[Bugs] [Bug 1461129] New: malformed cluster.server-quorum-ratio setting can lead to split brain

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1461129

            Bug ID: 1461129
           Summary: malformed cluster.server-quorum-ratio setting can lead
                    to split brain
           Product: GlusterFS
           Version: mainline
         Component: glusterd
          Assignee: bugs at gluster.org
          Reporter: madam at redhat.com
                CC: bugs at gluster.org



Description of problem:

cluster.server-quorum-ratio takes a percentage value.
If a value is put into it which is not a valid
percentage value, Glusterd will treat "0" nodes
as sufficient for quorum, hence possibly leading
to split brain.


Version-Release number of selected component (if applicable):

Any.

How reproducible:


Steps to Reproduce:
1. set up a volume and configure server quorum
2. modify the volfile to have an illegal string for the ratio
3. create split brain or under-quorum situation and check whether quorum is met

Actual results:

If the value is not parseable, then glusterd uses 0%
as a percentage, hence possibly leading to split brain.


Expected results:

If the value is not parseable as a percentage, then
glusterd should revert to the default of 50%+1 for quorum.

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