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Add a note CPU change handling in CPU manager. (#9671) 

This relates to PR https://github.com/kubernetes/kubernetes/pull/66718
which validates that CPU manager state and current set CPUs are in sync.
pull/8803/merge
Ismo Puustinen 2018-08-01 01:09:39 +03:00 committed by k8s-ci-robot
parent 1b444aff9f
commit 240e91844e
1 changed files with 7 additions and 0 deletions
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content/en/docs/tasks/administer-cluster/cpu-management-policies.md
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@ -84,6 +84,13 @@ using the [cpuset cgroup controller](https://www.kernel.org/doc/Documentation/cg
exclusive allocations across Kubelet restarts.
{{< /note >}}
{{< note >}}
**Note:** CPU Manager doesn't support offlining and onlining of
CPUs at runtime. Also, if the set of online CPUs changes on the node,
the node must be drained and CPU manager manually reset by deleting the
state file `cpu_manager_state` in the kubelet root directory.
{{< /note >}}
This policy manages a shared pool of CPUs that initially contains all CPUs in the
node. The amount of exclusively allocatable CPUs is equal to the total
number of CPUs in the node minus any CPU reservations by the kubelet `--kube-reserved` or