[Bugs] [Bug 1688068] New: Proper error message needed for FUSE mount failure when /var is filled.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1688068

            Bug ID: 1688068
           Summary: Proper error message needed for FUSE mount failure
                    when /var is filled.
           Product: GlusterFS
           Version: 4.1
            Status: NEW
         Component: fuse
          Severity: low
          Priority: low
          Assignee: atumball at redhat.com
          Reporter: atumball at redhat.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community



This bug was initially created as a copy of Bug #1685406


Description of problem:
On a gluster client, if we try to mount volume when /var is filled completely
FUSE mount fails with:
################################################################################
# mount.glusterfs my-node.redhat.com:/testvol_replicated/ bug/
ERROR: failed to create logfile "/var/log/glusterfs/bug-.log" (No space left on
device)
ERROR: failed to open logfile /var/log/glusterfs/bug-.log
Mount failed. Please check the log file for more details.
################################################################################

Instead of which a proper error message should be displayed like:
################################################################################
# mount.glusterfs my-node.redhat.com:/testvol_replicated/ bug/
ERROR: failed to create logfile "/var/log/glusterfs/bug-.log" (No space left on
device)
ERROR: failed to open logfile /var/log/glusterfs/bug-.log
Mount failed as no space left on device please free disk space. 
################################################################################
As the present error message is misleading.


How reproducible:
1/1

Steps to Reproduce:
1. Create one volume of any type and start it. 
2. On the client node fill /var/log using fallocate.
3. Try to mount the volume on the client.



--- Discussions in above bug ---

> > # mount.glusterfs dhcp35-137.lab.eng.blr.redhat.com:/testvol_replicated/ bug/
> > ERROR: failed to create logfile "/var/log/glusterfs/bug-.log" (No space left on device)
> 
> 
> Doesn't the above line capture the 'issue' at hand?


In that case I would not want the error message "Mount failed. Please check the
log file for more details." to be displayed at all. Because it would create
confusion for when read by the user, as log-file creation itself failed.

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