[CentOS] Two sets of Heartbeat HTTPD clusters on same subnet

Martin Suehowicz msuehowicz at rubiconproject.com
Wed Apr 1 18:47:20 UTC 2009


Think here is a faq somewhere on the heartbeat website that recommended
using multicast and 2 different ports. Perhaps you could just use 2
diffent udp ports though. Have a look at the halinux faq.

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
Behalf Of Fabian Arrotin
Sent: Wednesday, April 01, 2009 10:41 AM
To: CentOS mailing list
Subject: Re: [CentOS] Two sets of Heartbeat HTTPD clusters on same
subnet

Devraj Mukherjee wrote:
> Hi all,
> 
> I am new to Hearbeat so please be kind :) I also posted this on
> Linux-HA lists with no responses so I posted it here.
> 
> I have successfully configure two machines to use heartbeat to cluster
> httpd. The two nodes are called etk-1 and etk-2. I am trying to
> configure another two machines to act as a separate cluster (on the
> same IP subnet). These two nodes are called radu-1 and radu-2.
> 
> Obviously being a broadcast protocol radu-1 and radu-2 get these
> messages from etk-1 and I can't seem to get radu-1 and radu-2 to
> cluster (mostly probably because they are not getting the messages
> from the right nodes).
> 
> Should I just change the name of the test, if I do that I get heaps of
> WARNING log messages.
> 
> Is it possible to have two sets of clusters in the one IP subnet?
> 
> If yes what do I have to change so these clusters don't send messages
> to the wrong nodes.
> 
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: process_status_message:
> bad node [etk-1] in message
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG: Dumping message with
10 fields
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[0] : [t=NS_ackmsg]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[1] : [dest= etk-2]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[2] : [ackseq=1a9601]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[3] :
> [(1)destuuid=0xdf38de8(37 28)]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[4] : [src= etk-1]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[5] :
> [(1)srcuuid=0xdf39248(36 27)]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[6] : [hg=499a2a65]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[7] : [ts=49cfb452]
> heartbeat[3745]: 2009/03/30_04:48:02 ERROR: MSG[8] : [ttl=3]
> 
> 

I suppose your /etc/ha.d/authkeys files are configured correctly (and 
not configured to use the same 'secret' for both clusters)
You can change the port used by the second cluster , or even better 
(what i do usually) broadcast in a separate vlan for the heartbeat 
signal (you don't broadcast to the production network that way, so more 
efficient)


-- 
--
Fabian Arrotin
  idea=`grep -i clue /dev/brain`
  test -z "$idea" && echo "sorry, init 6 in progress" || sh ./answer.sh
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