This is a REST request made to a Couchbase cluster to add a given node to the cluster. You add a new node with the at the RESTful endpoint server_ip:port/controller/addNode. You will need to provide an administrative username and password as parameters:

shell> curl -u Administrator:password \
    10.2.2.60:8091/controller/addNode \
    -d "hostname=10.2.2.64&user=Administrator&password=password"

Here we create a request to the cluster at 10.2.2.60:8091 to add a given node by using method, controller/addNode and by providing the IP address for the node as well as credentials. If successful, Couchbase Server will respond:

HTTP/1.1 200 OK
{"otpNode":"ns_1@10.4.2.6"}