This is still fairly rough, but enables you to spin up a local cluster and play with some applications that run on OpenLambda. The start-local-cluster.py script starts an nginx load balancer, a Lambda store (currently just a Docker registry), and a number of Lambda workers. Each of these nodes runs as a Docker container. Each Lambda worker contains our Lambda engine, a RethinkDB shard, and a Docker daemon for sandboxing Lambdas (yes, we're running Docker inside of Docker).

Warning: this is certainly not secure yet. Lambdas run on the same network as our servers, and the RethinkDB database is shared between all applications.