[ClusterLabs] Location constraints for fencing resources?

Dan Swartzendruber dswartz at druber.com
Mon Sep 12 20:43:58 EDT 2016

On 2016-09-12 10:48, Dan Swartzendruber wrote:
> Posting this as a separate thread from my fence_apc one.  As I said in
> that thread, I created two fence_apc agents, one to fence node A and
> one to fence node B.  Each was configured using a static pcmk node
> mapping, and constrained to only run on the other node.  In the
> process of testing this, I discovered a bug (feature?) in the LCMC GUI
> I am using to manage the cluster.  To wit: when I click on a fence
> object, it never seems to fetch the resource constraints (e.g. they
> show in the GUI as "nothing selected"), so if I changes something (say
> the power_wait timeout) and then click "Apply", the location
> constraints are deleted from that fencing resource.  I also noticed
> that if I connect to port 2224 (pcsd), regular resources show me the
> location constraints, whereas fence resources don't, which is making
> me wonder if this is not supported?  I'm thinking I can set up a
> pcmk_host_map to tell it which APC outlet manages node A and which
> manages node B, in which case I can just use one fence_apc resource
> with a dynamic pcmk host list?  Thanks!

Okay, this *seems* to work.  e.g. pcmk_host_list has the two hosts.  
pmck_host_map says nas1:8;nas2:2.  The fencing agent was running on 
nas2.  I logged in to nas2 and did 'systemctl stop network'.  pacemaker 
moved the fencing resource to nas1, then power-cycled nas2.  Looking 

More information about the Users mailing list