docker数据备份和还原

1. 创建nginx容器
   docker run -it --name nginx  -p 80  -v /usr/share/nginx/html -d  nginx:latest
   
2. 生产数据
   docker exec -it nginx bash
   cd /usr/share/nginx/html/
   echo `date` >index.html
   echo `date` >kubilai.txt
   
   
3. 备份
   docker run --rm --volumes-from nginx -v $(pwd):/backup nginx:latest bash -c  "cd /usr/share/nginx && tar cvf /backup/nginx-data.tar html"
   
4. 模拟数据丢失
   docker rm -f nginx 
   docker volume rm $(docker volume ls -q)
   
5. 还原
   docker run -it --name nginx  -p 80  -v /usr/share/nginx/html -d  nginx:latest
   docker run --rm --volumes-from nginx -v $(pwd):/backup nginx:latest bash -c "cd /usr/share/nginx && tar xvf /backup/nginx-data.tar"
   
6. 验证