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fix PodGroup being incorrectly deleted due to frequent creation and deletion of pods #3375

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merged 1 commit into from
Mar 29, 2024
Merged

fix PodGroup being incorrectly deleted due to frequent creation and deletion of pods #3375

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1 change: 1 addition & 0 deletions pkg/controllers/cache/cache.go
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@ import (
"k8s.io/klog/v2"

"volcano.sh/apis/pkg/apis/batch/v1alpha1"

"volcano.sh/volcano/pkg/controllers/apis"
)

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4 changes: 3 additions & 1 deletion pkg/scheduler/api/job_info.go
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Expand Up @@ -296,7 +296,8 @@ type NodeResourceMap map[string]*Resource

// JobInfo will have all info of a Job
type JobInfo struct {
UID JobID
UID JobID
PgUID types.UID

Name string
Namespace string
Expand Down Expand Up @@ -396,6 +397,7 @@ func (ji *JobInfo) SetPodGroup(pg *PodGroup) {
}
ji.TaskMinAvailableTotal = taskMinAvailableTotal

ji.PgUID = pg.UID
ji.PodGroup = pg
}

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17 changes: 14 additions & 3 deletions pkg/scheduler/cache/cache.go
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Expand Up @@ -1027,9 +1027,20 @@ func (sc *SchedulerCache) processCleanupJob() {
defer sc.Mutex.Unlock()

if schedulingapi.JobTerminated(job) {
delete(sc.Jobs, job.UID)
metrics.DeleteJobMetrics(job.Name, string(job.Queue), job.Namespace)
klog.V(3).Infof("Job <%v:%v/%v> was deleted.", job.UID, job.Namespace, job.Name)
oldJob, found := sc.Jobs[job.UID]
if !found {
klog.V(3).Infof("Failed to find Job <%v:%v/%v>, ignore it", job.UID, job.Namespace, job.Name)
sc.DeletedJobs.Forget(obj)
return
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Should obj be discarded here to avoid infinite retries?

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done

}
newPgVersion := oldJob.PgUID
oldPgVersion := job.PgUID
klog.V(5).Infof("Just add pguid:%v, try to delete pguid:%v", newPgVersion, oldPgVersion)
if oldPgVersion == newPgVersion {
delete(sc.Jobs, job.UID)
metrics.DeleteJobMetrics(job.Name, string(job.Queue), job.Namespace)
klog.V(3).Infof("Job <%v:%v/%v> was deleted.", job.UID, job.Namespace, job.Name)
}
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If oldPgVersion is not equal to newPgVersion, the current obj should also be discarded. Otherwise, DeletedJobs will be retried infinitely. In addition, DeletedJobs may be full after a long time.

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Forget and Done method can guarantee old key be discarded.

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done

sc.DeletedJobs.Forget(obj)
} else {
// Retry
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