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Bug 1968622

Summary: Kernel panics observed while booting RHCOS(iPXE on Legacy firmware) when using VM as provisioning node
Product: OpenShift Container Platform Reporter: Amit Chaturvedi <achaturv>
Component: Bare Metal Hardware ProvisioningAssignee: Tomas Sedovic <tsedovic>
Bare Metal Hardware Provisioning sub component: ironic QA Contact: Amit Ugol <augol>
Status: CLOSED INSUFFICIENT_DATA Docs Contact:
Severity: medium    
Priority: medium CC: beth.white, bfournie, derekh, mbagga, rpittau, tsedovic
Version: 4.7Keywords: Triaged
Target Milestone: ---Flags: rpittau: needinfo+
Target Release: 4.9.0   
Hardware: Unspecified   
OS: Unspecified   
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Clone Of: Environment:
Last Closed: 2021-08-10 14:29:16 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Amit Chaturvedi 2021-06-07 16:55:07 UTC 
Version:
OCP 4.7

Platform:

Baremetal.

Please specify:
* IPI Installation 

What happened?

During the installation of Ocp 4.7 on baremetal with ipi installation kernel getting panic with error

ERROR
~~~~~~~~~~~~~
"Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ".  This is the auto generated ipxe:  
:retry_boot
echo In inspector.ipxe
imgfree
# NOTE(dtantsur): keep inspection kernel params in [mdns]params in
# ironic-inspector-image and configuration in configure-ironic.sh
kernel --timeout 60000 http://172.20.20.60:80/images/ironic-python-agent.kernel ipa-inspection-callback-url=http://172.20.20.60:5050/v1/continue ipa-inspection-collectors=default,extra-hardware,logs systemd.journald.forward_to_console=yes BOOTIF=${mac} ipa-debug=1 ipa-inspection-dhcp-all-interfaces=1 ipa-collect-lldp=1 ipa-api-url=http://172.20.20.60:6385 initrd=ironic-python-agent.initramfs || goto retry_boot
initrd --timeout 60000 http://172.20.20.60:80/images/ironic-python-agent.initramfs || goto retry_boot



What did you expect to happen?

Nodes should boot up as expected and installation should proceed.


Anything else we need to know?

The issue is happening while trying to install on iPXE on Legacy firmware BIOS.
Comment 4 Amit Chaturvedi 2021-06-24 08:20:14 UTC 
Interim update from Customer

"we made another attempt using a bare metal node as provisioner to install OCP  and , in this case, the installation was successfully done.
It seems like in order to install a 3 node baremetal cluster, is needed another baremetal provisioner node.
So the problem is using a Vmware virtual provisioning node. I don't know why, during initramfs decompression goes in kernel panic."
Comment 5 Bob Fournier 2021-07-08 12:30:57 UTC 
From comment 4 - it works when using a baremetal provisioning node and panics when using a VM as the provisioning node - that you may be hitting memory constraints with the VM. 

Adding a NEEDINFO for the requested data from Comment 2.
Comment 7 Bob Fournier 2021-08-06 13:19:11 UTC 
Mithilesh - there's not much we can analyze without logs. Again the most likely cause was a memory issue.

Can we close this bug for now and reopen it with more data if the problem occurs again?
Comment 8 Bob Fournier 2021-08-10 14:29:16 UTC 
Closing this for now as we don't have anything to analyze. Please reopen if problem can be duplicated and logs can be provided,
Comment 9 Red Hat Bugzilla 2023-09-15 01:09:08 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days