Because the node_exporter requires C bindings for BSD builds we need to have BSD-capable CI runners in order to test builds.

We used to have a buildkite configuration, but this has fallen into disrepair.

We have a few options.

• Repair the buildkite setup.
• Add BSD runners for CircleCI.
• Add BSD runners for GitHub Actions.

In order to do this with easier long-term maintenance, I think we should build some kind of automation around recycling the worker VMs. The original setup was built on a Packet/Equinix Metal server, which was too much work to maintain.