Accessing the Frontend and Scaling the Deployment

``` NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE frontend ClusterIP 10.97.28.230 <none> 80/TCP 19s kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 3d19h redis-follower ClusterIP 10.110.162.42 <none> 6379/TCP 5m48s redis-leader ClusterIP 10.103.78.24 <none> 6379/TCP 11m ``` ### Viewing the Frontend Service via `kubectl port-forward` 1. Run the following command to forward port `8080` on your local machine to port `80` on the service. ```shell kubectl port-forward svc/frontend 8080:80 ``` The response should be similar to this: ``` Forwarding from 127.0.0.1:8080 -> 80 Forwarding from [::1]:8080 -> 80 ``` 1. load the page [http://localhost:8080](http://localhost:8080) in your browser to view your guestbook. ### Viewing the Frontend Service via `LoadBalancer` If you deployed the `frontend-service.yaml` manifest with type: `LoadBalancer` you need to find the IP address to view your Guestbook. 1. Run the following command to get the IP address for the frontend Service. ```shell kubectl get service frontend ``` The response should be similar to this: ``` NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE frontend LoadBalancer 10.51.242.136 109.197.92.229 80:32372/TCP 1m ``` 1. Copy the external IP address, and load the page in your browser to view your guestbook. {{< note >}} Try adding some guestbook entries by typing in a message, and clicking Submit. The message you typed appears in the frontend. This message indicates that data is successfully added to Redis through the Services you created earlier. {{< /note >}} ## Scale the Web Frontend You can scale up or down as needed because your servers are defined as a Service that uses a Deployment controller. 1. Run the following command to scale up the number of frontend Pods: ```shell kubectl scale deployment frontend --replicas=5 ``` 1. Query the list of Pods to verify the number of frontend Pods running: ```shell kubectl get pods ``` The response should look similar to this: ``` NAME READY STATUS RESTARTS AGE frontend-85595f5bf9-5df5m 1/1 Running 0 83s frontend-85595f5bf9-7zmg5 1/1 Running 0 83s frontend-85595f5bf9-cpskg 1/1 Running 0 15m

This section explains how to access the deployed Guestbook frontend via `kubectl port-forward` or a `LoadBalancer`. It also guides the user on scaling the web frontend by increasing the number of frontend pods using the `kubectl scale` command and verifying the updated number of running pods.