## Consul Web UI

This directory contains the Consul Web UI. Consul contains a built-in
HTTP server that serves this directory, but any common HTTP server
is capable of serving it.

It uses JavaScript and [Ember](http://emberjs.com) to communicate with
the [Consul API](https://www.consul.io/api/index.html). The basic
features it provides are:

- Service view. A list of your registered services, their
health and the nodes they run on.
- Node view. A list of your registered nodes, the services running
on each and the health of the node.
- Key/value view and update

It's aware of multiple datacenters, so you can get a quick global
overview before drilling into specific data-centers for detailed
views.

The UI uses some internal undocumented HTTP APIs to optimize
performance and usability.

### Development

Improvements and bug fixes are welcome and encouraged for the Web UI.

You'll need sass to compile CSS stylesheets. Install that with
bundler:

    cd ui/
    bundle

Reloading compilation for development:

    make watch

Consul ships with an HTTP server for the API and UI. By default, when
you run the agent, it is off. However, if you pass a `-ui-dir` flag
with a path to this directory, you'll be able to access the UI via the
Consul HTTP server address, which defaults to `localhost:8500/ui`.

An example of this command, from inside the `ui/` directory, would be:

    consul agent -bootstrap -server -data-dir /tmp/ -ui-dir .

Basic tests can be run by adding the `?test` query parameter to the
application.

When developing Consul, it's recommended that you use the included
development configuration.

    consul agent -config-file=development_config.json

### Releasing

`make dist`

The `../pkg/web_ui` folder will contain the files you should use for deployment.

### Acknowledgments

Cog icon by useiconic.com from the [Noun Project](https://thenounproject.com/term/setting/45865/)

### Compiling the UI into the Go binary

The UI is compiled and shipped with the Consul go binary. The generated bindata
file lives in the `command/agent/bindata_assetfs.go` file and is checked into
source control. This is useful so that not every Consul developer needs to set
up bundler etc. To re-generate the file, first follow the compilation steps
above to build the UI assets into the `pkg/web_ui` folder. With that done, from the
root of the Consul repo, run:

```
$ make static-assets
```

The file will now be refreshed with the current UI data. You can now rebuild the
Consul binary normally with `make bin` or `make dev`, and see the updated UI
after re-launching Consul.
