couchbase-sc.yaml

Couchbase

#Create storage class for couchbase volumes.
kubectl create -f couchbase-sc.yaml
 
#Create couchbase service.
kubectl create -f couchbase-service.yaml
 
#Check the status of Couchbase app
kubectl get services
 
#The UI and backend services are created but nothing is accessible from master UI yet as we have just created the dns resolver.
#The Couchbase app (UI + noSQL db) is yet to be created.
# http://10.152.191.162:30197/ <port might change each time the service is deployed>
 
#Deploy the application
kubectl create -f couchbase-statefulset.yaml
 
# Check NGC to see steps VCP is taking behind the scenes to provision persistent storage based on the business
# requirements
https://10.152.191.28/vsphere-client/
 
#Show that application is deployed in two pods as they are two replicas
kubectl get pods
 
#Since your application has a lot of load, deploy one more instance of the app.
kubectl scale statefulset couchbase --replicas=3
 
#Check whether the application has scaled successfully.
kubectl get pods

couchbase-sc.yaml

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: couchbasesc
provisioner: kubernetes.io/vsphere-volume
parameters:
    diskformat: thin

couchbase-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: couchbase
  labels:
    app: couchbase
spec:
  ports:
  - port: 8091
    name: couchbase
  # *.couchbase.default.svc.cluster.local
  clusterIP: None
  selector:
    app: couchbase
---
apiVersion: v1
kind: Service
metadata:
  name: couchbase-ui
  labels:
    app: couchbase-ui
spec:
  ports:
  - port: 8091
    name: couchbase
  selector:
    app: couchbase
  sessionAffinity: ClientIP
  type: LoadBalancer

couchbase-statefulset.yaml

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: couchbase
spec:
  serviceName: "couchbase"
  replicas: 2
  template:
    metadata:
      labels:
        app: couchbase
    spec:
      terminationGracePeriodSeconds: 0
      containers:
      - name: couchbase
        image: saturnism/couchbase:k8s-petset
        ports:
        - containerPort: 8091
        volumeMounts:
        - name: couchbase-data
          mountPath: /opt/couchbase/var
        env:
          - name: COUCHBASE_MASTER
            value: "couchbase-0.couchbase.default.svc.cluster.local"
          - name: AUTO_REBALANCE
            value: "false"
  volumeClaimTemplates:
  - metadata:
      name: couchbase-data
      annotations:
        volume.beta.kubernetes.io/storage-class: couchbasesc
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 1Gi