[Bugs] [Bug 1763152] New: either don't allow or else throw a warning if a user tries to create a volume with replica count greater than 3

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1763152

            Bug ID: 1763152
           Summary: either don't allow or else throw a warning if a user
                    tries to create a volume with replica count greater
                    than 3
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: cli
          Severity: low
          Assignee: bugs at gluster.org
          Reporter: srakonde at redhat.com
                CC: bugs at gluster.org, nchilaka at redhat.com,
                    rhinduja at redhat.com, rhs-bugs at redhat.com,
                    storage-qa-internal at redhat.com
        Depends On: 1763129
  Target Milestone: ---
    Classification: Community



Description of problem:
===========================
currently we only support volumes of replica count 3
Any volume with replica count 2 throws a warning

however glusterfs still create a volume of replica count >3 as below example,
without any caution/warning.

[root at dhcp35-190 ~]# gluster v create rep rep 4 server:/gluster/brick1/rep2
$HOSTNAME:/gluster/brick1/rep2 server2:/gluster/brick1/rep2
server3:/gluster/brick1/rep2 
volume create: rep: success: please start the volume to access data



We must throw a warning saying that " replica count other than or greater than 
3 is not supported,"


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


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1763129
[Bug 1763129] either don't allow or else throw a warning if a user tries to
create a volume with replica count greater than 3
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