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Update CLUSTER_MGMT.md

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Philip O'Toole 8 years ago
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CLUSTER_MGMT.md
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@ -32,10 +32,11 @@ It is the nature of clustered systems, nodes can fail at anytime. Depending on t
If an rqlite process crashes, it is safe to simply to restart it. The node will pick up any changes that happened on the cluster while it was down. If an rqlite process crashes, it is safe to simply to restart it. The node will pick up any changes that happened on the cluster while it was down.
# Growing a cluster # Growing a cluster
You can grow a cluster simply by joining a new node to an existing cluster, via the leader, at anytime. The new will pick up changes that have occurred on the cluster since it started up.
# Replacing a node # Replacing a node
If a node fails completely and is not coming back -- a complete loss -- then it must be first removed from the cluster. To remove a node from a cluster, execute the following command: If a node fails completely and is not coming back -- a complete loss -- then it must be first removed from the cluster. To remove a node from a cluster, execute the following command:
``` ```
curl -XDELETE http://localhost:4001/remove -d '{"addr": "<node raft address>"}' curl -XDELETE http://localhost:4001/remove -d '{"addr": "<node raft address>"}'
``` ```
assuming `localhost` is the address of the cluster leader. assuming `localhost` is the address of the cluster leader. Removing a node does not change the number of nodes required to reach quorum, so you must add a new node to cluster. To do so, imply follow the instructions for _Growing a cluster_.

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