Basic Kubernetes Examples (YAML Edition)

deployment.yaml

# Notice how this has the same variables over
# and over again... One of the reasons why YAML is not the tool
# for the job (in hindsight).

apiVersion: apps/v1
kind: Deployment
metadata:
  name: echo
  labels:
    app: echo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: echo
  template:
    metadata:
      labels:
        app: echo
    spec:
      containers:
      - name: echo
        image: k8s.gcr.io/echoserver:1.4
        ports:
        - containerPort: 8080
        resources:
          requests:
            memory: "100Mi"
            cpu: "0.5"
          limits:
            memory: "128Mi"
            cpu: "0.65"

ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: echo
spec:
  rules:
  - host: "echo.example.com"
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: echo
            port:
              number: 8080

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: echo
spec:
  selector:
    app: echo
  ports:
    - protocol: TCP
      port: 8080
      targetPort: 8080