mattspeer
88205e510e
Add the -L (--copy-links) flag to rsync calls for systemd units and cron directories to dereference symlinks into actual target files, resolving "Operation not permitted" failures on non-POSIX target filesystems.
137 lines
5.8 KiB
Bash
137 lines
5.8 KiB
Bash
#!/bin/bash
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# ==============================================================================
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# Script: host_backup.sh
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# Description: Securely backs up key host system configuration files (fstab,
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# ddclient, crontabs, systemd units, and installed package lists)
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# into timestamped directories on a mounted backup drive. Includes
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# 30-day retention pruning and ntfy alerts.
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# Usage: sudo ./host_backup.sh
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# Notes: Requires sudo/root privileges to access system configuration files.
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# ==============================================================================
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# ==============================================================================
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# Define Variables for Source, Destination, and Retention
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# ==============================================================================
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BACKUP_MOUNT_POINT="/mnt/5TB-Disk1"
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HOST_BACKUP_BASE="$BACKUP_MOUNT_POINT/backup/server/host"
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RETENTION_DAYS=30
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# Timestamp and Directory Setup
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TIMESTAMP=$(date +"%Y-%m-%d_%H%M%S")
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CURRENT_BACKUP_DIR="$HOST_BACKUP_BASE/backup_$TIMESTAMP"
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LATEST_TXT_FILE="$HOST_BACKUP_BASE/latest.txt"
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# Host Backup Sources
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FSTAB_SOURCE="/etc/fstab"
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DDCLIENT_CONF_SOURCE="/etc/ddclient.conf"
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DDCLIENT_DEFAULT_SOURCE="/etc/default/ddclient"
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SYSTEMD_SOURCE="/etc/systemd/system"
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# ntfy Notification Configuration
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NTFY_TOPIC="Server"
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NTFY_SERVER="https://ntfy.speerfam.net"
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NTFY_TOKEN="tk_3xo9mejjtgemyowzckqw2souo3mux"
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# ==============================================================================
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# Pre-flight Checks
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# ==============================================================================
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# Check if the mount point directory exists and is a mounted filesystem.
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if ! mountpoint -q "$BACKUP_MOUNT_POINT"; then
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echo "Error: '$BACKUP_MOUNT_POINT' is not a mount point. Please ensure the drive is mounted." >&2
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curl -H "Authorization: Bearer $NTFY_TOKEN" -d "Error: Host backup failed. Destination '$BACKUP_MOUNT_POINT' is not mounted." "$NTFY_SERVER/$NTFY_TOPIC" > /dev/null 2>&1
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exit 1
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fi
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# Create target subdirectories for current timestamp run
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mkdir -p "$CURRENT_BACKUP_DIR/os"
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mkdir -p "$CURRENT_BACKUP_DIR/services/ddclient"
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mkdir -p "$CURRENT_BACKUP_DIR/cron"
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mkdir -p "$CURRENT_BACKUP_DIR/systemd"
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mkdir -p "$CURRENT_BACKUP_DIR/packages"
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echo "Starting host configuration backup ($TIMESTAMP)..."
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# ==============================================================================
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# Task 1: Backup System Mounts (/etc/fstab)
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# ==============================================================================
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if [ -f "$FSTAB_SOURCE" ]; then
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rsync -a "$FSTAB_SOURCE" "$CURRENT_BACKUP_DIR/os/"
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echo "Backed up: $FSTAB_SOURCE"
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else
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echo "Warning: Source file '$FSTAB_SOURCE' not found." >&2
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fi
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# ==============================================================================
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# Task 2: Backup DDNS Configurations (ddclient)
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# ==============================================================================
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if [ -f "$DDCLIENT_CONF_SOURCE" ]; then
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rsync -a "$DDCLIENT_CONF_SOURCE" "$CURRENT_BACKUP_DIR/services/ddclient/"
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echo "Backed up: $DDCLIENT_CONF_SOURCE"
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else
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echo "Warning: Source file '$DDCLIENT_CONF_SOURCE' not found." >&2
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fi
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if [ -f "$DDCLIENT_DEFAULT_SOURCE" ]; then
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rsync -a "$DDCLIENT_DEFAULT_SOURCE" "$CURRENT_BACKUP_DIR/services/ddclient/"
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echo "Backed up: $DDCLIENT_DEFAULT_SOURCE"
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else
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echo "Warning: Source file '$DDCLIENT_DEFAULT_SOURCE' not found." >&2
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fi
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# ==============================================================================
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# Task 3: Export Cron Configurations
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# ==============================================================================
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# Export active user/root crontab
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if crontab -l > /dev/null 2>&1; then
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crontab -l > "$CURRENT_BACKUP_DIR/cron/root_crontab.txt"
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echo "Exported: Root crontab"
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fi
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# Backup system-wide cron configuration files
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if [ -f "/etc/crontab" ]; then
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rsync -a /etc/crontab "$CURRENT_BACKUP_DIR/cron/crontab_system"
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fi
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if [ -d "/etc/cron.d" ]; then
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rsync -aL /etc/cron.d "$CURRENT_BACKUP_DIR/cron/"
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echo "Backed up: /etc/cron.d directory"
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fi
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# ==============================================================================
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# Task 4: Backup Custom Systemd Units & Services
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# ==============================================================================
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if [ -d "$SYSTEMD_SOURCE" ]; then
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rsync -aL "$SYSTEMD_SOURCE/" "$CURRENT_BACKUP_DIR/systemd/"
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echo "Backed up: $SYSTEMD_SOURCE"
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else
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echo "Warning: Systemd directory '$SYSTEMD_SOURCE' not found." >&2
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fi
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# ==============================================================================
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# Task 5: Export Installed System Package Recovery Lists
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# ==============================================================================
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if command -v dpkg > /dev/null 2>&1; then
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dpkg --get-selections > "$CURRENT_BACKUP_DIR/packages/dpkg_selections.txt"
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echo "Exported: dpkg package selections"
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fi
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if command -v apt-mark > /dev/null 2>&1; then
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apt-mark showmanual > "$CURRENT_BACKUP_DIR/packages/apt_manual_packages.txt"
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echo "Exported: Manually installed apt package list"
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fi
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# ==============================================================================
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# Task 6: Record Latest Pointer & Prune Old Backups
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# ==============================================================================
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echo "$CURRENT_BACKUP_DIR" > "$LATEST_TXT_FILE"
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echo "Checking for backups older than $RETENTION_DAYS days..."
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find "$HOST_BACKUP_BASE" -maxdepth 1 -type d -name "backup_*" -mtime +$RETENTION_DAYS -exec rm -rf {} +
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# ==============================================================================
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# Completion and Notification
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# ==============================================================================
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echo "Success: Host backup completed at '$CURRENT_BACKUP_DIR'."
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curl -H "Authorization: Bearer $NTFY_TOKEN" -d "Success: Host backup completed ($TIMESTAMP). Retaining $RETENTION_DAYS days." "$NTFY_SERVER/$NTFY_TOPIC" > /dev/null 2>&1 |