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Updating Dependencies

Updating golang dependencies

Run make deps-update to simply update the golang dependencies to their latest states. If specific changes are needed, first manipulate our main go.mod. Dependencies for staging/client-go are located in a separate go.mod. Changing in the staging area will be inherited by the main go.mod when running make deps-update.

Updating RPM test dependencies

We can build our own base images for various architectures with bazel without the need of machines of that architecture. Out test container base images is defined at this BUILD.bazel. If you need to add new RPMs into the test base image, you can simply add the RPM package to hack/rpm-deps.sh and run make rpm-deps afterwards.

make rpm-deps can periodically be run to just update to the latest RPM packages. The resolved RPMs are then added to the WORKSPACE and the rpmtree targets in rpm/BUILD.bazel are updated. Finally no longer needed RPM definitions are removed from the WORKSPACE. The updated rpmtree dependencies are the base for the test image containers.

To update the RPM repositories in use, change repo.yaml.

This is an example entry for Fedora 32 on aarch64:

- arch: aarch64
  metalink: https://mirrors.fedoraproject.org/metalink?repo=fedora-32&arch=aarch64
  name: 32-aarch64-primary-repo

Here the corresponding entry for x86_64:

- arch: x86_64
  metalink: https://mirrors.fedoraproject.org/metalink?repo=fedora-32&arch=x86_64
  name: 32-x86_64-primary-repo

Arbitrary RPM repos can be used too. Demonstrated here by referencing a Fedora COPR repo:

- arch: x86_64
  baseurl: https://download.copr.fedorainfracloud.org/results/@kubevirt/libvirt-6.6.0-8.el8/fedora-32-x86_64/
  name: kubevirt/libvirt-copr-x86_64

More information can be found at bazeldnf.

Updating libvirt and libvirt-devel RPM dependencies

Works the same way like for the RPM test dependencies.

Verifying RPMs

bazeldnf does some initial checks based on sha256. Notably the metalink, repomd.xml and the packages XML are verified. These checks happen whenever make rpm-deps is run. However, since we have no guarantee to still have the same RPMs available on subsequent runs, it is hard to check based on this the validity of the content in CI. RPM repos use therefore GPG signing to verify the origin of the content.

Therefore, local and CI verification based on gpg keys can be performend by executing the make verify-rpm-deps command.

Onboarding new architectures

  • Create architecture specific entries in repo.yaml and hack/rpm-deps.sh.
  • Adjust the select clauses on all container entries to choose the right target architecture and the right base image.
  • Add architecture specific entries to .bazelrc

For x86_64 libvirt-devel dependencies exist for linking and unit-testing. Updating or adding such targets for other architectures is only necessary if the unit tests are supposed to be executed on the target platform. Otherwise it is sufficient to only create images for the target-platform with libvirt dependencies installed.