Tunnel

This is a simple ssh-tunnel container for easily connecting to other containers / servers elsewhere via a --link-ed tunnel container. This tunnel will use your local SSH-agent to connect to the endpoint thus no need to push your ~/.ssh/ files into the image.

Usage

The full syntax for starting an image from this container:

docker run -d --name [$your_tunnel_name] -v $SSH_AUTH_SOCK:/ssh-agent kingsquare/tunnel *:[$exposed_port]:[$destination]:[$destination_port] [$user@][$server]

You can append any ssh parameters

Mac support: Please be aware that with the launch of the Docker for Mac Beta this currently doesnt work on Mac. Please see this note

Examples

• you would like to have a tunnel port 3306 on server example.com locally exposed as 3306

  docker run -d --name tunnel_mysql -v $SSH_AUTH_SOCK:/ssh-agent kingsquare/tunnel *:3306:localhost:3306 me@example.com

• you would like to have a tunnel port 3306 on server example.com locally exposed on the host as 3308

  docker run -d -p 3308:3306 --name tunnel_mysql -v $SSH_AUTH_SOCK:/ssh-agent kingsquare/tunnel *:3306:localhost:3306 me@example.com

Using as an Ambassador

This method allows for using this image as an ambassador to other (secure) servers:

docker stop staging-mongo;
docker rm staging-mongo;
docker run -d --name staging-mongo -v $SSH_AUTH_SOCK:/ssh-agent kingsquare/tunnel *:2222:127.0.0.1:27017 tunnel-user@db.staging

docker stop production-mongo;
docker rm production-mongo;
docker run -d --name production-mongo -v $SSH_AUTH_SOCK:/ssh-agent kingsquare/tunnel *:2222:127.0.0.1:27017 tunnel-user@db.production

use the links in another container via exposed port 2222:

docker run --link staging-mongo:db.staging \
    --link production-mongo:db.production \
    my_app start