[lvs-users] 2x LVS-DR director + realserver on one machine -> packet storm/looping

[Tomasz Chmielewski]

On 23.10.2011 23:02, Tomasz Chmielewski wrote:

>> When I've done a two-node environment with director and real on the same
>> box, I've always ran a private interconnect between them and routed
>> traffic over that.
>
> No such luck here!

Although, something like "vconfig add eth0 105" should get me a private 
VLAN interconnect between them, or?

So:


TCP  109.200.13.253:80 lc
   -> 10.0.0.1:80                  Route   20     0          2
   -> 10.0.0.2:80                  Local   20     0          2


And indeed it works correctly, but not always.
For the host which does not have the VIP assigned, it works every second 
connection - any ideas why?

$ curl 209.15.13.253/testpage.txt
successful
dbs2

$ curl 209.15.13.253/testpage.txt
successful
dbs1

$ curl 209.15.13.253/testpage.txt
successful
dbs2

$ curl 209.15.13.253/testpage.txt
curl: (7) couldn't connect to host

$ curl 209.15.13.253/testpage.txt
successful
dbs2

$ curl 209.15.13.253/testpage.txt
successful
dbs1

$ curl 209.15.13.253/testpage.txt
successful
dbs2

$ curl 209.15.13.253/testpage.txt
curl: (7) couldn't connect to host


When it doesn't work, tcpdump on eth0 and eth0.105 shows only incoming 
client packets; no replies from the real server.


-- 
Tomasz Chmielewski
http://wpkg.org