[pve-devel] ha cluster with dell servers and drac fencing config + some remarks

Alexandre DERUMIER aderumier at odiso.com
Sat Jan 14 14:39:40 CET 2012


Hi, I have finished to test ha cluster with dell servers and drac card as fencing devices.
It's working great (and it's easy) !

Fencing works with drac card (tested with drac5, but it must work with drac6 with same syntax), through ssh.(enabled by default on drac card)

Here the config. 


  <fencedevices>
    <fencedevice agent="fence_drac5" ipaddr="X.X.X.X" login="root" name="node1-drac" passwd="XXXX" secure="1"/>
    <fencedevice agent="fence_drac5" ipaddr="X.X.X.X" login="root" name="node2-drac" passwd="XXXX" secure="1"/>
    <fencedevice agent="fence_drac5" ipaddr="X.X.X.X" login="root" name="node3-drac" passwd="XXXX" secure="1"/>
  </fencedevices>
 <clusternodes>
    <clusternode name="node1" nodeid="1" votes="1">
      <fence>
       <method name="1">
        <device name="node1-drac"/>
       </method>
      </fence>
    </clusternode>
    <clusternode name="node2" nodeid="2" votes="1">
      <fence>
       <method name="1">
        <device name="node2-drac"/>
       </method>
      </fence>
    </clusternode>
   <clusternode name="node3" nodeid="3" votes="1">
      <fence>
       <method name="1">
        <device name="node3-drac"/>
       </method>
      </fence>
    </clusternode>
  </clusternodes>




Some remarks about HA :

1)

It would by great to fence manually a dead node with pve-manager, if something goes wrong with fencing device or for users without fencing devices.
I can be done with command : "fence_ack_manual deadnodename"

So maybe add a right click option on a dead node,to manually fence it.


2)

If I stop manually a vm managed by ha. (for maintenance by exemple, or maybe if don't need to have it started all the day), the node is restarted by HA automatically. I could be great if we could really stop it without remove the vm from ha management.


3)
Not related to HA, but if a node goes down, we can't restart or move the vms manually on another node (with pve-manager).




 
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