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From David kerber <dcker...@verizon.net>
Subject Re: Verifying mod_jk is installed
Date Tue, 18 Sep 2012 16:09:27 GMT
On 9/18/2012 11:46 AM, John Rellis wrote:
> On Tue, Sep 18, 2012 at 3:56 PM, André Warnier<aw@ice-sa.com>  wrote:
>
>> John Rellis wrote:
>>
>>> André,
>>>
>>> Thanks!  OK, so I put
>>>
>>>          JkMount /jkmanager/ jkstatus
>>>          JkMount /jkmanager/* jkstatus
>>>
>>> Into apache2.conf and no success.  I did however put it
>>> in sites-available/default
>>>
>>> <VirtualHost *:80>
>>>          ServerAdmin webmaster@localhost
>>>
>>>          JkMount /jkmanager/ jkstatus
>>>          JkMount /jkmanager/* jkstatus
>>> .....
>>>
>>> And I can now hit host/jkmanager/ and I get a UI.
>>>
>>> Is this the expected behaviour???
>>>
>>>   Yes, but do not top-post.  Read http://en.wikipedia.org/wiki/**
>> Posting_style#Choosing_the_**proper_posting_style<http://en.wikipedia.org/wiki/Posting_style#Choosing_the_proper_posting_style>
>>
>> In reality there are several factors at work here.  We are getting into
>> Apache VirtualHost logic, and the logic of inheritance of JkMount from the
>> main Apache configuration to the virtual hosts.
>> To get a fuller explanation, see the online documentation and the
>> "JkMountCopy" directive.
>>
>> Briefly :
>> - for Apache httpd :
>>     - generally, whatever "lives" outside a<VirtualHost>  section belongs
>> to the "main" configuration, and basically acts as a default value for any
>> VirtualHost, /unless/ it is superseded by a similar directive inside a
>> <VirtualHost>  section.
>> - for JkMount however : by default, a JkMount in the main httpd
>> configuration is /not/ inherited by the VirtualHost sections, /unless/ you
>> use the JkMountCopy instruction appropriately.
>>
>> In addition, there is the logic determining which VirtualHost
>> configuration is really handling your request.
>> The first defined VirtualHost in the Apache httpd configuration (from top
>> to bottom) acts as the "default" VirtualHost.  That means that for any
>> request where httpd cannot determine to which VirtualHost it is addressed
>> (because the hostname of the request does not match any "ServerName" of a
>> VirtualHost), Apache httpd will use this default virtual host configuration
>> to process the request.
>>
>> In your case, if you send a request to "http://(ip address)/x", and none
>> of your VirtualHost sections contains a "serverName (ip address)" matching
>> exactly, then the request will be processed with the configuration of the
>> default VirtualHost.
>> Which is what is happening here.
>>
>> And the combination of all the above is why, when you put the JkMounts in
>> the default VirtualHost configuration section, it "works".
>>
>> But it is not really supposed to work that way. Your http request should
>> be properly addressed to a specific VirtualHost - by name - and this
>> VirtualHost configuration should be so that it contains the appropriate
>> JkMount directives (or a JkMountCopy directive, to inherit the JkMounts
>> from the main configuration).
>>
>> And I hope that you are not totally lost ater that. ;-)
>>
>>
>>
>> ------------------------------**------------------------------**---------
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>>
>>
>
>
> André,
>
> Thanks very much for your help.
>
> I put :
>
> <VirtualHost *:80>
>          ServerAdmin webmaster@localhost
>          JkMount /ClusterApp/ LoadBalancer
>          JkMount /ClusterApp/* LoadBalancer
>          JkMount /jkmanager/ jkstatus
>          JkMount /jkmanager/* jkstatus
>
> And it is now hitting my cluster after two days of agony soooo
>   YEEEEEEEEEEESSSSSSSSS!!!!
>
> Phew!  Your explanation is great, and with it, i put JkMountCopy in the
> virtual host and the url mappings in apache2.conf and it works!  :)  Beer!
>
> Thanks again.  Regarding top posting, apologies, I am using gmail and I
> never noticed it was an issue on other lists but I of course respect the
> decision of each individual list! :)
>
> I'm not sure how to bottom post in gmail so I just put my reply after
> yours, hope its ok!

That's exactly what bottom-posting is, so you did it just right.



>


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