add Ubuntu Resolute Raccoon RFC#1498
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| ## Summary | ||
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| The CF community should add support for Ubuntu Resolute Raccoon (26.04 LTS) as the next CF Linux operating system. This RFC proposes producing a Resolute-based BOSH stemcell, validating it across the CF component ecosystem, and providing a clear migration path for release authors and operators—particularly for the removal of the `runit` package, which is likely the most impactful change the stemcell itself introduces. |
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I though runit was already removed in noble: cloudfoundry/bosh-linux-stemcell-builder#397
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We stopped using it, but the package is still there and releases depend on it.
| - Deliver post-quantum cryptography capabilities (ML-KEM, ML-DSA, SLH-DSA via OpenSSL and OpenSSH) that are available in Resolute but not in Noble. | ||
| - Allow release authors to address breaking changes in an orderly fashion. | ||
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| The CF community skipped Ubuntu Focal in favour of Jammy ([rfc-0001](rfc-0001-jammy-os.md)), which created significant time pressure and made it nearly impossible to introduce backward-incompatible cleanups. While Noble Numbat (24.04) stemcells exist ([rfc-0026](rfc-0026-noble-os.md)), adoption across the CF ecosystem has been slow, just recently becoming the default in cf-deployment. Adopting a Resolute stemcell now will allow platform engineers to migrate directly from Jammy to Resolute while staying under support. |
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Slow adoption was because of blockers on the garden and bosh side, not because a lack of interest in the community. How will Resolute be available quicker?
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We're getting strong signals that the post quantum cryptograph is going to drive demand. We also expect the desire to jump upgrade from Jammy to Resolute to drive demand as well.
On the supply side we won't have anything nearly as disruptive as the cgroupsv2 changes in Noble. I've compiled and deployed cf-release with my PoC and only a few releases needed minor changes.
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| ### What the Resolute Stemcell Is NOT Changing | ||
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| - **`monit` remains supported**: All BOSH jobs currently managed by monit will continue to work on the Resolute stemcell. Introducing a `monit` alternative is a worthy goal and something the RFC author plans to write an RFC for. However it does not need to be coupled with the release of the Resolute stemcell as it will be an additive change. At that point `monit` deprecation should be announced and it should be removed in the next stemcell line. |
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This was announced as an intention for noble, so by this logic it should be removed in Resolute.
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Somebody's got to do the work to ship a replacement, then there then needs to be a transition period for releases, and then we can remove monit.
I've started exploring this with a PoC and am working on an RFC for it.
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See this RFC in Rendered Markdown
Summary
The CF community should add support for Ubuntu Resolute Raccoon (26.04 LTS) as the next CF Linux operating system. This RFC proposes producing a Resolute-based BOSH stemcell, validating it across the CF component ecosystem, and providing a clear migration path for release authors and operators—particularly for the removal of the runit package, which is likely the most impactful change the stemcell itself introduces.