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removepodsviolatingtopologyspreadconstraint: implement explicit constraints

This commit is contained in:
Amir Alavi
2023-06-03 18:58:18 -04:00
parent 5f0edb5f93
commit 7f2f6f2b16
14 changed files with 254 additions and 27 deletions

View File

@@ -522,8 +522,12 @@ This strategy makes sure that pods violating [topology spread constraints](https
are evicted from nodes. Specifically, it tries to evict the minimum number of pods required to balance topology domains to within each constraint's `maxSkew`.
This strategy requires k8s version 1.18 at a minimum.
By default, this strategy only deals with hard constraints, setting parameter `includeSoftConstraints` to `true` will
include soft constraints.
By default, this strategy only includes hard constraints, you can explicitly set `constraints` as shown below to include both:
```yaml
constraints:
- DoNotSchedule
- ScheduleAnyway
```
The `topologyBalanceNodeFit` arg is used when balancing topology domains while the Default Evictor's `nodeFit` is used in pre-eviction to determine if a pod can be evicted.
```yaml
@@ -536,9 +540,9 @@ Strategy parameter `labelSelector` is not utilized when balancing topology domai
|Name|Type|
|---|---|
|`includeSoftConstraints`|bool|
|`namespaces`|(see [namespace filtering](#namespace-filtering))|
|`labelSelector`|(see [label filtering](#label-filtering))|
|`constraints`|(see [whenUnsatisfiable](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.27/#topologyspreadconstraint-v1-core))||
|`topologyBalanceNodeFit`|bool|default `true`. [node fit filtering](#node-fit-filtering) when balancing topology domains|
**Example:**
@@ -551,7 +555,8 @@ profiles:
pluginConfig:
- name: "RemovePodsViolatingTopologySpreadConstraint"
args:
includeSoftConstraints: false
constraints:
- DoNotSchedule
plugins:
balance:
enabled: