Reg. Health Check Monitoring with MISC_CHECK in Keepalived

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Hi,

I want to monitor our application health by using the MISC_CHECK
configuration in keepalived. I have written a test python script f.py that
returns 0 if the application health is good (a file exists) and it returns
1 if the application health is bad (a file does not exists). However, the
keepalived is not initiating the failover to the backup server even in case
of script returning 1.

I have configured the virtual IP address as follows in keepalived.conf:
-----------------

virtual_server 10.102.10.30 45654 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP

    real_server 10.102.10.29 45654 {
        weight 3
        MISC_CHECK {
                misc_path /root/test/f.py
        }
    }

    real_server 10.102.10.76 45654 {
        weight 3
        MISC_CHECK {
                misc_path /root/test/f.py
        }
    }
    connect_timeout 2
    nb_get_retry 2
    delay_before_retry 1
}

Do I need to do any additional configuration in keepalived.conf?

The failover happens as expected when "ifdown eth1" and "ifup eth1" are
executed on the master server.

Regards,
  --Vasulu S

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Hi,
<br>
<br>I want to monitor our application health by using the MISC_CHECK=20
configuration in keepalived. I have written a test python script f.py=20
that returns 0 if the application health is good (a file exists) and it=20
returns 1 if the application health is bad (a file does not exists).=20
However, the keepalived is not initiating the failover to the backup=20
server even in case of script returning 1.
<br>
<br>I have configured the virtual IP address as follows in keepalived.conf:
<br>-----------------
<br>
<br>virtual_server 10.102.10.30 45654 {
<br>=A0=A0=A0 delay_loop 3
<br>=A0=A0=A0 lb_algo rr
<br>=A0=A0=A0 lb_kind NAT
<br>=A0=A0=A0 nat_mask 255.255.255.0
<br>=A0=A0=A0 persistence_timeout 50
<br>=A0=A0=A0 protocol TCP
<br>
<br>=A0=A0=A0 real_server 10.102.10.29 45654 {
<br>=A0=A0=A0=A0=A0=A0=A0 weight 3
<br>=A0=A0=A0=A0=A0=A0=A0 MISC_CHECK {
<br>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 misc_path /root/test/f.py
<br>=A0=A0=A0=A0=A0=A0=A0 }
<br>=A0=A0=A0 }
<br>
<br>=A0=A0=A0 real_server 10.102.10.76 45654 {
<br>=A0=A0=A0=A0=A0=A0=A0 weight 3
<br>=A0=A0=A0=A0=A0=A0=A0 MISC_CHECK {
<br>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 misc_path /root/test/f.py
<br>=A0=A0=A0=A0=A0=A0=A0 }
<br>=A0=A0=A0 }
<br>=A0=A0=A0 connect_timeout 2
<br>=A0=A0=A0 nb_get_retry 2
<br>=A0=A0=A0 delay_before_retry 1
<br>}
<br>
<br>Do I need to do any additional configuration in keepalived.conf?
<br>
<br>The failover happens as expected when &quot;ifdown eth1&quot; and &quot=
;ifup eth1&quot; are=20
executed on the master server.<div><br></div><div>Regards,</div><div>=A0 --=
Vasulu S=A0</div>

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