deployment.yaml

# sample yaml to create a deployment in kubernetes

apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: frontend
  labels:
    app: guestbook
spec:
  selector:
    matchLabels:
      app: guestbook
      tier: frontend
  replicas: 3
  template:
    metadata:
      labels:
        app: guestbook
        tier: frontend
    spec:
      containers:
        - name: php-redis
          image: gcr.io/google-samples/gb-frontend:v4
          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: 80