proxmox-cleanup-templates

#!/usr/bin/env bash
# ==========================================================================
#    __   ____  __   ___                       ___      _ _    _
#    \ \ / /  \/  | |_ _|_ __  __ _ __ _ ___  | _ )_  _(_) |__| |___ _ _
#     \ V /| |\/| |  | || '  \/ _` / _` / -_) | _ \ || | | / _` / -_) '_|
#      \_/ |_|  |_| |___|_|_|_\__,_\__, \___| |___/\_,_|_|_\__,_\___|_|
#                                  |___/
#
#   --- Virtual Machine Image Builder and System Installation Scripts ---
#            https://www.nntb.no/~dreibh/vmimage-builder-scripts/
# ==========================================================================
#
# VM Image Builder Scripts
# Copyright (C) 2017-2026 by Thomas Dreibholz
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Contact: thomas.dreibholz@gmail.com

# Bash options:
set -euo pipefail


# ====== Check arguments ====================================================
dryRun=1
if [ $# -gt 0 ] ; then
   if [ "$1" == "--really-remove" ] ; then
      dryRun=0
   else
      echo >&2 "Usage: $0 [--really-remove]"
      exit 1
   fi
fi


# ====== Identify templates and VMs for removal =============================
echo -e "\x1b[34mLooking for VMs/templates to clean up ...\x1b[0m"
qm list | sort -k2,2 -k1,1rn | awk '
BEGIN {
   lastName="";
   lastID=-1;
}

/^[ ]*2[0-9][0-1][0-9][0-3][0-9][0-9][0-9][0-9] / {
   id=$1;
   name=$2;
   status=$3;
   if(id ~ /^2[0-9][0-1][0-9][0-3][0-9][0-9][0-9][0-9]$/ ) {
      if(status == "running") {
         print "=> " name " is still running, but should be a not-running template!" | "cat 1>&2"
         print id " " name " " status;
      }
      else if(status == "stopped") {
         if(name == lastName) {
            # This is an older version of the same template!
            if(id < lastID) {
               print "=> " name " (ID " id ") is older than " lastName " (ID " lastID ")" | "cat 1>&2"
               print "" id " " name " " status;
            }
            else {
               print "Something is wrong! id:" id " >= lastID:" lastID | "cat 1>&2"
               exit 1;
            }
         }
         else {
            lastName = name;
            lastID   = id;
         }
      }
   }
}
' | (
   echo -e "\x1b[34mCleaning up obsolete VMs/templates ...\x1b[0m"
   while read -r id name status ; do
      if [[ ! "${id}" =~ ^2[0-9][0-1][0-9][0-3][0-9][0-9][0-9][0-9]$ ]] ; then
         echo >&2 "ERROR: ID is not in the expected format! Something is wrong!"
         exit 1
      fi
      if [ "${dryRun}" -eq 0 ] ; then
         echo -e "\x1b[35mRemoving ${id} (${name}) with status \"${status}\" ...\x1b[0m"
         echo -e "\x1b[36mqm stop ${id}\x1b[0m"
         qm stop "${id}"
         echo -e "\x1b[36mqm destroy ${id}\x1b[0m"
         qm destroy "${id}"
      else
         echo -e "\x1b[35mDRY RUN ONLY: Would remove ${id} (${name}) with status \"${status}\" ...\x1b[0m"
         echo -e "\x1b[36mqm stop ${id}\x1b[0m"
         echo -e "\x1b[36mqm destroy ${id}\x1b[0m"
      fi
   done
)