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lvmetad is now enabled in el7 builds. Seems the patch did not made it into dracut.el7 as suggested by following in the rdsosreport.txt attached to Bug 994978:
/usr/sbin/rdsosreport@35(): command -v lvm
/usr/sbin/rdsosreport@36(): lvm pvdisplay
/run/lvm/lvmetad.socket: connect failed: No such file or directory
WARNING: Failed to connect to lvmetad: No such file or directory. Falling back to internal scanning.
/run/lvm/lvmetad.socket: connect failed: No such file or directory
...
+++ This bug was initially created as a clone of Bug #811129 +++
Currently dracut uses lvm.conf as found in the system and modifies only global/locking_type setting. As there's a new feature introduced - the lvmetad daemon, dracut should disable its use as well by setting "global/use_lvmetad=0"
(patch attached).
Otherwise, there's a warning message issued:
dracut: WARNING: Failed to connect to lvmetad: No such file or directory. Falling back to internal scanning.
Verified on RHEL-7.0-20140210.0 with dracut-033-115.el7.
[root@rhevh-x3650-01-g7 ~]# lsinitrd -f /etc/lvm/lvm.conf | grep use_lvmetad
# lvmetad is used" comment that is attached to global/use_lvmetad setting.
# supported in clustered environment. If use_lvmetad=1 and locking_type=3
# If lvmetad has been running while use_lvmetad was 0, it MUST be stopped
# before changing use_lvmetad to 1 and started again afterwards.
# supported in clustered environment. If use_lvmetad=1 and locking_type=3
use_lvmetad = 0
# is triggered. This requires lvmetad (global/use_lvmetad=1) and udev
This request was resolved in Red Hat Enterprise Linux 7.0.
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