Question

我想删除Docker守护程序；因为这会占用我的PC上更多的空间我确实插入了安装php:5.3-apache

的代码

我使用了docker build -t my-php-app这个命令。

我收到此错误

Sending build context to Docker daemon  7.039GB
Error response from daemon: unexpected error reading Dockerfile: read /var/lib/docker/tmp/docker-builder079515785/dockerfile: is a directory

所以我想删除该守护进程，因为它占用了我PC上的很大空间；我确实尝试了3次来安装它，每次都出现相同的错误，所以我现在有超过21GB的空间要清理。

docker镜像给我：

orsolin/docker-php-5.3-apache   latest              d8e72369c6e9        2 years ago         533MB

但是我计算机上的空间已从30GB减少到8GB

我看不到7GB的大小

REPOSITORY                      TAG                 IMAGE ID            CREATED             SIZE
abv_web                         latest              2194cdd678e3        45 hours ago        5.09GB
<none>                          <none>              58b330f4aa2f        46 hours ago        623MB
<none>                          <none>              c4b5c889111d        46 hours ago        623MB
<none>                          <none>              cfe4161b5af4        46 hours ago        623MB
<none>                          <none>              f37f2a95529a        46 hours ago        623MB
httpd                           latest              19459a872194        4 days ago          154MB
phpmyadmin/phpmyadmin           latest              d8d2c1fd1eb9        9 days ago          458MB
phpmyadmin/phpmyadmin           edge                4b557b055a8c        9 days ago          458MB
pweb_joomla                     latest              22c6d70d575e        10 days ago         1.01GB
fweb_joomla                     latest              0e36548560af        11 days ago         2.47GB
joomla                          apache              73acf8852f1b        13 days ago         461MB
mysql                           5.6                 732765f8c7d2        4 weeks ago         257MB
joomla                          3.9.5-apache        398227376f4a        4 months ago        415MB
alterway/php                    5.3-apache          87058120bc90        8 months ago        623MB
orsolin/docker-php-5.3-apache   latest              d8e72369c6e9        2 years ago         533MB
airinuit_mysql                  latest              fa73519d1891        2 years ago         304MB
vsamov/mysql-5.1.73             latest              fa73519d1891        2 years ago         304MB

Answer 1

Docker内部运行在客户端/服务器架构上。特别是，当您运行docker build时，它将创建您指定目录的tar文件，将该tar文件通过套接字发送到Docker守护程序，然后在其中解压缩。（即使在完全本地的系统上也是如此。）

如果出现问题，可以在/var/lib/docker/tmp中备份该内容。通常，您根本不需要浏览/var/lib/docker，但清理该目录应该是安全的。考虑在执行该操作时停止该守护程序。停止守护程序，删除所有/var/lib/docker并重新启动守护程序也将有所帮助（您将需要重新{docker build和/或docker pull映像并重新运行容器，这将在尚未备份的命名卷中丢失任何内容。

7.039 GB的构建上下文非常大。除了类似这样的问题，它只会导致docker build步骤非常缓慢；如果所有这些内容都COPY编辑进入图像，则尝试docker push构建的图像时，您可能会遇到类似的问题。您可以尝试清理掉日志文件或堆转储之类的东西；将.git目录或本地供应商树之类的内容添加到.dockerignore文件中也可以帮助减小上下文的大小。

Answer 2

您不想删除该守护程序，该守护程序实际上是您的主机上运行的能够运行docker命令的软件。

如果要删除现有的映像，卷，容器，网络，构建缓存，可以深入该命令

docker system prune

请注意，它会删除很多您可能仍会使用的东西。

如果要确定占用主机空间的原因，则在进行任何清理之前，还可以运行

$ docker system df

TYPE                TOTAL               ACTIVE              SIZE                RECLAIMABLE
Images              5                   2                   16.43 MB            11.63 MB (70%)
Containers          2                   0                   212 B               212 B (100%)
Local Volumes       2                   1                   36 B                0 B (0%)

有关它的文档： https://docs.docker.com/engine/reference/commandline/system_df/

这可能会回收主机上的大量空间，甚至会给您它回收的空间量的总和：

$ docker system prune

WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all dangling images
        - all build cache
Are you sure you want to continue? [y/N] y

Deleted Containers:
f44f9b81948b3919590d5f79a680d8378f1139b41952e219830a33027c80c867
792776e68ac9d75bce4092bc1b5cc17b779bc926ab04f4185aec9bf1c0d4641f

Deleted Networks:
network1
network2

Deleted Images:
untagged: hello-world@sha256:f3b3b28a45160805bb16542c9531888519430e9e6d6ffc09d72261b0d26ff74f
deleted: sha256:1815c82652c03bfd8644afda26fb184f2ed891d921b20a0703b46768f9755c57
deleted: sha256:45761469c965421a92a69cc50e92c01e0cfa94fe026cdd1233445ea00e96289a

Total reclaimed space: 1.84kB

最根本的形式是：

$ docker system prune --all --volumes

WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all volumes not used by at least one container
        - all images without at least one container associated to them
        - all build cache
Are you sure you want to continue? [y/N] y

Deleted Containers:
0998aa37185a1a7036b0e12cf1ac1b6442dcfa30a5c9650a42ed5010046f195b
73958bfb884fa81fa4cc6baf61055667e940ea2357b4036acbbe25a60f442a4d

Deleted Networks:
my-network-a
my-network-b

Deleted Volumes:
named-vol

Deleted Images:
untagged: my-curl:latest
deleted: sha256:7d88582121f2a29031d92017754d62a0d1a215c97e8f0106c586546e7404447d
deleted: sha256:dd14a93d83593d4024152f85d7c63f76aaa4e73e228377ba1d130ef5149f4d8b
untagged: alpine:3.3
deleted: sha256:695f3d04125db3266d4ab7bbb3c6b23aa4293923e762aa2562c54f49a28f009f
untagged: alpine:latest
deleted: sha256:ee4603260daafe1a8c2f3b78fd760922918ab2441cbb2853ed5c439e59c52f96
deleted: sha256:9007f5987db353ec398a223bc5a135c5a9601798ba20a1abba537ea2f8ac765f
deleted: sha256:71fa90c8f04769c9721459d5aa0936db640b92c8c91c9b589b54abd412d120ab
deleted: sha256:bb1c3357b3c30ece26e6604aea7d2ec0ace4166ff34c3616701279c22444c0f3
untagged: my-jq:latest
deleted: sha256:6e66d724542af9bc4c4abf4a909791d7260b6d0110d8e220708b09e4ee1322e1
deleted: sha256:07b3fa89d4b17009eb3988dfc592c7d30ab3ba52d2007832dffcf6d40e3eda7f
deleted: sha256:3a88a5c81eb5c283e72db2dbc6d65cbfd8e80b6c89bb6e714cfaaa0eed99c548

Total reclaimed space: 13.5 MB

文档可在此处找到： https://docs.docker.com/engine/reference/commandline/system_prune/

Docker Delete守护程序

2 个答案: