this commit introduces a new customization on the existing PodsWithPVC
protection. this new customization allow users to make pods that refer
to a given storage class unevictable.
for example, to protect pods referring to `storage-class-0` and
`storage-class-1` this configuration can be used:
```yaml
apiVersion: "descheduler/v1alpha2"
kind: "DeschedulerPolicy"
profiles:
- name: ProfileName
pluginConfig:
- name: "DefaultEvictor"
args:
podProtections:
extraEnabled:
- PodsWithPVC
config:
PodsWithPVC:
protectedStorageClasses:
- name: storage-class-0
- name: storage-class-1
```
changes introduced by this pr:
1. the descheduler starts to observe persistent volume claims.
1. a new api field was introduced to allow per pod protection config.
1. rbac had to be adjusted (+persistentvolumeclaims).
* add ignoreNonPDBPods option
* take2
* add test
* poddisruptionbudgets are now used by defaultevictor plugin
* add poddisruptionbudgets to rbac
* review comments
* don't use GetPodPodDisruptionBudgets
* review comment, don't hide error
* update helm chart to v0.27.0
* update manifest version and docs
* fix 1.27 release version from README.md
Co-authored-by: Mike Dame <mikedame@google.com>
---------
Co-authored-by: Mike Dame <mikedame@google.com>
--help is now an CMD which means explicitly providing a command override in kubernetes is no longer required. You can now simply provide the necessary arguments
Prior to this commit the YAML manifests used to install the descheduler
Job and CronJob did not set container requests or limits. This is
considered an anti-pattern when deploying applications on k8s.
Set descheduler container resources to make it a burstable pod. This
will ensure a high quality experience for end users when deploying
descheduler into their clusters using the instructions from the README.
The values choosen for CPU/Memory are not based on any real data.
This adds a strategy to balance pod topology domains based on the scheduler's
PodTopologySpread constraints. It attempts to find the minimum number of pods
that should be sent for eviction by comparing the largest domains in a topology
with the smallest domains in that topology.
