chore(#9585): teach Sentinel sign language

[dianabarsan]

Description

No longer start and stop sentinel to stop/start transitions and run scheduled tasks. Instead make it listen to two kill signals. Kill the test process if API is down in the before hook. This way we might get logs when the process ends up hanging.

9585

Code review checklist

• [ ] Readable: Concise, well named, follows the style guide, documented if necessary.
• [ ] Documented: Configuration and user documentation on cht-docs
• [ ] Tested: Unit and/or e2e where appropriate
• [ ] Internationalised: All user facing text
• [ ] Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.

Compose URLs

If Build CI hasn't passed, these may 404:

• Core
• CouchDB Single
• CouchDB Cluster

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[dianabarsan]

hey @garethbowen . Wanna do a PR review for a change?

I've added signals to sentinel so we don't need to stop and start it. It doesn't entirely stabilize the k3d suites, because it doesn't address moments when API is not starting, but for that I've added one attempt to at least stop the process from hanging and instead quit early and hopefully we'll get more info from logs.

Appreciate your time and your ideas :)

[dianabarsan]

Also fat fingered @latin-panda . Sorry for the noise!