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I have my containers running with docker-compose.yml configuration. After that, if I updated my docker-compose.yml file, do I need to rebuild the image or is it fine just restart the containers to have the updated configuration being applied?
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You don't need to rebuild your Docker image in development for each tiny code change. If you mount your code into your dev container, you don't have to build a new image on every code change and iterate faster. It's a great feeling when you make changes and see the results right away!
If you change a service's Dockerfile or the contents of its build directory, run docker compose build to rebuild it.
Docker Compose has a built-in pull command that will pull updated versions of all the images in your stack.
if the changes is only in docker-compose but not Dockerfile, then you do not need to re-build the image , however you need to make sure that compose is aware of the changes.
From the Docs using docker-compiose restart:
If you make changes to your docker-compose.yml configuration these changes are not reflected after running this command.
Source
the best way is to use --force-recreate , see more this
if the change is in Dockerfile , then yes you need to rebuild the image.
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