Added Couchbase PetSet example

cluster-petset/Dockerfile

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+FROM couchbase
+
+COPY configure-node.sh /opt/couchbase
+
+CMD ["/opt/couchbase/configure-node.sh"]
+

cluster-petset/configure-node.sh

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+set -m
+
+/entrypoint.sh couchbase-server &
+
+sleep 15
+
+# Setup index and memory quota
+curl -v -X POST http://127.0.0.1:8091/pools/default -d memoryQuota=300 -d indexMemoryQuota=300
+
+# Setup services
+curl -v http://127.0.0.1:8091/node/controller/setupServices -d services=kv%2Cn1ql%2Cindex
+
+# Setup credentials
+curl -v http://127.0.0.1:8091/settings/web -d port=8091 -d username=Administrator -d password=password
+
+# Setup Memory Optimized Indexes
+curl -i -u Administrator:password -X POST http://127.0.0.1:8091/settings/indexes -d 'storageMode=memory_optimized'
+
+# Load travel-sample bucket
+curl -v -u Administrator:password -X POST http://127.0.0.1:8091/sampleBuckets/install -d '["travel-sample"]'
+
+if [[ "$HOSTNAME" == *-0 ]]; then
+  TYPE="MASTER"
+else
+  TYPE="WORKER"
+fi
+
+echo "Type: $TYPE"
+
+if [ "$TYPE" = "WORKER" ]; then
+  sleep 15
+
+  IP=`hostname -I`
+
+  echo "Auto Rebalance: $AUTO_REBALANCE"
+  if [ "$AUTO_REBALANCE" = "true" ]; then
+    couchbase-cli rebalance --cluster=$COUCHBASE_MASTER:8091 --user=Administrator --password=password --server-add=$IP --server-add-username=Administrator --server-add-password=password
+  else
+    couchbase-cli server-add --cluster=$COUCHBASE_MASTER:8091 --user=Administrator --password=password --server-add=$IP --server-add-username=Administrator --server-add-password=password
+  fi;
+fi;
+
+fg 1
+

cluster-petset/couchbase-petset.yml

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+apiVersion: apps/v1alpha1
+kind: PetSet
+metadata:
+  name: couchbase
+spec:
+  serviceName: "couchbase"
+  replicas: 2
+  template:
+    metadata:
+      labels:
+        app: couchbase
+      annotations:
+        pod.alpha.kubernetes.io/initialized: "true"
+    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.alpha.kubernetes.io/storage-class: anything
+    spec:
+      accessModes: [ "ReadWriteOnce" ]
+      resources:
+        requests:
+          storage: 1Gi

cluster-petset/couchbase-service.yml

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+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

cluster-petset/readme.adoc

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+= Couchbase Cluster on Kubernetes
+
+The files in this directory can serve as an example of how to deploy a Couchbase Server cluster on Kubernetes. Tested on GKE, Amazon as well as a self-deployed Kubernetes cluster.
+
+== Usage
+
+It should be noted at the beginning that this setup depends on KubeDNS to be enabled and functional to successfully deploy.
+
+. Create the Service
++
+```
+kubectl apply -f couchbase-service.yml
+```
++
+This file will provision a LoadBalancer for the Web Console of the master node as well.
++
+
+. Create the PetSet
++
+```
+kubectl apply -f couchbase-petset.yml
+```
++
++
+. Once the master is up and LB has been provisioned, connect to the WebUI by going to `$LOADBALANCER_IP:8091` in your browser
+. Create either auto-rebalancing nodes or just attach the nodes to the cluster with one of the two worker files:
+
+. Scale workers with the normal scaling commands for the PetSet
++
+```
+kubectl patch petset couchbase -p '{"spec":{"replicas":2}}'
+```
+
+=== Build your own image
+
+. Create the image with `docker build -t $DESIRED_IMG_NAME .`
+. Update all `.yml` files with your new image name if necessary.