How to execute Linux command in host-machine and copy the output to image build by docker file?

Question

I want to copy the my.cnf file present in the host server to child docker image wherever I run docker file that uses a custom base image having below command.

ONBUILD ADD locate -i my.cnf|grep -ioh 'my.cnf'|head -1 /

but above line is breaking docker file. Please share correct syntax or alternatives to achieve the same.

@asynts I know the command to copy normal file but here in my question as you can see am trying to copy the output of a linux command, please share command to achieve same. — sudhir tataraju
– sudhir tataraju, Commented Nov 29, 2018 at 5:16

Max · Accepted Answer · 2018-12-24 02:41:54Z

1

Unfortunately, you can't declare host commands inside your Dockerfile. See Execute command on host during docker build .

Your best bet is probably to tweak your deployment scripts to locate my.cnf on the host before running docker build.

answered Dec 24, 2018 at 2:41

Max

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