Quick and dirty Docker Volume backup/export and restore/import scripts

export-volumes.sh

#!/bin/bash

# Check if backup directory is provided
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <backup_directory>"
    exit 1
fi

backup_dir=$1

# Get a list of all local docker volumes
volumes=$(docker volume ls -q)

# Loop through each volume and export it to a .tar.gz file
for volume in $volumes; do
    # Create a temporary container to mount the volume and export the data
    docker run --rm -v $volume:/data -v $backup_dir:/backup alpine tar czf /backup/$volume.tar.gz /data
done

import-volumes.sh

#!/bin/bash

# Check if backup directory is provided
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <backup_directory>"
    exit 1
fi

backup_dir=$1

# Get a list of all .tar.gz files in the backup directory
files=$(ls $backup_dir/*.tar.gz)

# Loop through each file and create or update a docker volume
for file in $files; do
    # Get the volume name from the file name
    volume=$(basename $file .tar.gz)
    # Check if the volume already exists
    if docker volume ls -q | grep -q "^$volume\$"; then
        # Volume exists, update it with the data from the .tar.gz file
        docker run --rm -v $volume:/data -v $backup_dir:/backup alpine sh -c "tar xzf /backup/$volume.tar.gz --strip-components=1 -C /data"
    else
        # Volume does not exist, create it and populate it with the data from the .tar.gz file
        docker volume create $volume
        docker run --rm -v $volume:/data -v $backup_dir:/backup alpine sh -c "tar xzf /backup/$volume.tar.gz --strip-components=1 -C /data"
    fi
done