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Type: Bug
Resolution: Unresolved
Priority: Normal
Fix Version/s: None
Affects Version/s: None
Component/s: None
Labels:
- triaged

Regression:
None
Severity:
None

Sub-System Group:

ssg_core_kernel

Story Points:
None
Blocked:
False
Blocked Reason:

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Product Documentation Required:
None
Sprint:
None

Preliminary Testing:
None
Test Coverage:
None

Experience:
RH Private Keywords:

SFDC Cases Counter:
SFDC Cases Open:
SFDC Cases Links:

Planning:
None

Description of problem:

ovs-vswitchd process affinity doesn't get changed back to it's original affinity when deployment running guaranteed pods is deleted

Version-Release number of selected component (if applicable):

    4.17.0-0.nightly-2024-08-19-165854

How reproducible:

    Everytime

Steps to Reproduce:
1.Apply Performance profile

apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
metadata:
  creationTimestamp: "2024-08-20T21:51:00Z"
  finalizers:
  - foreground-deletion
  generation: 60
  name: performance
  resourceVersion: "432939"
  uid: ddf30617-e30c-4a5c-bf59-9c8fe306ea5d
spec:
  cpu:
    isolated: 1,3-11,13,15-23
    reserved: 0,2,12,14
  hugepages:
    defaultHugepagesSize: 1G
    pages:
    - count: 1
      node: 0
      size: 1G
    - count: 128
      node: 1
      size: 2M
  machineConfigPoolSelector:
    machineconfiguration.openshift.io/role: worker-cnf
  net:
    userLevelNetworking: false
  nodeSelector:
    node-role.kubernetes.io/worker-cnf: ""
  numa:
    topologyPolicy: single-numa-node
  realTimeKernel:
    enabled: false
  workloadHints:
    highPowerConsumption: true
    perPodPowerManagement: false
    realTime: true

2.Set cgroups version to v1

apiVersion: config.openshift.io/v1
kind: Node
metadata:
  annotations:
    include.release.openshift.io/ibm-cloud-managed: "true"
    include.release.openshift.io/self-managed-high-availability: "true"
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"config.openshift.io/v1","kind":"Node","metadata":{"annotations":{},"name":"cluster"},"spec":{"cgroupMode":"v1"}}
    release.openshift.io/create-only: "true"
  creationTimestamp: "2024-08-20T20:34:19Z"
  generation: 2
  name: cluster
  ownerReferences:
  - apiVersion: config.openshift.io/v1
    kind: ClusterVersion
    name: version
    uid: 993b68e0-7dfc-4be1-88f2-af7fc1b0567c
  resourceVersion: "43979"
  uid: 03b1845c-53fb-4f15-91c3-5a3ba71adddb
spec:
  cgroupMode: v1

3.Create a deployment as shown below:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-deployment
  labels:
    app: lbapp
    type: front-end
spec:
  template:
    metadata:
      labels:
        app: lbapp
        type: front-end
    spec:
      containers:
      - name: testlb
        image: "quay.io/mniranja/busycpus"
        command:
        - sleep
        - inf
        resources:
          limits:
            memory: "500Mi"
            cpu: "2"
      imagePullPolicy: IfNotPresent
      runtimeClassName: performance-performance
      nodeSelector:
        kubernetes.io/hostname: ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com
  replicas: 2
  selector:
    matchLabels:
       type: front-end

4. Check the affinity of ovs-vswitchd before deployment is enabled.

sh-5.1# taskset -apc $(pidof ovs-vswitchd)
pid 1497's current affinity list: 0-23
pid 1502's current affinity list: 0-23
pid 11476's current affinity list: 0-23
pid 11477's current affinity list: 0-23
pid 11478's current affinity list: 0-23
pid 11479's current affinity list: 0-23
pid 11480's current affinity list: 0-23
pid 11481's current affinity list: 0-23
pid 11482's current affinity list: 0-23
pid 11483's current affinity list: 0-23
pid 11484's current affinity list: 0-23
pid 11485's current affinity list: 0-23
pid 11486's current affinity list: 0-23
pid 11487's current affinity list: 0-23
pid 11488's current affinity list: 0-23
pid 11489's current affinity list: 0-23
pid 11490's current affinity list: 0-23
pid 11491's current affinity list: 0-23
pid 11492's current affinity list: 0-23
pid 11493's current affinity list: 0-23
pid 11494's current affinity list: 0-23
pid 11495's current affinity list: 0-23
pid 11496's current affinity list: 0-23
pid 11497's current affinity list: 0-23
pid 11498's current affinity list: 0-23
pid 11499's current affinity list: 0-23
pid 11500's current affinity list: 0-23
pid 11501's current affinity list: 0-23
pid 11502's current affinity list: 0-23
pid 11503's current affinity list: 0-23
pid 11504's current affinity list: 0-23
pid 11505's current affinity list: 0-23
pid 11506's current affinity list: 0-23

5. Apply the deployment and get the cpus used by the pods

[root@ocp-edge89 ~]# oc exec -it pods/myapp-deployment-54757d6f58-fw5km -- bash -c "cat /sys/fs/cgroup/cpuset/cpuset.cpus"
4,6
[root@ocp-edge89 ~]# oc exec -it pods/myapp-deployment-54757d6f58-hrpjg -- bash -c "cat /sys/fs/cgroup/cpuset/cpuset.cpus"
8,10

6. Verify affinity of ovs-vswitchd

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[root@ocp-edge89 ~]# oc debug node/ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com
Starting pod/ocp4173003464-worker-0libvirtlabengtlv2redhatcom-debug-5ssjr ...
To use host binaries, run `chroot /host`
Pod IP: 192.168.122.106
If you don't see a command prompt, try pressing enter.
sh-5.1# chroot /host
sh-5.1# taskset -apc $(pidof ovs-vswitchd)
pid 1497's current affinity list: 0-3,5,7,9,11-23
pid 1502's current affinity list: 0-3,5,7,9,11-23
pid 13401's current affinity list: 0-3,5,7,9,11-23
pid 13402's current affinity list: 0-3,5,7,9,11-23
pid 13403's current affinity list: 0-3,5,7,9,11-23
pid 13404's current affinity list: 0-3,5,7,9,11-23
pid 13405's current affinity list: 0-3,5,7,9,11-23
pid 13406's current affinity list: 0-3,5,7,9,11-23
pid 13407's current affinity list: 0-3,5,7,9,11-23
pid 13408's current affinity list: 0-3,5,7,9,11-23
pid 13409's current affinity list: 0-3,5,7,9,11-23
pid 13410's current affinity list: 0-3,5,7,9,11-23
pid 13411's current affinity list: 0-3,5,7,9,11-23
pid 13412's current affinity list: 0-3,5,7,9,11-23
pid 13413's current affinity list: 0-3,5,7,9,11-23
pid 13414's current affinity list: 0-3,5,7,9,11-23
pid 13415's current affinity list: 0-3,5,7,9,11-23
pid 13416's current affinity list: 0-3,5,7,9,11-23
pid 13417's current affinity list: 0-3,5,7,9,11-23
pid 13418's current affinity list: 0-3,5,7,9,11-23
pid 13419's current affinity list: 0-3,5,7,9,11-23
pid 13420's current affinity list: 0-3,5,7,9,11-23
pid 13421's current affinity list: 0-3,5,7,9,11-23
pid 13422's current affinity list: 0-3,5,7,9,11-23
pid 13423's current affinity list: 0-3,5,7,9,11-23
pid 13424's current affinity list: 0-3,5,7,9,11-23
pid 13425's current affinity list: 0-3,5,7,9,11-23
pid 13426's current affinity list: 0-3,5,7,9,11-23
pid 13427's current affinity list: 0-3,5,7,9,11-23
pid 13428's current affinity list: 0-3,5,7,9,11-23
pid 13429's current affinity list: 0-3,5,7,9,11-23

7. Delete the deployment

[root@ocp-edge89 ~]# oc delete deployment/myapp-deployment
deployment.apps "myapp-deployment" deleted

8. wait for pods to be deleted

[root@ocp-edge89 ~]# oc get pods
NAME                                READY   STATUS        RESTARTS   AGE
myapp-deployment-54757d6f58-fw5km   1/1     Terminating   0          15h
myapp-deployment-54757d6f58-hrpjg   1/1     Terminating   0          15h
[root@ocp-edge89 ~]# oc get pods
[root@ocp-edge89 ~]# oc get pods
No resources found in default namespace.

9. . Check the cpu affinity of ovs-vswitchd process

[root@ocp-edge89 ~]# oc debug node/ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com
Starting pod/ocp4173003464-worker-0libvirtlabengtlv2redhatcom-debug-pljfx ...
To use host binaries, run `chroot /host`
Pod IP: 192.168.122.106
If you don't see a command prompt, try pressing enter.
sh-5.1# chroot /host

sh-5.1# taskset -apc $(pidof ovs-vswitchd)
pid 1497's current affinity list: 0-3,5,7,9,11-23
pid 1502's current affinity list: 0-3,5,7,9,11-23
pid 13401's current affinity list: 0-3,5,7,9,11-23
pid 13402's current affinity list: 0-3,5,7,9,11-23
pid 13403's current affinity list: 0-3,5,7,9,11-23
pid 13404's current affinity list: 0-3,5,7,9,11-23
pid 13405's current affinity list: 0-3,5,7,9,11-23
pid 13406's current affinity list: 0-3,5,7,9,11-23
pid 13407's current affinity list: 0-3,5,7,9,11-23
pid 13408's current affinity list: 0-3,5,7,9,11-23
pid 13409's current affinity list: 0-3,5,7,9,11-23
pid 13410's current affinity list: 0-3,5,7,9,11-23
pid 13411's current affinity list: 0-3,5,7,9,11-23
pid 13412's current affinity list: 0-3,5,7,9,11-23
pid 13413's current affinity list: 0-3,5,7,9,11-23
pid 13414's current affinity list: 0-3,5,7,9,11-23
pid 13415's current affinity list: 0-3,5,7,9,11-23
pid 13416's current affinity list: 0-3,5,7,9,11-23
pid 13417's current affinity list: 0-3,5,7,9,11-23
pid 13418's current affinity list: 0-3,5,7,9,11-23
pid 13419's current affinity list: 0-3,5,7,9,11-23
pid 13420's current affinity list: 0-3,5,7,9,11-23
pid 13421's current affinity list: 0-3,5,7,9,11-23
pid 13422's current affinity list: 0-3,5,7,9,11-23
pid 13423's current affinity list: 0-3,5,7,9,11-23
pid 13424's current affinity list: 0-3,5,7,9,11-23
pid 13425's current affinity list: 0-3,5,7,9,11-23
pid 13426's current affinity list: 0-3,5,7,9,11-23
pid 13427's current affinity list: 0-3,5,7,9,11-23
pid 13428's current affinity list: 0-3,5,7,9,11-23
pid 13429's current affinity list: 0-3,5,7,9,11-23

10. Kubelet logs:

Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:         rpc error: code = Unknown desc = updating resources for co
ntainer "142a5a134eadd9967d26bb31c7a0ea3136eca5e88e3080d345533b1773562f57" failed: writing file `cpuset.cpus`: Permission denied
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:          : exit status 1
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:  > containerID="142a5a134eadd9967d26bb31c7a0ea3136eca5e88e3080d345
533b1773562f57"
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]: E0822 07:10:30.565531    9127 cpu_manager.go:482] "ReconcileState:
 failed to update container" err=<
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:         rpc error: code = Unknown desc = updating resources for co
ntainer "142a5a134eadd9967d26bb31c7a0ea3136eca5e88e3080d345533b1773562f57" failed: writing file `cpuset.cpus`: Permission denied
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:          : exit status 1
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:  > pod="openshift-network-operator/iptables-alerter-gmtdn" contain
erName="iptables-alerter" containerID="142a5a134eadd9967d26bb31c7a0ea3136eca5e88e3080d345533b1773562f57" cpuSet="0-23"
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]: E0822 07:10:30.569747    9127 remote_runtime.go:461] "UpdateContai
nerResources from runtime service failed" err=<
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:         rpc error: code = Unknown desc = updating resources for co
ntainer "3b22f038f882fe3e994dcd481f88f69eb79f4381d4c944eda9f649bb8879b6cd" failed: writing file `cpuset.cpus`: Permission denied
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:          : exit status 1
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:  > containerID="3b22f038f882fe3e994dcd481f88f69eb79f4381d4c944eda9
f649bb8879b6cd"
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]: E0822 07:10:30.569774    9127 cpu_manager.go:482] "ReconcileState:
 failed to update container" err=<
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:         rpc error: code = Unknown desc = updating resources for co
ntainer "3b22f038f882fe3e994dcd481f88f69eb79f4381d4c944eda9f649bb8879b6cd" failed: writing file `cpuset.cpus`: Permission denied
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:          : exit status 1
Aug 22 07:10:30 ocp4173003464-worker-0.libvirt.lab.eng.tlv2.redhat.com kubenswrapper[9127]:  > pod="openshift-monitoring/metrics-server-96b8bc9bd-z6gnw" conta
inerName="metrics-server" containerID="3b22f038f882fe3e994dcd481f88f69eb79f4381d4c944eda9f649bb8879b6cd" cpuSet="0-23"

Actual results:

cpu affinity of ovs-vswitchd should be 0-23 when the gu pods are deleted but their affinity doesn't change

Expected results:

cpu affinity of ovs-vswitchd should be 0-23 when the gu pods are deleted

Additional info:

This issue occurs only when using crun and doesn't happen when using runc 
Also if we reboot the system the affinity of ovs-vswitchd is back to what was the original prior to deploying guaranteed pods.

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crio.logs
2024/09/19 11:17 AM
918 kB
Mallapadi Niranjan
kubelet.logs
2024/09/19 11:16 AM
1.04 MB
Mallapadi Niranjan

relates to

OCPBUGS-43995 The cpu affinity of burstable pods not get updated when deleting Guaranteed pod with runc

ASSIGNED

Assignee:: Waiman Long

Reporter:: Mallapadi Niranjan

QA Contact:: Sunil Choudhary

Votes:: 0 Vote for this issue

Watchers:: 7 Start watching this issue

Created:: 2024/08/22 7:28 AM

Updated:: 2024/11/06 11:28 AM

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