Proxmox stuff

This is a collection of stuff that I wrote for Proxmox. Its possble to use the Ansible roles I wrote or to use the bash scripts for the backup & restore tasks.

Ansible

Small Ansible playbook and role collection for Proxmox related stuff.

prox_config_backup

I just wrote this script quick and dirty. Some people use it on a daily basis (including me).

There might be a PBS backup feature to backup PVE cluster config in the near future provided by the Proxmox team. But since this was only mentioned on the roadmap we still have to wait.

Meanwhile I manage all PVE nodes with Ansible and usually have no need to restore configuration unless all cluster nodes failed at once. But having a full cluster config backup is still useful and makes PVE admins sleep well at night (or day).

The script must be run as root, and can be run from cron or an interactive terminal.

Backup

• Download the script
  cd /root/; wget -qO- https://raw.githubusercontent.com/DerDanilo/proxmox-stuff/master/prox_config_backup.sh
• Set the permanent backups directory environment variable export BACK_DIR="/path/to/backup/directory" or edit the script to set the $DEFAULT_BACK_DIR variable to your preferred backup directory
• Make the script executable chmod +x ./prox_config_backup.sh
• Shut down ALL VMs + LXC Containers if you want to go the safe way. (Not required)
• Run the script ./prox_config_backup.sh

Notification

The script supports healthchecks.io notifications, either to the hosted service, or a self-hosted instance. The notification sends during the final cleanup stage, and either returns 0 to tell Healthchecks that the command was successful, or the exit error code (1-255) to tell Healthchecks that the command failed. To enable:

• Set the $HEALTHCHECK variable to 1
• Set the $HEALTHCHECK_URL variable to the full ping URL for your check. Do not include anything after the UUID, the status flag will be added by the script.

Restore

❗ ONLY USE THIS SCRIPT ON THE SAME NODE / PROXMOX VERSION, OTHERWISE IT WILL BREAK YOUR FRESH PROXMOX INSTALLATION. IT WILL ALSO FAIL IF YOU ARE RUNNING A CLUSTER! ❗

For more info also see #5.

Bash Scripts

Cron

To set up a automatic cron job on a monthly (/etc/cron.weekly or /etc/cron.daily can be used to!) schedule, running the prox_config_backup script, follow these steps:

wget https://raw.githubusercontent.com/DerDanilo/proxmox-stuff/master/prox_config_backup.sh -O /etc/cron.monthly/prox_config_backup

Change DEFAULT_BACK_DIR="/mnt/pve/truenas_backup/pve" and MAX_BACKUPS=5 to the values you want!

Optional: Execute run-parts to see if it contains errors:

run-parts -v --test /etc/cron.monthly

Manually

On my machine, you end up with a GZipped file of about 1-5 MB with a name like "proxmox_backup_proxmoxhostname_2017-12-02.15.48.10.tar.gz".
Depending upon how you schedule it and the size of your server, that could eventually become a space issue so don't
forget to set up some kind of archive maintenance.

To restore, move the file back to proxmox with cp, scp, webmin, a thumb drive, whatever.
I place it back into the /var/tmp directory from where it came.

# Unpack the original backup
tar -zxvf proxmox_backup_proxmoxhostname_2017-12-02.15.48.10.tar.gz
# unpack the tared contents
tar -xvf proxmoxpve.2017-12-02.15.48.10.tar
tar -xvf proxmoxetc.2017-12-02.15.48.10.tar
tar -xvf proxmoxroot.2017-12-02.15.48.10.tar

# If the services are running, stop them:
for i in pve-cluster pvedaemon vz qemu-server; do systemctl stop $i ; done

# Copy the old content to the original directory:
cp -avr /var/tmp/var/tmp/etc /etc
cp -avr /var/tmp/var/tmp/var /var
cp -avr /var/tmp/var/tmp/root /root

# And, finally, restart services:
for i in qemu-server vz pvedaemon pve-cluster; do systemctl start $i ; done

If nothing goes wrong, and you have separately restored the VM images using the default Proxmox process.
You should be back where you started. But let's hope it never comes to that.

Script

• Download the script
  cd /root/; wget -qO- https://raw.githubusercontent.com/DerDanilo/proxmox-stuff/master/prox_config_restore.sh
• Make the script executable chmod +x ./prox_config_restore.sh
• Run the script ./prox_config_restore.sh proxmox_backup_proxmoxhostname_2017-12-02.15.48.10.tar.gz

Sources

http://ziemecki.net/content/proxmox-config-backups