How to perform a mass migration of OpenVZ containers?

Moving OpenVZ containers from one hardware node to another can be a bit tricky, but it is certainly doable. The basic idea is to make backups of the containers on the source node, then restore them on the destination node.

Below are the steps you can take to perform a mass migration of OpenVZ containers:

1. Back up the containers on the source node:

You can use `vzdump` to back up your containers. The command below will back up all containers on the source node. \`\`\`sh vzdump —all —dumpdir /path/to/backups \`\`\` This will create a backup for each container in `/path/to/backups`. Each backup will have a name like `vzdump-openvz-.tgz`, where `` is the container ID.

1. Transfer the backups to the destination node:

After the backups have been created, you will need to transfer them to the destination node. You can use `rsync` or `scp` as below: \`\`\`sh rsync -avz /path/to/backups user@destination:/path/to/backups or scp /path/to/backups/\* user@destination:/path/to/backups \`\`\` This will copy all the backups to the `/path/to/backups` directory on the destination node.

1. Restore the containers on the destination node:

Once the backups have been transferred, you can restore the containers on the destination node using `vzrestore`. Go through each backup file and restore it: \`\`\`sh for file in /path/to/backups/\*.tgz; do vzrestore $file done \`\`\` Replace `` with the container ID. The container ID must be the same as it was on the source node. If it is not, you will need to specify a new ID.

1. Start the containers on the destination node:

Finally, once all containers have been restored, you can start them on the destination node using `vzctl start `.

Note: You may need to adjust or fine tune these steps based on your exact scenario and the server configurations. Also, before removing any data or containers from the source node, please make sure everything is working fine at the destination node.