dockerfile

Change directory command in Docker?

You can run a script, or a more complex parameter to the RUN. Here is an example from a Dockerfile I’ve downloaded to look at previously: Because of the use of ‘&&’, it will only get to the final ‘pip install’ command if all the previous commands have succeeded. In fact, since every RUN creates … Read more

What is the use of PYTHONUNBUFFERED in docker file?

Setting PYTHONUNBUFFERED to a non empty value ensures that the python output is sent straight to terminal (e.g. your container log) without being first buffered and that you can see the output of your application (e.g. django logs) in real time. This also ensures that no partial output is held in a buffer somewhere and never written … Read more

Docker: unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx

I just downloaded Docker Toolbox for Windows 10 64bit today. I’m going through the tutorial. I’m receving the following error when trying to build an image using a Dockerfile. Steps: Launched Docker Quickstart terminal. testdocker after creating it. Prepare Dockerfile as documented in “Build your own image” web link ran below command docker build -t … Read more

“docker build” requires exactly 1 argument(s)

Parameter -f changes the name of the Dockerfile (when it’s different than regular Dockerfile). It is not for passing the full path to docker build. The path goes as the first argument. Syntax is: docker build [PARAMS] PATH So in your case, this should work: docker build -f MyDockerfile -t proj:myapp /full/path/to/ or in case you are in the … Read more

What is the difference between the ‘COPY’ and ‘ADD’ commands in a Dockerfile?

You should check the ADD and COPY documentation for a more detailed description of their behaviors, but in a nutshell, the major difference is that ADD can do more than COPY: ADD allows <src> to be a URL Referring to comments below, the ADD documentation states that: If is a local tar archive in a recognized compression format (identity, gzip, bzip2 or xz) then it is unpacked as … Read more

denied: requested access to the resource is denied : docker

You may need to switch your docker repo to private before docker push. Thanks to the answer provided by Dean Wu and this comment by ses, before pushing, remember to log out, then log in from the command line to your docker hub account According to the docs: So, this means you have to tag your image before pushing: and then you should be able to push it.