Bug 1942628 - LB service unstable with multiple Windows nodes and pods
Summary: LB service unstable with multiple Windows nodes and pods
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Windows Containers
Version: 4.6.z
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
: 4.7.z
Assignee: Sebastian Soto
QA Contact: gaoshang
URL:
Whiteboard:
Depends On: 1905950
Blocks: 1942630
TreeView+ depends on / blocked
 
Reported: 2021-03-24 16:11 UTC by Sebastian Soto
Modified: 2021-04-16 15:48 UTC (History)
11 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1905950
: 1942630 (view as bug list)
Environment:
Last Closed: 2021-04-16 15:48:20 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Comment 1 Sebastian Soto 2021-03-24 16:15:16 UTC 
This should not be a problem on 4.7 clusters
Comment 2 gaoshang 2021-03-25 10:45:31 UTC 
This bug has been verified and passed on OCP 4.7, thanks.

Version:
OCP: 4.7.0-0.nightly-2021-03-25-045200
WMCO: 2.0.0+9cfb5c1

Steps:
1, When Windows pods land on different Windows node, check LB service works well.

# oc get nodes -owide -l kubernetes.io/os=windows
NAME            STATUS   ROLES    AGE   VERSION                       INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                         KERNEL-VERSION    CONTAINER-RUNTIME
windows-5862d   Ready    worker   34m   v1.20.0-1030+cac2421340a449   10.0.32.7     <none>        Windows Server 2019 Datacenter   10.0.17763.1817   docker://19.3.14
windows-zbfst   Ready    worker   29m   v1.20.0-1030+cac2421340a449   10.0.32.8     <none>        Windows Server 2019 Datacenter   10.0.17763.1817   docker://19.3.14

# oc get pod -owide
NAME                               READY   STATUS    RESTARTS   AGE   IP            NODE                                 NOMINATED NODE   READINESS GATES
win-webserver-549cd7495d-48snw     1/1     Running   0          20m   10.132.0.3    windows-5862d                        <none>           <none>
win-webserver-549cd7495d-6ghv6     1/1     Running   0          20m   10.132.1.2    windows-zbfst                        <none>           <none>
win-webserver-549cd7495d-6vqq5     1/1     Running   0          20m   10.132.0.4    windows-5862d                        <none>           <none>
win-webserver-549cd7495d-f9bfm     1/1     Running   0          20m   10.132.0.2    windows-5862d                        <none>           <none>
win-webserver-549cd7495d-hzvtq     1/1     Running   0          20m   10.132.1.3    windows-zbfst                        <none>           <none>


# oc get service
NAME              TYPE           CLUSTER-IP       EXTERNAL-IP     PORT(S)        AGE
win-webserver     LoadBalancer   172.30.155.201   52.230.218.37   80:32406/TCP   21m

# curl 52.230.218.37
<html><body><H1>Windows Container Web Server</H1></body></html>

# ./curlloop.sh 52.230.218.37
Attempt 1 06:43:12- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 2 06:43:12- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 3 06:43:12- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 4 06:43:12- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 5 06:43:12- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 6 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 7 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 8 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 9 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 10 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 11 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 12 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 13 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 14 06:43:13- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 15 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 16 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 17 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 18 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 19 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 20 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 21 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 22 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 23 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 24 06:43:14- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 25 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 26 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 27 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 28 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 29 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 30 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 31 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 32 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 33 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 34 06:43:15- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 35 06:43:16- infinite loops [ hit CTRL+C to stop]
<html><body><H1>Windows Container Web Server</H1></body></html>Attempt 36 06:43:16- infinite loops [ hit CTRL+C to stop]
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