Creating 2 node GlusterFS for OpenStack Nova/KVM

Add repo and install on both nodes


# wget -P /etc/yum.repos.d http://download.gluster.org/pub/gluster/glusterfs/LATEST/CentOS/glusterfs-epel.repo


# yum -y install glusterfs glusterfs-fuse glusterfs-server




From first node
Start the service and enable it
 # systemctl start glusterd.service
 # systemctl enable glusterd.service
 # gluster peer probe Node2


From Second node


Start the service and enable it
 # systemctl start glusterd.service
 # systemctl enable glusterd.service
 # gluster peer probe Node1




Create Bricks on both nodes


# gluster volume create glustervmstore replica 2 Node1:/vmstore  Node2:/vmstore
# gluster volume start glustervmstore




Since Nova instance will be created under /var/lib/nova/instances, execute the following commands on both nodes


# mount -t glusterfs Node1:/glustervmstore /var/lib/nova/instances


(Replace Node2 with Node1 when executing on second node)


Test it


# cd /var/lib/nova/instances
touch a file and this file will be replicated on the second node too.


Now create a instance in openstack and you will see image on both nodes (If you are getting error, check permission for /var/lib/nova/instance directory)