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I am new to docker. In our docker environment - Apache has been installed and it is up and running.
Now I need to get into the container, modify the httpd.conf, save it and then I need to restart the apache.
Can you guys please let me know, what needs to be done. I am pretty much confused about - 'exec' and 'attach' commands.
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In your case, try running the script in the Dockerfile located in the /usr/local/bin/ directory as the CMD command and re-run docker-compose up -d to see if the Apache is started or not.
No need to attach or exec (which is really a debug feature anyway)
You can use docker cp to copy a local version of your httpd.conf to the container. (That way, you can modify the file from the comfort of your local environment)
docker cp httpd.conf <yourcontainer_name>:/path/to/httpd.conf Once that is done, you can send an USR1 signal to ask for a graceful restart (see docker kill syntax):
docker kill --signal="USR1" <yourcontainer_name> Replace <yourcontainer_name> by the container id or name which is running Apache.
That will only work if the main process launched by your container is
CMD ["apachectl", "-DFOREGROUND"] See more at "Docker: How to restart a service running in Docker Container"
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