[Linux-HA] 3-node-setup

[Andrew Beekhof]

On Feb 8, 2008, at 2:48 AM, Ludwig Ruderstaller wrote:

> Hi,
>
> I'm new to the list.
> I have here a, AFAIK, uncommen setup. Sorry the whole explanation is  
> a little
> bit long, but i want to give you all information in the hope of your  
> help :-)

Having 3 nodes isn't supported when using haresources.

You need to a) upgrade to something newer than 2.0.7 and b) start  
reading http://linux-ha.org/GettingStartedV2

>
>
> All servers are connected over a backend switch and a frontendswitch  
> to the
> world.
> The Backend Network use 10.1.1.0/24
> None of the servers use iptabels or another filter mechanism.
> Sofwareversions:
> Heartbeat 2.0.7
> DRBD 8.0.8
>
> Servers:
> mysql: 10.1.1.200
> backup: 10.1.1.201
> media: 10.1.1.202
> fe1-fe4: 10.1.1.203-206
>
> "media" server is a http server for image data and the main director  
> for the
> fe? cluster.
> "mysql" server is, as you will guess, the mysql server for fe1-4
> "backup" server is the fallback for media AND mysql.
>
> from media to backup runs a DRBD
> from mysql to backup runs a DRBD
>
> if media fails backup should kick in. (geting drbd primary, firing  
> up external
> ip, firing up internal ip, starting ldirectord, firing up tinyhttpd)
> if mysql fails backup should kick in. (geting drbd primary, starting  
> mysql)
>
> I hope this was understandble :-)
>
> So the problems:
> if either mysql or media fails i get
> orf-mysql heartbeat: [32004]: ERROR: Both machines own our resources!
> orf-mysql heartbeat: [32004]: ERROR: Both machines own foreign  
> resources!
> orf-mysql heartbeat: [32004]: ERROR: Both machines own our resources!
> orf-mysql heartbeat: [32004]: ERROR: Both machines own foreign  
> resources!
>
> but the takeover still seems to work. Is my setup technicly possible ?
>
> Another slight problem i have. in normal the backup and the media  
> server dont
> have a own external ip. if media server is up heartbeat sets the  
> external ip,
> but unfortunatly i can't get him to set the default gw also. Same  
> case if
> backup server takes over. (currently i have 2 spare ips configured  
> so i can
> set the gateway in the normal way, but this is not a permanent  
> solution)
>
> i dont want to make this mail longer as needed, so you can find all  
> config
> files on http://iamjacks.net/cluster/
>
> any help would be much aprecciated
> TIA
> Ludwig
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