by Chris Bird ([email protected])

Monitors a configurable array of URLs and displays traffic lights to display their status:

• If the URLs has a status that is not 200 OK at most once during the last two minutes, the traffic light is green
• If the status is non-200 more than once in the last two minutes, the traffic light flashes red

This was written as a tech test for a company called NewsNow. They wanted me to show how I could make a dashboard to monitor the status of various webservers that they are running. The specification is here.

The backend which simulates the endpoints is a Flask (Python) app in /server. The frontend is vanilla JavaScript, in /server/static/js/main.js

Set up the server:

$ python3 -m venv venv
$ . ./venv/bin/activate
$ pip3 install -r requirements.txt
$ ./run

Browse to http:https://localhost:5000

Choose a configuration by clicking on the links on the left, and wait for the traffic lights to change, according to which configuration is chosen.

For example, Configuration 4 has four traffic lights:

• One that is 503 every other second
• One that is down for 10 seconds per two minutes
• One that is down for 20 seconds per two minutes
• One that is down for 35 seconds per two minutes

There are links on the right to show the JSON configuration and a description of each configuration.