#!/bin/bash
# --- Configuration Settings ---
# Directory where backup archives will be stored.
# IMPORTANT: Ensure this path has enough free space and proper permissions.
# This path is now set to a mount point typically used for Proxmox storage.
BACKUP_DIR="/mnt/pve/hostbackup/dump"
# Timestamp format for the backup filename (YearMonthDay_HourMinuteSecond).
DATE_FORMAT=$(date +%Y%m%d_%H%M%S)
# Full filename of the backup archive.
BACKUP_FILE="proxmox_config_${DATE_FORMAT}.tar.zst"
# Log file for recording script execution details.
LOG_FILE="${BACKUP_DIR}/backup_log_${DATE_FORMAT}.log"
# List of critical configuration paths to back up.
# !!! IMPORTANT: Verify these paths exist on your Proxmox host. !!!
CONFIG_PATHS=(
"/etc/pve" # Proxmox cluster configuration, VM/LXC configs, storage.cfg, etc. (MOST IMPORTANT)
"/etc/network/interfaces" # Network configuration of the Proxmox host.
"/etc/hosts" # Hostname to IP address mappings.
"/etc/resolv.conf" # DNS resolver configuration.
"/etc/hostname" # Hostname of the Proxmox server.
# Add the following paths if you have customized them:
# "/etc/fstab" # Filesystem table (if custom mounts are configured).
# "/etc/vzdump.conf" # vzdump backup configuration (if customized).
)
# --- Script Start ---
echo "--- Proxmox Configuration Backup Script (using tar.zst) ---" | tee -a "$LOG_FILE"
echo "Backup started at: $(date)" | tee -a "$LOG_FILE"
echo "-----------------------------------------" | tee -a "$LOG_FILE"
# Check if 'zstd' command is available
if ! command -v zstd &> /dev/null
then
echo "ERROR: 'zstd' command not found. Please install it (e.g., 'apt install zstd')." | tee -a "$LOG_FILE"
exit 1
fi
# 1. Check and create the backup directory
# It's crucial that /mnt/pve/hostbackup/dump is correctly mounted and accessible.
if [ ! -d "$BACKUP_DIR" ]; then
echo "Creating backup directory: $BACKUP_DIR" | tee -a "$LOG_FILE"
mkdir -p "$BACKUP_DIR"
if [ $? -ne 0 ]; then
echo "ERROR: Failed to create backup directory $BACKUP_DIR. Please ensure the mount point is accessible and writable." | tee -a "$LOG_FILE"
exit 1
fi
else
echo "Using existing backup directory: $BACKUP_DIR" | tee -a "$LOG_FILE"
fi
# 2. Create a temporary directory for copying config files
TEMP_CONFIG_DIR="${BACKUP_DIR}/temp_config_${DATE_FORMAT}"
echo "Creating temporary directory: $TEMP_CONFIG_DIR" | tee -a "$LOG_FILE"
mkdir -p "$TEMP_CONFIG_DIR"
if [ $? -ne 0 ]; then
echo "ERROR: Failed to create temporary directory." | tee -a "$LOG_FILE"
exit 1
fi
# Loop through each path and copy it to the temporary directory.
for path in "${CONFIG_PATHS[@]}"; do
if [ -e "$path" ]; then # Check if the path exists
echo "Copying: $path" | tee -a "$LOG_FILE"
cp -r "$path" "$TEMP_CONFIG_DIR/"
if [ $? -ne 0 ]; then
echo "WARNING: Failed to copy $path." | tee -a "$LOG_FILE"
fi
else
echo "WARNING: Path '$path' not found, skipping." | tee -a "$LOG_FILE"
fi
done
# 3. Compress the copied configuration files into a .tar.zst archive
echo "Compressing configuration files to: ${BACKUP_DIR}/${BACKUP_FILE}" | tee -a "$LOG_FILE"
# Use 'tar' with '--use-compress-program=zstd' for zstd compression.
# -c: create, -v: verbose, -f: file (specify filename)
# Change directory to TEMP_CONFIG_DIR before archiving to ensure relative paths within the tar.
pushd "$TEMP_CONFIG_DIR" > /dev/null
tar -cvf "${BACKUP_DIR}/${BACKUP_FILE}" --use-compress-program=zstd ./*
if [ $? -ne 0 ]; then
echo "ERROR: Failed to compress backup file using 'tar' and 'zstd'." | tee -a "$LOG_FILE"
popd > /dev/null # Go back to the original directory
rm -rf "$TEMP_CONFIG_DIR" # Clean up temp directory even on error
exit 1
fi
popd > /dev/null # Go back to the original directory
# 4. Remove the temporary directory
echo "Removing temporary directory: $TEMP_CONFIG_DIR" | tee -a "$LOG_FILE"
rm -rf "$TEMP_CONFIG_DIR"
if [ $? -ne 0 ]; then
echo "WARNING: Failed to remove temporary directory $TEMP_CONFIG_DIR." | tee -a "$LOG_FILE"
fi
# 5. Summarize results
echo "-----------------------------------------" | tee -a "$LOG_FILE"
echo "Backup completed at: $(date)" | tee -a "$LOG_FILE"
echo "Backup file: ${BACKUP_DIR}/${BACKUP_FILE}" | tee -a "$LOG_FILE"
echo "Log file: $LOG_FILE" | tee -a "$LOG_FILE"
echo "--- Script End ---" | tee -a "$LOG_FILE"
exit 0
