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Adding a Node to a Cluster
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A server will be in a
Passivestate in either one of the following:- When the server is started for the very first time
- When the server is removed from an existing cluster
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To make a server become part of a cluster you can do either of the following:
- Bootstrap Cluster
- Adding another node to this server cluster (will cause both to be part of the same cluster)
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Performing any RAFT command on the
Passiveserver will make the server become part of a cluster, e.g.:- Adding a license
- Creating a database on this server
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In this page:
Bootstrap Cluster
Click 'Bootstrap Cluster' to make the current passive server a part of a cluster.
Note: This option is only available when the server is in the Passive state.
Add Another Node to the Cluster
Click to add a new node
- Enter the server URL of the new node
- Manually select a Node Tag for the new node.
The node tage is a unique identifier made up of 1-4 uppercase letters. By default, the tag of the
first node in a cluster is
A, the secondB, and so on. AfterZ, the next node will get the tagAA, the nextAB, and so on. - Decide whether to add the new node as a
Member-or- as aWatcher(difference explained in Cluster View) - Toggle whether to use all available cores on the machine for this node
- Set a maximum number of cores that can be used by this node
- Click Test connection to verify that your cluster can communicate with the server at the specified URL
When done, click Save to add this server as a node to the cluster
This operation can also be done programatically. Read more here.
A Cluster with 2 nodes
A cluster with 2 nodes
Now your cluster contains 2 nodes:
- The server running on localhost:8081 shows as Node A and is the
Leaderof the cluster. - The server running on localhost:8082 shows as Node B and is a
Memberof the cluster.
More nodes can be added as needed.