Jim Gauld 45d5e92488 Modify kube-apiserver cpu resource limits and readiness probes
This refactors the existing Kubernetes patch
kubeadm-create-platform-pods-with-zero-CPU-resources.patch.
This now modifies kube-apiserver pod to be burstable, and to
have relaxed Readiness probe settings.

This specifies CPU limit of 1 for kube-apiserver pod so that it is
treated as a burstable QoS. This gives a boost of cgroup CPUShares
since the burstable cgroup parent has significantly more CPUShares
than best-effort on typical systems. This improves kube-apiserver
API responsiveness.

This increases kube-apiserver Readiness probe periodSeconds to 10
based on WRS/SS joint recommendation for minimum probe settings.
This reduces likelihood of kube-apiserver probe failure and
subsequent pod-restart under servere load. This also reduces CPU
demand.

Partial-Bug: 2084714

TEST PLAN:
- PASS: AIO-SX: Fresh install with each k8s version
        v1.24.4, 1.25.3, 1.26.1, 1.27.5, 1.28.4, 1.29.2,
        verify kube-apiserver pod is burstable QoS and
        has Readiness probe periodSeconds 10
  e.g.,
  kubectl get pod -n kube-system kube-apisever-controller-0 -oyaml
  sudo kube-cpusets

- PASS: AIO-SX: orchestrated K8S upgrade from 1.24.4 to 1.29.2

Change-Id: Ic327b6c176c3a98c16afd14e6bc001315d7cbdc0
Signed-off-by: Jim Gauld <James.Gauld@windriver.com>
2024-11-08 16:05:32 -05:00
2024-11-04 05:37:08 -05:00
2023-08-29 16:52:04 -03:00
2024-05-01 16:39:19 -04:00
2024-05-01 16:39:19 -04:00
2019-01-08 11:42:04 -05:00
2019-04-19 19:52:31 +00:00
2023-09-06 17:54:55 -03:00
2021-09-09 19:05:36 +03:00
2018-05-31 07:36:35 -07:00

integ

StarlingX Integration

Description
StarlingX Integration and packaging
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