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On Wed, 14 Oct 2009, Vincent Young wrote:
> Linode is a VPS hosting company using Xen virtual servers, and i'm
> being hosted with them at the moment.
there are minor wrinkles running LVS under Xen. Look at the
HOWTO.
>>> So i decided to use LVS-TUN.
>
> Linode has the option of deploying your environment in 4 datacenters,
> and i figured it would be good to be able to have the flexibility to
> connect outside my datacenter when the need should arise.
make sure you understand the consequences of a packet with
src_addr=VIP from one datacenter emerging from another
datacenter. It appears to be a spoofed packet.
> I'll give that a try, But the documentation I was reading on my linode
> said that my Linode only have one virtual ethernet interface -eth0, so
> that is why I needed to assign my private ip as an alias on that
> interface.
iproute2 handles this.
>>> director: cannot ping realserver
>>
>> you need to fix this. I assume this is your problem.
>
> ping stops working once I added the tunl0 device to my realserver with
> the following command:
> /sbin/ifconfig tunl0 97.107.133.234 netmask 255.255.255.255 broadcast
> 97.107.133.234
ping to the RIP (has to work) or to the VIP (won't work)?
>
>
> before I added that, I'm able to ping the real server from the
> director no problem. Is there something I should be doing to get it to
> work?
>
>
>>
>>> or telnet port 80 into realserver eth0 public ip.
>>
>> this test doesn't tell you anything if you can't ping the
>> realserver. After you can ping the realserver, you still
>> won't be able to connect to the realserver:VIP:80. Do you
>> understand why?
>
> Which is why I used a different client to do my tests. Is the reason
> because I'll just be connecting locally, and not actually go through
> the VIP?
yes
>> if so, turn off blocking martians.
>
> Is this controlled at the router level?
on the machine that's seeing the martian.
> or on the realserver? Im on a
> VPS, and dont have access to the physical machines themselves or the
> hardware like routers.
a common problem when setting up LVS. If you're doing it all
in a single Xen, then you'll be routing within the Xen too.
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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Homepage http://www.austintek.com/ It's GNU/Linux!
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