Changing of gluster peers hostnames

Simple tutorial - how to change peer’s hostnames in gluster cluster without destroing anything

Run on all gluster nodes

1. Stop glusterd processes
   sudo systemctl stop glusterd
2. Change hostnames
   sudo hostnamectl set-hostname $hostname
3. Remove cloud-init hostname* modules from cloud_init_modules list if you are using cloud vm’s
   sudo vi /etc/cloud-init/cloud.cfg
4. Change hosts file
   sudo vi /etc/hosts
5. Recursively change all old hostnames with new one’s in /var/lib/glusterd directory
   sudo find ./ -type f -exec sed -i 's/$OLD/$NEW/g' {} \;
6. Move brick folders to new destination based on new hostnames
   ##EXAMPLE sudo cd /var/lib/glusted/vols/gluster_shared_storage/ sudo mv test-nfs-rk-2\:-var-lib-glusterd-ss_brick gluster-nfs-1\:-var-lib-glusterd-ss_brick
7. Start glusterd process
   sudo systemctl start glusterd