FaaS is a platform for building serverless functions on Docker Swarm Mode with first class metrics. Any UNIX process can be packaged as a function in FaaS enabling you to consume a range of web events without repetitive boiler-plate coding.
- Each container has a watchdog process that hosts a web server allowing a JSON post request to be forwarded to a desired process via STDIN. The respose is sent to the caller via STDOUT.
- A gateway provides a view to the containers/functions to the public Internet and collects metrics for Prometheus and in a future version will manage replicas and scale as throughput increases.
- Docker 1.13 (to support attachable overlay networks)
- At least a single host in Swarm Mode. (run
docker swarm init)
You can test-drive FaaS with a set of sample functions as defined in docker-compose.yml on play-with-docker.com for free, or on your own laptop.
See how to deploy FaaS onto play-with-docker.com and Docker Swarm in 1-2 minutes. See the sample functions in action and watch the graphs in Prometheus as we ramp up the amount of requests.
Prometheus is built into FaaS and the sample stack, so you can check throughput for each function individually with a rate function in Prometheus like this:
FaaS is still expanding and growing, check out the developments around:
- Auto-scaling
- Prometheus alerts
- More sample functions
- Brand new UI