core-admin/linux/system-config/logrotate-qubes

/var/log/qubes/qmemman.log {
    create 0640 root qubes
    su root qubes
    postrotate
        /bin/systemctl restart qubes-qmemman.service >/dev/null 2>/dev/null || true
    endscript
}

/var/log/qubes/qubes.log {
    create 0640 root qubes
    su root qubes
    postrotate
        /bin/systemctl restart qubesd.service >/dev/null 2>/dev/null || true
    endscript
}

/var/log/qubes/vm-*.log {
    su root qubes
}