Changing Host Location

Once a host has started running services in the cluster, its topology is cached in the MDS and cannot be changed. All new services created on the host will use that cached information. If you need to modify the host location information, do the following:

1. Kill and remove CS and client services running on the host with the pstorage-rm-cs and umount commands as described in Removing Chunk Servers and Removing Clients , respectively.
2. Set /etc/pstorage/host_id to another unique ID, e.g., generated with /dev/urandom .
3. Adjust /etc/pstorage/location as required.
4. Recreate the CS and client services: mount the cluster and create new CS instances using the pstorage-make-cs command as described in Setting Up Chunk Servers and Setting Up Clients , respectively.