Deploy,PV,PVC,Service

DI_Lunch

# minikube, apply vs create
# deploy ghost publishing platform
# maintain data at container startsand restarts mounts volume
# auto scale up cpu

apiVersion: extensions/v1beta1
kind: Deployment # rolls out replicaset
metadata:
  name: ghost
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ghost #this is how the deployment finds pods to manage
  template:
    metadata:
      labels:
        app: ghost # this namesthe pod
    spec: #template spec section
      containers: # the pod container, the container spec is in the deployment
      - name: ghost
        image: ghost
        ports:
        - containerPort: 2368
        volumeMounts:
        - mountPath: /var/lib/ghost/content
          name: ghost-volumes
      volumes:
        - name: ghost-volumes
          persistentVolumeClaim:
            claimName: ghost-volume-claim
---

apiVersion: v1
kind: PersistentVolume # storage class, NSF, ceph, aws
metadata:
  name: ghost-volumes
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce #ReadWriteOnce, ReadWriteMany, ReadOnlyMany (read only by many nodes)
  hostPath:
    path: /var/lib/ghost/content

---

apiVersion: v1
kind: PersistentVolumeClaim # the request for PV, specify storage size and accessModes, binds to PV
metadata:
  name: ghost-volume-claim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi

---

apiVersion: v1
kind: Service #expose pods over network, pods have own IPaddress
metadata:
  name: ghost-service
  labels:
    app: ghost
spec:
  selector:
    app: ghost
    tier: frontend
  ports:
    - protocol: TCP      
      port: 80
  type: NodePort #ClusterIP within cluster, NodePort static port on Node, LoadBalancer, clouds LB