I am running into a frustrating problem when trying to create and run a new docker container. When I upload my code to a Github repository and then use Docker Hub to build it, the build completes without any errors. However, when I try to create and then run the new container on my own server I find…

Hello Why are you use Copy and volume both command use in the dockerfile COPY . /usr/src/app VOLUME /usr/src/app Copy command is a copy hole the source Folder to the destination Folder or Volume command is a Connected to your folder to container Folder

I’m not sure I totally understand your reply. My intention was to use COPY . /usr/src/app (or COPY app/ /usr/src/app) to copy all the code in my docker repository into a directory (/usr/src/app) in the newly created docker container. I then was trying to use VOLUME to make this same directory conne…

Yes you are right. You can use Both copy and volume command but you are using copy and volume command to attach same directory can you try to absolute path “COPY . /usr/src/app/” instead of use dot

If you map a bind to a volume (this is what your docker run examples do), it will replace the entire folder in the container. The pre-existing files in the target folder effectivly become unavailable. If you need to preserve files from the target folder, you will need to use a named volume, as its …

Thanks for the reply @meyay I think your suggestion is probably what I want to do, but I’m confused because I’ve run plenty of other people’s docker containers which used bind mounted directories that have had things copied into them during the build process. However, I’m not sure what they do diffe…

Thanks for clarifying @rrpnarola that makes sense to me. I’ll try this out.

I just wanted to chip in and say, having resolved a similar problem, that in my case the issue was with volume mirroring that I had set up in an upstream docker compose file driving the dockerfile. In my case I was mirroring my local directory with the working folder (so that my local changes could …

Are you sure you meant to use the words mirroring and replication in the context of volumes? When a host path is used as volume source, this host path will be bind mounted into the container path. This mount will eclipse the original content of the container path. Whatever changes are done in eithe…

Dockerfile 'COPY' command not copying files

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hoohost (Hoohost) January 14, 2021, 7:13pm 8

Clear as mud. Are you referring to a clarification that was made privately? Please share?

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Dockerfile 'COPY' command not copying files

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