[Bugs] [Bug 1547931] Geo-replication is faulty on latest RHEL7.5 Snapshot2.0

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1547931

Kotresh HR <khiremat at redhat.com> changed:

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--- Doc Text *updated* ---
Cause: 
The glibc fix for CVE-2018-1000001 breaks rsync in cases where the absolute path can't be resolved for current working directory. Earlier getcwd() used to return "(unreachable)/" if absolute path can't be resolved but with the fix for CVE, it's returning ENOENT. Hence the rsync fails with this case. Since geo-rep changes the current working directory to mount point and does a lazy umount of gluster volume, rsync always fails with the fix for CVE.

Fix: 
Don't do lazy umount, instead use private mount name space. With private mount name space, mount is secured and only can be used by that geo-rep worker and exists through out the life of geo-rep worker process.

Result:
Since geo-rep uses rsync, geo-rep is broken in rsync mode with 'Faulty' status.


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