#!/usr/bin/env bash # Copyright (c) 2021-2025 tteck # Author: tteck (tteckster) # License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE set -eEuo pipefail function header_info() { clear cat <<"EOF" _______ __ __ ______ _ / ____(_) /__ _______ _______/ /____ ____ ___ /_ __/____(_)___ ___ / /_ / / / _ \/ ___/ / / / ___/ __/ _ \/ __ `__ \ / / / ___/ / __ `__ \ / __/ / / __(__ ) /_/ (__ ) /_/ __/ / / / / / / / / / / / / / / / / / /_/ /_/_/\___/____/\__, /____/\__/\___/_/ /_/ /_/ /_/ /_/ /_/_/ /_/ /_/ /____/ EOF } BL="\033[36m" RD="\033[01;31m" CM='\xE2\x9C\x94\033' GN="\033[1;92m" CL="\033[m" header_info echo "Loading..." whiptail --backtitle "Proxmox VE Helper Scripts" \ --title "About fstrim (LXC)" \ --msgbox "The 'fstrim' command releases unused blocks back to the storage device. This only makes sense for containers on SSD, NVMe, Thin-LVM, or storage with discard/TRIM support.\n\nIf your root filesystem or container disks are on classic HDDs, thick LVM, or unsupported storage types, running fstrim will have no effect.\n\nRecommended:\n- Use fstrim only on SSD, NVMe, or thin-provisioned storage with discard enabled.\n- For ZFS, ensure 'autotrim=on' is set on your pool.\n\nSee: https://pve.proxmox.com/wiki/Shrinking_LXC_disks" 16 88 ROOT_FS=$(df -Th "/" | awk 'NR==2 {print $2}') if [ "$ROOT_FS" != "ext4" ]; then whiptail --backtitle "Proxmox VE Helper Scripts" \ --title "Warning" \ --yesno "Root filesystem is not ext4 ($ROOT_FS).\nContinue anyway?" 12 80 || exit 1 fi NODE=$(hostname) EXCLUDE_MENU=() MSG_MAX_LENGTH=0 # Build EXCLUDE_MENU for main checklist while read -r TAG ITEM; do OFFSET=2 ((${#ITEM} + OFFSET > MSG_MAX_LENGTH)) && MSG_MAX_LENGTH=$((${#ITEM} + OFFSET)) EXCLUDE_MENU+=("$TAG" "$ITEM " "OFF") done < <(pct list | awk 'NR>1 {print $1, $2}') excluded_containers_raw=$(whiptail --backtitle "Proxmox VE Helper Scripts" \ --title "Containers on $NODE" \ --checklist "\nSelect containers to skip from trimming:\n" \ 20 $((MSG_MAX_LENGTH + 32)) 10 "${EXCLUDE_MENU[@]}" 3>&1 1>&2 2>&3) [ $? -ne 0 ] && exit read -ra EXCLUDED <<<$(echo "$excluded_containers_raw" | tr -d '"') # Find all stopped containers STOPPED_MENU=() for container in $(pct list | awk 'NR>1 {print $1}'); do state=$(pct status "$container" | awk '{print $2}') if [[ "$state" != "running" ]]; then CTNAME=$(pct config "$container" | awk -F ': ' '/^hostname:/ {print $2}') STOPPED_MENU+=("$container" "$CTNAME" "OFF") fi done TO_START=() if [ ${#STOPPED_MENU[@]} -gt 0 ]; then selected=$(whiptail --backtitle "Proxmox VE Helper Scripts" \ --title "Stopped LXC Containers" \ --checklist "\nSome LXC containers are currently stopped.\nWhich ones do you want to temporarily start for the trim operation?\n(They will be stopped again afterwards)\n" \ 20 80 10 "${STOPPED_MENU[@]}" 3>&1 1>&2 2>&3) [ $? -ne 0 ] && exit read -ra TO_START <<<$(echo "$selected" | tr -d '"') fi declare -A WAS_STOPPED for ct in "${TO_START[@]}"; do WAS_STOPPED["$ct"]=1 done function trim_container() { local container="$1" header_info echo -e "${BL}[Info]${GN} Trimming ${BL}$container${CL} \n" local before_trim after_trim before_trim=$(lvs --noheadings -o lv_name,data_percent | awk -v ctid="vm-${container}-disk-0" '$1 == ctid {gsub(/%/, "", $2); print $2}') echo -e "${RD}Data before trim $before_trim%${CL}" pct fstrim "$container" after_trim=$(lvs --noheadings -o lv_name,data_percent | awk -v ctid="vm-${container}-disk-0" '$1 == ctid {gsub(/%/, "", $2); print $2}') echo -e "${GN}Data after trim $after_trim%${CL}" sleep 0.5 } for container in $(pct list | awk 'NR>1 {print $1}'); do if [[ " ${EXCLUDED[*]} " =~ " $container " ]]; then header_info echo -e "${BL}[Info]${GN} Skipping $container (excluded)${CL}" sleep 0.5 continue fi if pct config "$container" | grep -q "template:"; then header_info echo -e "${BL}[Info]${GN} Skipping $container (template)${CL}\n" sleep 0.5 continue fi state=$(pct status "$container" | awk '{print $2}') if [[ "$state" != "running" ]]; then if [[ -n "${WAS_STOPPED[$container]:-}" ]]; then header_info echo -e "${BL}[Info]${GN} Starting $container for trim...${CL}" pct start "$container" sleep 2 else header_info echo -e "${BL}[Info]${GN} Skipping $container (not running, not selected)${CL}" sleep 0.5 continue fi fi trim_container "$container" # Optionally stop container again if we started it if [[ -n "${WAS_STOPPED[$container]:-}" ]]; then if whiptail --backtitle "Proxmox VE Helper Scripts" \ --title "Stop container again?" \ --yesno "Container $container was started for the trim operation.\n\nDo you want to stop it again now?" 10 60; then header_info echo -e "${BL}[Info]${GN} Stopping $container again...${CL}" pct stop "$container" sleep 1 else header_info echo -e "${BL}[Info]${GN} Leaving $container running as requested.${CL}" sleep 1 fi fi done header_info echo -e "${GN}Finished, LXC Containers Trimmed.${CL} \n" exit 0