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Reply to topic   Topic: Output multiple logs in different formats
Author
navillus



Joined: 25 Apr 2024
Posts: 2

PostPosted: Fri 26 Apr '24 20:51    Post subject: Output multiple logs in different formats Reply with quote

I inherited an Apache system that uses a custom log format that analyzers don't understand. Can Apache also output a second log in a standard format?

Thanks,
Michael
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tangent
Moderator


Joined: 16 Aug 2020
Posts: 316
Location: UK

PostPosted: Fri 26 Apr '24 21:55    Post subject: Reply with quote

Yes it can.

The LogFormat directive defines the details to be saved in a log file. The default parameter sets are called 'combined' and 'common', and are defined in the standard httpd.conf file. These formats should be accepted by most log file analyzers,

Additional LogFormat entry sets, such as 'custom', can be used to save alternative parameters in log files. Once defined, the CustomLog directive can be used to create log files based on a given format, e.g.
Code:
CustomLog "logs/access.log" combined
# or
CustomLog "logs/access.log" common

So assuming you've got a 'custom' format at the moment, all you need to do is add another CustomLog directive specifying a new log file, with the 'combined' or 'common' format.

See https://httpd.apache.org/docs/current/mod/mod_log_config.html for details.
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navillus



Joined: 25 Apr 2024
Posts: 2

PostPosted: Mon 29 Apr '24 14:21    Post subject: Reply with quote

Thank you tangent!
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Stray78



Joined: 15 Apr 2024
Posts: 14
Location: USA

PostPosted: Wed 01 May '24 2:41    Post subject: Reply with quote

you can also not log specific files also.

<IfModule log_config_module>
#
# Don't log these files!
#
SetEnvIf Request_URI \.jpg$ dontlog
SetEnvIf Request_URI \.js$ dontlog
SetEnvIf Request_URI \.css$ dontlog
SetEnvIf Request_URI \.png$ dontlog
SetEnvIf Request_URI \.gif$ dontlog
SetEnvIf Request_URI \.ico$ dontlog
#SetEnvIf Request_URI \.php$ dontlog
#SetEnvIf Request_URI \.htm$ dontlog
#SetEnvIf Request_URI \.html$ dontlog
SetEnvIf Request_URI \.ttf$ dontlog
SetEnvIf Request_URI \.woff2$ dontlog
#SetEnvIfNoCase Request_URI ^woff2$ dontlog
SetEnvIf Request_URI "fontawesome-webfont" dontlog
SetEnvIf Request_URI \.map$ dontlog
SetEnvIf Request_URI \.webp$ dontlog
SetEnvIf Request_URI "^/forms/captcha(.*)$" dontlog

# Speedtest log block #
SetEnvIf Request_URI "/upload" dontlog
SetEnvIf Request_URI "/downloading" dontlog


LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
LogFormat "%v | %h | %t \"%r\" %>s %b %T" common_virtualhost

</IfModule>

Set the environmental variables above, then use them in your vhost section.

CustomLog "D:/logs/Apache/HTTPS/Secured.log" "combined" env=!dontlog

Smile
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