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I would like to apply a date based custom filename for apache2 log files, which I want to use for clickheat. In the example it writes:

CustomLog "clickheat.%Y-%m-%d-%H" "%r" env=clickheat

But for me it creates a file with name clickheat.%Y-%m-%d-%H the variables are not substituted.

I have not found in apache2 docs which parameter should I enable or set.

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You have to send logs to command ("|/usr/bin/rotatelogs <path_with_format> <time|size>"). Like this one:

# Check path to rotatelogs and log file directory
CustomLog "|/usr/bin/rotatelogs /var/log/apache/clickheat.%Y-%m-%d-%H 3600" "%r" env=clickheat
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Looks like this is strftime-substitution only. It'd be nice to substitute hostnames or some other variables. – lkraav Aug 1 '13 at 22:56

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