snapshot/scheduler: Do not enable scheduler if another scheduler is running

     Backport of http://review.gluster.org/#/c/10641/

Check if another snapshot scheduler is running before
enabling the scheduler

Also introducing a hidden option, disable_force

"snapshot_scheduler.py disable_force" will disable the
cli snapshot scheduler from any node, even though the node
has not been initialised for the scheduler, as long as the
shared storage is mounted

This option is hidden, because we don't want to encourage
users to use all commands from nodes that are not initialised.

Change-Id: I7ad941fbbab834225a36e740c61f8e740813e7c8
BUG: 1226120
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/10641
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Tested-by: NetBSD Build System
Reviewed-by: Kaushal M <kaushal@redhat.com>
(cherry picked from commit d67eb34b2a5b5e3cb926ff4c86a163148743829c)
Reviewed-on: http://review.gluster.org/10993
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Aravinda VK <avishwan@redhat.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Krishnan Parthasarathi <kparthas@redhat.com>

0 files changed, 0 insertions, 0 deletions