94 lines
3.7 KiB
Bash
94 lines
3.7 KiB
Bash
#!/bin/bash
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# backup.sh: The pure executor script called by cron.
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# Exit immediately if a command exits with a non-zero status.
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set -e
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# --- Notification & Error Handling ---
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# Generic function to send a notification to the webhook URL.
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# It accepts two arguments: status ("success" or "failure") and a message.
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send_notification() {
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local status=$1
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local message=$2
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if [ -n "$N8N_WEBHOOK_URL" ]; then
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echo "$(date): --> Sending ${status} notification to n8n..."
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# Send a POST request with a dynamic JSON payload
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curl -X POST \
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-H "Content-Type: application/json" \
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-d "{\"hostname\": \"${HOSTNAME}\", \"status\": \"${status}\", \"message\": \"${message}\"}" \
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"${N8N_WEBHOOK_URL}" \
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--silent --output /dev/null || echo "$(date): WARNING: Failed to send notification to n8n."
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fi
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}
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# Set the trap: if any command fails (ERR), call the notification function with a failure status.
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trap 'send_notification "failure" "Backup script failed at line $LINENO. Check container logs for details."' ERR
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# --- Optional Random Delay ---
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# If RANDOM_DELAY_SECONDS is set, sleep for a random duration up to its value
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# to prevent a "thundering herd" of backups from multiple hosts.
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if [ -n "$RANDOM_DELAY_SECONDS" ] && [ "$RANDOM_DELAY_SECONDS" -gt 0 ]; then
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# Sanitize the variable to ensure it's a number
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DELAY=${RANDOM_DELAY_SECONDS//\"/}
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SLEEP_TIME=$((RANDOM % DELAY))
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echo "$(date): Starting random delay of ${SLEEP_TIME}s (max ${DELAY}s)..."
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sleep ${SLEEP_TIME}
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fi
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# ----------------------------------------------------
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# 1. VALIDATION (Ensure Executor Variables Are Set)
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# ----------------------------------------------------
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# Validate required variables (though RUSTIC_REPOSITORY/PASSWORD are implicitly checked by Rustic)
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if [ -z "$BACKUP_PATHS" ]; then
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echo "ERROR: BACKUP_PATHS environment variable is not set. Exiting executor."
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exit 1
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fi
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# ----------------------------------------------------
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# 2. INITIALIZATION (Check and Initialize Repository)
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# ----------------------------------------------------
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echo "$(date): --> Checking if repository is initialized..."
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# A more reliable way to check for an initialized repo is to try reading its config.
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# If this command fails, the repository does not exist yet and must be initialized.
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if ! rustic cat config > /dev/null 2>&1; then
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echo "$(date): Repository not initialized. Attempting to initialize..."
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rustic init
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fi
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# ----------------------------------------------------
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# 3. RUN THE BACKUP (Backup)
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# ----------------------------------------------------
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# Validate that backup paths exist before running the backup
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for path in $BACKUP_PATHS; do
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if [ ! -e "$path" ]; then
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echo "$(date): !!! ERROR: Backup source path does not exist: $path !!!"
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echo "$(date): Please check your volume mounts and the BACKUP_PATHS variable."
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exit 1
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fi
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done
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echo "$(date): --> Starting backup process for paths: ${BACKUP_PATHS}"
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rustic backup ${BACKUP_PATHS}
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STATUS=$?
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if [ $STATUS -ne 0 ]; then
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echo "$(date): !!! BACKUP FAILED (exit code $STATUS) !!!"
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exit 1
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fi
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echo "$(date): Backup successfully completed."
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# --- Optional Cache Cleanup ---
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if [ -n "$CACHE_CLEANUP_DAYS" ] && [ "$CACHE_CLEANUP_DAYS" -gt 0 ]; then
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echo "$(date): --> Running cache cleanup..."
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/usr/local/bin/cache-cleanup.sh
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fi
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echo "$(date): --- ALL BACKUP TASKS COMPLETED SUCCESSFULLY. ---"
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# ----------------------------------------------------
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# 4. SEND SUCCESS NOTIFICATION
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# ----------------------------------------------------
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# The trap above handles failures, so if we reach this point, the backup was successful.
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send_notification "success" "Rustic backup completed successfully." |