Docker学习笔记（二） volume介绍和操作
volume介绍和操作
一.volume 介绍
提供独立于容器之外的持久化存储，比如说运行一个数据库容器，数据库里面的数据就是需要被持久化的，volume就可以做到这个功能实现，并且还能共享容器与容器之间的数据。
二.volume 操作
方式一，以默认的目录挂载到指定的容器 目录中
docker run -d --name nginx -v /usr/share/nginx/html nginx
docker inspect nginx 查看所有的容器
-
},
-
"Mounts": [
-
{
-
"Type": "volume",
-
"Name": "daad412457c85a5ee10504928d9d2d642e45d5deb571ae762aa1e25e45925674",
-
"Source": "/var/lib/docker/volumes/daad412457c85a5ee10504928d9d2d642e45d5deb571ae762aa1e25e45925674/_data",
-
"Destination": "/usr/share/nginx/html",
-
"Driver": "local",
-
"Mode": "",
-
"RW": true,
-
"Propagation": ""
-
}
-
],
-
"Config": {
-
"Hostname": "46e50083988e",
-
"Domainname": "",
-
"User": "",
-
"AttachStdin": false,
-
"AttachStdout": false,
-
"AttachStderr": false,
-
"ExposedPorts": {
-
"80/tcp": {}
-
},
-
"Tty": false,
-
"OpenStdin": false,
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"StdinOnce": false,
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"Env": [
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"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
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"NGINX_VERSION=1.15.2-1~stretch",
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"NJS_VERSION=1.15.2.0.2.2-1~stretch"
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],
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"Cmd": [
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"nginx",
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"-g",
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"daemon off;"
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],
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"ArgsEscaped": true,
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"Image": "nginx",
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"Volumes": {
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"/usr/share/nginx/html": {}
-
},
-
"WorkingDir": "",
-
"Entrypoint": null,
-
"OnBuild": null,
-
"Labels": {
-
"maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
-
},
-
"StopSignal": "SIGTERM"
-
},
-
"NetworkSettings": {
-
"Bridge": "",
-
"SandboxID": "d23f93abdf77ecdd101c7c8ed63bf4b21c08aaee28120c53493fb30363ef2c06",
-
"HairpinMode": false,
-
"LinkLocalIPv6Address": "",
-
"LinkLocalIPv6PrefixLen": 0,
-
"Ports": null,
-
"SandboxKey": "/var/run/docker/netns/d23f93abdf77",
-
"SecondaryIPAddresses": null,
-
"SecondaryIPv6Addresses": null,
-
"EndpointID": "",
-
"Gateway": "",
-
"GlobalIPv6Address": "",
-
"GlobalIPv6PrefixLen": 0,
-
"IPAddress": "",
-
"IPPrefixLen": 0,
-
"IPv6Gateway": "",
-
"MacAddress": "",
-
"Networks": {
-
"bridge": {
-
"IPAMConfig": null,
-
"Links": null,
-
"Aliases": null,
-
"NetworkID": "e9a5c3a2efc45030b88a90fcf3db7d3e22282a98ba2862a00992db2b1a2cc82f",
-
"EndpointID": "",
-
"Gateway": "",
-
"IPAddress": "",
-
"IPPrefixLen": 0,
-
"IPv6Gateway": "",
-
"GlobalIPv6Address": "",
-
"GlobalIPv6PrefixLen": 0,
-
"MacAddress": ""
-
}
-
}
-
}
-
}
-
]
"Source": "/var/lib/docker/volumes/daad412457c85a5ee10504928d9d2d642e45d5deb571ae762aa1e25e45925674/_data",
"Destination": "/usr/share/nginx/html",
重点为此处，将本地的source 对应的目录挂载到 nginx 的访问页面目录 。
docker exec -it nginx /bin/bash 进入容器内部
方式二.将指定的当前目录的html目录挂载到指定的容器中
docker run -p 80:80 -d -v $PWD/html:/usr/share/nginx/html nginx 将当前目录下的html目录挂载到容器里面的/usr/share/nginx/html 目录
curl http://localhost: 输出的内容即为当前目录下的html目录中的index.html文件的内容
docker create -v $PWD/data:/var/mydata --name data_container ubuntu 、
将data_container 容器的/var/mydata 挂载到 ubuntu 容器里面
docker run -it --volumes-from data_container ubuntu /bin/bash
进入到Ubuntu容器里面 ，
mount 命令 查看所有挂载
发现 已经把 data_container 的/var/mydata挂载上来了
cd /var/mydata
touch whatever.txt
ctrl+d 或者 exit 退出当前容器
cd data 发现本地的目录中也创建 了一个 whatever.txt文件
多个容器之间可以互相挂载，以便做到数据共享。
文章来源: blog.csdn.net，作者：血煞风雨城2018，版权归原作者所有，如需转载，请联系作者。
原文链接：blog.csdn.net/qq_31905135/article/details/81394405
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