Real time duplication of Apache app traffic to a second server

nice -n -20 ssh SOURCE_SERVER "tail -f /var/log/httpd/access.log " | awk '{print $7}' | grep jsp | parallel 'curl TARGET_SERVER{} 2>&1 /dev/null'
This takes the stream created by apache requests containing jsp and funnels them to another server. I'm using this for simulating real time traffic. The nice command gives ssh maximum CPU cycles, awk & grep strip out everything served by apache. Putting parallel on curl is important because curl is synchronous and waits for the response. Yes, I thought about using wget but it didn't seem any easier. Also, if you figure out how to run this in the background let me know. Every time I background it it stops. If you have multiple front end servers just run multiple instances of this.

These Might Interest You

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    sed -n '/05\/Dec\/2010/,$ p' access.log | goaccess -s -b
    allinurl · 2010-12-13 17:37:33 0
  • GoAccess is an open source real-time Apache web log analyzer and interactive viewer that runs in a terminal in *nix systems. It provides fast and valuable HTTP statistics for system administrators that require a visual server report on the fly. http://goaccess.prosoftcorp.com/ Show Sample Output


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    goaccess -f /var/log/apache2/access.log -s -b
    allinurl · 2010-10-25 20:03:18 1
  • Use this command to watch apache access logs in real time to see what pages are getting hit. Show Sample Output


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  • Run this on a windows machine then add your localhost as a socks server for port 8080 within your web browser. Your traffic will now be proxying and sent via your server over ssh.


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    Putty -d 8080 [server]
    felix001 · 2009-10-15 06:54:58 2

What Others Think

Have you tried backgrounding this with screen?
iambryan · 371 weeks and 3 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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