[Bugs] [Bug 1445569] New: Provide a correct way to save the statedump generated by gfapi application

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1445569

            Bug ID: 1445569
           Summary: Provide a correct way to save the statedump generated
                    by gfapi application
           Product: GlusterFS
           Version: mainline
         Component: core
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: sasundar at redhat.com
                CC: bugs at gluster.org



Description of problem:
-----------------------
QEMU uses native glusterfs driver ( which uses libgfapi ) to provides VM
ability to  access to the disks that resides on gluster volume 

When generating statedump of gfapi application (QEMU), QEMU doesn't have
permission to write to statedump path ( /var/run/gluster ) and doesn't
generates statedump. Only the applications that runs with 'root' privilege
could write to the directory  - /var/run/gluster

There should be a proper way for applications that doesn't have root privilege
to write to /var/run/gluster

Version-Release number of selected component (if applicable):
-------------------------------------------------------------
mainline
3.10
3.8

How reproducible:
------------------
Always

Steps to Reproduce:
--------------------
1. Create a VM that runs with disk accessed using QEMU's native driver for
glusterfs (gfapi)

2. Trigger statedump from gluster node
# gluster volume statedump <vol> client <hypervisor-IP/FQDN>:<QEMU-PID>

Actual results:
---------------
No statedump dumped by QEMU process under /var/run/gluster
QEMU user doesn't have privilege to write to /var/run/gluster

Expected results:
-----------------
statedump available under /var/run/gluster

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