[lvs-users] "selective balancing" - make requests from 1.2.3.4 go to realserver_A, all others - to realserver_B

Tomasz Chmielewski tch at virtall.com
Fri Mar 7 11:47:21 GMT 2014


On Fri, 7 Mar 2014 12:15:08 +0100
Patrick Schaaf <netdev at bof.de> wrote:

> Hi Tomasz,
> 
> 2014-03-07 11:52 GMT+01:00 Tomasz Chmielewski <tch at virtall.com>:
> > I was wondering if I can use ipvsadm not only for load balancing,
> > but also for "code testing".
> 
> The key to such usage, is fwmark based LVS virtual hosts. You then use
> the iptables -t mangle PREROUTING to set firewall mark depending on
> whatever iptables matches you come up with. Additionally ipset might
> come in handy here - write one ipset based match setting your "code
> testing" fwmark, then add and delete IPs from that set as needed,
> maybe even with a nice web frontend for your developers :)

Indeed.

iptables -t mangle -I PREROUTING -s 1.2.3.4 -j ACCEPT

on the realserver does the trick :)

-- 
Tomasz Chmielewski
http://wpkg.org





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