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An update to my earlier reply
The bypassing of the localnode behaviour (admittedly done by specifying a
different port ) was done in a Patch
By Simon Horman in the archive for this list.
http://archive.linuxvirtualserver.org/html/lvs-users/2005-06/msg00113.html
This was a some time ago.
Simon do you have a more up to date version of this patch, that I could apply
to the kernel in say Centos 6?
Many Thanks
Dino
> On Wed, 01 Dec 2011, Joseph Mack wrote:
>
> you have to turn local node on. It's not on by default.
>
This statement confuses me because if I refer to a ip on the local node and
then run ipvsadm I always get something like:
IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler
Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP vip-eml-302 rr
-> 172.16.3.11:smtp Masq 1 0 0
-> 172.16.3.12:smtp Local 1 0 0
172.16.3.12 is a ip on the local node and always seems to get flagged as Local.
So how do I avoid local node if the masq ip is on the local node?
> > The documentation (old) says that lvs loading is quite low
>
> I have no idea what low loading is
The references that I can find don't qualify low loading either, but I would
assume that 10% resource consumption due to lvs and the rest remaining for
applications would be a reasonable assumption. If I can get it to work I would
be happy to share the performance data with the list (as long as I can get
permission from my employer). Modern machines are much more power these days.
It seems a bit wasteful to use a pair of hp dl360 g7s for a little lvs
for two mail servers that do less than 100k mail messages a day.
>
> > When I was asking about alternatives I was wondering If other
> > loadbalancing systems apart from lvs were available for Linux.
>
> don't know. Try google
I already have, I don't normally use lists, only when I've exhausted other
avenues.
>
> much better. However I don't understand what the 2ndary network is for
> and why is has the same IPs as the primary network
Ok the RIPs are all different (I sort of assumed that would be taken as given)
We have 2 VIPs on the Primary network and another two on the secondary.
VIP1 and VIP1s are taken as a pair as are VIP2 and VIP2s.
client
|
Primary Network
__________|_______
|RIP1,VIP1 |RIP2,VIP2
======== ========
= = =lvsnat=
= exim = = exim =
======== ========
|_______________|
RIP3,VIP1s RIP4,VIP2s
Secondary Network
> Joe
>The original reference to modifying lvs so that localnode is bypassed
>is in
>http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.one_box_lvs.html
>by Horms 2 Sep 2006
>the patch
>http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/files/local_nodes.patch
>This is quite old, and probably won't apply anymore. Should I enquire about it
>on lvs-devel?
Many Thanks
Dino
Dr Dean Scothern
Infrastructure
E: dean.scothern@xxxxxxxxxxxxxx
T: +44 (0)1225 474379
F: +44 (0)1225 474301
www.eduserv.org.uk
Eduserv is a company limited by guarantee (registered in England & Wales,
company number: 3763109) and a charity (charity number 1079456), whose
registered office is at Royal Mead, Railway Place, Bath, BA1 1SR.
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