Deploy PHP application with Redis - Kubernetes

Question

I need to deploy a PHP application with Redis. I have the following requirements:

1. Single Redis Instance to store entries
2. Replicated Redis instances for entry reads
3. instances for frontend instances

Can somebody help me with this?

Thanks in advance!

Answer 1

Hi, @Hannah, Follow these steps:

1. Create a Kubernetes cluster: https://www.edureka.co/blog/install-kubernetes-on-ubuntu

2. Set up the Redis master: https://www.edureka.co/community/58783/deployment-controller-single-replica-redis-master-kubernetes

3. Apply the redis master deployment

kubectl apply -f https://k8s.io/examples/application/guestbook/redis-master-deployment.yaml

4. Create Redis master service: https://www.edureka.co/community/58785/application-communication-with-the-redis-master

5. Apply the service:

kubectl apply -f https://k8s.io/examples/application/guestbook/redis-master-service.yaml

6. Create slave deployments, if needed

application/guestbook/redis-slave-deployment.yaml 

apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: redis-slave
  labels:
    app: redis
spec:
  selector:
    matchLabels:
      app: redis
      role: slave
      tier: backend
  replicas: 2
  template:
    metadata:
      labels:
        app: redis
        role: slave
        tier: backend
    spec:
      containers:
      - name: slave
        image: gcr.io/google_samples/gb-redisslave:v3
        resources:
          requests:
            cpu: 100m
            memory: 100Mi
        env:
        - name: GET_HOSTS_FROM
          value: dns
          # Using `GET_HOSTS_FROM=dns` requires your cluster to
          # provide a dns service. As of Kubernetes 1.3, DNS is a built-in
          # service launched automatically. However, if the cluster you are using
          # does not have a built-in DNS service, you can instead
          # access an environment variable to find the master
          # service's host. To do so, comment out the 'value: dns' line above, and
          # uncomment the line below:
          # value: env
        ports:
        - containerPort: 6379

7. Deploy the application frontend

8. View the application through load balancer

kubectl get service frontend