PoAn Yang created YUNIKORN-1953:
-----------------------------------
Summary: Can't use Priority directly in placeholder pods
Key: YUNIKORN-1953
URL: https://issues.apache.org/jira/browse/YUNIKORN-1953
Project: Apache YuniKorn
Issue Type: Bug
Components: shim - kubernetes
Affects Versions: 1.4.0
Reporter: PoAn Yang
Assignee: PoAn Yang
Fix For: 1.4.0
Placeholder pods can't be created in a job with non-zero value PriorityClass. I
got following error in the yunikorn-k8shim:
{noformat}
2023-09-02T07:11:57.330Z ERROR shim.cache.placeholder
cache/placeholder_manager.go:99 failed to create placeholder pod
{"error": "pods \"tg-group-low-app-low-0\" is forbidden: the integer value of
priority (-100) must not be provided in pod spec; priority admission controller
computed 0 from the given PriorityClass name"}{noformat}
We set `priority` in placeholder pods [1]. However, if Priority Admission
Controller is enabled, it prevents users from setting this field [2].
[1]
[https://github.com/apache/yunikorn-k8shim/blob/8b26c373b4b5ba1c1462cb779a3f467ee0ae6c1d/pkg/cache/placeholder.go#L124]
[2]
[https://github.com/kubernetes/kubernetes/blob/4619f7e9d9d64a0ae0b17270496ca3f7c67d24e8/staging/src/k8s.io/api/core/v1/types.go#L3469-L3475]
Following is my test YAML:
{code:java}
apiVersion: scheduling.k8s.io/v1
kind: PriorityClass
metadata:
name: yk-low
preemptionPolicy: Never
value: -100
---
apiVersion: batch/v1
kind: Job
metadata:
labels:
applicationId: app-low
name: app-low
spec:
backoffLimit: 6
completionMode: NonIndexed
completions: 1
parallelism: 1
suspend: false
template:
metadata:
annotations:
yunikorn.apache.org/task-group-name: group-low
yunikorn.apache.org/task-groups:
'[{"Name":"group-low","MinMember":1,"MinResource":{"cpu":"100m","memory":"100M"}}]'
labels:
applicationId: app-low
job-name: app-low
name: test-low-priority
spec:
containers:
- command:
- sleep
- "300"
image: alpine:latest
imagePullPolicy: IfNotPresent
name: sleepcontainer
resources:
requests:
cpu: 100m
memory: 100M
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
priorityClassName: yk-low
restartPolicy: Never
schedulerName: yunikorn
securityContext: {}
terminationGracePeriodSeconds: 1 {code}
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