How should I copy a file from a container to another container?

[csa777]

My use case: I have a containerized service that runs in a container. This service has several integration tests that make use of test containers. Some of these containers need to be able to read a file before starting so in the initialization of the GenericContainer I would use withCopyFileToContainer(MountableFile.forClassPathResource(...)) to copy a file from the container in which the tests run to the test container, but this does not work. The file is not being copied. I assume withCopyFileToContainer only works if it is being invoked on the host.

[aidando73]

Hi @csa777 do you have a code snippet of what you mean? I'm having a trouble visualizing your setup.

[kiview]

withCopyFileToContainer should work for your use case. The JVM process would read the file from the filesystem where the JVM process is running (meaning the process executing the tests) and copy it into the container. I think you need to share some more code so that others understand your issue and can help you.

Maybe you want to first download the file from container A and then copy it into container B?

Note: I converted this issue into a discussion since it is a general question.