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[release 1.27] 🌈 Feature: Add support for Flatcar Container Linux #2213

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Merged
merged 3 commits into from
Oct 23, 2025
Merged

[release 1.27] 🌈 Feature: Add support for Flatcar Container Linux #2213

merged 3 commits into from
Oct 23, 2025
+32 −17

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@t-lo
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@t-lo t-lo commented Oct 19, 2025

What type of PR is this?

/kind feature
/kind bug

What this PR does / why we need it:

Cherry-pick of Flatcar support PR #2209 for release 1.27 as per @andyzhangx's request in #2209 (comment).

Release note:

* Add support for Flatcar Container Linux

t-lo and others added 3 commits October 19, 2025 10:45
@t-lo
feat: Add support for Flatcar Container Linux
30c0a7b 
This change adds support for Flatcar to the blobfuse installer.
Changes are minimal; we're re-using the rhcos installer script and the
gardenlinux paths.

As Flatcar currently does not ship libfuse, we install it alongside
blobfuse2.

Signed-off-by: Thilo Fromm <[email protected]>
@t-lo
fix: correctly modify PATH in install-proxy-rhcos.sh
69f4b9e 
The installer script wants to update the PATH variable to include
$BIN_PATH in blobfuse-proxs's systemd unit by setting:

Environment="PATH=<BIN_PATH>:$PATH"

BIN_PATH is evaluated in the installer script, and $PATH is escaped, to
be evaluated when the service unit runs.
However, environment variables like "$PATH" are NOT evaluated
by systemd in Environment="...". Quoting the documentation:

" Variable expansion is not performed inside the strings
  and the "$" character has no special meaning. "

https://www.freedesktop.org/software/systemd/man/latest/systemd.exec.html#Environment

This effectively removes all other paths and sets PATH to ONLY <BIN_PATH>.
The resulting environment variable PATH contains the actual contents of
BIN_PATH and a literal '$PATH'.

This commit fixes that by wrapping ExecStart in bash -c '...' and
updating PATH there.
@t-lo
chore: update helm charts
1aa7626 
Signed-off-by: Thilo Fromm <[email protected]>
@k8s-ci-robot k8s-ci-robot added kind/feature Categorizes issue or PR as related to a new feature. kind/bug Categorizes issue or PR as related to a bug. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. labels Oct 19, 2025
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k8s-ci-robot commented Oct 19, 2025

Hi @t-lo. Thanks for your PR.

I'm waiting for a github.com member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@k8s-ci-robot k8s-ci-robot added the needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. label Oct 19, 2025
@k8s-ci-robot k8s-ci-robot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Oct 19, 2025
@t-lo t-lo mentioned this pull request Oct 19, 2025
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andyzhangx
andyzhangx approved these changes Oct 19, 2025
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/ok-to-test

@k8s-ci-robot k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. approved Indicates a PR has been approved by an approver from all required OWNERS files. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Oct 19, 2025
andyzhangx
andyzhangx approved these changes Oct 23, 2025
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/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Oct 23, 2025
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k8s-ci-robot commented Oct 23, 2025

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, t-lo

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@k8s-ci-robot k8s-ci-robot merged commit 121070f into kubernetes-sigs:release-1.27 Oct 23, 2025
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