[Pacemaker] DRBD Management Console 0.7.0

[martin.braun at icw.de]

Hi Rasto,

I played around with the MC and it is really a promising integrative 
approach for managing a DRBD and Pacemaker Cluster. For now it is really 
nice for demonstration purposes like detaching the primary with failover.

What I am missing is a resource cleanup (crm resource cleanup <resource 
name>), is this function in your release plan? 

Thx,
Martin 




Rasto Levrinc <rasto.levrinc at linbit.com> wrote on 19.03.2010 11:07:39:

> [image removed] 
> 
> [Pacemaker] DRBD Management Console 0.7.0
> 
> Rasto Levrinc 
> 
> to:
> 
> drbd-mc, drbd-announce, pacemaker, linux-ha
> 
> 19.03.2010 11:09
> 
> Please respond to pacemaker
> 
> Hi,
> 
> This is the next DRBD-MC beta release 0.7.0. DRBD-MC, that is also a 
> Pacemaker GUI, is a Java application that helps to configure 
> DRBD/Pacemaker/Corosync/Heartbeat clusters. It is compatible with 
Heartbeat 
> 2.1.3 to the Pacemaker 1.0.8 with both available communication layers 
and 
> DRBD 8.
> 
> In this release resource defaults were added. This is one of the missing 

> features, that normal people would use, I think. You'll find it in next 
to 
> the global options if you cluster software supports it.
> 
> The great new feature are the different operating modes and advanced/not 

> advanced modes. Depending on the operating mode, the input fields and 
menus 
> are shown, hidden, enabled or disabled. For example an administrator 
that 
> does not configure the cluster, can quickly find what he needs, not to 
worry 
> removing or changing something he shouldn't. You can start the DRBD-MC 
with 
> maximum operating mode that is allowed for the user in the whole 
application 
> and change to the lesser modes on the fly. Of course it can be easily 
> circumvented so this is not a security feature, but...
> 
> Disabling and hiding of widgets, menus and whole panels should fit 
nicely 
> with the upcoming ACLs, as soon as they figure out how to do it.
> 
> Till then, the new operating modes make the configuration and 
administration 
> of a the cluster much easier, faster and almost enjoyable.
> 
> There are currently following "Operating Modes":
> 
> Read-Only (cmd option --ro):
> read-only access is granted, you can view the cluster, add and remove 
> clusters to and from your DRBD MC, but you cannot change anything on the 

> cluster. This is somewhat equivalent to watching crm_mon, but way more 
> informative. Additionally you can start VNC Viewer to work with Virtual 
> Machines.
> 
> Operator (--op):
> you can do the basic tasks like stop, start and migrate resources and 
put 
> nodes to and out of standby, but also resolve DRBD split-brains for 
example. 
> All configuration options are hidden. This is, what it seems, about the 
> functionality that Hawk is going to have, but without operations on DRBD 
and 
> VMs.
> 
> Administrator (--admin):
> this level of access can create, configure, reconfigure and destroy, as 
well 
> as operate the whole cluster, but many most of the options are hidden. 
This 
> is a default operating mode.
> 
> Administrator (--admin)/ Advanced:
> here are the options, that are seldom needed and/or I am not even sure 
what 
> they do.
> 
> Another but hidden operating mode is a God mode. This is useful, as the 
name 
> suggest, only for development and for testing.
> 
> http://oss.linbit.com/drbd-mc/img/drbd-mc-0.7.0.png
> 
> You can get DRBD MC here:
> 
> http://www.drbd.org/mc/management-console/
> http://oss.linbit.com/drbd-mc/DMC-0.7.0.jar
> http://oss.linbit.com/drbd-mc/drbd-mc-0.7.0.tar.gz
> 
> You can start it with help of Java Web-Start or you can download it and 
> start it with "java -Xmx512m -jar DMC-0.7.0.jar" command. Make sure you 
use 
> the Java from SUN. The openjdk seems to work fine by some time now, but 
it 
> seems to run DRBD MC much slower than the original Java.
> 
> Rasto Levrinc
> 
> Here is the changelog:
> * Removing of DRBD resources was fixed.
> * VNC viewer menu in the cluster view was fixed.
> * stonith-timeout and priority stonith attributes were added.
> * stonith_ prefix for stonith devices in their ids is used.
> * When group is stopped, it is indicated in the cluster view.
> * "master" and "slave" target-roles for master slave resources were 
added.
> * All missing meta-attributes for groups and clones were added.
> * Advisory values from status, meta-data and validate-all operations are 
not 
> used anymore.
> * Some global CRM parameters, that didn't have defaults, were fixed.
> * Different operating modes were implemented.
> * Terminal frame is started as collapsed now.
> * Parsing of operation defaults was added.
> * Resource defaults were added.
> * Metal look-and-feel is forced so that it works on Macs.
> * DRBD status after start is not delayed after start-up.
> * GUI helper perl script got a version to its file name, so that 
different 
> versions of DRBD-MC can be used at the same time on one cluster.
> * Smoother and faster start-up, when there are many resources.
> 
> -- 
> : Dipl-Ing Rastislav Levrinc
> : DRBD-MC http://www.drbd.org/mc/management-console/
> : DRBD/HA support and consulting http://www.linbit.com/
> DRBD(R) and LINBIT(R) are registered trademarks of LINBIT, Austria.
> 
> 
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