[Bugs] [Bug 1214574] New: Snapshot-scheduling helper script errors out while running "snap_scheduler.py init"

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1214574

            Bug ID: 1214574
           Summary: Snapshot-scheduling helper script errors out while
                    running "snap_scheduler.py init"
           Product: GlusterFS
           Version: mainline
         Component: snapshot
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: dnarayan at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Created attachment 1017739
  --> https://bugzilla.redhat.com/attachment.cgi?id=1017739&action=edit
Output of df command on the machine

Description of problem:
"snap_scheduler.py init" fails with following traceback:

Traceback (most recent call last):
  File "/usr/sbin/snap_scheduler.py", line 574, in <module>
    sys.exit(main())
  File "/usr/sbin/snap_scheduler.py", line 555, in main
    ret = perform_operation(args)
  File "/usr/sbin/snap_scheduler.py", line 408, in perform_operation
    ret = initialise_scheduler()
  File "/usr/sbin/snap_scheduler.py", line 349, in initialise_scheduler
    os.rename("/tmp/crontab", GCRON_UPDATE_TASK)
OSError: [Errno 18] Invalid cross-device link


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


How reproducible:
Always

Steps to Reproduce:
1.
2.
3.

Actual results:
snap_scheduler.py init fails with traceback.

Expected results:
snapshot scheduler has to be initialized properly by running the script.

Additional info:

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