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What changed
This changes the bare-metal GitHub Actions concurrency groups to a fixed global key:
ci-e2e-baremetal-global.Why
The previous concurrency keys were based on
${{ github.ref }}, which serialized runs only per PR ref. That still allowed bare-metal e2e jobs from different PRs to run at the same time against the sharedci-pool.That overlap can cause host reuse and cross-run interference. In the March 26, 2026 failure on PR #1850, one bare-metal run observed a hostname from another workflow run, which is consistent with concurrent use of the same bare-metal pool.
Scope
This only changes bare-metal workflows:
E2E PR Blockingbare-metal jobE2E Basic BaremetalE2E Baremetal FeatureHcloud-only jobs keep their existing per-ref concurrency.
Matching
v1.1.xPR: #1908