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kernel: name each release guest-kernel-<version> #517

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Merged
presmihaylov merged 2 commits into from
Oct 5, 2026
Merged

kernel: name each release guest-kernel-<version> #517

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4dd5f0e
kernel: name each release guest-kernel-<version>
presmihaylov Oct 5, 2026
4fa2c1a
Merge remote-tracking branch 'origin/main' into guest-kernel-release-…
presmihaylov Oct 5, 2026
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2 changes: 1 addition & 1 deletion .github/workflows/kernel.yml
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Expand Up @@ -68,4 +68,4 @@ jobs:
run: |
tag=$(go run ./packaging/kernel/tag)
cat dist/*.sha256 > dist/SHA256SUMS
gh release create "$tag" --target "$GITHUB_SHA" --title "guest kernel $tag" --latest=false --notes "Built by the kernel workflow from packaging/kernel. Reproducible: each file was built twice." dist/Image-arm64 dist/vmlinux-amd64 dist/SHA256SUMS
gh release create "$tag" --target "$GITHUB_SHA" --title "guest-$tag" --latest=false --notes "Built by the kernel workflow from packaging/kernel. Reproducible: each file was built twice." dist/Image-arm64 dist/vmlinux-amd64 dist/SHA256SUMS
5 changes: 3 additions & 2 deletions docs/kernel.md
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Expand Up @@ -43,8 +43,9 @@ with Docker builds it faster.
The `kernel` workflow (`.github/workflows/kernel.yml`) runs on manual dispatch only. It builds each
arch twice and compares the hashes. It checks them against the hashes that `services/kernel` was
built with, then publishes `Image-arm64`, `vmlinux-amd64` and `SHA256SUMS` under the release tag
`kernel-<version>-<build>`. A hash that does not match what the Go code expects fails the workflow,
so a release can never carry a kernel that the daemon would refuse.
`kernel-<version>-<build>`, titled `guest-kernel-<version>-<build>`. A hash that does not match what
the Go code expects fails the workflow, so a release can never carry a kernel that the daemon would
refuse.

When the daemon creates a microVM provider, it checks the kernel file for the host arch. On first
use, it fetches the file into `<root>/kernel/<tag>/` and fsyncs the file and its directory. At this
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