Who contributed to Kubernetes on June 19, 2026?

4 developers shipped this update, including cheftako, liggitt, Jefftree, and rifelpet.

What were the notable Kubernetes updates?

API only CLI, Fixing LB behavior when you have both APIServer and Control Plane, and Adding flag to enable machine type for APIServer only.

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The Wire · Showcase

KOPS SHIPS APISERVER-ONLY NODES, KUBE-OPENAPI FIXES STDLIB JSON COLLISION

By RepoJournal · Filed 06:01 UTC on June 19, 2026 · About Kubernetes

4 people shipped this

cheftako @cheftako 1 cited

liggitt @liggitt 1 cited

Jefftree @Jefftree 1 cited

rifelpet @rifelpet 1 cited

Kops now lets you run dedicated API server nodes separate from control plane workers, solving a years-old load balancer problem that sent traffic to both when you only wanted one.

Kops landed three related changes that reshape how you can distribute control plane work across nodes [1] [2] [3]. The issue: when you had both APIServer and Control Plane nodes, the load balancer sent traffic to both, forcing your core controllers to share resources with API traffic. Now with the new --api-server-size flag and DNS None routing, traffic routes only to APIServer nodes, protecting controller capacity. This is the topology you've been asking for. Over in kube-openapi, a critical fix landed to insulate go-json-experiment from stdlib JSON packages [4] [5]. Without this, Go 1.27's changing json/v2 prerelease behavior was causing unit test failures. The fix drops aliases to json/v1 and json/v2, ensuring go-json-experiment stays self-contained until the actual stdlib migration. Test-infra cleaned up benchmark noise by removing yaml, table, and json-pretty LIST benchmark jobs [6], keeping only JSON, proto, and cbor for cleaner signal on scalability regressions. Kops also hardened RHEL 10+ support by loading the ip_set kernel module and disabling firewalld on ForceNftables distros [7], unblocking Calico e2e failures across the grid.

Action items

→ Review kops 1.35+ release notes if you run dedicated APIServer topology - new --api-server-size flag is live kubernetes/kops [plan]
→ Merge kube-openapi stdlib insulation fix into your vendored version before upgrading Go toolchain past 1.27 kubernetes/kube-openapi [plan]
→ Monitor test-infra benchmark job consolidation if you have custom scalability test configs kubernetes/test-infra [monitor]

References

[1] API only CLI ↗ kubernetes/kops
[2] Fixing LB behavior when you have both APIServer and Control Plane. kubernetes/kops
[3] Adding flag to enable machine type for APIServer only. kubernetes/kops
[4] Insulate go-json-experiment from stdlib ↗ kubernetes/kube-openapi
[5] Merge pull request #616 from liggitt/insulate-stdlib kubernetes/kube-openapi
[6] Remove yaml, table, and json-pretty LIST benchmark jobs ↗ kubernetes/test-infra
[7] nodeup: load ip_set module and disable firewalld on RHEL10 ↗ kubernetes/kops

Quick answers

What shipped in Kubernetes on June 19, 2026?: Kops now lets you run dedicated API server nodes separate from control plane workers, solving a years-old load balancer problem that sent traffic to both when you only wanted one. In total, 30 commits and 17 pull requests landed.
Who contributed to Kubernetes on June 19, 2026?: 4 developers shipped this update, including cheftako, liggitt, Jefftree, and rifelpet.
What were the notable Kubernetes updates?: API only CLI, Fixing LB behavior when you have both APIServer and Control Plane, and Adding flag to enable machine type for APIServer only.

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