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在Docker使用中，常常会碰到删除镜像不成功。反而让镜像变成了<none > <none>即，没名字，没Tag的镜像。

root@iZ28ikebrg6Z:/var/run# docker images

REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE

<none>                 <none>              def2e0b08cbc        About an hour ago   1.37 GB

sameersbn/redmine      latest              f0bec095f291        2 hours ago         614.6 MB

sameersbn/gitlab       latest              bf5c375d9057        3 days ago          635.1 MB

<none>                 <none>              9cbaf023786c        3 days ago          192.8 MB

sameersbn/postgresql   latest              24a6064fa4cd        10 days ago         142.1 MB

<none>                 <none>              48648094d099        5 weeks ago         997.9 MB

<none>                 <none>              195fa62e92a8        6 weeks ago         496.4 MB

training/webapp        latest              31fa814ba25a        4 months ago        278.8 MB

sameersbn/redmine      2.4.2               b95b8046d47c        8 months ago        1.327 GB

好多<none>。删又删不了。

这主要是一些container使用了该image导致的，不不过说如今执行的容器，之前执行的也会。

docker ps -a

能够查历史记录，然后将container commit成镜像。

我们须要删除这些依赖Image的container，当使用到该镜像的全部container都删除了。就能够直接用IMAGE_ID来删除该镜像。

root@iZ28ikebrg6Z:/var/run# docker ps -a

CONTAINER ID        IMAGE                    COMMAND                CREATED             STATUS                     PORTS               NAMES

5d6373cb79e6        224b40d4b89f             "/bin/sh -c 'apt-get   25 hours ago        Exited (0) 25 hours ago                        distracted_blackwell

aa47ba8e71c8        training/webapp:latest   "python app.py"        28 hours ago        Exited (-1) 27 hours ago                       suspicious_ardinghelli

09792841c0b4        training/webapp:latest   "python app.py"        29 hours ago        Exited (-1) 27 hours ago                       compassionate_torvalds

d8eca9742031        9cbaf023786c             "/bin/sh -c 'while t   31 hours ago        Exited (-1) 30 hours ago                       mad_jones

95d20e5442f9        9cbaf023786c             "/bin/bash"            31 hours ago        Exited (0) 31 hours ago                        stupefied_torvalds

9d40292642e6        9cbaf023786c             "/bin/echo 'hello wo   31 hours ago        Exited (0) 31 hours ago                        stoic_mclean

1078d5bd868e        9cbaf023786c             "/bin/echo 'hello wo   31 hours ago        Exited (0) 31 hours ago                        high_leakey

e88cad8893f5        9cbaf023786c             "/bin/echo hello"      31 hours ago        Exited (0) 31 hours ago                        compassionate_mclean

0949d7b6148d        9cbaf023786c             "/bin/echo 'hello wo   31 hours ago        Exited (0) 31 hours ago                        romantic_carson

e5ab0f35322f        9cbaf023786c             "/bin/bash"            31 hours ago        Exited (0) 31 hours ago                        romantic_elion

9fbad8b573d3        9cbaf023786c             "/bin/bash"            32 hours ago        Exited (0) 31 hours ago                        thirsty_davinci

9ce1789ee43d        9cbaf023786c             "/bin/echo hello"      32 hours ago        Exited (0) 32 hours ago                        insane_colden     

一个个的删除

root@iZ28ikebrg6Z:/var/run# docker rm 5d63

5d63

root@iZ28ikebrg6Z:/var/run# docker rm  aa47

aa47

root@iZ28ikebrg6Z:/var/run# docker rm  0979

0979

root@iZ28ikebrg6Z:/var/run# docker rm  d8ec

d8ec

root@iZ28ikebrg6Z:/var/run# docker rm  95d

95d

root@iZ28ikebrg6Z:/var/run# docker rm  9d4

9d4

root@iZ28ikebrg6Z:/var/run# docker rm  1078

1078

root@iZ28ikebrg6Z:/var/run# docker rm  e88c

e88c

root@iZ28ikebrg6Z:/var/run# docker rm  0949

0949

root@iZ28ikebrg6Z:/var/run# docker rm  e5ab

e5ab

root@iZ28ikebrg6Z:/var/run# docker rm  9fba

9fba

root@iZ28ikebrg6Z:/var/run# docker rm  9ce1

9ce1

root@iZ28ikebrg6Z:/var/run# docker ps -a

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

root@iZ28ikebrg6Z:/var/run# docker images

REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE

sameersbn/redmine      latest              f0bec095f291        3 hours ago         614.6 MB

sameersbn/gitlab       latest              bf5c375d9057        3 days ago          635.1 MB

sameersbn/postgresql   latest              24a6064fa4cd        10 days ago         142.1 MB

<none>                 <none>              48648094d099        5 weeks ago         997.9 MB

<none>                 <none>              195fa62e92a8        6 weeks ago         496.4 MB

training/webapp        latest              31fa814ba25a        4 months ago        278.8 MB

sameersbn/redmine      2.4.2               b95b8046d47c        8 months ago        1.327 GB

root@iZ28ikebrg6Z:/var/run# docker rmi 4864

Deleted: 48648094d099bf7c38c5687f4cde3f2b7d27e8a1dc45c30d8fdf8e5f42c2473e

Deleted: 4b1b0cd0c62c3e86701bf4bc4736ca403e3ddd264101d69110bd1924bf05ec2d

Deleted: cd2308a31b296d77f1ef1562432d3908582528ed13d838a3ab6702e7d19ce604

Deleted: 212c2526444a6cefedf9d985f2727bef4b50b84062400a8f1d98b19f779baf3d

Deleted: ac89032e1c4548eaf6f6bf817850431b9180a5b7f06b29e6d7f73b4b8878fe10

Deleted: dcd2c451d11f4896c31b0178c41bf764a87625004ff0048863e627474147c413

Deleted: 7eac533353c28beeab8fd4abb5a6663abc99f0cf24d3650963352f3a41ce8e29

Deleted: 11ed21fa7166f4dee1cfe406885d889f07222a458e706c9d30c28aa9e4cfc398

Deleted: cf6daa523a25b1b947138ad883d18f8501d210ae110487066a9b4ccd8fbd9c70

Deleted: 830bf73bda66fe5ac8bf9262b5be7f4cfacec7a2dd28b7d8cb61c505e68fb787

Deleted: 41176d2b465f4072fa46897aef5f4e35a1941d73a20687bb704c2bfd789a5ae3

Deleted: fa078497ab6f0be3ce013f336ff052af7eaa96cbe2e14e3e6f6352c00544ede0

Deleted: 4477fcbe8e773d2699bf50a6a24b265fbede90ab95793e9cd36f1627348424ed

Deleted: 314c98eff22790bf333b9f98ff39576d9cfbeb3f380fe839ca74ef641b30d1f6

Deleted: 01fb8a54ae0821edb5d6d30280b56c47934efa05b158b67ad3a4a4bb9a82928b

Deleted: 533b41917c87f1479dd6cc852cf8ad11ccd9ef93d5b42978b66bbb1bb30dd476

Deleted: b9c0b9efe68d7fe7caa1c9dcfd61a0aa4a3fb4e2629b7d10c9140a495a438855

Deleted: a91d7692121d15b5399bfb0b4096aa7d696d9e0e0b44269479e5666ea3b39dd9

Deleted: 37d36b47338de2dca6f957a520016d9e7ca4db1e57d6eb38824c9ba267b29db7

Deleted: c4ff7513909dedf4ddf3a450aea68cd817c42e698ebccf54755973576525c416

Deleted: cc58e55aa5a53b572f3b9009eb07e50989553b95a1545a27dcec830939892dba

Deleted: 0ea0d582fd9027540c1f50c7f0149b237ed483d2b95ac8d107f9db5a912b4240

Deleted: d92c3c92fa73ba974eb409217bb86d8317b0727f42b73ef5a05153b729aaf96b

Deleted: 9942dd43ff211ba917d03637006a83934e847c003bef900e4808be8021dca7bd

Deleted: 1c9383292a8ff4c4196ff4ffa36e5ff24cb217606a8d1f471f4ad27c4690e290

root@iZ28ikebrg6Z:/var/run# docker images

REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE

sameersbn/redmine      latest              f0bec095f291        3 hours ago         614.6 MB

sameersbn/gitlab       latest              bf5c375d9057        3 days ago          635.1 MB

sameersbn/postgresql   latest              24a6064fa4cd        10 days ago         142.1 MB

<none>                 <none>              195fa62e92a8        6 weeks ago         496.4 MB

training/webapp        latest              31fa814ba25a        4 months ago        278.8 MB

sameersbn/redmine      2.4.2               b95b8046d47c        8 months ago        1.327 GB

root@iZ28ikebrg6Z:/var/run# docker rmi 195f

Error response from daemon: No such image: 762df2d4d7bb52a46148cf3e5ab423b30aafd58ca8f758ea78ea2cbd1b1753b6

2014/10/17 17:26:04 Error: failed to remove one or more images

root@iZ28ikebrg6Z:/var/run# docker images

REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE

sameersbn/redmine      latest              f0bec095f291        3 hours ago         614.6 MB

sameersbn/gitlab       latest              bf5c375d9057        3 days ago          635.1 MB

sameersbn/postgresql   latest              24a6064fa4cd        10 days ago         142.1 MB

training/webapp        latest              31fa814ba25a        4 months ago        278.8 MB

sameersbn/redmine      2.4.2               b95b8046d47c        8 months ago        1.327 GB

root@iZ28ikebrg6Z:/var/run# 

好，删除干净了。

还我们一个干净的工作区间。

docker的删除有两种。一个是rm 删除容器，一个是rmi删除镜像。

rm Remove one or more containers

rmi Remove one or more images

这里有两个不同的单词，images和container。当中images非常好理解。跟寻常使用的虚拟机的镜像一个意思，相当于一个模版，而container则是images执行时的的状态。

docker对于执行过的image都保留一个状态（container）。能够使用命令docker
ps来查看正在执行的container。对于已经退出的container。则能够使用docker
ps -a来查看。

假设你退出了一个container而忘记保存当中的数据。你能够使用docker
ps -a来找到相应的执行过的container使用docker commit命令将其保存为image然后执行。

回到之前的问题。因为image被某个container引用（拿来执行），假设不将这个引用的container销毁（删除），那image肯定是不能被删除。

所以想要删除执行过的images必须首先删除它的container。继续来看刚才的样例，

[yaxin@ubox ~]$docker ps -a

CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                   NAMES

117843ade696        ed9c93747fe1        /bin/sh -c /usr/sbin   46 hours ago        Up 46 hours         0.0.0.0:49153->22/tcp   test_sshd

能够看出ed9c93747fe1的image被117843ade696的container使用着。所以必须首先删除该container

[yaxin@ubox ~]$docker rm 117843ade696

Error: container_delete: Impossible to remove a running container, please stop it first

2014/03/22 16:36:44 Error: failed to remove one or more containers

出现错误，这是由于该container正在执行中(执行docker ps查看)，先将其关闭

[yaxin@ubox ~]$docker stop 117843ade696

117843ade696

[yaxin@ubox ~]$docker rm 117843ade696

117843ade696

[yaxin@ubox ~]$docker rmi ed9c93747fe1

Deleted: ed9c93747fe16627be822ad3f7feeb8b4468200e5357877d3046aa83cc44c6af

Deleted: c8a0c19429daf73074040a14e527ad5734e70363c644f18c6815388b63eedc9b

Deleted: 95dba4c468f0e53e5f1e5d76b8581d6740aab9f59141f783f8e263ccd7cf2a8e

Deleted: c25dc743e40af6858c34375d450851bd606a70ace5d04e231a7fcc6d2ea23cc1

Deleted: 20562f5714a5ce764845119399ef75e652e23135cd5c54265ff8218b61ccbd33

Deleted: c8af1dc23af7a7aea0c25ba9b28bdee68caa8866f056e4f2aa2a5fa1bcb12693

Deleted: 38fdb2c5432e08ec6121f8dbb17e1fde17d5db4c1f149a9b702785dbf7b0f3be

Deleted: 79ca14274c80ac1df1333b89b2a41c0e0e3b91cd1b267b31bef852ceab3b2044

[yaxin@ubox ~]$docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE

CentOS65            latest              e55a74a32125        2 days ago          360.6 MB

能够看出，image已经被删除