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Currently when multipath runs in the initramfs with user_friendly_names set, if it doesn't find existing mappings in /etc/multipath/bindings, it creates new
ones, just like it does once the node is in normal operation. Unfortunately, these can conflict with the user_friendly_names set in the normal filesystem's
/etc/multipath/bindings.
dracut now starts the multipathd daemon with the new -B option, which causes multipath to treat the bindings file as read-only.
Created attachment 476317[details]
Patch to add the -B option
Currently when multipath runs in the initramfs with user_friendly_names set, if it doesn't find existing mappings in /etc/multipath/bindings, it creates new ones, just like it does once the node is in normal operation. Unfortunately, these can conflict with the user_friendly_names set in the normal filesystem's /etc/multipath/bindings. The new -B option caused multipath to treat the bindings file as read-only. This option should be added to the dracut multipath scripts.
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Currently when multipath runs in the initramfs with user_friendly_names set, if it doesn't find existing mappings in /etc/multipath/bindings, it creates new
ones, just like it does once the node is in normal operation. Unfortunately, these can conflict with the user_friendly_names set in the normal filesystem's
/etc/multipath/bindings.
dracut now starts the multipathd daemon with the new -B option, which causes multipath to treat the bindings file as read-only.
Tested on build RHEL6.1-20110427.0 with dracut-004-53.el6.noarch on s390x architecture. Root filesystem was placed on a multipath zFCP LUN. The following log comes from /init.log from initramfs:
...
+ [ -e /pre-trigger/02multipathd.sh ]
+ . /pre-trigger/02multipathd.sh
+ [ -e /etc/multipath.conf ]
+ modprobe dm-multipath
+ multipathd -B
+ [ -e /pre-trigger/10plymouth-pretrigger.sh ]
+ . /pre-trigger/10plymouth-pretrigger.sh
+ getarg rd_NO_PLYMOUTH
...
multipathd was run with the -B option.
Moving to VERIFIED.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
http://rhn.redhat.com/errata/RHBA-2011-0523.html
Created attachment 476317 [details] Patch to add the -B option Currently when multipath runs in the initramfs with user_friendly_names set, if it doesn't find existing mappings in /etc/multipath/bindings, it creates new ones, just like it does once the node is in normal operation. Unfortunately, these can conflict with the user_friendly_names set in the normal filesystem's /etc/multipath/bindings. The new -B option caused multipath to treat the bindings file as read-only. This option should be added to the dracut multipath scripts.