[Keepalived-devel] IPVS: No such destination

[Ruben v. d. Z. <ru...@ar...>]

Below a part of the keepalived config file.

virtual_server 123.123.123.123 80 {
    delay_loop 6
    lb_algo wlc
    lb_kind DR
    protocol TCP

    real_server 123.123.123.124 80 {
        MISC_CHECK {
                misc_path /tmp/check.pl
                misc_timeout 1
                misc_dynamic
        }
    }
}


/tmp/check.pl:
#!/usr/bin/perl

exit 100;

Every once or twice the weight gets adjusted correctly:
Feb  9 16:43:43 loadbalancer2 Keepalived_healthcheckers: Changing weight 
from 248 to 198 for inactive service [123.123.123.124:80] of VS 
[123.123.123.123:80]

Most of the time the weight isn't adjusted and I see the following error 
in the logs:
Feb  9 16:44:13 loadbalancer2 Keepalived_healthcheckers: IPVS: No such 
destination

It looks like keepalived is able to adjust the weight when (re)adding a 
server to ipvsadm, but is unable to change it?


This is not the only problem, I also get A LOT of these errors:
Feb  9 16:55:47 loadbalancer2 Keepalived_healthcheckers: TCP connection 
to [123.123.123.124:80] failed !!!
Feb  9 16:55:47 loadbalancer2 Keepalived_healthcheckers: Removing 
service [123.123.123.124:80] from VS [123.123.123.123:80]
Feb  9 16:55:47 loadbalancer2 Keepalived_healthcheckers: TCP connection 
to [123.123.123.124:80] failed !!!
Feb  9 16:55:47 loadbalancer2 Keepalived_healthcheckers: Removing 
service [123.123.123.124:80] from VS [123.123.123.123:80]
Feb  9 16:55:47 loadbalancer2 Keepalived_healthcheckers: TCP connection 
to [123.123.123.124:80] failed !!!
Feb  9 16:55:47 loadbalancer2 Keepalived_healthcheckers: Removing 
service [123.123.123.124:80] from VS [123.123.123.123:80]

When I run wget in a loop, eg:
while true; do
  wget --output-document=/dev/null http://123.123.123.124/
done

I don't see a single hickup or a failing connection...

You guys have any idea why keepalived is doing this?

Kernel version: Linux loadbalancer2 2.6.14-gentoo-r5
Keepalived version: Keepalived v1.1.11 (09/06,2005)