Customizing the Log Format

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Customizing Log Format in OpenLiteSpeed is possible, and something you may wish to do during the troubleshooting process. For example, you may want to use NCSA Combined Log Format and then use the apachetop command for further log analysis. Here’s how.

You can set Log Format to whatever you like, for example:

"%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\"

Setting Log Format overrides the Log Headers setting.

Log Format should be a string. The syntax is compatible with Apache 2.0’s custom log format. Here are a few examples:

Common Log Format (CLF)

"%h %l %u %t \"%r\" %>s %b"

Common Log Format with Virtual Host

"%v %h %l %u %t \"%r\" %>s %b"

NCSA extended/combined log format

"%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\" 

Log cookie value of Foobar

"%{Foobar}C"

Alternatively, you can edit the OpenLiteSpeed /usr/local/lsws/conf/htttpd_config.conf configuration file directly, and add the following logFormat line there, like so:

accesslog $SERVER_ROOT/logs/access.log {
  logFormat               "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\"
  rollingSize             10M
  keepDays                30
  compressArchive         0
}

Restart OpenLiteSpeed when your changes are complete.