Merge pull request #74 from jpetazzo/openvpn-in-a-container

Run OpenVPN in a container. Because.

openvpn/Dockerfile

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+FROM alpine
+RUN apk update && apk add openvpn
+ENTRYPOINT ["openvpn"]
+WORKDIR /etc/openvpn

openvpn/README.md

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+# LMCTVPNFY
+
+Let Me Containerize That VPN For You
+
+
+## How to use this?
+
+Drop your OpenVPN configuration file in this directory.
+
+Let's pretend that it's called `hacktheplanet.ovpn`.
+
+Then all you have to do is to run:
+
+```
+docker-compose run vpn hacktheplanet.ovpn
+```
+
+If you need a password (because your OpenVPN configuration specifies `auth-user-pass`) you will be prompted for it.
+
+If the VPN server pushes routes and so forth, they will be added to your machine, because the Compose file specifies `net: host` so the container runs within the hosts namespace.
+
+If you **don't** need to specify a password, you can use `docker-compose run -d vpn hacktheplanet.ovpn` to start the container in the background.
+
+If you OpenVPN configuration needs extra files (certificates etc) you can drop them in this directory too.
+
+
+## Why?
+
+Because we're the containerati and we like when things are [neatly arranged in their boxes](https://twitter.com/zooeypeng/status/613053137050439681).
+

openvpn/docker-compose.yml

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+vpn:
+  build: .
+  volumes:
+    - .:/etc/openvpn
+  net: host
+  devices:
+    - /dev/net/tun:/dev/net/tun
+  cap_add:
+    - NET_ADMIN