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Type: Bug
Resolution: Duplicate
Priority: Major
Fix Version/s: None
Affects Version/s: 4.13.z
Component/s: Networking / ovn-kubernetes
Labels:

Severity:
Important
Regression:
No
Blocked:
False
Blocked Reason:

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Description of problem:

When running cluster-density-v2 with 2268 Iterations on a 252-node 4.13 ARO setup, the readinessProbe on SERVICE_ENDPOINT/ ROUTE_ENDPOINT starts fluctuating thus impacting the pod overall podLatency times. This podLatency increases nearly after 1800 iterations. This observation is reproducible.

ARO Instance details:
Master Type: Standard_D32s_v5
Worker Type: Standard_D8s_v5
Infra Type: Standard_E16s_v5

Enclosing some of our analysis logs:

I removed the CURL to SERVICE_ENDPOINT & it still fails on the curl to ROUTE_ENDPOINT

[root@vkommadi ~]# oc describe po client-1-68cb885d6c-6zr6m 
Name:             client-1-68cb885d6c-6zr6m
Namespace:        cluster-density-v3-206
Priority:         0
Service Account:  default
Node:             krishvoor-scale-2hfcr-worker-eastus2-5rn5d/10.0.2.184
Start Time:       Thu, 21 Dec 2023 13:53:19 +0000
Labels:           app=client
                  kube-burner-index=3
                  kube-burner-job=cluster-density-v3
                  kube-burner-runid=d49e025b-c618-404b-810d-443842200ad0
                  kube-burner-uuid=b60a4471-dfdc-4335-a21c-d728678cde4b
                  name=client-1
                  pod-template-hash=68cb885d6c
Annotations:      k8s.ovn.org/pod-networks:
                    {"default":{"ip_addresses":["10.131.128.247/23"],"mac_address":"0a:58:0a:83:80:f7","gateway_ips":["10.131.128.1"],"ip_address":"10.131.128...
                  k8s.v1.cni.cncf.io/network-status:
                    [{
                        "name": "ovn-kubernetes",
                        "interface": "eth0",
                        "ips": [
                            "10.131.128.247"
                        ],
                        "mac": "0a:58:0a:83:80:f7",
                        "default": true,
                        "dns": {}
                    }]
                  openshift.io/scc: restricted-v2
                  seccomp.security.alpha.kubernetes.io/pod: runtime/default
Status:           Running
SeccompProfile:   RuntimeDefault
IP:               10.131.128.247
IPs:
  IP:           10.131.128.247
Controlled By:  ReplicaSet/client-1-68cb885d6c
Containers:
  client-app:
    Container ID:  cri-o://67918f0700f7cb4677868e6554e4e3ddf3e05c58319b5da5144c92056621e920
    Image:         quay.io/cloud-bulldozer/curl:latest
    Image ID:      quay.io/cloud-bulldozer/curl@sha256:4311823d3576c0b7330beccbe09896ff0378c9c1c6f6974ff9064af803fed766
    Port:          <none>
    Host Port:     <none>
    Command:
      sleep
      inf
    State:          Running
      Started:      Thu, 21 Dec 2023 13:53:25 +0000
    Ready:          False
    Restart Count:  0
    Requests:
      cpu:      10m
      memory:   10Mi
    Readiness:  exec [/bin/sh -c curl --fail -sSk ${ROUTE_ENDPOINT} -o /dev/null] delay=0s timeout=5s period=10s #success=1 #failure=3
    Environment:
      ENVVAR1:           2nVT83kJY9jjZOhU5TtN29WkVGlnvKNzQpQxpvTYXSBYbjvrDqvasvBMNNJOfObavXP1btEnA6zeyVQCe4gUs0xaPWfswedWo8Vvbl4Osc6oUreJQzKwcC71Kdat2UCU3o3biVjP5I4HjB2xKxQ6uuckBaM9Hqr964oX5sGZIyFSZZn4MR49vXClOue0IZhJ0cTHO1uMHScStNtZPCG996M9rVjbRPAuEKaZitEEANQzU7DJEitmBi5Wzc
      ENVVAR2:           Jyfu0e9VV9Z5VxxnX27ysLkmPqLCuqZqTXKS4ShegYSRtYW8sjZcyQXG6lWETlNoLs4mjdAxm9zbTKBbzlkTmD6uZgi6X1B8nULQIdhjChWhDFiNcNnlpmxjCETxweqy4pOWlyuYoUT789yfjMmtT8GqmZNN6rkjZuAL2ufn77giG8dG88XXS2xvKPR0cmd37EPHeUHnitV6vnpQmAEG1AXjxXuZoBTBWkOXcUV7RdwuOd5eIKqy5MuxSs
      ENVVAR3:           u6FOE96YFomlojCYDuyuWt8YNR295FkCCfQ0jpafvoSUHOG5XoABw0iHjKh0Yi0125gWz75MRQGK9lVWFm8Twjx6VPi5xaZ6EzuDpBtwhEBqJzsBkoUnrdwPk3mFf6Ezx5maaDLjaozTXjmFbpMOqmhKdQ44cP74mylnUX3qA09T4k0DQKH8h3aSygU2xclisJ7itEH16Z5UlG5b8NZHLSTlZR9kAGBkDlWq5HrYwgwXVlYslMdJ0a9e81
      ENVVAR4:           QJDNduucelZhgOxnONZbnIMsHQuETQ1JbLOqho5wUIPDUiw0tSTxO8YUcl2hO32tIGoD25b5f3shExWNZ6JGknOXhDZkxkKZdwVaT0bnyo9CHd68foUuaorQ8PzQutNIkm7dEwjlOURpMBVK7cy1VBLw5YvNWqw1f8G3k7EBhsAZXrQ1YTQI9QQTVncp5PosMJLVpreOdqMugcr2WpUwJTna8IVcUcEmLen9y6pdE3OgxPV30rZ7GTr7bh
      ROUTE_ENDPOINT:    https://cluster-density-1-cluster-density-v2-206.apps.w1i1fsrv.eastus.aroapp.io/256.html
      SERVICE_ENDPOINT:  http://cluster-density-1/256.html
    Mounts:
      /configmap1 from configmap-1 (rw)
      /configmap2 from configmap-2 (rw)
      /configmap3 from configmap-3 (rw)
      /configmap4 from configmap-4 (rw)
      /etc/podlabels from podinfo (rw)
      /secret1 from secret-1 (rw)
      /secret2 from secret-2 (rw)
      /secret3 from secret-3 (rw)
      /secret4 from secret-4 (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-h9lrh (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             False 
  ContainersReady   False 
  PodScheduled      True 
Volumes:
  secret-1:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  cluster-density-v3-1
    Optional:    false
  secret-2:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  cluster-density-v3-2
    Optional:    false
  secret-3:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  cluster-density-v3-3
    Optional:    false
  secret-4:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  cluster-density-v3-4
    Optional:    false
  configmap-1:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      cluster-density-v3-1
    Optional:  false
  configmap-2:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      cluster-density-v3-2
    Optional:  false
  configmap-3:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      cluster-density-v3-3
    Optional:  false
  configmap-4:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      cluster-density-v3-4
    Optional:  false
  podinfo:
    Type:  DownwardAPI (a volume populated by information about the pod)
    Items:
      metadata.labels -> labels
  kube-api-access-h9lrh:
    Type:                     Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:   3607
    ConfigMapName:            kube-root-ca.crt
    ConfigMapOptional:        <nil>
    DownwardAPI:              true
    ConfigMapName:            openshift-service-ca.crt
    ConfigMapOptional:        <nil>
QoS Class:                    Burstable
Node-Selectors:               <none>
Tolerations:                  node.kubernetes.io/memory-pressure:NoSchedule op=Exists
                              node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                              node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Topology Spread Constraints:  kubernetes.io/hostname:ScheduleAnyway when max skew 1 is exceeded for selector app=client
Events:
  Type     Reason          Age                From               Message
  ----     ------          ----               ----               -------
  Normal   Scheduled       15m                default-scheduler  Successfully assigned cluster-density-v3-206/client-1-68cb885d6c-6zr6m to krishvoor-scale-2hfcr-worker-eastus2-5rn5d
  Warning  FailedMount     15m (x2 over 15m)  kubelet            MountVolume.SetUp failed for volume "configmap-2" : configmap "cluster-density-v3-2" not found
  Warning  FailedMount     15m                kubelet            MountVolume.SetUp failed for volume "secret-1" : secret "cluster-density-v3-1" not found
  Warning  FailedMount     15m (x2 over 15m)  kubelet            MountVolume.SetUp failed for volume "configmap-4" : configmap "cluster-density-v3-4" not found
  Warning  FailedMount     15m                kubelet            MountVolume.SetUp failed for volume "secret-3" : secret "cluster-density-v3-3" not found
  Warning  FailedMount     15m (x2 over 15m)  kubelet            MountVolume.SetUp failed for volume "configmap-3" : configmap "cluster-density-v3-3" not found
  Warning  FailedMount     15m                kubelet            MountVolume.SetUp failed for volume "secret-2" : secret "cluster-density-v3-2" not found
  Warning  FailedMount     15m (x2 over 15m)  kubelet            MountVolume.SetUp failed for volume "configmap-1" : configmap "cluster-density-v3-1" not found
  Warning  FailedMount     15m                kubelet            MountVolume.SetUp failed for volume "secret-4" : secret "cluster-density-v3-4" not found
  Normal   AddedInterface  15m                multus             Add eth0 [10.131.128.247/23] from ovn-kubernetes
  Normal   Pulled          15m                kubelet            Container image "quay.io/cloud-bulldozer/curl:latest" already present on machine
  Normal   Created         15m                kubelet            Created container client-app
  Normal   Started         15m                kubelet            Started container client-app
  Warning  Unhealthy       13m (x8 over 14m)  kubelet            Readiness probe failed: curl: (22) The requested URL returned error: 503
  Warning  Unhealthy       1s (x55 over 14m)  kubelet            Readiness probe failed: command timed out
[root@vkommadi ~]# curl --fail -sSk https://cluster-density-1-cluster-density-v2-206.apps.w1i1fsrv.eastus.aroapp.io/256.html
curl: (22) The requested URL returned error: 503 Service Unavailable
[root@vkommadi ~]# 
[root@vkommadi ~]# oc exec -it client-1-68cb885d6c-6zr6m bash
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
ERRO[0000] exec failed: unable to start container process: exec: "bash": executable file not found in $PATH 
command terminated with exit code 255
[root@vkommadi ~]# oc exec -it client-1-68cb885d6c-6zr6m sh
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
~ $ time curl --fail -sSk https://cluster-density-1-cluster-density-v2-206.apps.w1i1fsrv.eastus.aroapp.io/256.html
curl: (22) The requested URL returned error: 503
Command exited with non-zero status 22
real    0m 0.20s
user    0m 0.00s
sys    0m 0.00s
~ $ https://cluster-density-1-cluster-density-v2-206.apps.w1i1fsrv.eastus.aroapp.io/256.html
curl: (22) The requested URL returned error: 503
~ $

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

OCP Version: 4.13.22

HAProxy Version:
sh-4.4$ /usr/sbin/haproxy -v                      
HA-Proxy version 2.2.24-26b8015 2022/05/13 - https://haproxy.org/
Status: long-term supported branch - will stop receiving fixes around Q2 2025.
Known bugs: http://www.haproxy.org/bugs/bugs-2.2.24.html
Running on: Linux 5.14.0-284.40.1.el9_2.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Nov 1 10:30:09 EDT 2023 x86_64
sh-4.4$ 

Router Version:
sh-4.4$ /usr/bin/openshift-router version
openshift-router
majorFromGit: 
minorFromGit: 
commitFromGit: 431a6e667025931c68b4f747a224af29edf356f6
versionFromGit: 4.0.0-429-g431a6e66
gitTreeState: clean
buildDate: 2023-11-03T11:43:21Z
sh-4.4${code}
How reproducible:
{code:none}
Easily reproducible

Steps to Reproduce:

    1. Run cluster-density-v2 with 2268 namespaces on 252 nodes
    2. Check if all pods in the cluster-density-v2 are up

Actual results:

Pod's readinessprobe impacts the Pod state.

Expected results:

All the pods should be in Running state

Additional info:

OVN Tracing:
CNI Add started after  4 mins of ConfigureOVS
[root@vkommadi ~]# oc logs -n openshift-ovn-kubernetes ovnkube-node-pknwj -c ovnkube-node | grep "68cb885d6c-6zr6m"
I1221 13:53:21.187500    3188 cni.go:265] [cluster-density-v3-206/client-1-68cb885d6c-6zr6m e1fbb5e9164721427064a79cd8b3630ff50e2097f75d24cd52ad553f851462fc] ADD starting CNI request [cluster-density-v3-206/client-1-68cb885d6c-6zr6m e1fbb5e9164721427064a79cd8b3630ff50e2097f75d24cd52ad553f851462fc]
I1221 13:53:21.189502    3188 helper_linux.go:363] ConfigureOVS: namespace: cluster-density-v3-206, podName: client-1-68cb885d6c-6zr6m, network: default, NAD default, SandboxID: "e1fbb5e9164721427064a79cd8b3630ff50e2097f75d24cd52ad553f851462fc", UID: "d36f3b2b-0d15-4fa6-9fbd-acdf9088fd40", MAC: 0a:58:0a:83:80:f7, IPs: [10.131.128.247/23]
I1221 13:53:25.018680    3188 cni.go:286] [cluster-density-v3-206/client-1-68cb885d6c-6zr6m e1fbb5e9164721427064a79cd8b3630ff50e2097f75d24cd52ad553f851462fc] ADD finished CNI request [cluster-density-v3-206/client-1-68cb885d6c-6zr6m e1fbb5e9164721427064a79cd8b3630ff50e2097f75d24cd52ad553f851462fc], result "{\"interfaces\":[{\"name\":\"e1fbb5e91647214\",\"mac\":\"3e:97:b8:40:6c:6e\"},{\"name\":\"eth0\",\"mac\":\"0a:58:0a:83:80:f7\",\"sandbox\":\"/var/run/netns/b212efc5-3235-4f09-9661-d0faf583e930\"}],\"ips\":[{\"interface\":1,\"address\":\"10.131.128.247/23\",\"gateway\":\"10.131.128.1\"}],\"dns\":{}}", err <nil>
[root@vkommadi ~]#

=========================================================
=========================================================

[root@vkommadi ~]# oc logs -n openshift-ovn-kubernetes ovnkube-node-pknwj -c ovn-controller | grep "68cb885d6c-6zr6m"
2023-12-21T13:53:24.848Z|01966|binding|INFO|Claiming lport cluster-density-v3-206_client-1-68cb885d6c-6zr6m for this chassis.
2023-12-21T13:53:24.848Z|01967|binding|INFO|cluster-density-v3-206_client-1-68cb885d6c-6zr6m: Claiming 0a:58:0a:83:80:f7 10.131.128.247
2023-12-21T13:53:24.954Z|01968|binding|INFO|Setting lport cluster-density-v3-206_client-1-68cb885d6c-6zr6m ovn-installed in OVS
2023-12-21T13:53:24.954Z|01969|binding|INFO|Setting lport cluster-density-v3-206_client-1-68cb885d6c-6zr6m up in Southbound
[root@vkommadi ~]#

=========================================================
=========================================================

krvoora  ~  Desktop  Git-Stuff  benchmark-operator  oc logs router-default-9555f79fc-6br7r  | grep v3
E1221 13:43:34.545752       1 plugin.go:283] unable to find service cluster-density-v3-206/cluster-density-2: Service "cluster-density-2" not found
E1221 13:43:34.545930       1 plugin.go:283] unable to find service cluster-density-v3-206/cluster-density-2: Service "cluster-density-2" not found
E1221 13:43:34.575981       1 plugin.go:283] unable to find service cluster-density-v3-206/cluster-density-2: Service "cluster-density-2" not found
E1221 13:43:34.577266       1 plugin.go:283] unable to find service cluster-density-v3-206/cluster-density-2: Service "cluster-density-2" not found
E1221 13:44:04.585319       1 plugin.go:283] unable to find service cluster-density-v3-35/cluster-density-1: Service "cluster-density-1" not found
E1221 13:44:04.585456       1 plugin.go:283] unable to find service cluster-density-v3-35/cluster-density-1: Service "cluster-density-1" not found
krvoora  ~  Desktop  Git-Stuff  benchmark-operator 

============================================================================

duplicates

OCPBUGS-26530 [ARO] PodLatencies are impacted during c.d.v2 at 252 Nodes

Closed

Assignee:: Ben Bennett

Reporter:: Krishna Harsha Voora

QA Contact:: Anurag Saxena

Votes:: 0 Vote for this issue

Watchers:: 6 Start watching this issue

Created:: 2023/12/26 6:20 AM

Updated:: 2024/01/10 3:42 AM

Resolved:: 2024/01/09 11:06 AM

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