ronin13 / zookeeper-operator Goto Github PK

# Make sure [operator-sdk](https://github.com/operator-framework/operator-sdk) is installed
# Refer to operator-sdk docs for more and dependencies of operator-sdk.

$ mkdir -p $GOPATH/src/github.com/operator-framework
$ cd $GOPATH/src/github.com/operator-framework
$ git clone https://github.com/operator-framework/operator-sdk
$ cd operator-sdk
$ git checkout master
$ make dep
$ make install



$ mkdir -p $GOPATH/src/github.com/ronin13/
$ cd $GOPATH/src/github.com/ronin13/
$ git clone https://github.com/ronin13/zookeeper-operator
$ cd zookeeper-operator

# Make sure kubectl points to a running k8s cluster (or minikube for a start).
$ minikube start

# Build docker build
$ eval $(minikube docker-env)
$ make -C docker-zookeeper build

# Create accounts for RBAC
$ kubectl create -f deploy/service_account.yaml
$ kubectl create -f deploy/role.yaml
$ kubectl create -f deploy/role_binding.yaml

# Deploy zookeeper CRD
$ kubectl create -f deploy/crds/wnohang_v1alpha1_zookeeper_crd.yaml

# Deploy zookeeper custom resource  (default name is zoos with 3 nodes).
$ kubectl create -f deploy/crds/wnohang_v1alpha1_zookeeper_cr.yaml

# Finally deploy the operator.
$ kubectl create -f deploy/operator.yaml

# See if the cluster is running.

$ kubectl get pods -l app=zoos
NAME     READY   STATUS    RESTARTS   AGE
zoos-0   0/1     Running   0          6s
zoos-1   0/1     Running   0          6s
zoos-2   0/1     Running   0          6s


$ kubectl describe zookeeper.wnohang.net/zoos
Name:         zoos
Namespace:    default
Labels:       <none>
Annotations:  <none>
API Version:  wnohang.net/v1alpha1
Kind:         Zookeeper
Metadata:
  Creation Timestamp:  2019-04-01T22:16:41Z
  Generation:          1
  Resource Version:    184847
  Self Link:           /apis/wnohang.net/v1alpha1/namespaces/default/zookeepers/zoos
  UID:                 d39f11f4-54cb-11e9-8160-08002759e00a
Spec:
  Nodes:  3
Events:   <none>


# Verify that it is running.

$ for x in 0 1 2;do kubectl exec zoos-$x -- sh -c  "echo -n $x' ';  echo mntr  | nc localhost 2181 | grep zk_server_state"; done
0 zk_server_state       follower
1 zk_server_state       follower
2 zk_server_state       leader

# Cleanup
$ kubectl delete -R -f deploy/
$ kubectl delete  statefulsets/zoos pvc/zoos-zoos-{0,1,2} 

# Scaling up/down

$ kubectl edit zookeeper.wnohang.net/zoos
# Bump the nodes of replicas and save.