docker add file does not exist

docker add file does not existhow to edit file in docker container

@wilnauem the issue was closed because the documentation was updated to explain that an absolute path refers to an absolute path within the build context, not an absolute path on the host; https://github.com/docker/docker/pull/5762/files. The root '/' support (which isn't one) should be deprecated. That's fine, but also kind of missing the crux of the issue. The out put of Docker run is now: You might want to make it a habit to read the Dockerfile reference in case something is unclear: https://docs.docker.com/engine/reference/builder/#workdir. Well occasionally send you account related emails. You want to mount existing files from your host machine to the container, which should work. /home/mydir/testfile will fail with the error "no such file or directory". I.e. You want to mount an empty folder and expect the files inside the container to be copied to your local folder on your host machine. I forget to mention the relevant part: the WORKDIR instruction is not responsible to copy any files - neither from your hosts working directory, nor from any other folder. Right now trying to ADD a fully qualified file name (FQFN), e.g. I am very new to Focker but shouldnt WORKDIR make my local working directory copied in the image so I can run start.py ? You signed in with another tab or window. What about adding a new command that interprets absolute paths relative to the root of the host machine? Fair enough that ADD and COPY can't be used for this, due to how they've historically interpreted absolute paths. if absolute paths are relative to the context, and relative paths are (presumably) also relative to the context. COPY is the prefered instruction to copy the files, as it realy just copies the files (and allows to modify the ownership of the files if needed), Powered by Discourse, best viewed with JavaScript enabled, Docker can't find the file it just copied in build, https://docs.docker.com/engine/reference/builder/#workdir. Changing that format/handling would be a huge breaking change, breaking tons of existing Dockerfiles, so not an option. :). ADD of an absolute path fails with "no such file or directory" instead of "path outside context". I wasted time discovering that absolute paths are not supported. However if you have common files (tar, configuration, html etc.) But, when I mount the volumes for the config files apache2 or php (docker-compose), this file doesnt appear. I want to create a custom container from a dockerfile with apache2, php and sqlite3. /users/home/foo/project); To be clear, are ADD X Y and ADD /X Y completely identical, or is there any subtle difference at all? Successfully merging a pull request may close this issue. Its much better than getting an unhelpful lstat: : no such file or directory error message, with the root '/' removed in the path. If absolute path is relative, then why do we need it? to your account. See #2745 for more discussion of why adding files outside the build context isn't and probably won't be supported. it adds the file from the root of the context - so when you say ADD /etc/shadow /, Docker build is expecting that the user put an /etc/shadow file into the context. Perhaps we could check to see if the (FQFN) is on a mounted device and allow that? Already on GitHub? @thaJeztah The best explanation so far, thanks buddy. I have been given a project that is in a Docker container. $ python start.py, The working directory is still not the root, so your command would not work either without fixing the path by adding / to the beginning. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. The failure is on purpose for security reasons. I tried to add it in the Dockerfile but still got the same error: I dont understand the image not found issue but you should use full path in the CMD instruction. Or some other magic. The COPY instruction is responsible to copy files from the host into the image. WORKDIR also affects `docker exec. If you want to do the latter then I can see two options: Powered by Discourse, best viewed with JavaScript enabled. How can we maintain the security while at the same time solve the problem of having common files ADDed from one place. As far as I know this is an invalid volume name: image_apache/www. Your workdir is not the root directory where you copied start.py. that you may wish to include in multiple images, then you need to duplicate these files into each build directory. I totally agree with @nafg By clicking Sign up for GitHub, you agree to our terms of service and People have use-cases that would be made easier if they had some way of reaching outside of the build context when adding content to their image, such as by using an absolute path. Executes it with docker build -t mvcapp . I have managed to build the Docker container image and tag it, but when I run it I have problems. Anyway, adding / seemd to make some thins work. Either you should not use / in the volume name to create a named volume or use relative path starting with ./ to refer to a folder on your host machine. Why has this issue been closed? I also try to do this after logging into my session. privacy statement. If you use relativ paths they must be relative to the WORKDIR path. I just want to have all files in the apache2 folder on my host to config it. https://github.com/docker/docker/pull/5762/files. However at the least the message is wrong and should be something like "forbidden path outside the context". @wilnauem the issue was closed because the documentation was updated to explain that an absolute path refers to an absolute path within the build context, not an absolute path on the host; https://github.com/docker/docker/pull/5762/files. Have a question about this project? Sign in One could image having a shared file system with lots of common files that are required for different classes of images or for all images (maybe some legal/copywrite document). You can also try to go into your docker container and try to launch your app with: docker exec -it appname This is what will never happen. Hi, I am not sure I understand what you want to achieve here. It doesnt seem to find the game:latest image even though the output of the above command says it just created it. $ ls Given this directory (e.g. Docker should generate a warning when an absolute path is found, and eventually a few release later, an error. From @tianon: Imagine that I have a Dockerfile that does "ADD /etc/shadow /my/path \n RUN some-command-to-upload-your-etc-shadow-to-my-server". Add some more specific help for Dockerfile build contexts. @ipbabble I'm trying to build an image on ubuntu:latest and given below is the error : The issue still persists for me and remove unneeded documentation, so it will be obvious. Consider that the client might be remote from the docker daemon. You could run a container, use docker cp to copy the content out to ./image_apache/www and mount that back into the container so you could modify the files from the host. The text was updated successfully, but these errors were encountered: I've updated the title here to reflect the issue that needs to be fixed here. N.B:: the ADD instruction could be used as well, though it will extract archived files and as such might result in a different outcomme than expected. This please! Docker file selector should check if the docker file is in the project base path. ADD /file / works. WORKDIR sets the directory context to the specified folder. Hello, I'm running on windows, why does it replaces it to a absolute path, that doesn't exists on windows? Throw an error "Docker does not support absolute paths with this operation." This config files exist in my container (when I disable the volume on docker-compose.yaml). It wasn't obvious to me and I spend half a day fighting it.

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