Mysteriously, logrotate stopped processing the apache logs automatically, causing huge log files to accumulate. This is on Ubuntu 9.10.
I could run logrotate fine from the command line, and when done so it correctly processed the apache logs.
To try to find out what was going on, I wanted to capture the output of logrotate when run by cron, so I edited /etc/cron.daily/logrotate to look like this:
/usr/sbin/logrotate -v /etc/logrotate.conf > /root/logrotate.log 2>&1 #/usr/sbin/logrotate /etc/logrotate.conf
Bizarrely this made logrotate work, including for apache. Swapping the commands back breaks it again!
For the record, here is /etc/logrotate.d/apache
/var/log/apache2/*.log {
# weekly
size 500M
missingok
rotate 52
compress
dateext
delaycompress
notifempty
create 640 root adm
sharedscripts
prerotate
webalizer
endscript
postrotate
if [ -f "`. /etc/apache2/envvars ; echo ${APACHE_PID_FILE:-/var/run/apache2.pid}`" ]; then
/etc/init.d/apache2 reload > /dev/null
fi
endscript
}