一、掛載host volume到容器
1.1.指定掛載本地資源到容器
1.1.1.本地文件
# cat index.html There is nothing here
1.1.2.創建容器，掛載本地資源
# docker run -d -p 80:80 -v ~/index.html:/usr/share/nginx/html/index.html --name "cklng" nginx 83826f3fdb3d940fb2fd18af4223da695758e8ac7eb73e07215c461904e161cb
# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 83826f3fdb3d nginx "nginx -g 'daemon of…" 4 seconds ago Up 3 seconds 0.0.0.0:80->80/tcp cklng
1.1.3.訪問容器
# curl http://127.0.0.1:80
There is nothing here
# docker inspect 83826f3fdb3d
....
"Mounts": [
{
"Type": "bind",
"Source": "/root/index.html", #本地目錄文件
"Destination": "/usr/share/nginx/html/index.html", #容器目錄文件
"Mode": "",
"RW": true,
"Propagation": "rprivate"
}
],
....1.2.不指定本地資源掛載到容器
1.2.1.運行容器，不指定本地資源
# docker run -d -p 80:80 -v /usr/share/nginx/html/ --name "cklng1" nginx 8d8fc0a101a03bc7b098f0838e9583cf2a673ecbc6c543739cf2f2803bb713e3
1.2.2.訪問容器
# curl http://127.0.0.1:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>1.2.3.查看容器詳情
# docker inspect 8d8fc0a101a0
...
"Mounts": [
{
"Type": "volume",
"Name": "af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef",
"Source": "/var/lib/docker/volumes/af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef/_data", #主機資源路徑
"Destination": "/usr/share/nginx/html", #掛載到容器的目錄
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
],
....#ls /var/lib/docker/volumes/af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef/_data/ 50x.html index.html
#容器生產一個隨機目錄作爲mount的源
#查看mount源內容：
# cat /var/lib/docker/volumes/af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef/_data/index.html
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>1.2.3.查看volume詳情
# docker volume ls DRIVER VOLUME NAME local af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef
# docker volume inspect af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef
[
{
"CreatedAt": "2018-12-19T01:05:34-05:00",
"Driver": "local",
"Labels": null,
"Mountpoint": "/var/lib/docker/volumes/af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef/_data",
"Name": "af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef",
"Options": null,
"Scope": "local"
}
]修改volume內容：
# cat /var/lib/docker/volumes/af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef/_data/index.html THIS IS NO NO NO PANGE!
訪問容器：
# curl http://127.0.0.1:80 THIS IS NO NO NO PANGE!
進入容器查看：
# docker exec -it 8d8fc0a101a0 /bin/bash root@8d8fc0a101a0:/# cat /usr/share/nginx/html/index.html THIS IS NO NO NO PANGE!
1.2.4.容器停止後volume
# docker stop 8d8fc0a101a0 8d8fc0a101a0
# docker rm 8d8fc0a101a0 8d8fc0a101a0
# cat /var/lib/docker/volumes/af5af5d925c4e4109d5d9ab4ff9112bee5ec56b1dfc64ce1294e23ed458c50ef/_data/index.html THIS IS NO NO NO PANGE!
#host文件依然存在
使用-v 可以刪除本地掛載資源
# docker rm -v 71b9d9f74d2a
2.容器共享數據
2.1.如上共享，掛載本地的同一個volume
2.1.1.創建三個容器，掛載同一個目錄
# docker run -d -p 80 -v ~/index.html:/usr/share/nginx/html/index.html --name "cklng1" nginx 75cb89bb9430ed47022c76a854c64cdc043571d8be0215d7223355713fb9c078 [root@localhost ~]# docker run -d -p 80 -v ~/index.html:/usr/share/nginx/html/index.html --name "cklng2" nginx 4e8699f856f0709088b1e24effb9f38b939018f6af9880c1a988a2e42fb13c35 [root@localhost ~]# docker run -d -p 80 -v ~/index.html:/usr/share/nginx/html/index.html --name "cklng3" nginx 46c536bc8eeacb073f84cccef9c217edd8196e431b033f8c1182233aa02731df
容器進程：
# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 46c536bc8eea nginx "nginx -g 'daemon of…" 5 seconds ago Up 3 seconds 0.0.0.0:32771->80/tcp cklng3 4e8699f856f0 nginx "nginx -g 'daemon of…" 8 seconds ago Up 7 seconds 0.0.0.0:32770->80/tcp cklng2 75cb89bb9430 nginx "nginx -g 'daemon of…" 14 seconds ago Up 13 seconds 0.0.0.0:32769->80/tcp cklng1
訪問三個容器：
# curl http://127.0.0.1:32771 There is nothing here # curl http://127.0.0.1:32770 There is nothing here # curl http://127.0.0.1:32769 There is nothing here #結果一致
#修改源
# echo "it's changed" > index.html # curl http://127.0.0.1:32769 it's changed # curl http://127.0.0.1:32770 it's changed # curl http://127.0.0.1:32771 it's changed
2.2.創建一個volme容器
參數說明：
--volumes-from Mount volumes from the specified container(s) #掛載volume從指定的容器
2.2.1.先創建一個volume容器
# docker create --name ckl_data -v ~/index.html:/usr/share/nginx/html/index -v /data/ckl/testdir centos a1bb53fa787c470611e5ebd9fd06c399447f3fdf18442eba08ae1b745d63a70c
#查看創建容器volume詳情：
# docker inspect a1bb53fa787c
...
"Mounts": [
{
"Type": "bind",
"Source": "/root/index.html", #掛載源1
"Destination": "/usr/share/nginx/html/index", #掛載點1
"Mode": "",
"RW": true,
"Propagation": "rprivate"
},
{
"Type": "volume",
"Name": "e78b4894d0f13c2ab68d362728dd101dc3b3a55666dd5978a204f30731b4f9a6",
"Source": "/var/lib/docker/volumes/e78b4894d0f13c2ab68d362728dd101dc3b3a55666dd5978a204f30731b4f9a6/_data", #隨機掛載源2
"Destination": "/data/ckl/testdir", #掛載點2
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
],
....2.2.2.創建三個容器，指定需要掛載的容器
# docker run -d --name "cklcent1" --volumes-from ckl_data nginx 480ebd88ea200f23bb0f0ac336fc7183a81832bdfcd40ea02bc2902fd980ae3d # docker run -d --name "cklcent2" --volumes-from ckl_data nginx 9e4a4095722595dc196b5e39c10ee970067855970e69ef571ad0e2a118f461a2 # docker run -d --name "cklcent3" --volumes-from ckl_data nginx 0a58aea9bd47895d9cf8c000f9d1f604f14970c47b1cb72e5d0f2015568de3d1
2.2.3.查看容器內容：
# docker exec -it 0a58aea9bd47 /bin/bash -c "cat /usr/share/nginx/html/index && ls /data/ckl/testdir" it's changed # docker exec -it 9e4a40957225 /bin/bash -c "cat /usr/share/nginx/html/index && ls /data/ckl/testdir" it's changed # docker exec -it 480ebd88ea20 /bin/bash -c "cat /usr/share/nginx/html/index && ls /data/ckl/testdir" it's changed
進入掛載源，新增文件，測試：
# cd /var/lib/docker/volumes/e78b4894d0f13c2ab68d362728dd101dc3b3a55666dd5978a204f30731b4f9a6/_data [root@localhost _data]# touch ckl.log
#已經共享的目錄，文件一致
# docker exec -it 0a58aea9bd47 /bin/bash -c "cat /usr/share/nginx/html/index && ls /data/ckl/testdir" it's changed ckl.log # docker exec -it 9e4a40957225 /bin/bash -c "cat /usr/share/nginx/html/index && ls /data/ckl/testdir" it's changed ckl.log # docker exec -it 480ebd88ea20 /bin/bash -c "cat /usr/share/nginx/html/index && ls /data/ckl/testdir" it's changed ckl.log
#也可以製作一個容器掛載鏡像，文件放在容器裏，新創建的容器指定掛載容器，不依賴於主機。