Questions[logrotate](ubuntu)

My server dumps because of huge system log files. I've heard that we could limit the size of system log by adding such a line size 100m into the file /etc/logrotate.d/rsyslog to do so.

Now my /etc/logrotate.d/rsyslog becomes as below:

/var/log/syslog
{
        rotate 7
        daily
        size 100m
        missingok
        notifempty
        delaycompress
        compress
        postrotate
                invoke-rc.d rsyslog rotate > /dev/null
        endscript
}

My question is: how does size 100m work with rotate 7?

Without size 100m, rotate 7 and daily together mean that the system log will be rotated daily and it will keep 7 days worth of backlogs. Now if I add size 100m and some daily log is bigger than 100m, will it rotate immediately? If so, does it mean that I may get 7 backlogs in a day if some daily log grows too much (more than 700mb)?

Not sure if this is possible at all.

And what about empty lines?

Update:

Testing the config with

logrotate -d /etc/logrotate.d/apache2

returns

error: /etc/logrotate.d/apache2:1 lines must begin with a keyword or a filename (possibly in double quotes)

for every empty line in the config file.

Original question about comment syntax is answered, though.

Update 2: This config now seems to work for me (note that it restarts apache after rotation):

/var/log/apache2/*.log {
    # https://stackoverflow.com/questions/26482773/apache-and-logrotate-configuration
    su root adm
    daily
    missingok
    rotate 14
    create 640 root adm
    # https://stackoverflow.com/questions/25845752/logrotate-suffix-dateext-rotate
    dateext
    dateformat -%Y-%m-%d.log
    sharedscripts
    postrotate
        systemctl restart apache2 || true
    endscript
}

I moved logging for openvpn into its own log and attempted to set up log rotation for it, but I've obviously done something wrong.

Logging occurs as desired but always into the 2nd logfileopenvpn.log.1. The 'current' logfile openvpn.log exists, but is always empty.

-rw------- 1 root root     0 Apr 20 07:35 openvpn.log
-rw------- 1 root root  5411 Apr 20 07:58 openvpn.log.1

Here's my logrotate configuration file for openvpn.

/var/log/openvpn.log {
       daily
       rotate 7
       delaycompress
       compress
       notifempty
       missingok
}

The line in Openvpn's server.conf regarding logging is

log-append /var/log/openvpn.log

What did I mess up?

I'm working on an apache logs analyser, it requires the apache log files to be imported into a directory for processing. I cannot simply point it to the apache logs directory as it imports each file before deleting it. It also has no concept of duplicate records, so I cannot set up a cron to copy /var/log/apache2/* into the folder.

I assume logrotate is the best place to do this, but I don't have a clue where to start to configure it. So my question is:

How can I configure logrotate to SSH rotated apache log files to a remote host automatically?

The alternative is to copy locally and run scp & rm via cron, but a one-step SSH process would be nice.

I want to rotate my syslog daily... How do I do this? How to check whether log rotate is working? How to make it run daily? By default, does Ubuntu Server run logrotate daily? Or do I have to set it after installation?