docker-volume-backup.sh

#!/bin/bash

# 检查参数个数
if [ "$#" -lt 3 ]; then
    echo "Usage:"
    echo "./tool backup <volume> <output-file>"
    echo "./tool restore <input-file> <volume>"
    exit 1
fi

COMMAND=$1

# 检查 Docker 是否安装
if ! command -v docker &> /dev/null; then
    echo "Docker is not installed. Please install Docker first."
    exit 1
fi

case $COMMAND in
    backup)
        VOLUME=$2
        FILE=$3
        # 检查 Volume 是否存在
        if ! docker volume inspect "$VOLUME" &> /dev/null; then
            echo "Error: Volume '$VOLUME' does not exist."
            exit 1
        fi

        # 备份 Volume 到指定文件
        docker run --rm -v "${VOLUME}":/volume -v "$(pwd)":/backup busybox tar -czf "/backup/${FILE}" -C /volume .
        if [ $? -eq 0 ]; then
            echo "Backup successful. File saved as ${FILE}."
        else
            echo "Backup failed."
        fi
        ;;
    restore)
        VOLUME=$3
        FILE=$2
        # 检查备份文件是否存在
        if [ ! -f "$FILE" ]; then
            echo "Error: File '$FILE' does not exist."
            exit 1
        fi

        # 恢复备份到 Volume
        docker volume create "$VOLUME" > /dev/null
        docker run --rm -v "${VOLUME}":/volume -v "$(pwd)":/backup busybox tar -xzf "/backup/${FILE}" -C /volume
        if [ $? -eq 0 ]; then
            echo "Restore successful. Data restored to volume '${VOLUME}'."
        else
            echo "Restore failed."
        fi
        ;;
    *)
        echo "Invalid command. Use 'backup' or 'restore'."
        exit 1
        ;;
esac