topic linux cluster without shared storage in Operating System - Linux

linux cluster without shared storage

Paolo Gilli — Fri, 24 Jun 2005 07:33:58 GMT

For firewall service,I need to create a active/passive linux cluster with 2 nodes.
for low-cost solution, is possible do this without using shared storage? if yes, where can I found information and howto?

linux distribution will be rh as 2.1 or 3.0

Thanks
Paolo

Re: linux cluster without shared storage

Stuart Browne — Fri, 24 Jun 2005 09:04:11 GMT

What service exactally are you trying to cluster?

If it's just firewall/network gateway, then there's no clustering required. Just set up multi-path network routes on both sides, and you'll have something fun (but at some point, you'll still have one point of failure.

Or are you wanting a specific service (i.e. http/apache) to be clustered?

If it is something like that without a fully-dynamic content (i.e. files being updated regularly), then you can do non-shared-data clusters, just make sure you mirror the data from a designated 'master' periodically.

Re: linux cluster without shared storage

Ivan Ferreira — Fri, 24 Jun 2005 10:26:24 GMT

You could try heartbeat, and use RHEL only if you have the RHN suscription.

A perimeter host or firewall must be always up to date.

With heartbeat you monitor the nodes through serial and/or ethernet channels, if one node goes down, the other takes over the IP (a VIP) and start the services. So, if you use iptables, configure it on both nodes and heartbeat will start and stop the service as neccesary.

Re: linux cluster without shared storage

Paolo Gilli — Fri, 24 Jun 2005 10:40:40 GMT

Stuart,Ivan
Thankyou for suggestions.
The cluster will do routing service too.
About heartbeat, searcing on the web, I foun d that it is a part of Ultra Monkey (The Linux HA Project). So at www.UltraMonkey.org I can found the RPMs and doc. needed for the installation.
Regards
Paolo

Re: linux cluster without shared storage

Steven E. Protter — Fri, 24 Jun 2005 11:41:19 GMT

http://linux-ha.org

This and webmin will let you cluster without shared storage.

I'm using both right now. The documentation could be better, but eventually I'll have a completely working cluster.

SEP

Re: linux cluster without shared storage

Paolo Gilli — Tue, 19 Jul 2005 07:59:27 GMT

Hi SEP,
can you show me how your ha.cf file is configured?
Thankyou
Paolo

Re: linux cluster without shared storage

Donald Kok — Tue, 19 Jul 2005 23:39:27 GMT

Hi Paolo,
you can use shared storage by using drbd. This software mirrors disks on different hosts. It works well in combination with heartbeat.
Donald

Re: linux cluster without shared storage

Donald Kok — Wed, 20 Jul 2005 01:43:50 GMT

Hi Paolo.
here is my ha.cf.
Good luck
Donald