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Merge pull request #29964 from MikeSpreitzer/fix-105494

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Improve API Priority and Fairness for clients
This commit is contained in:
Kubernetes Prow Robot
2021-12-05 17:32:32 -08:00
committed by GitHub
parent 63420166a1 7122c51152
commit 1664e4e4c4
1 changed files with 6 additions and 0 deletions
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content/en/docs/concepts/cluster-administration/flow-control.md
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@@ -26,6 +26,10 @@ fair queuing technique so that, for example, a poorly-behaved
{{< glossary_tooltip text="controller" term_id="controller" >}} need not {{< glossary_tooltip text="controller" term_id="controller" >}} need not
starve others (even at the same priority level). starve others (even at the same priority level).
This feature is designed to work well with standard controllers, which
use informers and react to failures of API requests with exponential
back-off, and other clients that also work this way.
{{< caution >}} {{< caution >}}
Requests classified as "long-running" — primarily watches — are not Requests classified as "long-running" — primarily watches — are not
subject to the API Priority and Fairness filter. This is also true for subject to the API Priority and Fairness filter. This is also true for
@@ -102,6 +106,8 @@ name of the matching FlowSchema plus a _flow distinguisher_ — which
is either the requesting user, the target resource's namespace, or nothing — and the is either the requesting user, the target resource's namespace, or nothing — and the
system attempts to give approximately equal weight to requests in different system attempts to give approximately equal weight to requests in different
flows of the same priority level. flows of the same priority level.
To enable distinct handling of distinct instances, controllers that have
many instances should authenticate with distinct usernames
After classifying a request into a flow, the API Priority and Fairness After classifying a request into a flow, the API Priority and Fairness
feature then may assign the request to a queue. This assignment uses feature then may assign the request to a queue. This assignment uses