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Node Addition and Removal

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    Nodes can be added to and removed from a cluster, by means of the REST API.

    APIs in this Section

    A Couchbase-Server cluster consists of one or more nodes, each of which is a system running an instance of Couchbase Server. Nodes can be added to and removed from the cluster, by means of the REST API.

    The routine for adding a new node to the existing cluster is executed on the existing cluster. The routine for joining an existing cluster is executed on the new node. These procedures are described in detail in Nodes.

    Removal provides the most highly controlled means of taking a node out of a cluster. Any node, whatever its service-configuration, can be removed. However, removal should be used only when all nodes in the cluster are responsive, and those intended to remain in the cluster after removal have the capacity to support the results. This is described in detail in Removal.

    The REST API described in this section is summarized below.

    HTTP Method URI Documented at

    POST

    /controller/addNode

    Adding Nodes to Clusters

    POST

    /node/controller/doJoinCluster

    Joining Nodes to Clusters

    POST

    /controller/ejectNode

    Removing Nodes from Clusters