Re: Using LVS to forward HTTP from port 80 to servers running on port 81

["Travis Melhiser" <tmelhiser@xxxxxxxxxxx>]

I'm using ldirectord here as well.

Our ldirectord.conf file looks like this:
-------------------------------------------

checktimeout=10
checkinterval=2
autoreload=yes
logfile="local0"
quiescent=yes

virtual=192.168.1.99:80
       real=192.168.1.100:81 masq
       real=192.168.1.101:81 masq
       fallback=127.0.0.1:80 gate
       request="/heartbeat/index.html"
       receive="Alive"
       scheduler=rr
       service=http
       protocol=tcp
       checktype=negotiate
-------------------------------------------------

Output from ipvsadm after ldirector is started:

ipvsadm -L -n
-------------------------------------------------
Prot LocalAddress:Port Scheduler Flags
 -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  147.26.119.99:80 rr
 -> 147.26.119.215:81            Masq    1      0          0
 -> 147.26.119.164:81            Masq    1      0          0

-------------------------------------------------


However, I cannot reach the web server via the VIP.

-Travis

> From: Lloyd Brown <somewhere_or_other@xxxxxxx>
> Reply-To: "LinuxVirtualServer.org users mailing list." 
> <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
> To: "LinuxVirtualServer.org users mailing list." 
> <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
> Subject: Re: Using LVS to forward HTTP from port 80 to servers running on 
> port 81
> Date: Thu, 13 Jul 2006 15:33:00 -0600
>
> I think you can just specify the source and destination ports when you
> add the services; iptables isn't really necessary.  So, basically in the
> man page for ipvsadm, where it says "service-address", you'd put your
> external hostname/IP address followed by a port, something like this:
>
> external-server:80
>
> Similarly, when you specify the "server-address" (meaning the
> realserver), you just append a ":81" to the hostname or IP.
>
> So, to associate "server1" on port 81 as a realserver under "external"
> on port 80, using LVS-NAT with a weight of 1, you'd try something like
> this (someone should check my syntax here):
>
> "ipvsadm -a -t external:80 -r server1:81 -m -w 1"
>
> I'm not sure if this will be helpful, but we use ldirectord at my work,
> and so your configuration would be something like this, in this
> situation (assuming LVS-NAT & weight of 1 again):
>
> ...
> virtual=external:80
>         real=server1:81 masq 1
>         real=server2:81 masq 1
>         real=server3:81 masq 1
> ... (etc)
>
>
> Hope this helps,
> Lloyd Brown
>
>
> Travis Melhiser wrote:
> > I'm pretty new to LVS and can't seem to find the right configuration or
> > the right documentation to get my environment set up.
> >
> > I would like to have requests come to the LVS server on port 80 an then
> > have the LVS server forward these requests to the machines in the
> > cluster running the web servers on port 81.
> >
> > Does anyone have an example of how to set this up?
> >
> > Thanks in advance,
> >
> > -T
> >
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