This directory contains the source code and Kubernetes manifests for PHP Guestbook application.

Follow the tutorial at https://kubernetes.io/docs/tutorials/stateless-application/guestbook/.

• Start up a Redis master.
• Start up Redis slaves.
• Start up the guestbook frontend.
• Expose and view the Frontend Service.
• Clean up

You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. If you do not already have a cluster, you can create one by using Minikube, or you can use one of these Kubernetes playgrounds:

• Katacoda
• Play with Kubernetes

Apply the Redis Master Deployment from the redis-master-deployment.yaml file:

  kubectl apply -f https://raw.githubusercontent.com/dviv/kubernetes-tasks/master/guestbook/redis-master-deployment.yaml

Apply the Redis Master Deployment from the redis-master-service.yaml file:

  kubectl apply -f https://raw.githubusercontent.com/dviv/kubernetes-tasks/master/guestbook/redis-master-service.yaml

Creating the Redis Slave Deployment Deployments scale based off of the configurations set in the manifest file. In this case, the Deployment object specifies two replicas. Apply the Redis Slave Deployment from the redis-slave-deployment.yaml file:

  kubectl apply -f https://raw.githubusercontent.com/dviv/kubernetes-tasks/master/guestbook/redis-slave-deployment.yaml

Apply the Redis Slave Service from the following redis-slave-service.yaml file:

  kubectl apply -f https://raw.githubusercontent.com/dviv/kubernetes-tasks/master/guestbook/redis-slave-service.yaml

The guestbook application has a web frontend serving the HTTP requests written in PHP. It is configured to connect to the redis-master Service for write requests and the redis-slave service for Read requests

Apply the frontend Deployment from the frontend-deployment.yaml file:

  kubectl apply -f https://raw.githubusercontent.com/dviv/kubernetes-tasks/master/guestbook/frontend-deployment.yaml

Query the list of Pods to verify that the three frontend replicas are running:

  kubectl get pods -l app=guestbook -l tier=frontend

The response should be similar to this:

  NAME                        READY     STATUS    RESTARTS   AGE
  frontend-3823415956-dsvc5   1/1       Running   0          54s
  frontend-3823415956-k22zn   1/1       Running   0          54s
  frontend-3823415956-w9gbt   1/1       Running   0          54s

Apply the frontend Service from the frontend-service.yaml file:

  kubectl apply -f https://raw.githubusercontent.com/dviv/kubernetes-tasks/master/guestbook/frontend-service.yaml

Query the list of Services to verify that the frontend Service is running:

  kubectl get services 

The response should be similar to this:

  NAME           TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)        AGE
  frontend       ClusterIP   10.0.0.112   <none>       80:31323/TCP   6s
  kubernetes     ClusterIP   10.0.0.1     <none>        443/TCP        4m
  redis-master   ClusterIP   10.0.0.151   <none>        6379/TCP       2m
  redis-slave    ClusterIP   10.0.0.223   <none>        6379/TCP       1m

Run the following commands to delete all Pods, Deployments, and Services.

  kubectl delete deployment -l app=redis
  kubectl delete service -l app=redis
  kubectl delete deployment -l app=guestbook
  kubectl delete service -l app=guestbook

Query the list of Pods to verify that no Pods are running:

  kubectl get pods

The response should be this:

  No resources found.