问题
I am trying to build a mongo 4.4 image based on the official image Dockerfile but I am running into an issue with systemctl not found. The image itself has a line to remove it after setup, but not sure where it came from. Any ideas?
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
回答1:
To be precise
RUN ln -s /bin/echo /bin/systemctl
RUN apt-get -qqy install mongodb-org
回答2:
FL3SH answer works but to convey the meaning more effectively you can create a symbolic link from /bin/systemctl to /bin/true.
/bin/true is a command wich always return 0 (the truthy value of the shell) so it does not fail. It's a standard way to indicate that you want to return true. See this SO post also
The command you need to add in the Dockerfile is:
RUN ln -s /bin/true /usr/local/bin/systemctl
or
RUN ln -s /bin/true /bin/systemctl
The effect is that you trick the post-install script by calling /bin/true instead of /bin/systemctl
You can find the same trick into the official mongodb Dockerfile 4.4 line 91 that haytham linked in his description.
/bin/echo works as well as /bin/true because echo returns 0 as well. You can try it by doing
echo "test"
echo $?
And you'll see 0 as the result of the second echo.
回答3:
echo ln to /bin/systemctl solves the issue.
来源：https://stackoverflow.com/questions/63709096/systemctl-not-found-while-building-mongo-image