77 lines
3.1 KiB
Desktop File
77 lines
3.1 KiB
Desktop File
#
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# Docker + OpenVPN systemd service
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#
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# Author: Kyle Manna <kyle@kylemanna.com>
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# Source: https://github.com/kylemanna/docker-openvpn
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#
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# This service aims to make the update and invocation of the docker-openvpn
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# container seemless. It automatically downloads the latest docker-openvpn
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# image and instantiates a Docker container with that image. At shutdown it
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# cleans-up the old container.
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#
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# In the event the service dies (crashes, or is killed) systemd will attempt
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# to restart the service every 10 seconds until the service is stopped with
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# `systemctl stop docker-openvpn@NAME`.
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#
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# A number of IPv6 hacks are incorporated to workaround Docker shortcomings and
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# are harmless for those not using IPv6.
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#
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# To use:
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# 1. Create a Docker volume container named `ovpn-data-NAME` where NAME is the
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# user's choice to describe the use of the container.
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# 2. Initialize the data container according to the docker-openvpn README, but
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# don't start the container. Stop the docker container if started.
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# 3. Download this service file to /etc/systemd/service/docker-openvpn@.service
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# 4. Enable and start the service template with:
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# `systemctl enable --now docker-openvpn@NAME.service`
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# 5. Verify service start-up with:
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# `systemctl status docker-openvpn@NAME.service`
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# `journalctl --unit docker-openvpn@NAME.service`
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#
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# For more information, see the systemd manual pages.
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#
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[Unit]
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Description=OpenVPN Docker Container
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Documentation=https://github.com/kylemanna/docker-openvpn
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After=network.target docker.socket
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Requires=docker.socket
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[Service]
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RestartSec=10
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Restart=always
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# Modify IP6_PREFIX to match network config
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#Environment="IP6_PREFIX=2001:db8::/64"
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#Environment="ARGS=--config openvpn.conf --server-ipv6 2001:db8::/64"
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Environment="NAME=ovpn-%i"
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Environment="DATA_VOL=ovpn-data-%i"
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Environment="IMG=kylemanna/openvpn:latest"
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Environment="PORT=1194:1194/udp"
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# To override environment variables, use local configuration directory:
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# /etc/systemd/system/docker-openvpn@foo.d/local.conf
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# http://www.freedesktop.org/software/systemd/man/systemd.unit.html
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# Clean-up bad state if still hanging around
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ExecStartPre=-/usr/bin/docker rm -f $NAME
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# Attempt to pull new image for security updates
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ExecStartPre=-/usr/bin/docker pull $IMG
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# IPv6: Ensure forwarding is enabled on host's networking stack (hacky)
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# Would be nice to use systemd-network on the host, but this doens't work
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# http://lists.freedesktop.org/archives/systemd-devel/2015-June/032762.html
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ExecStartPre=/bin/sh -c 'test -z "$IP6_PREFIX" && exit 0; sysctl net.ipv6.conf.all.forwarding=1'
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# Main process
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ExecStart=/usr/bin/docker run --rm --cap-add=NET_ADMIN -v ${DATA_VOL}:/etc/openvpn --name ${NAME} -p ${PORT} ${IMG} ovpn_run $ARGS
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# IPv6: Add static route for IPv6 after it starts up
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ExecStartPost=/bin/sh -c 'test -z "${IP6_PREFIX}" && exit 0; sleep 1; ip route replace ${IP6_PREFIX} via $(docker inspect -f "{{ .NetworkSettings.GlobalIPv6Address }}" $NAME ) dev docker0'
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# IPv6: Clean-up
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ExecStopPost=/bin/sh -c 'test -z "$IP6_PREFIX" && exit 0; ip route del $IP6_PREFIX dev docker0'
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[Install]
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WantedBy=multi-user.target
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