Bug 1475526

Summary:	Modify the PXELinux global default provisioning template to have the additional capability to PXE boot a system to rescue mode
Product:	Red Hat Satellite	Reporter:	Ross Bram <rbram>
Component:	Provisioning Templates	Assignee:	satellite6-bugs <satellite6-bugs>
Status:	CLOSED CANTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	Unspecified	CC:	bbuckingham, jcallaha, lzap, mhulan, rbram
Target Milestone:	Unspecified	Keywords:	Triaged
Target Release:	Unused
Hardware:	x86_64
OS:	Linux
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Last Closed:	2018-01-19 14:37:51 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Ross Bram 2017-07-26 20:37:33 UTC

Description of problem:


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

Due to a power hit, one EL 7 system shows grub errors and doesn't boot.  I would like to preserve the existing partitions on this system, therefore I do not want to re-provision it.  I am requesting a modification to the Satellite server's PXELinux global default provisioning template (or create a separate rescue template) so I may PXE boot this system to rescue mode and troubleshoot the boot issue.


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Comment 2 Lukas Zapletal 2018-01-19 14:37:51 UTC

Ross,

PXELinux "local boot" template managed by Satellite directly boots from local drive. It does read MBR record and hands over to OS boot loader. In other words, it is not possible to tell which entry you want to boot. Here are the relevant bits:

https://github.com/theforeman/community-templates/blob/develop/provisioning_templates/PXELinux/pxelinux_default_local_boot.erb

https://github.com/theforeman/community-templates/blob/develop/provisioning_templates/snippet/pxelinux_chainload.erb

What you want is technically possible, but you would need to create separate partition with rescue kernel/initeramdisk and boot from that volume. In this case, this is not good candidate for shipping by default.

I am going to close your request, feel free to reopen and provide more details how technically you would like this to work.