Release Flatcar Container Linux Alpha 3975.0.0, Beta 3941.1.0, Stable 3815.2.3

[dongsupark]

The release of the following Flatcar Container Linux version is planning May 22, 2024.

• Alpha 3975.0.0
• Beta 3941.1.0
• Stable 3815.2.3

1. Preparation

Owner: @sayanchowdhury

• [x] A. Go/No-Go hackmd doc created from HackMD template for test tracking and release notes: (link)
• [x] B. All planned changes are merged & blocker bugs are fixed, last nightly reviewed for problems.
• [x] C. Check that the kernel PR are merged for the channel(s) to be released.

2. Build

Owner: @sayanchowdhury

• [x] A. Branched off the main branch (only for new major).
• [x] B. Tagged all the build branches.
• [x] C. Started the Jenkins builds, post the links into this issue as comment.

3. Release

i. The Go/No-Go Meeting

Owner: @sayanchowdhury

• [x] A. Test status captured in the HackMD document.
• [x] B. All tests are Green.
• [x] C. Release notes / announcements added to Go/No Go doc from container/image_changes job by selecting Timestamps: None.
• [x] D. QA: Checked the diff for image file list, packages, and image size in the container/image_changes job output. (@dongsupark)
• [x] E. Conduct Matrix Go/No Go meeting (inc. release notes review).

ii. Artifacts goes public

Owner:

• [x] A. Created the Release Notes on the scripts repo for the respective tags on GitHub as GitHub Releases.
• [x] B. Ran the container/release Release job.
• [x] C. Images uploaded with copy-to-origin.sh.
• [x] D. Symlink to "current" updated with set-symlink.sh.
• [x] E. Website updated with ./update-flatcar-versions.sh and PR merged.

iii. Payload

Owner: @tormath1

• [x] A. Update payload signed/uploaded.
• [x] B. Release package published in Nebraska (Prerequisite: 3.ii.E should marked done).

iv. Cloud Marketplace & Cluster API

Owner:

• A. Azure

  • [x] Offers updated and started publishing.
  • [x] Sent the offers to publish to Live.

• B. GCP

  • [x] Offer deployment package uploaded to Google Bucket & submit for verification.
  • [x] Offer Publish

• C. Cluster API for new Stable

  • [ ] Azure: Manually run ./azure-sig.sh to create New Shared Community Gallery Images
  • [x] ~OpenStack: documentation~

4. Announcements

Owner: @tormath1 @sayanchowdhury

• [x] A. Sent announcement to Mailing Lists
• [x] B. Sent Tweet out to Twitter, and Toot out to Mastodon
• [x] C. Brief version announcement in slack (k8s slack #flatcar) and the Flatcar Matrix channel

[dongsupark]

Jenkins:

• Alpha 3975.0.0: http://jenkins.infra.kinvolk.io:8080/job/container/job/sdk/1468/cldsv/
• Beta 3941.1.0: http://jenkins.infra.kinvolk.io:8080/job/container/job/packages_all_arches/4021/cldsv/
• Stable 3815.2.3: http://jenkins.infra.kinvolk.io:8080/job/container/job/packages_all_arches/4029/cldsv/