Bug 1300262 – When install two RHEL7.2 on one server the old one could not boot by default

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Bug 1300262 - When install two RHEL7.2 on one server the old one could not boot by default

Summary:	When install two RHEL7.2 on one server the old one could not boot by default

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	os-prober (Show other bugs)
Sub Component:
Version:	7.2
Hardware:	x86_64 Linux

Priority	unspecified Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	rmarshall
QA Contact:	Jan Ščotka
Docs Contact:	Aneta Šteflová Petrová

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2016-01-20 06:27 EST by fine.fan
Modified:	2016-11-04 00:28 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	os-prober-1.58-8
Doc Type:	Bug Fix
Doc Text:	os-prober now uses device mapper alias names in the boot loader configuration The os-prober component previously used the numeric device mapper device in the boot loader configuration. After reboot, when the installer disk image was no longer mounted, the number changed, which rendered the boot entry unusable. Consequently, when two instances of Red Hat Enterprise Linux were installed on one machine, one of them failed to boot. To fix this bug, os-prober now uses device mapper alias names instead of the direct enumerated device mapper names. Because the alias names are more stable, the boot entry works as expected in the described situation.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-11-04 00:28:57 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Screenshot zip file (158.37 KB, application/zip) 2016-01-20 06:27 EST, fine.fan	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHBA-2016:2351	normal	SHIPPED_LIVE	os-prober bug fix update	2016-11-03 09:47:58 EDT

Groups: None (edit)

Description fine.fan 2016-01-20 06:27:11 EST

Created attachment 1116586 [details]
Screenshot zip file

Description of problem:
I have install two RHEL7.2 on one server .The grub has already contain two RHEL7.2 OS (first install the rhel72-1 OS then install the rhel72-2 OS).But when trying to boot from the rhel72-1 OS it will failed to boot up.

Version-Release number of selected component (if applicable):
rhel-server-7.2-x86_64-dvd.iso

How reproducible:
Every time

Steps to Reproduce:
1.Use a bare machine to install the RHEL7.2 OS with below partation:
   sda1   500M xfs /boot
   sda2   7G   lvm   rhel-root xfs /
          2G   lvm   rhel-swap swap
2.then use the same machine to install the second RHEL7.2 OS as below partation:
   sda3   500M  xfs /boot
   sda4   1k
   sda5   7G  lvm rhel00-root xfs /
3.waiting for the installation finished
4.select first install RHEL7.2 OS to boot

Actual results:
boot failed

Expected results:
boot success

Additional info:
The solution is fix the grub list manual :
When see the grub high light the first RHEL7.2 OS then press "e" to edit it find the “root=/dev/dm-2”entry and then fix it  into "root=/dev/mapper/rhel-root" then press "Ctrl+x" the first RHEL7.2 OS could boot normal.

I just wondering why the default grub doesn't work.

Comment 8 errata-xmlrpc 2016-11-04 00:28:57 EDT

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2351.html

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