Configuring HA

H

hotwired007

Member
Sep 19, 2011
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Is there a walkthrough for configuiring HA/Fencing?

Ive seen this: http://pve.proxmox.com/wiki/Fencing and http://pve.proxmox.com/wiki/High_Availability_Cluster.

is thius still necessary on a PVE 2.1 install?
aptitude update && aptitude full-upgrade && aptitude install resource-agents-pve

I have 3 servers with PVE 2.1 and configured in a cluster... 2 have iDRAC6 cards the other has a Dell BMC.

My config file is below:

<?xml version="1.0"?>
<cluster name="cluster" config_version="4">
<cman keyfile="/var/lib/pve-cluster/corosync.authkey">
</cman>
<fencedevices>
<fencedevice agent="fence_drac5" cmd_prompt="admin1->" ipaddr="192.168.100.90" login="root" name="voyager" passwd="password" secure="1"/>
<fencedevice agent="fence_drac5" cmd_prompt="admin1->" ipaddr="192.168.100.92" login="root" name="bellerophon" passwd="password" secure="1"/>
<fencedevice agent="fence_ipmilan" name="challenger" lanplus="1" ipaddr="192.168.100.94" login="root" passwd="password" power_wait="5"/>
</fencedevices>
<clusternodes>
<clusternode name="voyager" nodeid="1" votes="1">
<fence>
<method name="1">
<device name="voyager"/>
</method>
</fence>
</clusternode>
<clusternode name="bellerophon" nodeid="2" votes="1">
<fence>
<method name="1">
<device name="bellerophon"/>
</method>
</fence>
</clusternode>
<clusternode name="challenger" nodeid="3" votes="1">
<fence>
<method name="1">
<device name="challenger"/>
</method>
</fence>
</clusternode>
</clusternodes>
<rm>
<service autostart="1" exclusive="0" name="TestIP" recovery="relocate">
<ip address="192.168.7.180"/>
</service>
</rm>
</cluster>

I dont understand what the <rm> section is for...
 
the wiki pages are still valid, yes.

in the rm section you specify the resources. the TestIP service is just an example. if you add a VM/CT via GUI (see video on our youtube) you will see entries here.
 
I've now got the config loaded, trying to test it... according to this: http://pve.proxmox.com/wiki/Fencing#Test_fencing

Im using the commands:
fence_ipmilan -l root -p password -a 192.168.100.94 -o status -v
and
fence_drac5 -l root -p f3nc3! -a 192.168.100.92 -o status -v

but i'm getting the following errors:

root@voyager:/# fence_ipmilan -l root -p f3nc3! -a 192.168.100.94 -o status -v
ipmilan: ipmitool not found!
failed: Failed to initialize

root@voyager:/# fence_drac5 -l root -p password -a 192.168.100.92 -o status -v
Unable to connect/login to fencing device

any ideas what im doing wrong?
 
install ipmitool via apt?
 
im assuming this will need installing on all the servers in the cluster? (it works perfectly) -goin to use the ipmi commands instead of the drac - seems to work just as well :D
 
I don't want to hijack this thread, but it has been two weeks since the last response and my question is in line with the original post. Is a fencing device required for HA? And by device, I mean a separate stand-alone device. Is there no way to setup HA without a separate fencing device?
 
Last edited by a moderator:
jerim said:
I don't want to hijack this thread, but it has been two weeks since the last response and my question is in line with the original post. Is a fencing device required for HA? And by device, I mean a separate stand-alone device. Is there no way to setup HA without a separate fencing device?
Click to expand...

Hi Jerim, i spent a long time trying to find a way of getting some of my old PCs into a HA cluster, if you have an external managed PDU, you could use that or most servers that have either BMC or ILO will accept IPMI commands for Power On/Off/Reset.
 
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