Initial version.

This commit is contained in:
Werner Beroux 2015-06-22 14:03:40 +02:00
parent c6c33ef1fd
commit ba678651d9
4 changed files with 148 additions and 1 deletions

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Dockerfile Normal file
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FROM busybox:ubuntu-14.04
MAINTAINER Werner Beroux <werner@beroux.com>
# Install ngrok
ADD https://dl.ngrok.com/ngrok_2.0.19_linux_amd64.zip /ngrok.zip
RUN unzip -o ngrok.zip -d /bin && \
false || rm -f ngrok.zip
# Add config script
ADD ngrok.yml /home/ngrok/.ngrok2/
ADD ngrok_discover /bin/ngrok_discover
# Create non-root user
RUN echo 'ngrok:x:6737:6737:Ngrok user:/home/ngrok:/bin/false' >> /etc/passwd
RUN echo 'ngrok:x:6737:' >> /etc/group
RUN chown ngrok:ngrok /home/ngrok
RUN chmod -R go=u,go-w /home/ngrok
RUN chmod go= /home/ngrok
USER ngrok
EXPOSE 4040
ENTRYPOINT '/bin/ngrok_discover'

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# docker-ngrok # ngrok
A [Docker][docker] image for [ngrok][ngrok] v2, introspected tunnels to localhost.
It's based on the excellent work of [wizardapps/ngrok][wizardapps/ngrok] and [fnichol/ngrok][fnichol/ngrok].
## Features
* Small: Built using [busybox][busybox].
* Safe: Runs as non-root user with a random UID `6737` (to avoid mapping to an existing UID).
* Simple: Just link as `http` or `https` in most cases, see below; exposes ngrok server 4040 port.
## Configuration
You simply have to link the Ngrok container to the application under the `app` or `http` or `https` aliases, and all of the configuration will be done for you by default.
Additionally, you can specify one of several environment variable (via `-e`) to configure your Ngrok tunnel:
* `NGROK_AUTH` - Authentication key for your Ngrok account. This is needed for custom subdomains, custom domains, and HTTP authentication
* `NGROK_SUBDOMAIN` - Name of the custom subdomain to use for your tunnel. You must also provide the authentication token
* `NGROK_DOMAIN` - Paying Ngrok customers can specify a custom domain. Only one subdomain or domain can be specified, with the domain taking priority.
* `NGROK_USERNAME` - Username to use for HTTP authentication on the tunnel. You must also specify an authentication token
* `NGROK_PASSWORD` - Password to use for HTTP authentication on the tunnel. You must also specify an authentication token
* `NGROK_PROTOCOL` - Can either be “HTTP” or “TCP”, and it defaults to “HTTP” if not specified. If set to “TCP”, Ngrok will allocate a port instead of a subdomain and proxy TCP requests directly to your application.
To see command-line options, run `docker run --rm wernight/ngrok --help`.
## Usage example
1. We'll set up a simple example HTTP server in a docker container named `www`:
$ docker run -v /usr/share/nginx/html --name www_data busybox true
$ docker run --rm --volumes-from www_data busybox /bin/sh -c 'echo "<h1>Yo</h1>" > /usr/share/nginx/html/index.html'
$ docker run -d -p 80 --volumes-from www_data --name www nginx
$ curl $(docker port www 80)
<h1>Yo</h1>
2. Now we'll link that HTTP server into an ngrok container to expose it on the internet:
$ docker run -d -p 4040 --link www:http --name www_ngrok wernight/ngrok
3. You can now access the [API][ngrok-api] to find the assigned domain:
$ curl $(docker port www_ngrok 4040)/api/tunnels
or access the web UI to see requests and responses:
$ xdg-open http://$(docker port www_ngrok 4040)
## Feedbacks
Report issues/questions/feature requests on [GitHub Issues][issues]
Pull requests are very welcome!
[issues]: https://github.com/wernight/docker-ngrok/issues
[docker]: https://www.docker.io/
[ngrok]: https://ngrok.com/
[ngrok-api]: https://ngrok.com/docs#client-api
[busybox]: https://registry.hub.docker.com/_/busybox
[wizardapps/ngrok]: https://registry.hub.docker.com/u/wizardapps/ngrok/
[fnichol/ngrok]: https://registry.hub.docker.com/u/fnichol/ngrok/

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web_addr: 0.0.0.0:4040

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ngrok_discover Executable file
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#!/bin/sh
if [ "$1" = "/bin/sh" ]; then
shift
fi
if [ -n "$HTTPS_PORT" ]; then
FWD="`echo $HTTPS_PORT | sed 's|^tcp://||'`"
elif [ -n "$HTTP_PORT" ]; then
FWD="`echo $HTTP_PORT | sed 's|^tcp://||'`"
elif [ -n "$APP_PORT" ]; then
FWD="`echo $APP_PORT | sed 's|^tcp://||'`"
fi
ARGS=""
if [ -n "$NGROK_AUTH" ]; then
ARGS="-authtoken=$NGROK_AUTH "
fi
# Set the subdomain or hostname, depending on which is set
if [ -n "$NGROK_HOSTNAME" ] && [ -n "$NGROK_AUTH" ]; then
ARGS="$ARGS -hostname=$NGROK_HOSTNAME "
elif [ -n "$NGROK_SUBDOMAIN" ] && [ -n "$NGROK_AUTH" ]; then
ARGS="$ARGS -subdomain=$NGROK_SUBDOMAIN "
elif [ -n "$NGROK_HOSTNAME" ] || [ -n "$NGROK_SUBDOMAIN" ]; then
if [ -z "$NGROK_AUTH" ]; then
echo "You must specify an authentication token after registering at https://ngrok.com to use custom domains."
exit 1
fi
fi
if [ -n "$NGROK_HEADER" ]; then
ARGS="$ARGS -host-header=$NGROK_HEADER "
fi
PROTOCOL="http"
if [ "$NGROK_PROTOCOL" == "TCP" ]; then
PROTOCOL="tcp "
fi
if [ -n "$NGROK_USERNAME" ] && [ -n "$NGROK_PASSWORD" ] && [ -n "$NGROK_AUTH" ]; then
ARGS="$ARGS -auth=\"$NGROK_USERNAME:$NGROK_PASSWORD\" "
elif [ -n "$NGROK_USERNAME" ] || [ -n "$NGROK_PASSWORD" ]; then
if [ -z "$NGROK_AUTH" ]; then
echo "You must specify a username, password, and Ngrok authentication token to use the custom HTTP authentication."
echo "Sign up for an authentication token at https://ngrok.com"
exit 1
fi
fi
case "$1" in
-h|help) ARGS=$1 ;;
*) ARGS="$PROTOCOL $ARGS -log stdout $* $FWD" ;;
esac
exec /bin/ngrok $ARGS