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List:       keepalived-devel
Subject:    [Keepalived-devel] Misc_dynamic
From:       "Johan Kooijman" <mail () johankooijman ! com>
Date:       2005-11-22 17:27:13
Message-ID: 000d01c5ef89$fa0d97c0$ee28c740$ () com
[Download RAW message or body]

Hi all,

The Facts:
Distro: Gentoo 
Kernel: 2.6.14-gentoo-r2
Keepalived: Keepalived v1.1.11 (11/22,2005)

Config (virtual_server part only):
------------------
virtual_server 192.168.1.100 25 {
    delay_loop 30
    lb_algo wrr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP

    real_server 10.0.28.110 25 {
        weight 1
        inhibit_on_failure
        MISC_CHECK {
                misc_path /home/dignus/cl_node110.sh
                misc_timeout 5
                misc_dynamic
        }
    }

    real_server 10.0.28.111 25 {
        weight 1
        inhibit_on_failure
        TCP_CHECK {
                connect_timeout 3
        }
    }
}
------------------

The contents of /home/dignus/cl_node110.sh are:
------------------
#!/bin/sh

exit 123;
------------------

I put in 123 to check if the misc_dynamic works. Before I start keepalived,
ipvsadm shows:

------------------
lb1 ~ # ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
------------------

After starting keepalived:
------------------
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.1.100:smtp wrr persistent 50
  -> 10.0.28.111:smtp             Route   1      0          0         
  -> 10.0.28.110:smtp             Route   1      0          0
------------------

That looks good. After the first healthcheck, I find these entries in
/var/log/messages:
------------------
Nov 22 17:24:41 lb1 Keepalived_healthcheckers: Changing weight from 1 to 109
for active service [10.0.28.110:25] of VS [192.168.1.100:25]
Nov 22 17:24:41 lb1 Keepalived_healthcheckers: IPVS: No such destination
------------------

I noticed 2 things:
1. The weight is not according to the exit code.
2. The weight is not adjusted with ipvsadm

In my opinion this is not normal behavior for the keepalived. Am I right, or
am I overlooking something?

Kind regards,
Johan Kooijman



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