# docker 初探02 数据共享和删除docker

xiaoxiao2021-03-25 93

删除容器和容器中数据

删除镜像

#查看进程 [root@#localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 81a879a36bd3 wordpress "docker-entrypoint..." About an hour ago Up About an hour 0.0.0.0:80->80/tcp wordpress a57a3cc492b7 mysql "docker-entrypoint..." About an hour ago Up About an hour 3306/tcp mysqlwp fe9a249e1bd2 busybox "echo hello world" 2 hours ago Exited (0) 2 hours ago adoring_mclean [root@#localhost ~]# docker stop fe9a249e1bd2 fe9a249e1bd2 [root@#localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE mysql latest 9546ca122d3a 4 days ago 407 MB wordpress latest 4ad41adc2794 12 days ago 401 MB busybox latest 00f017a8c2a6 3 weeks ago 1.11 MB daocloud.io/library/nginx 1.7.1 e3e043d3ed2f 2 years ago 499 MB [root@#localhost ~]# docker rmi 00f017a8c2a6 Error response from daemon: conflict: unable to delete 00f017a8c2a6 (must be forced) - image is being used by stopped container fe9a249e1bd2 [root@#localhost ~]# docker rmi --help Usage: docker rmi [OPTIONS] IMAGE [IMAGE...] Remove one or more images Options: -f, --force Force removal of the image --help Print usage --no-prune Do not delete untagged parents [root@#localhost ~]# docker rmi -f 00f017a8c2a6 Untagged: busybox:latest Untagged: busybox@sha256:32f093055929dbc23dec4d03e09dfe971f5973a9ca5cf059cbfb644c206aa83f Deleted: sha256:00f017a8c2a6e1fe2ffd05c281f27d069d2a99323a8cd514dd35f228ba26d2ff [root@#localhost ~]#

删除容器和数据

docker stop $(docker ps -a) docker rm -v $(docker pa -aq )

在宿主机和容器之间共享数据

[root@#localhost ~]# docker run -ti -v "$PWD":/data_share ubuntu:14.04 /bin/bash Unable to find image 'ubuntu:14.04' locally 14.04: Pulling from library/ubuntu 30d541b48fc0: Pull complete 8ecd7f80d390: Pull complete 46ec9927bb81: Pull complete 2e67a4d67b44: Pull complete 7d9dd9155488: Pull complete Digest: sha256:62a5dce5ceccd7f1cb2672a571ebee52cad1f08eec9b57fe4965fb0968a9602e Status: Downloaded newer image for ubuntu:14.04 root@75ee0b5c4a04:/# ls bin boot data_share dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@75ee0b5c4a04:/# ll total 24 drwxr-xr-x. 1 root root 60 Apr 4 08:10 ./ drwxr-xr-x. 1 root root 60 Apr 4 08:10 ../ -rwxr-xr-x. 1 root root 0 Apr 4 08:10 .dockerenv* drwxr-xr-x. 2 root root 4096 Apr 4 08:10 bin/ drwxr-xr-x. 2 root root 6 Apr 10 2014 boot/ dr-xr-x---. 4 root root 4096 Apr 4 08:07 data_share/ drwxr-xr-x. 5 root root 360 Apr 4 08:10 dev/ drwxr-xr-x. 1 root root 62 Apr 4 08:10 etc/ drwxr-xr-x. 2 root root 6 Apr 10 2014 home/ drwxr-xr-x. 12 root root 4096 Apr 4 08:10 lib/ drwxr-xr-x. 2 root root 33 Apr 4 08:10 lib64/ drwxr-xr-x. 2 root root 6 Feb 14 23:28 media/ drwxr-xr-x. 2 root root 6 Apr 10 2014 mnt/ drwxr-xr-x. 2 root root 6 Feb 14 23:28 opt/ dr-xr-xr-x. 153 root root 0 Apr 4 08:10 proc/ drwx------. 2 root root 35 Apr 4 08:10 root/ drwxr-xr-x. 8 root root 4096 Feb 27 19:41 run/ drwxr-xr-x. 2 root root 4096 Apr 4 08:10 sbin/ drwxr-xr-x. 2 root root 6 Feb 14 23:28 srv/ dr-xr-xr-x. 13 root root 0 Apr 4 05:27 sys/ drwxrwxrwt. 2 root root 6 Feb 14 23:29 tmp/ drwxr-xr-x. 10 root root 97 Apr 4 08:10 usr/ drwxr-xr-x. 11 root root 4096 Apr 4 08:10 var/ root@75ee0b5c4a04:/# cd data_share/ root@75ee0b5c4a04:/data_share/data_share# echo hi>hi root@75ee0b5c4a04:/data_share/data_share# ll total 8 drwxr-xr-x. 2 root root 15 Apr 4 08:11 ./ dr-xr-x---. 4 root root 4096 Apr 4 08:07 ../ -rw-r--r--. 1 root root 3 Apr 4 08:11 hi root@75ee0b5c4a04:/data_share/data_share# more hi hi root@75ee0b5c4a04:/data_share/data_share# exit exit [root@#localhost ~]# ls anaconda-ks.cfg data_share wordpress.backup [root@#localhost ~]# cd data_share/ [root@#localhost data_share]# ls hi [root@#localhost data_share]# more hi hi [root@#localhost data_share]# #看看映射情况 [root@#localhost data_share]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 75ee0b5c4a04 ubuntu:14.04 "/bin/bash" 3 minutes ago Exited (0) 2 minutes ago ecstatic_shockley 81a879a36bd3 wordpress "docker-entrypoint..." About an hour ago Up About an hour 0.0.0.0:80->80/tcp wordpress a57a3cc492b7 mysql "docker-entrypoint..." About an hour ago Up About an hour 3306/tcp mysqlwp fe9a249e1bd2 00f017a8c2a6 "echo hello world" 2 hours ago Exited (0) 2 hours ago adoring_mclean [root@#localhost data_share]# docker inspect -f {{.Mounts}} 75ee0b5c4a04 [{bind /root /data_share true }] [root@#localhost data_share]#

容器之间共享数据

方法一：创建数据容器

#如果没有本地路径那么就是创建一个数据容器容器 [root@#localhost ~]# docker run -ti -v /data_share ubuntu:14.04 /bin/bash [root@#localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 7cd78727c2be ubuntu:14.04 "/bin/bash" About a minute ago Exited (0) 13 seconds ago admiring_dijkstra 75ee0b5c4a04 ubuntu:14.04 "/bin/bash" 16 minutes ago Exited (0) 14 minutes ago ecstatic_shockley 81a879a36bd3 wordpress "docker-entrypoint..." About an hour ago Up About an hour 0.0.0.0:80->80/tcp wordpress a57a3cc492b7 mysql "docker-entrypoint..." About an hour ago Up About an hour 3306/tcp mysqlwp fe9a249e1bd2 00f017a8c2a6 "echo hello world" 2 hours ago Exited (0) 2 hours ago adoring_mclean [root@#localhost ~]# docker inspect -f {{.Mounts}} 7cd78727c2be [{volume 2293be214b9b681555139bfe63d22529f9e88105c83b2f166682b02b74173069 /var/lib/docker/volumes/2293be214b9b681555139bfe63d22529f9e88105c83b2f166682b02b74173069/_data /data_share local true }] [root@#localhost ~]# cd /var/lib/docker/volumes/ [root@#localhost volumes]# ll total 24 drwxr-xr-x. 3 root root 18 Apr 4 16:24 2293be214b9b681555139bfe63d22529f9e88105c83b2f166682b02b74173069 drwxr-xr-x. 3 root root 18 Apr 4 14:37 5a7d51b66fc04f38c2e54a1172716f10105cb58fe9738e406a2c1c820aed2e32 drwxr-xr-x. 3 root root 18 Apr 4 14:40 decae6a9061941110ee53691f3a89c5b9c8b67b822ff8d4d3ed94a076990ce4d -rw-------. 1 root root 32768 Apr 4 16:24 metadata.db [root@#localhost volumes]# cd 2293be214b9b681555139bfe63d22529f9e88105c83b2f166682b02b74173069/ [root@#localhost 2293be214b9b681555139bfe63d22529f9e88105c83b2f166682b02b74173069]# ll total 0 drwxr-xr-x. 2 root root 16 Apr 4 16:25 _data [root@#localhost 2293be214b9b681555139bfe63d22529f9e88105c83b2f166682b02b74173069]# cd _data/ [root@#localhost _data]# ll total 4 -rw-r--r--. 1 root root 4 Apr 4 16:25 hi2 [root@#localhost _data]# #在主机上修改这个文件也会同步到容器中。 #思路：先创建一个数据容器，然后再创建数据容器的时候将这个容器通过 --volumes-from 挂载其中的卷 [root@#localhost _data]# docker run -v /data_share --name data ubuntu:14.04 [root@#localhost _data]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b7e6b0c36a81 ubuntu:14.04 "/bin/bash" 18 seconds ago Exited (0) 17 seconds ago data 7cd78727c2be ubuntu:14.04 "/bin/bash" 12 minutes ago Exited (0) 11 minutes ago admiring_dijkstra 75ee0b5c4a04 ubuntu:14.04 "/bin/bash" 27 minutes ago Exited (0) 25 minutes ago ecstatic_shockley 81a879a36bd3 wordpress "docker-entrypoint..." About an hour ago Up About an hour 0.0.0.0:80->80/tcp wordpress a57a3cc492b7 mysql "docker-entrypoint..." About an hour ago Up About an hour 3306/tcp mysqlwp fe9a249e1bd2 00f017a8c2a6 "echo hello world" 2 hours ago Exited (0) 2 hours ago adoring_mclean [root@#localhost _data]# docker inspect -f {{.Mounts}} data [{volume 23319deb05dd455dfdedcd73078e5d341a7637f0dc3fbb6e5d3b5bcf5c5fc776 /var/lib/docker/volumes/23319deb05dd455dfdedcd73078e5d341a7637f0dc3fbb6e5d3b5bcf5c5fc776/_data /data_share local true }] [root@#localhost _data]# docker run -ti --volumes-from data ubuntu:14.04 /bin/bash root@8e0fa83c1235:/# ls bin boot data_share dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@8e0fa83c1235:/# cd data_share/ root@8e0fa83c1235:/data_share# ls root@8e0fa83c1235:/data_share# ls root@8e0fa83c1235:/data_share# echo h3>hi3 root@8e0fa83c1235:/data_share# exit exit [root@#localhost _data]# cd /var/lib/docker/volumes/23319deb05dd455dfdedcd73078e5d341a7637f0dc3fbb6e5d3b5bcf5c5fc776/_data /data_share [root@#localhost _data]# ll total 4 -rw-r--r--. 1 root root 3 Apr 4 16:39 hi3 [root@#localhost _data]# more hi3 h3 [root@#localhost _data]#

方法二：通过宿主机中转进行复制

#启动一个容器 [root@#localhost _data]# docker run -d --name testcopy ubuntu:14.04 sleep 360 dc8a6754400fda6423014b7791bb97060fd3c889cdd60e506d41983d6a189164 [root@#localhost _data]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES dc8a6754400f ubuntu:14.04 "sleep 360" 5 seconds ago Up 3 seconds testcopy 81a879a36bd3 wordpress "docker-entrypoint..." 2 hours ago Up 2 hours 0.0.0.0:80->80/tcp wordpress a57a3cc492b7 mysql "docker-entrypoint..." 2 hours ago Up 2 hours 3306/tcp mysqlwp #进入这个容器，创建一个文件 [root@#localhost _data]# docker exec -ti testcopy /bin/bash root@dc8a6754400f:/# root@dc8a6754400f:/# root@dc8a6754400f:/# pwd / root@dc8a6754400f:/# ls bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@dc8a6754400f:/# echo copy_test > copy_test.txt root@dc8a6754400f:/# exit exit #将这个文件拷贝到宿主机上 [root@#localhost _data]# docker cp testcopy:/copy_test.txt . [root@#localhost _data]# ll total 8 -rw-r--r--. 1 root root 10 Apr 4 16:46 copy_test.txt -rw-r--r--. 1 root root 3 Apr 4 16:39 hi3 [root@#localhost _data]# more copy_test.txt copy_test [root@#localhost _data]#

将文件从宿舍机拷贝到容器中

[root@#localhost _data]# docker run -d --name testcopy ubuntu:14.04 sleep 360 88df78f77c4eb164f978aa38ce7513513c6db02d7e59ee787b839f964b6b651d [root@#localhost _data]# docker exec -ti testcopy /bin/bash root@88df78f77c4e:/# ls bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@88df78f77c4e:/# pwd / root@88df78f77c4e:/# ls bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@88df78f77c4e:/# exit exit [root@#localhost _data]# docker cp host.txt testcopy:/ [root@#localhost _data]# docker exec -ti testcopy /bin/bash root@88df78f77c4e:/# ll total 24 drwxr-xr-x. 1 root root 69 Apr 4 08:53 ./ drwxr-xr-x. 1 root root 69 Apr 4 08:53 ../ -rwxr-xr-x. 1 root root 0 Apr 4 08:52 .dockerenv* drwxr-xr-x. 2 root root 4096 Apr 4 08:10 bin/ drwxr-xr-x. 2 root root 6 Apr 10 2014 boot/ drwxr-xr-x. 5 root root 340 Apr 4 08:52 dev/ drwxr-xr-x. 1 root root 62 Apr 4 08:52 etc/ drwxr-xr-x. 2 root root 6 Apr 10 2014 home/ -rw-r--r--. 1 root root 23 Apr 4 08:50 host.txt drwxr-xr-x. 12 root root 4096 Apr 4 08:10 lib/ drwxr-xr-x. 2 root root 33 Apr 4 08:10 lib64/ drwxr-xr-x. 2 root root 6 Feb 14 23:28 media/ drwxr-xr-x. 2 root root 6 Apr 10 2014 mnt/ drwxr-xr-x. 2 root root 6 Feb 14 23:28 opt/ dr-xr-xr-x. 150 root root 0 Apr 4 08:52 proc/ drwx------. 1 root root 26 Apr 4 08:53 root/ drwxr-xr-x. 8 root root 4096 Feb 27 19:41 run/ drwxr-xr-x. 2 root root 4096 Apr 4 08:10 sbin/ drwxr-xr-x. 2 root root 6 Feb 14 23:28 srv/ dr-xr-xr-x. 13 root root 0 Apr 4 05:27 sys/ drwxrwxrwt. 2 root root 6 Feb 14 23:29 tmp/ drwxr-xr-x. 10 root root 97 Apr 4 08:10 usr/ drwxr-xr-x. 11 root root 4096 Apr 4 08:10 var/ root@88df78f77c4e:/#

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