Shutting Down and Starting Up Cluster Nodes

To shut down a Storage cluster completely, do the following:

1. Stop and disable the following services: shaman, pdrs, vstorage-iscsi, and va-agent (in case Virtuozzo Automator is installed):

   1 2	# systemctl stop shaman pdrs vstorage-iscsid va-agent # systemctl disable shaman pdrs vstorage-iscsid va-agent

2. Check what containers and virtual machines are running in the cluster with the prlctl list command and shut them down using prlctl stop. For example:

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   # prlctl list UUID STATUS IP_ADDR T NAME {8330ff27-5e84-4d13-a69c-63f3f8a3c516} running - VM MyVM # prlctl stop MyVM Stopping the VM... The VM has been successfully stopped.

3. Stop and disable the prl-disp and vz services:

   1 2	# systemctl stop prl-disp vz # systemctl disable prl-disp vz

4. If you use Storage GUI, also stop and disable the vstorage-ui-agent service:

   1 2	# systemctl stop vstorage-ui-agent # systemctl disable vstorage-ui-agent

5. Stop all clients in the cluster. To do this, on each client:

   1. Make sure no storage files are opened using the lsof utility. For example, for the stor1 cluster, run

      1	# lsof +D /vstorage/stor1

   2. Unmount the cluster file system using the umount command. For example, if the cluster is mounted to the /vstorage/stor1 directory on a client, you can unmount it as follows:

      1	# umount /vstorage/stor1

   3. Disable the automatic mounting of the cluster by removing the cluster entry from the /etc/fstab file.

6. Stop and disable all CS and MDS servers:

   1 2	# systemctl stop vstorage-csd.target vstorage-mdsd.target # systemctl disable vstorage-csd.target vstorage-mdsd.target

7. Shut down cluster servers.

To start up a Storage cluster again, do the following:

1. Power on cluster servers.

2. Start and enable all MDS and chunk servers:

   1 2	# systemctl start vstorage-mdsd.target vstorage-csd.target # systemctl enable vstorage-mdsd.target vstorage-csd.target

3. Enable the automatic mounting of the cluster by adding the cluster entry to the /etc/fstab file and mount the cluster file system using the mount command.

4. If you use Storage GUI, also start and enable the vstorage-ui-agent service:

   1 2	# systemctl start vstorage-ui-agent # systemctl enable vstorage-ui-agent

5. Start and enable the following services: prl-disp, vz, shaman, pdrs, vstorage-iscsid, and va-agent (in case Virtuozzo Automator is installed):

   1 2	# systemctl start prl-disp vz shaman pdrs vstorage-iscsid va-agent # systemctl enable prl-disp vz shaman pdrs vstorage-iscsid va-agent

6. Start containers and virtual machines with the prlctl start command. For example:

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   # prlctl start MyVM Starting the VM... The VM has been successfully started.