[Pacemaker] Configure simple Network Load-balancing

[David Coulson]

All the connections, from how many clients?

You might be better off using LVS for this.

David

On 11/30/12 7:15 AM, Ratko Dodevski wrote:
> Hi guys, I need some help on configuring NLB for my application 
> servers. I've installed tomcat on 4 servers and I've decided to use 
> Linux HA for Network Load Balancing, but is seems like all the 
> connections are going only to one of the servers (app-node-1). Can 
> someone tell me what I'm doing wrong? It's pretty simple config, just 
> one clone resource (IPaddr2) running on all nodes. Also, can someone 
> tell me how is NLB done? based on source IP, IP hash or... I need 
> Round Robbin NLB.
>
> app-node-1:/ # crm configure show
> node app-node-1
> node app-node-2
> node app-node-3 \
>         attributes standby="on"
> node app-node-4
> primitive tomcat_ip ocf:heartbeat:IPaddr2 \
>         params ip="X.X.X.X" cidr_netmask="24" nic="eth0" \
>         op monitor interval="30s" \
>         meta target-role="started"
> clone nlb_ip tomcat_ip \
>         meta globally-unique="true" clone-max="4" clone-node-max="1"
> property $id="cib-bootstrap-options" \
> dc-version="1.1.2-2e096a41a5f9e184a1c1537c82c6da1093698eb5" \
>         cluster-infrastructure="openais" \
>         expected-quorum-votes="4" \
>         stonith-enabled="false" \
>         no-quorum-policy="ignore" \
>         last-lrm-refresh="1333954979"
> rsc_defaults $id="rsc-options" \
>         resource-stickiness="100"
>
> ============
> Last updated: Fri Nov 23 01:57:49 2012
> Stack: openais
> Current DC: app-node-1 - partition with quorum
> Version: 1.1.2-2e096a41a5f9e184a1c1537c82c6da1093698eb5
> 4 Nodes configured, 4 expected votes
> 1 Resources configured.
> ============
>
> Online: [ app-node-1 app-node-4 app-node-2 ]
> OFFLINE: [ app-node-3 ]
>
>  Clone Set: nlb_ip (unique)
>      tomcat_ip:0        (ocf::heartbeat:IPaddr2): Started app-node-1
>      tomcat_ip:1        (ocf::heartbeat:IPaddr2): Started app-node-2
>      tomcat_ip:2        (ocf::heartbeat:IPaddr2): Started app-node-4
>      tomcat_ip:3        (ocf::heartbeat:IPaddr2): Stopped
>
>
> Thanks and regards
>
> -- 
> Ratko
>
>
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