ci(e2e): give each run a unique runner tag and drop the queue - #68
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Every leg registered its runner under one shared tag against the one shared GitLab project, so a build-job could be picked up by a sibling's runner and then die with runner_system_failure when that sibling tore its kind cluster down. The workaround was a global concurrency group plus max-parallel: 1, which serialized the whole suite to about 20 minutes and, worse, let a pending run be displaced and cancelled outright: GitHub keeps only one pending run per group, so a third arrival kills the queued one with zero jobs executed and no e2e evidence for that commit. build-job is now tagged $RUNNER_TAG, a pipeline variable the suite sets when it triggers the pipeline, and the suite registers its runner under the same value. A job can therefore only be picked up by the runner its own pipeline named, so the collision is gone and with it the queue and the serialization. CI derives the tag from the run id, attempt and matrix index; locally the CI file's default still applies and nothing needs configuring. waitJobRanOnRunner already asserted the job ran on our runner. That assertion was racy before and is structurally guaranteed now. The terraform stack has been applied ahead of this commit, so the project's CI file already accepts the variable. Its default keeps the previous behaviour working for anyone on an older checkout. Refs: #67 Signed-off-by: Alexander Chernov <alexander@chernov.it>
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📝 WalkthroughWalkthroughThe e2e workflow now supports configurable runner tags. Local runs use a default tag. CI runs derive unique tags for each workflow attempt and matrix leg, then pass them through the pipeline to GitLab jobs. ChangesE2E runner isolation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The PR gives each e2e run an isolated runner tag and restores parallel execution, reducing contention and runtime. The remaining issue is a stale README statement describing serialized execution; this is non-functional and does not block merge, but should be updated. Sequence Diagram(s)sequenceDiagram
participant GitHubActions
participant E2ESuite
participant GitLabPipeline
participant BuildJob
GitHubActions->>E2ESuite: set unique GITLAB_E2E_RUNNER_TAG
E2ESuite->>GitLabPipeline: create pipeline with RUNNER_TAG
GitLabPipeline->>BuildJob: provide RUNNER_TAG
BuildJob->>BuildJob: select matching runner
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In `@test/e2e/terraform/README.md`:
- Around line 121-135: Update the earlier workflow behavior bullet in the README
to remove the stale claim that max-parallel: 1 serializes the Kubernetes matrix,
reflecting that matrix legs now run concurrently. Leave the CI tag selection and
concurrency explanation unchanged.
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.envrc.example.github/workflows/e2e.yamltest/e2e/e2e_suite_test.gotest/e2e/e2e_test.gotest/e2e/terraform/README.mdtest/e2e/terraform/main.tftest/e2e/terraform/variables.tf
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The first run of the unique-tag change failed all four legs with "Insufficient permissions to set pipeline variables" on POST /pipeline. GitLab gates who may set them via ci_pipeline_variables_minimum_override_role, added in 17.1, and a new project defaults it to no_one_allowed, so even the Maintainer token the suite uses is refused. Set it to maintainer, which matches the token's role and is the lowest value that permits the call. The docs confirm custom variables interpolate in tags but say nothing about permission to set them, which is the gap this hit. Refs: #67 Signed-off-by: Alexander Chernov <alexander@chernov.it>
The terraform README still told readers the workflow runs the matrix with max-parallel: 1 because parallel legs would collide, and the changes job still described skipping "a serialized slot". Both describe the behaviour this branch removed: legs now run concurrently because each pins its pipeline to a tag only its own runner carries. Refs: #67 Signed-off-by: Alexander Chernov <alexander@chernov.it>
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Every e2e leg registered its runner under one shared tag against the one shared GitLab project, so a
build-jobcould be picked up by a sibling's runner and then die withrunner_system_failurewhen that sibling tore its kind cluster down. The workaround was a global concurrency group plusmax-parallel: 1, which serialized the suite to roughly 20 minutes and, worse, let a queued run be cancelled outright: GitHub keeps only one pending run per group, so a third arrival kills the pending one with zero jobs executed. That is not theoretical, it happened to #67's own e2e run while I was testing it, which is whye2e-gateis not yet marked required.build-jobis now tagged$RUNNER_TAG, a pipeline variable the suite sets when triggering the pipeline, and the suite registers its runner under that same value. A job can only be picked up by the runner its own pipeline named, so the collision is gone and with it the queue and the serialization. CI derives the tag from the run id, attempt and matrix index; locally the CI file's default applies and nothing needs configuring.Three consequences: no more displacement cancellations, the matrix runs in parallel so e2e drops from about 20 minutes to about 5, and
e2e-gatebecomes safe to mark required, which was the point of #67.waitJobRanOnRunneralready asserted the job ran on our runner; that assertion was racy before and is structurally guaranteed now.The terraform stack has already been applied, so the project's
.gitlab-ci.ymlaccepts the variable today. Its default (test-gitlab-runner) keeps the previous behaviour working for anyone on an older checkout, so the apply and this merge did not need to be simultaneous.Worth knowing what this PR's own CI proves and does not. It changes Go files, so e2e runs, and a green result exercises the new tag end to end. What no local check could confirm is that an API-passed pipeline variable interpolates in
tags:; GitLab's docs say custom CI/CD variables do, and this run is the proof. The failure mode is loud rather than silent: the job would never be picked up and the suite would time out.Summary by CodeRabbit
New Features
Documentation