/path/to/your/logfile/*.log {
    compress
    copytruncate
    delaycompress
    minsize 1G
    missingok
    nomail
    notifempty
    rotate 30
}

[Unit]
Description=Rotate My Log

[Service]
Type=oneshot
ExecStart=/usr/sbin/logrotate /etc/systemd/system/mylogrotate.config --state /etc/systemd/system/mylogrotate.state --verbose

[Unit]
Description=Rotate My Log Timer

[Timer]
OnCalendar=*:00:00
Persistent=true

[Install]
WantedBy=timers.target

systemctl enable mylogrotate.timer
systemctl start mylogrotate.timer