mod_jk failover and preferring localhost

[Rainer Jung <rainer.jung (at) kippdata.de>]

Short answer for your question:

the two lines you tried to use as a distance configuration both have typos:

> workers.localhost.distance=10
> workers.localhost.distance=20

workers -> worker
localhost -> ritin (once)

I just did a quick test with 1.2.20 (there should no be change wrt.
distance between 19 and 20) and it worked.

Regards,

Rainer

daneturner schrieb:
> I just tested with mod_jk 1.2.19 and it still seems as though the distance
> parameter is being ignored.  Output from the status/monitor.page shows
> mod_jk alternating between tomcats with different distance values in
> workers.properties.  
> 
> How can I troubleshoot this further?
> 
> Here's my workers.properties...
> 
> dane (at) nuked:/usr/local/etc/apache$ cat workers.properties
> workers.tomcat_home=/usr/local/tomcat5.5
> workers.java_home=/usr/local/jdk
> ps=/
> worker.list=tomcat
> 
> worker.tomcat.type=lb
> worker.tomcat.socket_timeout=195
> worker.tomcat.balance_workers=localhost,ritin
> worker.tomcat.sticky_session=False
> 
> worker.localhost.port=8009
> worker.localhost.socket_timeout=195
> worker.localhost.host=localhost
> worker.localhost.type=ajp13
> workers.localhost.distance=10
> worker.localhost.lbfactor=1
> 
> worker.ritin.port=8009
> worker.ritin.host=ritin
> worker.ritin.type=ajp13
> workers.localhost.distance=20
> worker.ritin.lbfactor=1
> 
> 
> And some version information...
> 
> dane (at) nuked:~$ grep mod_jk /var/log/apache/error_log |tail -1
> [Thu Dec  7 16:13:04 2006] [notice] Apache/1.3.37 (Unix) mod_perl/1.29
> mod_ssl/2.8.28 OpenSSL/0.9.7e-p1 mod_jk/1.2.19 configured -- resuming normal
> operations
> 
> 
> Dane
> 
> 
> Rainer Jung-3 wrote:
>> The new attribute distance will help you. It was first implemented for
>> version 1.2.16, which is in the process of being released (see my other
>> answer).
>>
>> Please test and let us know your results.
>>
>> thuss2 schrieb:
>>> We have 10 web servers with Tomcat's running on them and a mod_jk
>>> configuration to prefer the tomcat on localhost and only failover to
>>> another
>>> machine if the local one fails. This worked fine under our older mod_jk,
>>> however, we just upgraded to 1.2.15 and now it that the local_worker
>>> properties are no longer supported, it's load balancing every request.
>>>
>>> So I checked out the workers.properties options page:
>>> http://tomcat.apache.org/connectors-doc/config/workers.html and noticed
>>> the
>>> new distance option so that I can give localhost a distance of 0 and
>>> everything else a greater distance so that the load balancer should
>>> always
>>> prefer localhost. However, it seems to be ignoring the distance property
>>> completely and load balancing every request. Can anyone suggest what I
>>> might
>>> try to get it to always use the local tomcat for requests unless it
>>> fails:
>>>
>>> worker.list=tomcat
>>> worker.tomcat.type=lb
>>> worker.tomcat.socket_timeout=195
>>> worker.tomcat.balance_workers=localhost,latin1,latin2,...
>>> worker.tomcat.sticky_session=False
>>>
>>> worker.localhost.port=8009
>>> worker.localhost.host=localhost
>>> worker.localhost.type=ajp13
>>> worker.localhost.lbfactor=1
>>> worker.localhost.distance=0
>>>
>>> worker.latin1.port=8009
>>> worker.latin1.host=latin1
>>> worker.latin1.type=ajp13
>>> worker.latin1.lbfactor=1
>>> worker.latin1.distance=1
>>>
>>> worker.latin2.port=8009
>>> worker.latin2.host=latin2
>>> worker.latin2.type=ajp13
>>> worker.latin2.lbfactor=1
>>> worker.latin2.distance=1
>>>
>>> Thanks,
>>> Todd
>>>
>>> --
>>> View this message in context:
>>> http://www.nabble.com/mod_jk-failover-and-preferring-localhost-t1825380.html#a4979143
>>> Sent from the Tomcat - User forum at Nabble.com.
>>>
>>>
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