构建mongo映像时找不到systemctl

问题描述

我正在尝试基于官方映像Dockerfile构建mongo 4.4映像，但是遇到了找不到systemctl的问题。映像本身有一行可以在安装后将其删除，但不确定其来源。有什么想法吗？

Setting up mongodb-org-database-tools-extra (4.4.0) ...
Setting up librtmp1:amd64 (2.4+20151223.gitfa8646d.1-1) ...
Setting up libkrb5support0:amd64 (1.16-2ubuntu0.1) ...
Setting up krb5-locales (1.16-2ubuntu0.1) ...
Setting up libkeyutils1:amd64 (1.5.9-9.2ubuntu2) ...
Setting up libk5crypto3:amd64 (1.16-2ubuntu0.1) ...
Setting up libkrb5-3:amd64 (1.16-2ubuntu0.1) ...
Setting up libgssapi-krb5-2:amd64 (1.16-2ubuntu0.1) ...
Setting up libcurl4:amd64 (7.58.0-2ubuntu3.10) ...
Setting up mongodb-database-tools (100.1.1) ...
Setting up mongodb-org-mongos (4.4.0) ...
Setting up mongodb-org-tools (4.4.0) ...
Setting up mongodb-org-server (4.4.0) ...
/var/lib/dpkg/info/mongodb-org-server.postinst: 43: /var/lib/dpkg/info/mongodb-org-server.postinst: systemctl: not found
dpkg: error processing package mongodb-org-server (--configure):
 installed mongodb-org-server package post-installation script subprocess returned error exit status 127
Setting up mongodb-org-shell (4.4.0) ...
dpkg: dependency problems prevent configuration of mongodb-org:
 mongodb-org depends on mongodb-org-server; however:
  Package mongodb-org-server is not configured yet.

dpkg: error processing package mongodb-org (--configure):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.27-3ubuntu1.2) ...
Errors were encountered while processing:
 mongodb-org-server
 mongodb-org
[91mE: Sub-process /usr/bin/dpkg returned an error code (1)
[0mThe command '/bin/sh -c set -x   && export DEBIAN_FRONTEND=noninteractive    && apt-get update   && echo "mongodb-org hold" | dpkg --set-selections  && echo "mongodb-org-server hold" | dpkg --set-selections   && echo "mongodb-org-shell hold" | dpkg --set-selections    && echo "mongodb-org-mongos hold" | dpkg --set-selections   && echo "mongodb-org-tools hold" | dpkg --set-selections    && apt-get install -y       ${MONGO_PACKAGE}=$MONGO_VERSION         ${MONGO_PACKAGE}-server=$MONGO_VERSION      ${MONGO_PACKAGE}-shell=$MONGO_VERSION       ${MONGO_PACKAGE}-mongos=$MONGO_VERSION      ${MONGO_PACKAGE}-tools=$MONGO_VERSION   && rm -f /usr/local/bin/systemctl   && rm -rf /var/lib/apt/lists/*  && rm -rf /var/lib/mongodb  && mv /etc/mongod.conf /etc/mongod.conf.orig' returned a non-zero code: 100

解决方法

准确地说

RUN ln -s /bin/echo /bin/systemctl
RUN apt-get -qqy install  mongodb-org

,

FL3SH答案有效，但为了更有效地传达含义，您可以创建从/bin/systemctl到/bin/true的符号链接。

/bin/true是一个始终返回0（shell的真实值）的命令，因此它不会失败。这是表明您要返回true的标准方法。参见this SO post also

您需要在Dockerfile中添加的命令是：

RUN ln -s /bin/true /usr/local/bin/systemctl

或

RUN ln -s /bin/true /bin/systemctl

结果是您通过调用/bin/true而不是/bin/systemctl来欺骗安装后脚本

您可以在haytham的描述中找到与官方mongodb Dockerfile 4.4 line 91相同的技巧。

/bin/echo与/bin/true一样好，因为echo也返回0。您可以尝试做

echo "test"
echo $?

第二个echo的结果为0。

,

回显到/ bin / systemctl即可解决此问题。