Docker 入门笔记 - Docker 容器数据卷

是什么？能干嘛？

• 容器的持久化和同步操作
• 容器间继承、共享数据，容器中产生的数据同步到本地
• 目录挂载，容器的目录，挂载到Linux上面

数据卷

• 命令

docker run -it -v 主机目录:容器目录:权限

ro readonly  #只读  
rw readwrite #可读可写

# 一旦设置了容器的权限，容器对我们挂载的内容就有限定了

• 直接命令添加

docker run -it -v /data/nginx/data:/data nginx  

• 只读权限

docker run -it -v /data/nginx/data:/data:ro nginx   

# 这种情况下/data 目录就只能从内部改变，不能从外部改变 

• Dockerfile添加

cat > Dockerfile <<EOF  
FROM centos  
VOLUME ["/data0","/data1"]  
CMD echo "finished,-----success"  
CMD /bin/bash  
EOF

 docker build -f /mydocker/Dockerfile -t leoiceo/centos:1.0 .

启动后默认会挂载容器卷

 "Mounts": [
            {
                "Type": "volume",
                "Name": "5f97720950c327cafb80cd87ab0531122cd1895e4662448a5a05377720ca59e2",
                "Source": "/var/lib/docker/volumes/5f97720950c327cafb80cd87ab0531122cd1895e4662448a5a05377720ca59e2/_data",
                "Destination": "/data0",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            },
            {
                "Type": "volume",
                "Name": "4667ae2597114426e41f98d8fda7104ee2d881236aa8423826df8f6956662b08",
                "Source": "/var/lib/docker/volumes/4667ae2597114426e41f98d8fda7104ee2d881236aa8423826df8f6956662b08/_data",
                "Destination": "/data1",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            }
        ],