问题
I have having 5 node cluster of Riak Kv, having ring size as given below
riak@172.XX.XX.10 19.9
riak@172.XX.XX.11 19.9
riak@172.XX.XX.12 19.9
riak@172.XX.XX.13 20.0
riak@172.XX.XX.14 20.3
but after removing node
riak@172.XX.XX.12 from cluster forcely
by command sudo riak-admin force-remove -f riak@172.XX.XX.12
ring size becomes as given below
riak@172.XX.XX.10 25.0
riak@172.XX.XX.11 25.0
riak@172.XX.XX.13 25.0
riak@172.XX.XX.14 25.0
but I lossed some data , is there any procedure to recover that OR Procedure to remove node from cluster without lossing any data.
回答1:
The correct procedure to remove a node from a riak cluster is described here https://www.tiot.jp/riak-docs/riak/kv/2.2.3/using/cluster-operations/adding-removing-nodes/#removing-a-node-from-a-cluster.
The correct procedure from the node that you want remove is:
riak-admin cluster leave
riak-admin cluster plan
riak-admin cluster commit
In this way the data are migrated from leaving node to the other nodes. The command riak-admin cluster plan is not necessary but show the actual pending plan that will be committed with riak-admin cluster commit command.
You can also do a similar operation from a different node like this:
riak-admin cluster leave <node>
where <node> is the node name as specified in the node’s configuration files (for example: riak@192.168.2.1) and then as before, check and commit plan:
riak-admin cluster plan # to see the actual plan
riak-admin cluster commit
来源：https://stackoverflow.com/questions/46292621/riak-force-remove-node-from-riak-kv-cluster