Decommissioning StorageOS Nodes
StorageOS nodes can be decommissioned and removed from the cluster using the StorageOS CLI.
This functionality is only available when StorageOS is deployed with
KV_BACKEND=etcd, so the KV store is external to StorageOS.
There are safeguards to make sure data is not lost unintentionally. Only nodes
Offline can be removed from the StorageOS cluster. Note that once
removed from the cluster, nodes may not partake in StorageOS operations, and
may not run container applications that require StorageOS backed persistent
The recommended procedure is as follows.
Cordon the node
$ storageos node cordon node03 node03
Drain the node
$ storageos node drain node03 node03
Wait until the node drain is finished. Check the volumes located on that node with
storageos node lsand wait until there are no Masters or Replicas on the drained node. If there are no eligible nodes for replicas to be created on, the drained node will keep hosting them.
Stop the node
Delete the node from the cluster
$ storageos node delete node03 node03