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Bug 1663940

Summary:	generated entries don't respect GRUB_CMDLINE_LINUX from /etc/default/grub
Product:	Red Hat Enterprise Linux 7	Reporter:	Martin Pitt <mpitt>
Component:	lvm2	Assignee:	Bryn M. Reeves <bmr>
lvm2 sub component:	Snapshots	QA Contact:	cluster-qe <cluster-qe>
Status:	CLOSED DEFERRED	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	agk, heinzm, jbrassow, msnitzer, prajnoha, zkabelac
Version:	7.6
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1663864	Environment:
Last Closed:	2021-02-17 16:20:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1663864
Bug Blocks:	1660923, 1660928

Description Martin Pitt 2019-01-07 10:38:34 UTC

+++ This bug was initially created as a clone of Bug #1663864 +++

Description of problem: As the subject says. This means that serial console, kdump, and other settings don't work when booting into a rollback.


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

lvm2-python-boom 7:0.9-13.el7_6.2
grub2-common-2.02-0.76.el7.noarch

How reproducible: Always

1. Create a snapshot:
   lvcreate --snapshot -n rollback1 --size 1G rhel/root
2. Create a boom entry for the rollback:
   boom create --title "update rollback test" --rootlv rhel/rollback1
3. Reboot into the snapshot

Actual results: Serial console not working, /proc/cmdline is missing all the options:

# cat /proc/cmdline
BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-57.el8.x86_64 root=/dev/rhel/rollback1 ro rd.lvm.lv=rhel/rollback1


Expected results: GRUB_CMDLINE_LINUX settings are respected, like in

# cat /proc/cmdline
BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-57.el8.x86_64 root=/dev/mapper/rhel-root ro rd_NO_PLYMOUTH crashkernel=auto resume=/dev/mapper/rhel-swap rd.lvm.lv=rhel/root console=ttyS0,115200 net.ifnames=0 biosdevname=0


Additional info:

Comment 4 Bryn M. Reeves 2021-02-17 16:20:27 UTC

There are no plans to update the boom package in Red Hat Enterprise Linux 7 at the current time. As the use of the GRUB_CMDLINE_LINUX variable in RHEL continues to develop we will track impacts on the boom package in bug 1663864.