Add nodes via REST API
With the REST API, you can add nodes to the cluster by providing the IP address, administrator username, and password as part of the data payload.
curl command to add a new node.
If you are adding another service than data, which is the default, specify that service index or n1ql:
> curl -u cluster-username:cluster-password localhost:8091/controller/addNode\ -d "hostname=192.168.0.68&user=node-username&password=node-password&services=n1ql"