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Bug 1990369

Summary: remote worker added to cluster as localhost.localdomain
Product: OpenShift Container Platform Reporter: Victor Voronkov <vvoronko>
Component: NetworkingAssignee: Ben Nemec <bnemec>
Networking sub component: runtime-cfg QA Contact: Victor Voronkov <vvoronko>
Status: CLOSED DUPLICATE Docs Contact:
Severity: medium    
Priority: medium CC: bnemec, vpickard
Version: 4.6.zKeywords: Triaged
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Last Closed: 2021-10-14 14:40:42 UTC Type: Bug
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Description Victor Voronkov 2021-08-05 09:35:08 UTC 
Description of problem:
remote worker added to cluster as localhost.localdomain

Version-Release number of selected component (if applicable):
4.6.41

How reproducible:
Deploy OCP IPI BM regular cluster with 3 masters and 2 workers and add remote worker from different subnet

Steps to Reproduce:
1.
2.
3.

Actual results:
worker appear as localhost.localdomain while bnh shows rwn-0-0:

[kni@provisionhost-0-0 ~]$ oc get baremetalhost -n openshift-machine-api
NAME                   STATUS   PROVISIONING STATUS      CONSUMER                                  BMC                                                                                                 HARDWARE PROFILE   ONLINE   ERROR
openshift-master-0-0   OK       externally provisioned   ocp-edge-cluster-0-29dtb-master-0         redfish-virtualmedia://192.168.123.1:8000/redfish/v1/Systems/6f42c6c3-63aa-45ca-bb94-38716b92b53d                      true     
openshift-master-0-1   OK       externally provisioned   ocp-edge-cluster-0-29dtb-master-1         redfish-virtualmedia://192.168.123.1:8000/redfish/v1/Systems/b2bf4f03-10b6-4415-9c18-0827073b2056                      true     
openshift-master-0-2   OK       externally provisioned   ocp-edge-cluster-0-29dtb-master-2         redfish-virtualmedia://192.168.123.1:8000/redfish/v1/Systems/3447e792-36f7-4bc2-b252-6bbf9a06d1a9                      true     
openshift-rwn-0-0      OK       provisioned              ocp-edge-cluster-0-29dtb-worker-0-nwpqz   redfish-virtualmedia://192.168.123.1:8000/redfish/v1/Systems/4eec3688-91f4-4f04-aaf3-708a0144e50a   unknown            true     
openshift-worker-0-0   OK       provisioned              ocp-edge-cluster-0-29dtb-worker-0-26q8b   redfish-virtualmedia://192.168.123.1:8000/redfish/v1/Systems/140d43a8-c073-44b0-bbf5-cb3c81357889   unknown            true     
openshift-worker-0-1   OK       provisioned              ocp-edge-cluster-0-29dtb-worker-0-86v49   redfish-virtualmedia://192.168.123.1:8000/redfish/v1/Systems/40f4cf1e-545f-4bca-8854-750ee65d05b9   unknown            true     
[kni@provisionhost-0-0 ~]$ ^C
[kni@provisionhost-0-0 ~]$ oc get nodes -o wide
NAME                    STATUS   ROLES    AGE   VERSION           INTERNAL-IP       EXTERNAL-IP   OS-IMAGE                                                       KERNEL-VERSION                 CONTAINER-RUNTIME
localhost.localdomain   Ready    worker   17h   v1.19.0+4c3480d   192.168.128.122   <none>        Red Hat Enterprise Linux CoreOS 46.82.202107210110-0 (Ootpa)   4.18.0-193.60.2.el8_2.x86_64   cri-o://1.19.3-4.rhaos4.6.gitda07658.el8
master-0-0              Ready    master   2d    v1.19.0+4c3480d   192.168.123.112   <none>        Red Hat Enterprise Linux CoreOS 46.82.202107210110-0 (Ootpa)   4.18.0-193.60.2.el8_2.x86_64   cri-o://1.19.3-4.rhaos4.6.gitda07658.el8
master-0-1              Ready    master   2d    v1.19.0+4c3480d   192.168.123.109   <none>        Red Hat Enterprise Linux CoreOS 46.82.202107210110-0 (Ootpa)   4.18.0-193.60.2.el8_2.x86_64   cri-o://1.19.3-4.rhaos4.6.gitda07658.el8
master-0-2              Ready    master   2d    v1.19.0+4c3480d   192.168.123.137   <none>        Red Hat Enterprise Linux CoreOS 46.82.202107210110-0 (Ootpa)   4.18.0-193.60.2.el8_2.x86_64   cri-o://1.19.3-4.rhaos4.6.gitda07658.el8
worker-0-0              Ready    worker   47h   v1.19.0+4c3480d   192.168.123.135   <none>        Red Hat Enterprise Linux CoreOS 46.82.202107210110-0 (Ootpa)   4.18.0-193.60.2.el8_2.x86_64   cri-o://1.19.3-4.rhaos4.6.gitda07658.el8
worker-0-1              Ready    worker   47h   v1.19.0+4c3480d   192.168.123.130   <none>        Red Hat Enterprise Linux CoreOS 46.82.202107210110-0 (Ootpa)   4.18.0-193.60.2.el8_2.x86_64   cri-o://1.19.3-4.rhaos4.6.gitda07658.el8
Comment 1 Ben Nemec 2021-08-05 20:18:08 UTC 
After looking at this environment, I think this is probably the same as https://bugzilla.redhat.com/show_bug.cgi?id=1990369. The RWN node's DHCP record doesn't include a hostname, and there's a known race in using hostnames from rDNS right now. We're waiting on a new feature from NetworkManager to show up in our images in order to fix the problem.
Comment 2 Ben Nemec 2021-08-31 17:40:31 UTC 
I seem to have messed up the link in my previous comment. It should be https://bugzilla.redhat.com/show_bug.cgi?id=1929160.
Comment 3 Ben Nemec 2021-10-14 14:40:42 UTC 
I'm going to duplicate this while we wait for verification on the other bug. Feel free to reopen if it turns out to be a different issue.

*** This bug has been marked as a duplicate of bug 1929160 ***