snapshot-resync-target-lvm.sh: disable devicesfile when calling lvm#59
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Nowa-Ammerlaan wants to merge 1 commit intoLINBIT:masterfrom
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snapshot-resync-target-lvm.sh: disable devicesfile when calling lvm#59Nowa-Ammerlaan wants to merge 1 commit intoLINBIT:masterfrom
Nowa-Ammerlaan wants to merge 1 commit intoLINBIT:masterfrom
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In Red Hat 9+, the devices/use_devicesfile setting is enabled by default (=1). However when the devicesfile is enabled, the devices/filter and devices/global_filter are ineffective. Running this command manually results in the following warning: > Please remove the lvm.conf filter, it is ignored with the devices This has the unfortunate side-effect of triggering the hanging lvm commands that this filter is intending to avoid. We have seen on our machines that after a reboot drbd fails to connect. It claims there is a network error while in reality the lvm commands run in this script are hanging until a timeout occurs. Disabling the devices/use_devicesfile setting (=0) in lvm.conf resolved this problem. The DRBD-9 documentation makes no mention of the devices/use_devicesfile setting. It mentions the filter and global_filter, but with the Red Hat 9+ default setting of devices/use_devicesfile=1 neither of these settings is actually effective. The documentation does mention the devices/write_cache_state setting, but this setting was removed in lvm v2.03. I therefore feel the documentation might need to be updated. This change works around the original problem we encountered by ensuring that the devices/use_devicesfile setting is disabled when running the lvm commands in the snapshot-resync-target-lvm.sh script. This works as an alternative to globally disabling the devicesfile in /etc/lvm/lvm.conf. Signed-off-by: Nowa Ammerlaan <nowa.ammerlaan@surf.nl>
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In Red Hat 9+, the
devices/use_devicesfilesetting is enabled by default (=1). However when the devicesfile is enabled, thedevices/filteranddevices/global_filterare ineffective.Running this command manually results in the following warning:
This has the unfortunate side-effect of triggering the hanging lvm commands that this filter is intending to avoid. We have seen on our machines that after a reboot drbd fails to connect. It claims there is a network error while in reality the lvm commands run in this script are hanging until a timeout occurs. Disabling the
devices/use_devicesfilesetting (=0) inlvm.confresolved this problem.The DRBD-9 documentation makes no mention of the
devices/use_devicesfilesetting. It mentions the filter and global_filter, but with the Red Hat 9+ default setting ofdevices/use_devicesfile=1neither of these settings is actually effective. The documentation does mention thedevices/write_cache_statesetting, but this setting was removed in lvm v2.03. I therefore feel the documentation might need to be updated.This change works around the original problem we encountered by ensuring that the
devices/use_devicesfilesetting is disabled when running the lvm commands in thesnapshot-resync-target-lvm.shscript. This works as an alternative to globally disabling the devicesfile in/etc/lvm/lvm.conf.