Time based expiration

[jlauro]

Generally PBS retention and expiration works fine. However, if you recycle vms frequently, and don't reuse vmid numbers the last backups never go away. This is somewhat related to https://bugzilla.proxmox.com/show_bug.cgi?id=6074 which isn't exactly the same, but at least provides a way to go through thousands of snapshots and forget the oldest ones...

Anyways, fill in the PBS_REPOSITORY and PBS_PASSWORD along with changing the number of days and it will find all your old backups, generally from vm that have either gone away, or moved to a different namespace or changed vmid. It will do a dry-run as is and you can pipe it's output to bash (be sure to have PBS_REPOSITORY and PBS_PASSWORD export in the environment if you | bash), or you can drop the echo from 4 lines from the bottom so it runs instead of echoing.

This functionality really should be in the gui, but... at least this provides some automation to clearing out old vms...

#! /bin/bash

export PBS_REPOSITORY='root@pam@127.0.0.1:8007:backupdata'
export PBS_PASSWORD='REDACTED'
OLDEST=$( date -d "180 days ago" +%s )

for NS in $( proxmox-backup-client namespace list ) ; do
  proxmox-backup-client snapshot list --ns "$NS" |
    grep vm | awk '{ print $2 }' | sed 's#/# #g' |
    while read vm id dt ; do
      if [ "$vm" != "vm" ] ; then
        echo "Found $vm when expecting snapshot to start with vm"
        echo "Aborting script"
        exit 1
      fi
      if [ $( date -d "$dt" +%s ) -lt $OLDEST ] ; then
        echo proxmox-backup-client snapshot forget --ns="$NS" "$vm/$id/$dt"
      fi
    done
done