87 lines
3.9 KiB
Markdown
87 lines
3.9 KiB
Markdown
Containerized ngrok
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===================
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[](https://imagelayers.io/?images=wernight/ngrok:latest 'Get your own badge on imagelayers.io')
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A [Docker][docker] image for [ngrok][ngrok] v2, introspected tunnels to localhost.
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It's based on the excellent work of [wizardapps/ngrok][wizardapps/ngrok] and [fnichol/ngrok][fnichol/ngrok].
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### Features
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* **Small**: Built using [busybox][busybox].
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* **Simple**: Just link as `http` or `https` in most cases, see below; exposes ngrok server `4040` port.
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* **Secure**: Runs as non-root user with a random UID `6737` (to avoid mapping to an existing UID).
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### Configuration
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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.
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Additionally, you can specify one of several environment variable (via `-e`) to configure your Ngrok tunnel:
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* `NGROK_AUTH` - Authentication key for your Ngrok account. This is needed for custom subdomains, custom domains, and HTTP authentication.
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* `NGROK_SUBDOMAIN` - Name of the custom subdomain to use for your tunnel. You must also provide the authentication token.
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* `NGROK_DOMAIN` - Paying Ngrok customers can specify a custom domain. Only one subdomain or domain can be specified, with the domain taking priority.
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* `NGROK_USERNAME` - Username to use for HTTP authentication on the tunnel. You must also specify an authentication token.
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* `NGROK_PASSWORD` - Password to use for HTTP authentication on the tunnel. You must also specify an authentication token.
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* `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.
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To see command-line options, run `docker run --rm wernight/ngrok --help`.
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### Usage
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Supposing you've an Apache or Nginx Docker container named `web_service_container` listening on port 80:
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$ docker run --rm -it --link web_service_container wernight/ngrok ngrok http web_service_container:80
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#### Full example
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1. We'll set up a simple example HTTP server in a docker container named `www`:
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$ docker run -v /usr/share/nginx/html --name www_data busybox true
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$ docker run --rm --volumes-from www_data busybox /bin/sh -c 'echo "<h1>Yo</h1>" > /usr/share/nginx/html/index.html'
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$ docker run -d -p 80 --volumes-from www_data --name www nginx
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$ curl $(docker port www 80)
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<h1>Yo</h1>
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2. Now we'll link that HTTP server into an ngrok container to expose it on the internet:
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$ docker run -d -p 4040 --link www:http --name www_ngrok wernight/ngrok
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3. You can now access the [API][ngrok-api] to find the assigned domain:
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$ curl $(docker port www_ngrok 4040)/api/tunnels
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or access the web UI to see requests and responses:
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$ xdg-open http://$(docker port www_ngrok 4040)
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#### Helper
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For common cases you may want to create an alias in your `~/.profile` (or `~/.bashrc`, `~/.zshrc`, or equivalent):
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function docker-ngrok() {
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docker run --rm -it --link "$1":http wernight/ngrok ngrok http http:80
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}
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# For ZSH with Oh-My-Zsh! and 'docker' plugin enabled, you can also enable auto-completion:
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#compdef __docker_containers docker-ngrok
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Then to the simple example just do `docker-ngrok web_service_container`.
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### Feedbacks
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Report issues/questions/feature requests on [GitHub Issues][issues].
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Pull requests are very welcome!
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[issues]: https://github.com/wernight/docker-ngrok/issues
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[docker]: https://www.docker.io/
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[ngrok]: https://ngrok.com/
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[ngrok-api]: https://ngrok.com/docs#client-api
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[busybox]: https://registry.hub.docker.com/_/busybox
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[wizardapps/ngrok]: https://registry.hub.docker.com/u/wizardapps/ngrok/
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[fnichol/ngrok]: https://registry.hub.docker.com/u/fnichol/ngrok/
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