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Initialize a Node

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    A new Couchbase Server node can be initialized, to establish node-specific paths for local storage.

    Understanding Initialization

    Following installation and start-up of Couchbase Server, a node must be:

    • Initialized, whereby its disk-paths for data, indexes, analytics, and eventing can be established.

    • Provisioned, whereby all other details, including Full Administrator credentials, service assignments, and memory quota-definitions are established.

    Optionally, initialization can be performed explicitly and independently of provisioning, as a prior process, in order to establish custom disk-paths. When the node is subsequently provisioned, these are preserved (unless, as is possible with UI-based provisioning, they are optionally overwritten, and the node is thus re-initialized).

    If initialization is not explicitly performed, it will occur as part of the eventual provisioning process, and default disk-path values will be applied.

    Note that disk-paths cannot be changed after a node has been provisioned, and has thus either become a cluster of one node, or has been added to a cluster of other nodes.

    Examples on This Page

    The examples in the subsections below show how to initialize the same node; using the CLI, and the REST API respectively. Note that UI-based initialization only be performed as part of the overall provisioning process.

    The examples assume:

    • Couchbase Server has been installed and started.

    • The IP address of the node is 10.142.181.103.

    Initialize a Node with the CLI

    To initialize a node with the CLI, use the node-init command, as follows:

    couchbase-cli node-init -c 10.142.181.103 \
    -u placeholdername -p placeholderpwd \
    --node-init-data-path /opt/couchbase/var/lib/couchbase/data \
    --node-init-index-path /opt/couchbase/var/lib/couchbase/data \
    --node-init-eventing-path /opt/couchbase/var/lib/couchbase/data \
    --node-init-analytics-path /opt/couchbase/var/lib/couchbase/data \
    --node-init-hostname node1-devcluster.com \
    --ipv4

    This initializes the disk-paths for data, indexes, eventing, and analytics on node 10.142.181.103 to the values shown. Note that the command requires that a username and password be specified, although the node has not yet been provisioned with credentials. Placeholders are therefore provided: these can be overwritten during subsequent provisioning. The command additionally specifies IPv4 as the address family for the node, and assigns the node a hostname of node1-devcluster.com. To specify IPv6, use the --ipv6 flag instead.

    If successful, the operation returns the following:

    SUCCESS: Node initialized

    For more information, see the reference for the node-init command.

    Initialize a Node with the REST API

    To initialize a node with the REST API, use the POST /nodes/self/controller/settings http method and URI, as follows:

    curl  -u Administrator:password -v -X POST \
      http://10.142.181.103:8091/nodes/self/controller/settings \
      -d 'path=%2Fopt%2Fcouchbase%2Fvar%2Flib%2Fcouchbase%2Fdata&' \
      -d 'index_path=%2Fopt%2Fcouchbase%2Fvar%2Flib%2Fcouchbase%2Fidata&' \
      -d 'cbas_path=%2Fopt%2Fcouchbase%2Fvar%2Flib%2Fcouchbase%2Fadata&' \
      -d 'eventing_path=%2Fopt%2Fcouchbase%2Fvar%2Flib%2Fcouchbase%2Fedata&'

    This initializes the disk-paths for data, indexes, analytics, and eventing on node 10.142.181.103 to the values shown.

    For more information on /nodes/self/controller/settings, see Creating a New Cluster.

    Note that to assign a name to the node, the POST /node/controller/rename http method and URI can be used, as follows:

    curl -v -X POST -u Administrator:password \
    http://10.143.192.103:8091/node/controller/rename \
    -d hostname=node1-devcluster.com

    The assigns the name node1-devcluster.com to the node.

    Next Steps

    Following initialization, a node can be provisioned so as to become a Couchbase Cluster of one node. See Create a Cluster for details.