Loadbalancing with Opensolaris - or: PSARC 2008/575

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Loadbalancing with Opensolaris - or: PSARC 2008/575

Thursday, November 5. 2009

An nice addition to the networking functionality has found its way into the Opensolaris codebase: PSARC 2008/575 ILB: Integrated L3/L4 Load balancer. This code enables Opensolaris to act as a simple load balancing device. It already contains features like acting as a loadbalancer in NAT or direct-server-return-mode as well as ping/udp/tcp and scripted health checks. You will find more information about this new feature in the case log of PSARC 2008/575.

The configuration is pretty straight-forward. To configure a loadbalancing on a group of four servers you have to use this commands:

ilbadm create-servergroup -s servers=webserv1,webserv2,webserv3 webgroup
ilbadm add-server -s servers=webserv4 webgroup
ilbadm create-rule -i port=80,vip=15.192.0.0,ipversion=IPv4 \ 
	-m lbalg=hash-IP-port,type=NAT \
	-o servergroup=webgroup webrule

I think as soon as this code is available in Opensolaris, i will try to marry it with the KSSL functionality. Would be nice, to use both functions to create an SSL-offloading loadbalancer

Posted by Joerg Moellenkamp in English, Solaris, Sun/Oracle at 20:26 | Comments (12) | Trackback (1)
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Scarry, I was just looking for a DSR load balancing/failover service at work today. I did however find that our current firewall already had that built in, otherwise this maybe would have been an option

#1 Jeppe Toustrup (Homepage) on 2009-11-05 22:02 (Reply)

take a look at zeus, seems like a really competent SW loadbalancer, downloaded the virtualbox image just to give it a try and it seemed to have a competent set of features!

#2 KG on 2009-11-05 23:04 (Reply)

I know their products reasonably well, they deliver good products ...

But not everyone wants a full featured load balancing software. It for the people who just wants a simple device without further software. For the same people using similar features in Linux for example at the moment.

#2.1 Joerg M. (Homepage) on 2009-11-05 23:08 (Reply)

one big difference between zeus' offering and ILB is that ILB performs the actual packet forwarding in-kernel, and therefore avoids the dual crossing of the kernel-userland boundary that other, userland-only products have to perform *for every packet*.

btw: ILB's admin interface is abstracted into a library, so Zeus or whoever is interested could easily refactor their solution to benefit from ILB funcitonality.

#2.2 Michael Schuster on 2009-11-25 08:23 (Reply)

Gibts bei Osol die Möglichkeit von L2-basiertem Balancing?

#3 Günther on 2009-11-06 13:01 (Reply)

L2 Persistenz oder L2 Balancing durch austausch der MACs mit identischen IP auf den Interfaces ?

#3.1 Joerg Moellenkamp (Homepage) on 2009-11-06 14:00 (Reply)

Der DSR-Modus entspricht einem L2-LoadBalancer...

#3.2 Martin Seeger (Homepage) on 2010-01-28 15:30 (Reply)

question to all: to use ilb it's enough to update my 2009.06 to the 127 build? because i had a lot of troubles tryin to download the ilb source from src.opensolaris.org...

#4 giorgio on 2009-11-11 12:12 (Reply)

ILB bits will appear in build 128, so updating to 127 won't help you, I'm afraid.

#4.1 Michael Schuster on 2009-11-25 09:05 (Reply)

Yesterday I updated to Dev Build 130. I don't find ilbadm command. I can see there is a man page for ilbadm but command is not there. Perhaps it would have missed ? I did find command on my all filesystems. couldn't find anywhere.

#5 Gopi (Homepage) on 2009-12-27 15:59 (Reply)

You have to install it: pkg install SUNWilb

#5.1 Joerg Moellenkamp on 2009-12-27 21:11 (Reply)

Hi,

we're just finishing a DNS LoadBalancer Appliance based on ILB. The preliminary results
are very good. Instead of VRRP we wrote our own HA handling.

CU, Martin Seeger

#6 Martin Seeger (Homepage) on 2010-01-28 15:28 (Reply)

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