$ systemctl cat openvpn@.service
# /lib/systemd/system/openvpn@.service
[Unit]
Description=OpenVPN connection to %i
PartOf=openvpn.service
ReloadPropagatedFrom=openvpn.service
Before=systemd-user-sessions.service
Documentation=man:openvpn(8)
Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn23ManPage
Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO

[Service]
PrivateTmp=true
KillMode=mixed
Type=forking
ExecStart=/usr/sbin/openvpn --daemon ovpn-%i --status /run/openvpn/%i.status 10 --cd /etc/openvpn --script-security 2 --config /etc/openvpn/%i.conf --writepid /run/openvpn/%i.pid
PIDFile=/run/openvpn/%i.pid
ExecReload=/bin/kill -HUP $MAINPID
WorkingDirectory=/etc/openvpn
ProtectSystem=yes
CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_READ_SEARCH CAP_AUDIT_WRITE
LimitNPROC=10
DeviceAllow=/dev/null rw
DeviceAllow=/dev/net/tun rw

[Install]
WantedBy=multi-user.target



# /etc/systemd/system/openvpn@.service.d/override.conf
[Service]
Restart=always
RestartSec=30