docker run --rm \
  -v <volume_name>:/source \
  -v $(pwd):/backup \
  alpine \
  tar czf /backup/backup.tar.gz -C /source .

# 導出到當前目錄
docker run --rm \
  -v postgres_data:/source \
  -v $(pwd):/backup \
  alpine \
  tar czf /backup/postgres_backup_$(date +%Y%m%d_%H%M%S).tar.gz -C /source .

# 1. 查看容器和掛載信息
docker ps
docker inspect <container_name> | grep -A 10 Mounts

# 2. 復制數(shù)據(jù)
docker cp <container_id>:/var/lib/mysql ./mysql_backup

# 3. 對于運行中的數(shù)據(jù)庫，建議先執(zhí)行flush
docker exec <container_id> mysqldump --all-databases > backup.sql

# 1. 創(chuàng)建備份容器（不啟動）
docker create \
  -v myapp_data:/data \
  --name backup_container \
  alpine

# 2. 從容器復制數(shù)據(jù)
docker cp backup_container:/data ./backup_$(date +%Y%m%d)

# 3. 清理容器
docker rm backup_container

#!/bin/bash
VOLUME_NAME="myapp_data"
BACKUP_DIR="/backups"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)

# 創(chuàng)建備份目錄
mkdir -p ${BACKUP_DIR}

# 執(zhí)行備份
docker run --rm \
  -v ${VOLUME_NAME}:/source:ro \
  -v ${BACKUP_DIR}:/backup \
  alpine \
  sh -c "cd /source && tar czf /backup/backup_${TIMESTAMP}.tar.gz ."

# 清理30天前的備份
find ${BACKUP_DIR} -name "backup_*.tar.gz" -mtime +30 -delete

echo "Backup completed: backup_${TIMESTAMP}.tar.gz"

# 查看volume詳細信息
docker volume inspect myapp_data

# 輸出示例：
# "Mountpoint": "/var/lib/docker/volumes/myapp_data/_data"

# 直接復制（需要root權限）
sudo cp -r /var/lib/docker/volumes/myapp_data/_data ./local_backup
sudo tar czf volume_backup.tar.gz /var/lib/docker/volumes/myapp_data/_data

version: '3.8'

services:
  app:
    image: myapp:latest
    volumes:
      - app_data:/data
  
  backup:
    image: alpine
    volumes:
      - app_data:/source:ro
      - ./backups:/backup
    command: >
      sh -c "
        while true; do
          tar czf /backup/data_$$(date +%Y%m%d_%H%M%S).tar.gz -C /source .
          echo 'Backup completed at' $$(date)
          sleep 86400
        done
      "
    restart: unless-stopped

volumes:
  app_data:

# 運行備份服務
docker-compose run --rm backup

# 或者定義專門的備份命令
docker-compose exec backup sh -c \
  "tar czf /backup/manual_backup_$(date +%Y%m%d).tar.gz -C /source ."

# 恢復到新volume
docker volume create restored_data
docker run --rm \
  -v restored_data:/target \
  -v $(pwd):/backup \
  alpine \
  tar xzf /backup/backup.tar.gz -C /target

# 驗證恢復
docker run --rm -v restored_data:/data alpine ls -la /data