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# create...
# $ kubectl apply -f ./nginx.yaml
#
# delete...
# $ kubectl delete -f ./nginx.yaml
#
# monitor...
# $ watch kubectl -n nginx-test get pod,svc,endpoints,ingress,deployments,replicasets
#
# troubleshoot service...
# $ kubectl proxy --port=8001
# $ curl http://127.0.0.1:8001/api/v1/namespaces/nginx-test/services/nginx-svc:http/proxy/nginx-test
#
# troubleshooting ingress...
# $ export IP=
# $ export URI=nginx-test
# $ curl -Ik http://$IP/$URI
---
apiVersion: v1
kind: Namespace
metadata:
  name: nginx-test
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-dp
  namespace: nginx-test
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        # nginx | nginxdemos/hello
        image: nginxdemos/hello
        ports:
        - containerPort: 80
          protocol: TCP
          name: http
        resources:
          limits:
            cpu: 100m
            memory: 128Mi
      restartPolicy: Always
      terminationGracePeriodSeconds: 30
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-svc
  namespace: nginx-test
spec:
  # ClusterIP (http/https) | NodePort | LoadBalancer (tcp/udp) | ExternalName
  type: ClusterIP
  selector:
    app: nginx
  ports:
  - targetPort: 80
    port: 80  
    protocol: TCP
    name: http
  # when service.spec.type == LoadBalancer
  #loadBalancerSourceRanges:
  #  - 8.8.8.8/32
---
# when service.spec.type == ClusterIP
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: nginx-ingress
  namespace: nginx-test
  #annotations:
  #  kubernetes.io/ingress.class: "addon-http-application-routing"
spec:
  rules:
  - http:
      paths:
      - backend:
          servicePort: 80
          serviceName: nginx-svc
        path: /nginx-test