chore: add k8s ingress router(traefik) and health check

health check help us if pod not ready, dont add into load balance list

docker/simple/k8s/README.md

@@ -6,7 +6,13 @@ Its doc will tell you how to deploy `Tailchat` in kubeneters.
 kubectl apply -f namespace.yml -f pv.yml -f mongo.yml -f minio.yml -f redis.yml -f tailchat.yml
 ```
 
-if you wanna delete all resource, just replace `apply` to `delete`.
+### Delete
+
+if you wanna delete all resource, just delete namespace.
+
+```bash
+kubectl delete -f namespace.yml
+```
 
 ## Setup one by one
 
@@ -63,3 +69,44 @@ kubectl run -it --rm test-pod --image=busybox --restart=Never
 ```
 wget -q -O - http://<tailchat-cluster-ip>:11000/health
 ```
+
+## Router and Load Balance
+
+For example, we use traefik.
+
+### Install Traefik provider
+
+```bash
+helm repo add traefik https://helm.traefik.io/traefik
+helm install traefik traefik/traefik -n tailchat
+```
+
+### Apply Ingress Config
+
+```bash
+kubectl apply -f ingress.yml
+```
+
+### Check Status
+
+```bash
+kubectl get services -n tailchat
+```
+
+If every is ok, its should be like this:
+
+![](./images/traefik-svc.png)
+
+### Set DNS record
+
+```bash
+sudo vim /etc/hosts
+```
+
+append this record:
+
+```
+127.0.0.1 tailchat.internal.com
+```
+
+Now you can open browser and view `http://tailchat.internal.com` to open tailchat in k8s.

docker/simple/k8s/ingress.yml

@@ -0,0 +1,19 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: ingress
+  namespace: tailchat
+  annotations:
+    traefik.ingress.kubernetes.io/routing-type: edge
+spec:
+  rules:
+  - host: tailchat.internal.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: tailchat-service
+            port:
+              number: 11000

docker/simple/k8s/tailchat.yml

@@ -37,6 +37,22 @@ spec:
               value: com.msgbyte.tailchat
           ports:
             - containerPort: 11000
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: 11000
+            initialDelaySeconds: 30
+            periodSeconds: 30
+            timeoutSeconds: 2
+            failureThreshold: 3
+          readinessProbe:
+            httpGet:
+              path: /health
+              port: 11000
+            initialDelaySeconds: 10
+            periodSeconds: 30
+            timeoutSeconds: 2
+            failureThreshold: 3
           resources:
             requests:
               cpu: 50m