Docker/nginx-master.yml at master · Surajwaghmare35/Docker · GitHub

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apiVersion: v1
kind: Service
metadata:
  name: nginx
  # above is any name u can define to service
  labels:
    group: webserver

spec:
  selector:
    app: web-server
    # above we specify key-valuse pair of pods
    # which is a part of deployment & its ctrl. by service obj.
  ports:
    - protocol: "TCP"
      port: 8080
      # local port to access
      targetPort: 80
      # container port
  type: LoadBalancer
  #  Exposes the Service externally using a cloud provider's load balancer

  # type: ClusterIP

  # Exposes the Service on a cluster-internal IP.
  # Choosing this value makes the Service only reachable from within the cluster.
  # This is the default that is used if you don't explicitly specify a type for a Service.

  # type: NodePort

  # Exposes the Service on each Node's IP at a static port (the NodePort).
  # To make the node port available, Kubernetes sets up a cluster IP address,
  # the same as if you had requested a Service of type: ClusterIP.

---
apiVersion: apps/v1
# above we specify k8s api-version
kind: Deployment
# above we define k8s obj.
metadata:
  name: nginx
  # we define name of k8s deployment obj.
  labels:
    group: webserver
    # to group all obj. in one we define lables
    # which helps to delete all ojb of 1-group
    # as:(kubectl delete  deployments,services -l group=webserver)

# now we defining spec of deployment obj.
spec:
  replicas: 1
  selector:
    matchExpressions:
      - { key: app, operator: In, values: [web-server] }

    # matchLabels:
    #   app: web-server
    # here we specify which pods is contl. this deployment
    # by using pods key=value pair.

  # now we defining pods specific details of deployment obj.
  template:
    metadata:
      labels:
        app: web-server
        # above we define pods key=value pair which will used by deployment

    # now we set pods spec. conf. of deployment obj.
    spec:
      containers:
        - name: nginx
          image: nginx
          imagePullPolicy: Always
          # it will pull always latest img.

          env:
            - name: CONTAINER_DIR
              # value: "/usr/share/nginx/html"
              valueFrom:
                configMapKeyRef:
                  name: nginx-data-path
                  key: nginx_data_dir

          # livenessProbe:
          #   httpGet:
          #     scheme: HTTP
          #     path: "/usr/share/nginx/html/index.html"
          #     port: 80
          #   initialDelaySeconds: 10
          #   periodSeconds: 3

          volumeMounts:
            - mountPath: /tmp
              # container path
              name: host-pv
      volumes:
        - name: host-pv

          # emptyDir: {}
          # #create a new emptyDir per/pod & attach it.

          # hostPath:
          #   path: /data
          #   type: DirectoryOrCreate
          #   # it create a dir on Host m/c & mul.Pod share its data at same path
          #   #  attach to mul.Pod at-a-time

          persistentVolumeClaim:
            claimName: host-pvc