lhotari opened a new pull request #9627:
URL: https://github.com/apache/pulsar/pull/9627
### Motivation
Smaller `pulsar-test-latest-version` docker image size makes it feasible to
build the image once and share it between the different parallel integration
test build jobs. This will help improve the Pulsar CI in the future since it
opens up new possibilities to save build system resources (GitHub Actions
Runner VM time).
### Modifications
- Build go-lang examples in a separate temporary layer. This reduces the
final size of the image by at least 600MB.
- Cleanup files as last steps
- Cleaning up files doesn't reduce the size of the image yet since it
requires docker build squashing. The cleanup step is preparation for future
changes.
- To actually reduce the final image size, it would require
`-Ddockerfile.build.squash=true` (uses `docker build --squash`). This is not
part of this change since the image size isn't important until images are
transferred over the network. Squashing the image would just add overhead to
the current build.
- Remove Pulsar CPP library's static libraries `/usr/lib/libpulsar*.a`
(since no tests use it)
- Remove gcc compiler (since no tests use it)
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