ProxmoxVE-HelperScripts/misc/update-lxcs-cron.sh

#!/usr/bin/env bash

# Copyright (c) 2021-2024 tteck
# Author: tteck (tteckster)
# License: MIT
# https://github.com/tteck/Proxmox/raw/main/LICENSE

echo -e "\n $(date)"
excluded_containers=("$@")
function update_container() {
  container=$1
  name=$(pct exec "$container" hostname)
  echo -e "\n [Info] Updating $container : $name \n"
  os=$(pct config "$container" | awk '/^ostype/ {print $2}')
  case "$os" in
  alpine) pct exec "$container" -- ash -c "apk update && apk upgrade" ;;
  archlinux) pct exec "$container" -- bash -c "pacman -Syyu --noconfirm" ;;
  fedora | rocky | centos | alma) pct exec "$container" -- bash -c "dnf -y update && dnf -y upgrade" ;;
  ubuntu | debian | devuan) pct exec "$container" -- bash -c "apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confold" dist-upgrade -y; rm -rf /usr/lib/python3.*/EXTERNALLY-MANAGED" ;;
  esac
}

for container in $(pct list | awk '{if(NR>1) print $1}'); do
  excluded=false
  for excluded_container in "${excluded_containers[@]}"; do
    if [ "$container" == "$excluded_container" ]; then
      excluded=true
      break
    fi
  done
  if [ "$excluded" == true ]; then
    echo -e "[Info] Skipping $container"
    sleep 1
  else
    status=$(pct status $container)
    template=$(pct config $container | grep -q "template:" && echo "true" || echo "false")
    if [ "$template" == "false" ] && [ "$status" == "status: stopped" ]; then
      echo -e "[Info] Starting $container"
      pct start $container
      sleep 5
      update_container $container
      echo -e "[Info] Shutting down $container"
      pct shutdown $container &
    elif [ "$status" == "status: running" ]; then
      update_container $container
    fi
  fi
done
wait