On 10 November 2011 17:40, Jan-Oliver John <[email protected]> wrote:
> Hi guys,
>
> is it possible to set a response header that includes the server id the
> request has been sent to?
>
> Maybe with "rspadd <something>"?
I'm not sure if rspadd is up to the job. I had a quick look and it
looks like the answer is 'no'.
I've got this working with Apache httpd backends though, if you're
using some other server as a backend feel free to ignore everything
that follows. :-)
Instructions are for apache2 on Ubuntu, so adjust as necessary.
Enable mod_headers:
$ sudo a2enmod headers
Add the following line to /etc/apache2/envvars:
export HOSTNAME=`hostname`
Add this somewhere in /etc/apache2/httpd.conf:
#Add server name header so we can identify backend server when
traffic passes through HAproxy
PassEnv HOSTNAME
Header set X-Backend-Server "%{HOSTNAME}e %D %t"
You can skip the %t and %D if you want, they just add the timestamp
Apache received the request and the duration of Apaches handling of
the request.
Restart Apache:
$ sudo /etc/init.d/apache2 restart
Aaaaand that's it. :-)
HTH,
Graeme.
