容器之间绑定数据卷

容器之间绑定数据卷

 docker run -it --name centos02 --volumes-from centos01 镜像ID

[root@iZbp1htnoa70qlle394f3wZ /]# docker images
REPOSITORY            TAG       IMAGE ID       CREATED         SIZE
luoking/centos        1.0       4d030b2b738b   17 hours ago    231MB
nginx                 latest    605c77e624dd   3 months ago    141MB
tomcat                9.0       b8e65a4d736d   4 months ago    680MB
mysql                 5.7       c20987f18b13   4 months ago    448MB
centos                latest    5d0da3dc9764   7 months ago    231MB
portainer/portainer   latest    580c0e4e98b0   13 months ago   79.1MB
[root@iZbp1htnoa70qlle394f3wZ /]# docker run -it --name centos01 4d030b2b738b
[root@d95c9aa03171 /]# ls
bin  etc   lib	  lost+found  mnt  proc  run   srv  tmp  var	   volume02
dev  home  lib64  media       opt  root  sbin  sys  usr  volume01
[root@d95c9aa03171 /]# cd volume01
[root@d95c9aa03171 volume01]# ls      #查看volume01目录，什么也没有
[root@d95c9aa03171 volume01]# exit
exit
[root@iZbp1htnoa70qlle394f3wZ /]# docker run -it --name centos02 --volumes-from centos01 4d030b2b738b
[root@a20d9280fe54 /]# ls
bin  etc   lib	  lost+found  mnt  proc  run   srv  tmp  var	   volume02
dev  home  lib64  media       opt  root  sbin  sys  usr  volume01
[root@a20d9280fe54 /]# cd volume01
[root@a20d9280fe54 volume01]# touch luoking.java    #在centos02的volume01中创建luoking.java
[root@a20d9280fe54 volume01]# ls
luoking.java
[root@a20d9280fe54 volume01]# [root@iZbp1htnoa70qlle394f3wZ /]# 
[root@iZbp1htnoa70qlle394f3wZ /]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS     NAMES
a20d9280fe54   4d030b2b738b   "/bin/sh -c /bin/bash"   42 seconds ago   Up 42 seconds             centos02
[root@iZbp1htnoa70qlle394f3wZ /]# docker ps -a
CONTAINER ID   IMAGE          COMMAND                  CREATED              STATUS                       PORTS     NAMES
a20d9280fe54   4d030b2b738b   "/bin/sh -c /bin/bash"   About a minute ago   Up About a minute                      centos02
d95c9aa03171   4d030b2b738b   "/bin/sh -c /bin/bash"   4 minutes ago        Exited (127) 3 minutes ago             centos01
[root@iZbp1htnoa70qlle394f3wZ /]# docker start  d95c9aa03171  #启动容器01
d95c9aa03171
[root@iZbp1htnoa70qlle394f3wZ /]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS          PORTS     NAMES
a20d9280fe54   4d030b2b738b   "/bin/sh -c /bin/bash"   3 minutes ago   Up 3 minutes              centos02
d95c9aa03171   4d030b2b738b   "/bin/sh -c /bin/bash"   6 minutes ago   Up 40 seconds             centos01
[root@iZbp1htnoa70qlle394f3wZ /]# docker exec -it d95c9aa03171 /bin/bash
[root@d95c9aa03171 /]# cd /volume01
[root@d95c9aa03171 volume01]# ls      #发现数据已经同步
luoking.java

查看两个容器关于数据卷的数据

[root@iZbp1htnoa70qlle394f3wZ /]# docker inspect d95c9aa03171   #centos01的元数据
[
        "Mounts": [
            {
                "Type": "volume",
                "Name": "ced190e625bd248c4b8a6e95805510145bb0544970f7d1101e823502a4407b74",
                "Source": "/var/lib/docker/volumes/ced190e625bd248c4b8a6e95805510145bb0544970f7d1101e823502a4407b74/_data",
                "Destination": "volume01",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            },
            {
                "Type": "volume",
                "Name": "42c76f243df32d5988999dc64ed000295a74d3758c6d5efb06ae30e3aef2075d",
                "Source": "/var/lib/docker/volumes/42c76f243df32d5988999dc64ed000295a74d3758c6d5efb06ae30e3aef2075d/_data",
                "Destination": "volume02",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            }
        ],
]

[root@iZbp1htnoa70qlle394f3wZ /]# docker inspect a20d9280fe54  #容器centos02的元数据
[
        "Mounts": [
            {
                "Type": "volume",
                "Name": "ced190e625bd248c4b8a6e95805510145bb0544970f7d1101e823502a4407b74",
                "Source": "/var/lib/docker/volumes/ced190e625bd248c4b8a6e95805510145bb0544970f7d1101e823502a4407b74/_data",
                "Destination": "volume01",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            },
            {
                "Type": "volume",
                "Name": "42c76f243df32d5988999dc64ed000295a74d3758c6d5efb06ae30e3aef2075d",
                "Source": "/var/lib/docker/volumes/42c76f243df32d5988999dc64ed000295a74d3758c6d5efb06ae30e3aef2075d/_data",
                "Destination": "volume02",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            }
        ],
]

发现他们两个数据卷指向本地的同一个文件，他们的数据也就同步到了本地