Writing to and rotating custom log files

Sometimes I need to log information from iRules to debug something. So I add a simple log statement, like this:

  when HTTP_REQUEST {
  if { [HTTP::uri] equals "/secure" } {
    log local0. "[IP::remote_addr] attempted to access /secure"
  }
}

  when HTTP_REQUEST {
  if { [HTTP::uri] equals "/secure" } {
    log local0. "##[IP::remote_addr] attempted to access /secure"
  }
}

  
tmsh modify sys syslog include '"
filter f_local0 {
    facility(local0) and not match(\": ##\");
};
 
filter f_local0_customlog {
    facility(local0) and match(\": ##\");
};
 
destination d_customlog {
    file(\"/var/log/customlog\" create_dirs(yes));
};
 
log {
    source(local);
    filter(f_local0_customlog);
    destination(d_customlog);
};
"'

  tmsh save / sys config

tmsh restart sys service syslog-ng

  tmsh modify sys log-rotate syslog-include '"
/var/log/customlog {
    compress
    missingok
    notifempty
}"'

  tmsh save / sys config