Configuration files used in this blog are available [here](http://github.com/arun-gupta/couchbase-kubernetes/tree/master/cluster). Let’s create the Kubernetes resources to create the Couchbase cluster.
**Create Couchbase “master” Replication Controller**
Couchbase master RC can be created using the following configuration file:
```
apiVersion: v1
kind: ReplicationController
metadata:
name: couchbase-master-rc
spec:
replicas: 1
selector:
app: couchbase-master-pod
template:
metadata:
labels:
app: couchbase-master-pod
spec:
containers:
- name: couchbase-master
image: arungupta/couchbase:k8s
env:
- name: TYPE
value: MASTER
ports:
- containerPort: 8091
----
apiVersion: v1
kind: Service
metadata:
name: couchbase-master-service
labels:
app: couchbase-master-service
spec:
ports:
- port: 8091
selector:
app: couchbase-master-pod
type: LoadBalancer
```
This configuration file creates a couchbase-master-rc Replication Controller. This RC has one replica of the pod created using the arungupta/couchbase:k8s image. This image is created using the Dockerfile [here](http://github.com/arun-gupta/couchbase-kubernetes/blob/master/cluster/Dockerfile). This Dockerfile uses a [configuration script](https://github.com/arun-gupta/couchbase-kubernetes/blob/master/cluster/configure-node.sh) to configure the base Couchbase Docker image. First, it uses [Couchbase REST API](http://developer.couchbase.com/documentation/server/current/rest-api/rest-endpoints-all.html) to setup memory quota, setup index, data and query services, security credentials, and loads a sample data bucket. Then, it invokes the appropriate [Couchbase CLI](http://developer.couchbase.com/documentation/server/current/cli/cbcli-intro.html) commands to add the Couchbase node to the cluster or add the node and rebalance the cluster. This is based upon three environment variables: