriter, r *http.Request) {
 		dashboard.EndpointHandler(w, r, c, k)
 	})