• 第 3 章 镜像


    第一个 Dockerfile

    1 FROM ubuntu
    2 RUN apt-get update && apt-get install -y vim

     运行 docker build 命令构建镜像并详细分析每个细节

      1 root@ubuntu:~# pwd
      2 /root
      3 root@ubuntu:~#
      4 root@ubuntu:~# cat Dockerfile 
      5 FROM ubuntu
      6 RUN apt-get update && apt-get install -y vim
      7 root@ubuntu:~# 
      8 root@ubuntu:~# docker build -t ubuntu-with-vi-dockerfile .
      9 Sending build context to Docker daemon  24.06kB
     10 Step 1/2 : FROM ubuntu
     11  ---> 1d9c17228a9e
     12 Step 2/2 : RUN apt-get update && apt-get install -y vim
     13  ---> Running in 1ffb347c507f
     14 Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
     15 Get:2 http://archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
     16 Get:3 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 Packages [1367 B]
     17 Get:4 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [135 kB]
     18 Get:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
     19 Get:6 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [300 kB]
     20 Get:7 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
     21 Get:8 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages [1344 kB]
     22 Get:9 http://archive.ubuntu.com/ubuntu bionic/restricted amd64 Packages [13.5 kB]
     23 Get:10 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages [11.3 MB]
     24 Get:11 http://archive.ubuntu.com/ubuntu bionic/multiverse amd64 Packages [186 kB]
     25 Get:12 http://archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [10.7 kB]
     26 Get:13 http://archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 Packages [6931 B]
     27 Get:14 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [900 kB]
     28 Get:15 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [618 kB]
     29 Get:16 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 Packages [3655 B]
     30 Fetched 15.3 MB in 48s (321 kB/s)
     31 Reading package lists...
     32 Reading package lists...
     33 Building dependency tree...
     34 Reading state information...
     35 The following additional packages will be installed:
     36   file libexpat1 libgpm2 libmagic-mgc libmagic1 libmpdec2 libpython3.6
     37   libpython3.6-minimal libpython3.6-stdlib libreadline7 libsqlite3-0 libssl1.1
     38   mime-support readline-common vim-common vim-runtime xxd xz-utils
     39 Suggested packages:
     40   gpm readline-doc ctags vim-doc vim-scripts
     41 The following NEW packages will be installed:
     42   file libexpat1 libgpm2 libmagic-mgc libmagic1 libmpdec2 libpython3.6
     43   libpython3.6-minimal libpython3.6-stdlib libreadline7 libsqlite3-0 libssl1.1
     44   mime-support readline-common vim vim-common vim-runtime xxd xz-utils
     45 0 upgraded, 19 newly installed, 0 to remove and 0 not upgraded.
     46 Need to get 12.7 MB of archives.
     47 After this operation, 61.0 MB of additional disk space will be used.
     48 Get:1 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libmagic-mgc amd64 1:5.32-2ubuntu0.1 [184 kB]
     49 Get:2 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libmagic1 amd64 1:5.32-2ubuntu0.1 [68.4 kB]
     50 Get:3 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 file amd64 1:5.32-2ubuntu0.1 [22.1 kB]
     51 Get:4 http://archive.ubuntu.com/ubuntu bionic/main amd64 libexpat1 amd64 2.2.5-3 [80.2 kB]
     52 Get:5 http://archive.ubuntu.com/ubuntu bionic/main amd64 libmpdec2 amd64 2.4.2-1ubuntu1 [84.1 kB]
     53 Get:6 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libssl1.1 amd64 1.1.0g-2ubuntu4.3 [1130 kB]
     54 Get:7 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython3.6-minimal amd64 3.6.7-1~18.04 [531 kB]
     55 Get:8 http://archive.ubuntu.com/ubuntu bionic/main amd64 mime-support all 3.60ubuntu1 [30.1 kB]
     56 Get:9 http://archive.ubuntu.com/ubuntu bionic/main amd64 readline-common all 7.0-3 [52.9 kB]
     57 Get:10 http://archive.ubuntu.com/ubuntu bionic/main amd64 libreadline7 amd64 7.0-3 [124 kB]
     58 Get:11 http://archive.ubuntu.com/ubuntu bionic/main amd64 libsqlite3-0 amd64 3.22.0-1 [496 kB]
     59 Get:12 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython3.6-stdlib amd64 3.6.7-1~18.04 [1711 kB]
     60 Get:13 http://archive.ubuntu.com/ubuntu bionic/main amd64 xxd amd64 2:8.0.1453-1ubuntu1 [49.2 kB]
     61 Get:14 http://archive.ubuntu.com/ubuntu bionic/main amd64 vim-common all 2:8.0.1453-1ubuntu1 [70.4 kB]
     62 Get:15 http://archive.ubuntu.com/ubuntu bionic/main amd64 xz-utils amd64 5.2.2-1.3 [83.8 kB]
     63 Get:16 http://archive.ubuntu.com/ubuntu bionic/main amd64 libgpm2 amd64 1.20.7-5 [15.1 kB]
     64 Get:17 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython3.6 amd64 3.6.7-1~18.04 [1415 kB]
     65 Get:18 http://archive.ubuntu.com/ubuntu bionic/main amd64 vim-runtime all 2:8.0.1453-1ubuntu1 [5437 kB]
     66 Get:19 http://archive.ubuntu.com/ubuntu bionic/main amd64 vim amd64 2:8.0.1453-1ubuntu1 [1152 kB]
     67 debconf: delaying package configuration, since apt-utils is not installed
     68 Fetched 12.7 MB in 38s (332 kB/s)
     69 Selecting previously unselected package libmagic-mgc.
     70 (Reading database ... 4039 files and directories currently installed.)
     71 Preparing to unpack .../00-libmagic-mgc_1%3a5.32-2ubuntu0.1_amd64.deb ...
     72 Unpacking libmagic-mgc (1:5.32-2ubuntu0.1) ...
     73 Selecting previously unselected package libmagic1:amd64.
     74 Preparing to unpack .../01-libmagic1_1%3a5.32-2ubuntu0.1_amd64.deb ...
     75 Unpacking libmagic1:amd64 (1:5.32-2ubuntu0.1) ...
     76 Selecting previously unselected package file.
     77 Preparing to unpack .../02-file_1%3a5.32-2ubuntu0.1_amd64.deb ...
     78 Unpacking file (1:5.32-2ubuntu0.1) ...
     79 Selecting previously unselected package libexpat1:amd64.
     80 Preparing to unpack .../03-libexpat1_2.2.5-3_amd64.deb ...
     81 Unpacking libexpat1:amd64 (2.2.5-3) ...
     82 Selecting previously unselected package libmpdec2:amd64.
     83 Preparing to unpack .../04-libmpdec2_2.4.2-1ubuntu1_amd64.deb ...
     84 Unpacking libmpdec2:amd64 (2.4.2-1ubuntu1) ...
     85 Selecting previously unselected package libssl1.1:amd64.
     86 Preparing to unpack .../05-libssl1.1_1.1.0g-2ubuntu4.3_amd64.deb ...
     87 Unpacking libssl1.1:amd64 (1.1.0g-2ubuntu4.3) ...
     88 Selecting previously unselected package libpython3.6-minimal:amd64.
     89 Preparing to unpack .../06-libpython3.6-minimal_3.6.7-1~18.04_amd64.deb ...
     90 Unpacking libpython3.6-minimal:amd64 (3.6.7-1~18.04) ...
     91 Selecting previously unselected package mime-support.
     92 Preparing to unpack .../07-mime-support_3.60ubuntu1_all.deb ...
     93 Unpacking mime-support (3.60ubuntu1) ...
     94 Selecting previously unselected package readline-common.
     95 Preparing to unpack .../08-readline-common_7.0-3_all.deb ...
     96 Unpacking readline-common (7.0-3) ...
     97 Selecting previously unselected package libreadline7:amd64.
     98 Preparing to unpack .../09-libreadline7_7.0-3_amd64.deb ...
     99 Unpacking libreadline7:amd64 (7.0-3) ...
    100 Selecting previously unselected package libsqlite3-0:amd64.
    101 Preparing to unpack .../10-libsqlite3-0_3.22.0-1_amd64.deb ...
    102 Unpacking libsqlite3-0:amd64 (3.22.0-1) ...
    103 Selecting previously unselected package libpython3.6-stdlib:amd64.
    104 Preparing to unpack .../11-libpython3.6-stdlib_3.6.7-1~18.04_amd64.deb ...
    105 Unpacking libpython3.6-stdlib:amd64 (3.6.7-1~18.04) ...
    106 Selecting previously unselected package xxd.
    107 Preparing to unpack .../12-xxd_2%3a8.0.1453-1ubuntu1_amd64.deb ...
    108 Unpacking xxd (2:8.0.1453-1ubuntu1) ...
    109 Selecting previously unselected package vim-common.
    110 Preparing to unpack .../13-vim-common_2%3a8.0.1453-1ubuntu1_all.deb ...
    111 Unpacking vim-common (2:8.0.1453-1ubuntu1) ...
    112 Selecting previously unselected package xz-utils.
    113 Preparing to unpack .../14-xz-utils_5.2.2-1.3_amd64.deb ...
    114 Unpacking xz-utils (5.2.2-1.3) ...
    115 Selecting previously unselected package libgpm2:amd64.
    116 Preparing to unpack .../15-libgpm2_1.20.7-5_amd64.deb ...
    117 Unpacking libgpm2:amd64 (1.20.7-5) ...
    118 Selecting previously unselected package libpython3.6:amd64.
    119 Preparing to unpack .../16-libpython3.6_3.6.7-1~18.04_amd64.deb ...
    120 Unpacking libpython3.6:amd64 (3.6.7-1~18.04) ...
    121 Selecting previously unselected package vim-runtime.
    122 Preparing to unpack .../17-vim-runtime_2%3a8.0.1453-1ubuntu1_all.deb ...
    123 Adding 'diversion of /usr/share/vim/vim80/doc/help.txt to /usr/share/vim/vim80/doc/help.txt.vim-tiny by vim-runtime'
    124 Adding 'diversion of /usr/share/vim/vim80/doc/tags to /usr/share/vim/vim80/doc/tags.vim-tiny by vim-runtime'
    125 Unpacking vim-runtime (2:8.0.1453-1ubuntu1) ...
    126 Selecting previously unselected package vim.
    127 Preparing to unpack .../18-vim_2%3a8.0.1453-1ubuntu1_amd64.deb ...
    128 Unpacking vim (2:8.0.1453-1ubuntu1) ...
    129 Setting up readline-common (7.0-3) ...
    130 Setting up libexpat1:amd64 (2.2.5-3) ...
    131 Setting up mime-support (3.60ubuntu1) ...
    132 Setting up xxd (2:8.0.1453-1ubuntu1) ...
    133 Setting up libgpm2:amd64 (1.20.7-5) ...
    134 Setting up libreadline7:amd64 (7.0-3) ...
    135 Setting up libmagic-mgc (1:5.32-2ubuntu0.1) ...
    136 Setting up libmagic1:amd64 (1:5.32-2ubuntu0.1) ...
    137 Processing triggers for libc-bin (2.27-3ubuntu1) ...
    138 Setting up libssl1.1:amd64 (1.1.0g-2ubuntu4.3) ...
    139 debconf: unable to initialize frontend: Dialog
    140 debconf: (TERM is not set, so the dialog frontend is not usable.)
    141 debconf: falling back to frontend: Readline
    142 debconf: unable to initialize frontend: Readline
    143 debconf: (Can't locate Term/ReadLine.pm in @INC (you may need to install the Term::ReadLine module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.26.1 /usr/local/share/perl/5.26.1 /usr/lib/x86_64-linux-gnu/perl5/5.26 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.26 /usr/share/perl/5.26 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at /usr/share/perl5/Debconf/FrontEnd/Readline.pm line 7.)
    144 debconf: falling back to frontend: Teletype
    145 Setting up xz-utils (5.2.2-1.3) ...
    146 update-alternatives: using /usr/bin/xz to provide /usr/bin/lzma (lzma) in auto mode
    147 update-alternatives: warning: skip creation of /usr/share/man/man1/lzma.1.gz because associated file /usr/share/man/man1/xz.1.gz (of link group lzma) doesn't exist
    148 update-alternatives: warning: skip creation of /usr/share/man/man1/unlzma.1.gz because associated file /usr/share/man/man1/unxz.1.gz (of link group lzma) doesn't exist
    149 update-alternatives: warning: skip creation of /usr/share/man/man1/lzcat.1.gz because associated file /usr/share/man/man1/xzcat.1.gz (of link group lzma) doesn't exist
    150 update-alternatives: warning: skip creation of /usr/share/man/man1/lzmore.1.gz because associated file /usr/share/man/man1/xzmore.1.gz (of link group lzma) doesn't exist
    151 update-alternatives: warning: skip creation of /usr/share/man/man1/lzless.1.gz because associated file /usr/share/man/man1/xzless.1.gz (of link group lzma) doesn't exist
    152 update-alternatives: warning: skip creation of /usr/share/man/man1/lzdiff.1.gz because associated file /usr/share/man/man1/xzdiff.1.gz (of link group lzma) doesn't exist
    153 update-alternatives: warning: skip creation of /usr/share/man/man1/lzcmp.1.gz because associated file /usr/share/man/man1/xzcmp.1.gz (of link group lzma) doesn't exist
    154 update-alternatives: warning: skip creation of /usr/share/man/man1/lzgrep.1.gz because associated file /usr/share/man/man1/xzgrep.1.gz (of link group lzma) doesn't exist
    155 update-alternatives: warning: skip creation of /usr/share/man/man1/lzegrep.1.gz because associated file /usr/share/man/man1/xzegrep.1.gz (of link group lzma) doesn't exist
    156 update-alternatives: warning: skip creation of /usr/share/man/man1/lzfgrep.1.gz because associated file /usr/share/man/man1/xzfgrep.1.gz (of link group lzma) doesn't exist
    157 Setting up vim-common (2:8.0.1453-1ubuntu1) ...
    158 Setting up libsqlite3-0:amd64 (3.22.0-1) ...
    159 Setting up vim-runtime (2:8.0.1453-1ubuntu1) ...
    160 Setting up libmpdec2:amd64 (2.4.2-1ubuntu1) ...
    161 Setting up file (1:5.32-2ubuntu0.1) ...
    162 Setting up libpython3.6-minimal:amd64 (3.6.7-1~18.04) ...
    163 Setting up libpython3.6-stdlib:amd64 (3.6.7-1~18.04) ...
    164 Setting up libpython3.6:amd64 (3.6.7-1~18.04) ...
    165 Setting up vim (2:8.0.1453-1ubuntu1) ...
    166 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/vim (vim) in auto mode
    167 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/vimdiff (vimdiff) in auto mode
    168 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/rvim (rvim) in auto mode
    169 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/rview (rview) in auto mode
    170 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/vi (vi) in auto mode
    171 update-alternatives: warning: skip creation of /usr/share/man/fr/man1/vi.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group vi) doesn't exist
    172 update-alternatives: warning: skip creation of /usr/share/man/it/man1/vi.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group vi) doesn't exist
    173 update-alternatives: warning: skip creation of /usr/share/man/pl/man1/vi.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group vi) doesn't exist
    174 update-alternatives: warning: skip creation of /usr/share/man/ru/man1/vi.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group vi) doesn't exist
    175 update-alternatives: warning: skip creation of /usr/share/man/ja/man1/vi.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group vi) doesn't exist
    176 update-alternatives: warning: skip creation of /usr/share/man/man1/vi.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group vi) doesn't exist
    177 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/view (view) in auto mode
    178 update-alternatives: warning: skip creation of /usr/share/man/fr/man1/view.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group view) doesn't exist
    179 update-alternatives: warning: skip creation of /usr/share/man/it/man1/view.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group view) doesn't exist
    180 update-alternatives: warning: skip creation of /usr/share/man/pl/man1/view.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group view) doesn't exist
    181 update-alternatives: warning: skip creation of /usr/share/man/ru/man1/view.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group view) doesn't exist
    182 update-alternatives: warning: skip creation of /usr/share/man/ja/man1/view.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group view) doesn't exist
    183 update-alternatives: warning: skip creation of /usr/share/man/man1/view.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group view) doesn't exist
    184 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/ex (ex) in auto mode
    185 update-alternatives: warning: skip creation of /usr/share/man/fr/man1/ex.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group ex) doesn't exist
    186 update-alternatives: warning: skip creation of /usr/share/man/it/man1/ex.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group ex) doesn't exist
    187 update-alternatives: warning: skip creation of /usr/share/man/pl/man1/ex.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group ex) doesn't exist
    188 update-alternatives: warning: skip creation of /usr/share/man/ru/man1/ex.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group ex) doesn't exist
    189 update-alternatives: warning: skip creation of /usr/share/man/ja/man1/ex.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group ex) doesn't exist
    190 update-alternatives: warning: skip creation of /usr/share/man/man1/ex.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group ex) doesn't exist
    191 update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/editor (editor) in auto mode
    192 update-alternatives: warning: skip creation of /usr/share/man/fr/man1/editor.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group editor) doesn't exist
    193 update-alternatives: warning: skip creation of /usr/share/man/it/man1/editor.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group editor) doesn't exist
    194 update-alternatives: warning: skip creation of /usr/share/man/pl/man1/editor.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group editor) doesn't exist
    195 update-alternatives: warning: skip creation of /usr/share/man/ru/man1/editor.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group editor) doesn't exist
    196 update-alternatives: warning: skip creation of /usr/share/man/ja/man1/editor.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group editor) doesn't exist
    197 update-alternatives: warning: skip creation of /usr/share/man/man1/editor.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group editor) doesn't exist
    198 Processing triggers for libc-bin (2.27-3ubuntu1) ...
    199 Removing intermediate container 1ffb347c507f
    200  ---> 1e996ab06bb9
    201 Successfully built 1e996ab06bb9
    202 Successfully tagged ubuntu-with-vi-dockerfile:latest
    203 root@ubuntu:~# 
    204 root@ubuntu:~# docker images
    205 REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
    206 ubuntu-with-vi-dockerfile   latest              1e996ab06bb9        5 minutes ago       170MB
    207 ubuntu-with-vi              latest              b5410dfa9a42        5 days ago          170MB
    208 ubuntu                      latest              1d9c17228a9e        5 days ago          86.7MB
    209 root@ubuntu:~#
    1. 当前目录为 /root
    2. 准备Dockerfile
    3. 运行 docker build 命令,-t 指定新镜像名ubuntu-with-vi-dockerfile,命令末尾的 . 指明 build context 为当前目录。Docker 默认会从 build context 中查找 Dockerfile 文件,我们也可以通过 -f 参数指定 Dockerfile 的位置。
    4. 镜像真正的构建过程,Docker 将 build context 中的所有文件发送给 Docker daemon。build context 为镜像构建提供所需要的文件或目录。 Dockerfile 中的 ADD、COPY 等命令可以将 build context 中的文件添加到镜像。注:build context 为当前目录 /root,该目录下的所有文件和子目录都会被发送给 Docker daemon。所以不要将多余文件放到 build context,特别不要把 //usr 作为 build context,否则构建过程会相当缓慢甚至失败。
    5. Step 1:执行 FROM,将 ubuntu 作为 base 镜像。
    6. Step 2:执行 RUN,安装 vim。
    7. 启动临时容器(1ffb347c507f),在容器中通过 apt-get 安装 vim。
    8. 安装成功后,将容器保存为镜像。这一步底层使用的是类似 docker commit 的命令。
    9. 删除临时容器 9f4d4166f7e3。
    10. 镜像构建成功。 通过 docker images 查看镜像信息

    镜像的构建历史

    docker history 会显示镜像的构建历史,也就是 Dockerfile 的执行过程。

     1 root@ubuntu:~# docker history ubuntu
     2 IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
     3 1d9c17228a9e        5 days ago          /bin/sh -c #(nop)  CMD ["/bin/bash"]            0B                  
     4 <missing>           5 days ago          /bin/sh -c mkdir -p /run/systemd && echo 'do…   7B                  
     5 <missing>           5 days ago          /bin/sh -c rm -rf /var/lib/apt/lists/*          0B                  
     6 <missing>           5 days ago          /bin/sh -c set -xe   && echo '#!/bin/sh' > /…   745B                
     7 <missing>           5 days ago          /bin/sh -c #(nop) ADD file:c0f17c7189fc11b6a…   86.7MB              
     8 root@ubuntu:~# docker history ubuntu-with-vi-dockerfile:latest 
     9 IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
    10 1e996ab06bb9        25 minutes ago      /bin/sh -c apt-get update && apt-get install…   83.8MB              
    11 1d9c17228a9e        5 days ago          /bin/sh -c #(nop)  CMD ["/bin/bash"]            0B                  
    12 <missing>           5 days ago          /bin/sh -c mkdir -p /run/systemd && echo 'do…   7B                  
    13 <missing>           5 days ago          /bin/sh -c rm -rf /var/lib/apt/lists/*          0B                  
    14 <missing>           5 days ago          /bin/sh -c set -xe   && echo '#!/bin/sh' > /…   745B                
    15 <missing>           5 days ago          /bin/sh -c #(nop) ADD file:c0f17c7189fc11b6a…   86.7MB              
    16 root@ubuntu:~# 

    这个新镜像层的内容由 RUN apt-get update && apt-get install -y vim 生成。

    ------------引用来自------------ 

    https://mp.weixin.qq.com/s?__biz=MzIwMTM5MjUwMg==&mid=2653587598&idx=1&sn=d0952497b3a2272eee05cfb1e4e05e62&chksm=8d308097ba47098189b45ba63c4040cf94d687fb19c54b9cab593df9995612ce0b0632e9a54e&scene=21#wechat_redirect

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  • 原文地址:https://www.cnblogs.com/gsophy/p/10195843.html
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