Envoy UI

A simple UI for the CNCF's Envoy proxy that replicates some of the functionality of the HAproxy stats page. Intended to talk to a single instance of the proxy.

Fetches statistics from /clusters and /stats on the Envoy node and renders a single page with a more human-readable view of the statistics. Best used for instances that are gateway nodes or Internet-facing headends. Each view is a snapshot in time and does not auto-update.

Sample dashboard page for a proxy instance:

Installation

You may either use the pre-built Docker image or build the binaries yourself natively with Crystal. It has been tested on Linux and macOS.

$ crystal build --release envoy-ui.cr
$ ./envoy-ui

To build an image locally and run a container

$ docker build -t envoy-ui .
$ docker run envoy-ui

Configuration

If you are running Envoy UI on the command line you can configure it with CLI flags:

$ ./envoy-ui --help
Usage: envoy-ui [arguments]
    -h HOSTNAME, --host=HOSTNAME     Envoy proxy hostname (127.0.0.1)
    -p PORT, --port=PORT             Envoy proxy port (9901)
    -l PORT, --listen-port=PORT      Port to listen on (8080)
    --help                           Show this help

If you are running it in the Docker container, you may configure it with environment variables:

• ENVOY_UI_HOST: Envoy proxy hostname
• ENVOY_UI_PORT: Envoy proxy port
• ENVOY_UI_LISTEN_PORT: Port to listen on

Contributing

Contributions are more than welcome. Bug reports with specific reproduction steps are great. If you have a code contribution you'd like to make, open a pull request with suggested code.

Pull requests should:

• Clearly state their intent in the title
• Have a description that explains the need for the changes
• Include tests!
• Not break the public API

Ping us to let us know you're working on it by opening a GitHub Issue on the project.

Copyright (c) 2018 Nitro Software