Backup and Restore Docker Volume Data

#!/bin/bash

#!/bin/bash
# Usage: backup-docker-volume.sh <Volume Name> [Backup File Name]
# Example 1: ./backup-docker-volume.sh n8n_n8n_data n8n_data_backup
# Example 2: ./backup-docker-volume.sh n8n_n8n_data

# Use this command to find the name of the volume:
# docker inspect --format '{{ json .Mounts }}' <container_name_or_id>


# 1. Capture the volume name
VOLUME_NAME=$1

# 2. Check if the second argument ($2) is provided.
# If not, default to "n8n_backup_" + current timestamp.
TIMESTAMP=$(date +"%Y_%m_%d_%H_%M_%S")
BACKUP_NAME=${2:-"n8n_backup_$TIMESTAMP"}

# 3. Run the backup
docker run --rm \
  -v "$VOLUME_NAME":/source:ro \
  -v "$(pwd)":/backup \
  alpine tar czf /backup/"$BACKUP_NAME".tar.gz -C /source .

echo "Backup completed: ${BACKUP_NAME}.tar.gz"

#!/bin/bash
# Usage: ./restore.sh <Volume Name> <Backup File Path>

VOLUME_NAME=$1
BACKUP_FILE=$2

# 1. Validation
if [ -z "$VOLUME_NAME" ] || [ -z "$BACKUP_FILE" ]; then
    echo "Usage: $0 <volume_name> <backup_file_path>"
    exit 1
fi

if [ ! -f "$BACKUP_FILE" ]; then
    echo "Error: Backup file $BACKUP_FILE not found."
    exit 1
fi

# 2. Create Rollback (Safety First)
echo "Creating safety rollback..."
TIMESTAMP=$(date +"%Y%m%d_%H%M%S")
docker run --rm -v "$VOLUME_NAME":/source:ro -v "$(pwd)":/backup \
  alpine tar czf /backup/rollback_before_restore_$TIMESTAMP.tar.gz -C /source .

# 3. Wipe the volume and Extract the backup in one step
# We mount the current directory to /backup so the container can see the .tar.gz
echo "Restoring data to volume: $VOLUME_NAME..."
docker run --rm \
  -v "$VOLUME_NAME":/dest \
  -v "$(pwd)":/backup \
  alpine sh -c "rm -rf /dest/* && tar xzf /backup/$(basename "$BACKUP_FILE") -C /dest"

if [ $? -eq 0 ]; then
    echo "Restore successful!"
else
    echo "Restore failed!"
    exit 1
fi