frontend.deployment.yml

apiVersion: apps/v1
# The "kind" is used to determine what this file is describing.
kind: Deployment
metadata:
  # NOTE: https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#what-things-get-dns-names
  name: frontend
spec:
  selector:
    matchLabels:
      app: frontend
  # This is a number of replicas of pods for this deployment.
  # Note: This defaults to 1; I am leaving it here just as an example.
  replicas: 1
  template:
    metadata:
      labels:
        # This label will be selected by the frontend service
        # and thus route requests to the container specified here.
        app: frontend
    spec:
      containers:
      - name: frontend # Used for generating the DNS name.
        image: localhost:5000/frontend
        resources:
          # Setting just the limits also set the requests to the same values.
          limits:
            memory: "128Mi"
            cpu: "500m"
        env:
            - name: PORT
              value: "80"
            - name: DATE_API
              value: dateapplication # Service name of the date application
        ports:
        - containerPort: 80 # A port binding to the container.