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a tidb-scheduler bug fix and emit event when scheduled failed #427

Merged
merged 2 commits into from
Apr 29, 2019
Merged

a tidb-scheduler bug fix and emit event when scheduled failed #427

merged 2 commits into from
Apr 29, 2019

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weekface
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This pr:

  • fix realAcquireLock bug: pvc must bound and its pod.spec.nodeName is not empty
  • emit event when scheduled failed
  • more nice error message:
$ kubectl describe po -n tidb demo-pd-1
...
Events:
  Type     Reason            Age                     From            Message
  ----     ------            ----                    ----            -------
  Warning  FailedScheduling  2m25s (x1484 over 12m)  tidb-scheduler  Failed filter with extender at URL http://127.0.0.1:10262/scheduler/filter, code 500
  Warning  FailedScheduling  2m21s (x1489 over 12m)  tidb-scheduler  can't scheduled to nodes: [172.16.4.159 172.16.4.160], because these pods had been scheduled to nodes: map[172.16.4.159:[demo-pd-0] 172.16.4.160:[demo-pd-2]]

@weekface
* scheduled: pvc must bound and its pod.spec.nodeName is not empty
246c482 
* emit event when scheduled failed
* more nice error message
@weekface weekface mentioned this pull request Apr 25, 2019
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@weekface weekface added the test/stability stability tests label Apr 25, 2019
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/run-e2e-tests

onlymellb
onlymellb reviewed Apr 26, 2019
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pkg/scheduler/predicates/ha.go
if err != nil {
return schedulingPVC, currentPVC, err
}
if schedulingPVC.Status.Phase != apiv1.ClaimBound || schedulingPod.Spec.NodeName == "" {
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Can you add some comments for function realAcquireLock? I feel that the logic in this function is difficult to understand

onlymellb
onlymellb approved these changes Apr 28, 2019
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LGTM

@weekface weekface merged commit 0c57dcb into pingcap:master Apr 29, 2019
@weekface weekface deleted the fix-tidb-scheduler branch April 29, 2019 03:54
This was referenced May 5, 2019
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@onlymellb onlymellb onlymellb approved these changes

@xiaojingchen xiaojingchen xiaojingchen approved these changes

@cofyc cofyc Awaiting requested review from cofyc

@LinuxGit LinuxGit Awaiting requested review from LinuxGit

@tennix tennix Awaiting requested review from tennix

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@weekface @xiaojingchen @onlymellb