Yes. As Gluu Server Administrator you should follow couple of points if you want to reboot your Gluu Cluster. Please note that: **Do not hard reboot your VM or do not reboot your all servers together / same time** **If you want to reboot your Gluu cluster, you need to reboot one server at a time** Here are steps which should be followed for a successful Gluu Cluster rebooting: * SSH into VM. * Become root * Stop gluu server chroot containter with command: /etc/init.d/gluu-server stop * You will observe that one after another services are shutting down.... you will see some messages like below: Shutting down Gluu Chroot Server: Stopping httpd: [ OK ] Stopping shibd: [ OK ] Stopping Tomcat Servlet Container... Stopped Tomcat Servlet Container. ..... ..... * Double check if all services are stopped properly or not. You can use command like: pgrep -l 'java|shibd|memcached|nutcrecker|mysqld|httpd' * Now reboot your VM. * SSH into Node1. * Start gluu server chroot containter ( it's opposite of #3 ) with command: /etc/init.d/gluu-server start * Wait for 5-10 mins, Your Gluu-server should start and begin processing requests. * Now let's move for second node ( node2 ) and follow above steps. That's how your should reboot your all VMs one after another in your cluster setup.