Add a script to deploy CCM with kops #945

xiaoweim · 2026-01-06T05:36:06Z

This PR introduces a script using Kops to deploy CCM, serve as a replacement for kube-up within the "Cloud Provider Last Known Good Testing" framework.

The "Cloud Provider LKG Testing" design addresses compatibility challenges by running continuous background tests to identify "Last Known Good" (LKG) pairs of Kubernetes and Cloud Provider code. This script uses kops to reliably deploy clusters for these verification tests, replacing the legacy and error-prone kube-up workflow.

Multiple Modes:
- lkg-k8s-local-gcp: Deploys LKG/Stable K8s with a locally built/Latest CCM (primary dev workflow).
- latest-k8s-lkg-gcp: Tests latest K8s with the Latest Known Good version of CCM.
- stock: Standard kops behavior.
Automated Validation: Includes kops validate cluster with a 15-minute wait to ensure the cluster is fully healthy before passing control.
Smart Lifecycle Management:
- Delete on Failure (Default): Automatically cleans up resources if deployment fails (via trap), ensuring CI hygiene.
- Keep on Success: Preserves the cluster if deployment succeeds, allowing for subsequent E2E tests or local debugging.
- Can be overridden with DELETE_CLUSTER=false.

Running the script locally: https://gist.github.com/xiaoweim/f1f436e90111a25f99851fa8c809e436

k8s-ci-robot · 2026-01-06T05:36:14Z

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k8s-ci-robot · 2026-01-06T05:36:15Z

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k8s-ci-robot · 2026-01-06T05:36:16Z

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k8s-ci-robot · 2026-01-06T05:36:16Z

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zhang-xuebin

thanks for doing this, appreciated!

zhang-xuebin · 2026-01-06T08:09:20Z

tools/kops_lkg_ccm.sh

+  echo "Environment variables:"
+  echo "  GCP_PROJECT       (Required) GCP Project ID"
+  echo "  CLUSTER_NAME      (Required) Cluster name (e.g. my-cluster.k8s.local)"
+  echo "  DELETE_CLUSTER    (Optional) Set to 'false' to keep the cluster running (default: true)"


Is this script intended for local testing? If so, is it better to set DELETE_CLUSTER default as false?

oh actually I saw you have some discussion around line 212. Probably add a usage comment section at the top and document the expected behaviour?

This script is primarily for the "Cloud Provider Last Known Good Testing" framework to verify compatibility (replacing the legacy kube-up workflow). It can also be used for local testing to help reproduce these scenarios.

tools/kops_lkg_ccm.sh

aojea · 2026-01-06T17:04:48Z

what LKG is?

/assign @justinsb

elmiko · 2026-01-06T18:01:02Z

very cool update, thank you!

xiaoweim · 2026-01-06T23:20:21Z

what LKG is?

/assign @justinsb

LKG is for Last Known Good. Reference doc: https://docs.google.com/document/d/1U1YRLsAAZsVs6VyrXj8hkfA6aJp9nDZsG5NsfZ1POPE/edit?resourcekey=0-iVuzWZn3mxL2Qil-4peFFQ&tab=t.0#heading=h.fxpk50cps4zs

aojea · 2026-01-07T08:01:39Z

That doc is obsolete, I've already implemented the skew testing automation, there is some internal doc and recording, but feel free to ping me I can explain it again.... In this case, we should also add a small doc explaining these things so the repo is self contained

cheftako · 2026-01-09T00:21:01Z

/ok-to-test

cheftako · 2026-01-09T00:21:41Z

That doc is obsolete, I've already implemented the skew testing automation, there is some internal doc and recording, but feel free to ping me I can explain it again.... In this case, we should also add a small doc explaining these things so the repo is self contained

Antonio can we have chat/meeting to go over what you have?

hdp617 · 2026-01-14T22:32:40Z

tools/kops_lkg_ccm.sh

+# Ensure bucket exists
+if ! gsutil ls -p "${GCP_PROJECT}" "${KOPS_STATE_STORE}" >/dev/null 2>&1; then
+  gsutil mb -p "${GCP_PROJECT}" -l "${GCP_LOCATION}" "${KOPS_STATE_STORE}"
+  gsutil ubla set off "${KOPS_STATE_STORE}"


Why is this needed? I don't see it documented in kops.

Ah I see it explained here. On that note, I see a lot of shared logic between this script and ./e2e/scenarios/kops-simplethat can be refactored.

Add a script to deploy CCM with kops

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k8s-ci-robot added do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. needs-triage Indicates an issue or PR lacks a `triage/foo` label and requires one. labels Jan 6, 2026

k8s-ci-robot requested review from cheftako and elmiko January 6, 2026 05:36

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k8s-ci-robot assigned justinsb Jan 6, 2026

xiaoweim marked this pull request as ready for review January 8, 2026 02:23

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k8s-ci-robot requested review from JoelSpeed and bridgetkromhout January 8, 2026 02:23

k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Jan 9, 2026

address review comments

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xiaoweim force-pushed the lkg-support branch from 1d7d3dd to e44d746 Compare January 9, 2026 00:37

minor improvements

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hdp617 reviewed Jan 14, 2026

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Add a script to deploy CCM with kops #945

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xiaoweim commented Jan 6, 2026 •

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