mirror of https://github.com/k3s-io/k3s
4b01601a07
Automatic merge from submit-queue (batch tested with PRs 59394, 58769, 59423, 59363, 59245). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. kube-scheduler: Use default predicates/prioritizers if they are unspecified in the policy config **What this PR does / why we need it**: The scheduler has built-in default sets of predicate/prioritizer that are applied on pod scheduling. It can also take a policy config file where predicate/prioritizer and extender settings can be specified. The current behavior is that if we want to configure an extender using the policy config, we have to also provide the default predicate/prioritizer settings. Otherwise, the empty predicate/prioritizer sets will be used. This is inconvenient, and it's hard to keep the policy config up to date with the scheduler's defaults. This PR changes the scheduler to use the default predicate/prioritizer sets if they are unspecified in the policy config. But an empty list would bypass non-mandatory predicates/prioritizers. This will change the behavior of a policy config that does not specify (but not empty list) predicate/prioritizer, but it's unlike someone is using such config in practice. **Special notes for your reviewer**: I think it makes sense to have this in 1.9 as well because - It's safe, given the scope of this change and the fact that it's very unlikely that someone is using a policy config with empty predicates/prioritizers. - Compared with the risk, asking users to provide the default predicate/prioritizer sets for is error-prone and may cause other issues. **Release note**: ```release-note kube-scheduler: Use default predicates/prioritizers if they are unspecified in the policy config ``` /sig scheduling /assign @bsalamat /cc @vishh |
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