#956 PR `merged`: Update 15_migrate_uuid_tags.sh¶

Labels: enhancement, fixed / solved / done

(unknown) opened issue at 2016-08-09 07:01:¶

Hello,
after migration fs_uuid for root partition wasn't changed in ELILO config file /etc/elilo.conf

e.g.

_image = /boot/vmlinuz-3.0.101-68-default

Don't change this comment - YaST2 identifier: Original name: linux¶

label = Linux
append = "LOCAL_BOOT=yes root=/dev/mapper/360002ac0000000000000000700015e10_part4 disk=/dev/mapper/360002ac0000000000000000700015e10 resume=/dev/mapper/360002ac0000000000000000700015e10_part5 n

osoftlockup intel_idle.max_cstate=0 processor.max_cstate=0 mce=ignore_ce idle=poll elevator=noop biosdevname=1 quiet"
initrd = /boot/initrd-3.0.101-68-default
root = /dev/disk/by-uuid/c7c47b25-30d8-42bc-8ca8-13f939b5c7b8
description = "SAP Application"_

jsmeix commented at 2016-08-09 08:52:¶

@ltomasik
I have basically no idea what you are talking about here
( in particular I do not use elilo on my test systems):

From https://github.com/rear/rear/pull/956#issue-170095691
I can only pick a few snippets

migration
ELILO
YaST2
SAP

from which I guess you use a SUSE or openSUSE system
with elilo and SAP and you used Relax-and-Recover
to somehow migrate that system from one kind of hardware
or virtual machine onto another somewhat different kind of
hardware or virtual machine or something like that.

In the end I only like to understand if your proposed change
could cause any unexpected regressions for other users.
If there are no regressions I could "just merge" it.

To understand if your proposed change could cause any
unexpected regressions for other users, I like to understand
your environment and what exactly you intend to do with
Relax-and-Recover.

(unknown) commented at 2016-08-09 10:57:¶

@jsmeix
we have following scenario:
SAP Hana, SLES 11 SP4, SAN boot, UEFI, ELILO, migration, Relax-and-Recover 1.18 / Git

e.g.
original LUN: 360002ac0000000000000000700015e10
root_partition: /dev/mapper/360002ac0000000000000000700015e10_part4
fs_uuid: c7c47b25-30d8-42bc-8ca8-13f939b5c7b8

new LUN: 360002ac0000000000000000200015e10
root_partition: /dev/mapper/360002ac0000000000000000200015e10_part4
fs_uuid: 170afd84-3e91-466c-bdd4-2cbe90c19ddc

We did backup with ReaR and tried to restore it on same hardware with different LUN (DR tests). It failed because of:

there was an unchanged original fs_uuid in /etc/elilo.conf, we fixed it with d9f76e6f
there was an unchanged original lun wwid in /etc/elilo.conf and /etc/fstab, we fixed it with
e1a704b6

Restore finished successfully after we applied above mentioned changes. Without it restore was still failing with following error.

Perl-Bootloader: 2016-08-04 20:48:31 <3> pbl-5825.2 Core::RunCommand.1614: Error: '/sbin/elilo -v' failed with exit code 1, output:
<<<<<<<<<<<<<<<<
## parsing '/etc/elilo.conf'...
elilo: Warning: couldn't determine fs_uuid -- skip SecureBoot/grub2 config!
## writing 'elilo.conf' to '/boot/efi/efi/SuSE/elilo.conf'
## copy files to '/boot/efi/efi/SuSE'
> cp --preserve=timestamps /usr/lib64/efi/elilo.efi /boot/efi/efi/SuSE
> cp --preserve=timestamps /boot/vmlinuz-3.0.101-68-default /boot/efi/efi/SuSE
> cp --preserve=timestamps /boot/initrd-3.0.101-68-default /boot/efi/efi/SuSE
## remove obsolete files based on '/boot/efi/efi/SuSE/elilo.list'
> rm /boot/efi/efi/SuSE/grub.cfg
> rm /boot/efi/efi/SuSE/shim.efi
> rm /boot/efi/efi/SuSE/grub.efi
> rm /boot/efi/efi/SuSE/MokManager.efi
elilo: 1 warning encountered.
>>>>>>>>>>>>>>>>
There was an error generating the initrd (1)
2016-08-04 20:48:31 WARNING !!!
initramfs creation (mkinitrd) failed, please check '/var/log/rear/rear-cls8923.log' to see the error
messages in detail and decide yourself, wether the system will boot or not.

2016-08-04 20:48:31 Including finalize/Linux-i386/21_install_grub.sh
2016-08-04 20:48:31 Including finalize/Linux-i386/22_install_elilo.sh
2016-08-04 20:48:31 Installing ELILO boot loader
2016-08-04 20:48:31 ERROR: Could not find elilo.efi
=== Stack trace ===
Trace 0: /bin/rear:409 main
Trace 1: /usr/share/rear/lib/recover-workflow.sh:34 WORKFLOW_recover
Trace 2: /usr/share/rear/lib/framework-functions.sh:85 SourceStage
Trace 3: /usr/share/rear/lib/framework-functions.sh:45 Source
Trace 4: /usr/share/rear/finalize/Linux-i386/22_install_elilo.sh:31 source
Trace 5: /usr/share/rear/lib/_input-output-functions.sh:150 StopIfError
Message: Could not find elilo.efi
===================
2016-08-04 20:48:31 Running exit tasks.

jsmeix commented at 2016-08-09 11:36:¶

@ltomasik
in finalize/GNU/Linux/15_migrate_lun_wwid.sh you use ">&8".
Using that file descriptor is deprecated,
see https://github.com/rear/rear/issues/887
I would like if you change that to something usual like
">/dev/null" or ">&2" to get stdout in the log as needed
cf. https://github.com/rear/rear/issues/885

I am not at all an expert in this area
but as far as I see your changes only add functionality
and do not change existing functionality
so that for me it looks safe to merge it.

Nevertheless I like @gdha to also have a look:

@gdha
could you have a look if it is o.k. when I merge it?