mjhjmtu

With RHEL and Apache (httpd), is there a way to:

• Detect which v.host (domain) is gaining how many incoming connections?

Because in this few days, I got a lot of incoming connections on the server being acknowledged by using:

• 
  

  ps aux | grep httpd -c

  
  
  

  734

  
  

That means I have 734 incoming connections currently being handled by Apache but the problem is I have (lets say) 10 Vhosts (domains).

• So which domain is getting the high loads?

I would modify the access log format to include the host string in the log. Then it is a simple matter to sort and count by vhost. These are the apache configuration lies I use.

# Modified log format with virtual host, execution time, and query params
LogFormat "%v:%p %a %T %u %t "%r" %>s %O "%Refereri" "%User-Agenti"" local

# Define an access log for VirtualHosts that don't define their own logfile
CustomLog /var/log/apache2/access.log local

This can be counted using a command like:

cut -dt -f1 access.log | sort | uniq -c

Or you can use awk (which allows selection by time of day and/or other data):

awk 'print $1' access.log | sort | uniq -c

Alternatively use separate access logs for each vhost. A simple word count on the active access logs would answer your question.

To check the current activity enable the mod-status plugiyn and fetching the status using the URL http://127.0.0.1/server-status. The output will include the last URL processed by each slot as well as its current state. This information can be used to determine the current state. Using the output of the URL http://127.0.0.1/server-status?notable may be easier to parse.

The command w3m -dump http://127.0.0.1/server-status?notable povides a nice text dump. However, the comamands wget or curl are commonly used for this kind of query.