[Pacemaker] Announce: Hawk (HA Web Konsole) 0.4.1

[Tim Serong]

Hi Everybody,

This is to announce version 0.4.1 of Hawk, a web-based GUI for managing 
and monitoring Pacemaker High-Availability clusters.

You can use Hawk to:

   - Monitor your cluster.
   - Perform basic operator tasks (start/stop/migrate etc).
   - Create, edit and delete resources.
   - Edit crm_config properties.
   - Create, edit and delete location, colocation, and ordering
     constraints (new in 0.4.1)

The constraint editor is accessible from the popup menu on the resources 
panel on the main status screen.  Ordering and colocation constraint 
chains are drawn with arrows between resources indicating dependencies, 
much as you see in the constraints chapter of Pacemaker Explained[1]. 
That it to say, to start A then B, you have an order constraint:

   [A]->[B]

...and to colocate B with A, you have a colocation constraint:

   [B]->[A]

Location constraints can be edited in simple form (just a resource, node 
and a score), or with a rule editor (if you need to specify roles or 
complex expressions).  Note that date expressions and some explanatory 
text are still to come here.  Any questions in the meantime, feel free 
to ask (I am particularly interested in feedback from people with large 
and/or complex sets of constraints).

As before, packages for various SUSE-based distros can be obtained from 
the network:ha-clustering and network:ha-clustering:Factory repos on 
OBS, or you can just search for Hawk on software.opensuse.org:

   http://software.opensuse.org/search?baseproject=ALL&q=Hawk

Building an RPM for Fedora/Red Hat is still just as easy as last time:

   # hg clone http://hg.clusterlabs.org/pacemaker/hawk
   # cd hawk
   # hg update hawk-0.4.1
   # make rpm

(My apologies continue for all the non-RPM-based distro users.)

Further information is available at:

   http://www.clusterlabs.org/wiki/Hawk

Please direct comments, feedback, questions, etc. to myself and/or 
(preferably) the Pacemaker mailing list.

Happy clustering,

Tim

[1] 
http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/ch-constraints.html


-- 
Tim Serong <tserong at novell.com>
Senior Clustering Engineer, OPS Engineering, Novell Inc.