fl-cli

The FunLess CLI

This is the repository for the FunLess platform CLI tool (fl), a new generation research-driven serverless platform.

The CLI is written in Go, using the Kong framework. It can be used to deploy the platform, manage modules and create, delete, invoke functions.

The Commands

The CLI offers 3 main commands:

• admin: currently used only to deploy and remove the platform on a local machine
• fn: used to create, delete and invoke functions
• mod: used to create, delete and get information on modules
• template: used to manage the template folder

Each command has a series of subcommands. Use --help to get more information on each command.

fl admin

The admin command has currently 1 subcommand: deploy which can be used chained with:

• docker up: to deploy the platform on a local machine using Docker containers
• docker down: to remove the platform from a local machine
• kubernetes up: to deploy the platform on a Kubernetes cluster (not yet updated)
• kubernetes down: to remove the platform from a Kubernetes cluster (not yet updated)

fl fn

The fn command is used for anything function related. It has currently 6 subcommands:

• invoke: to invoke an existing function
• build: to build the wasm file from a function's source code
• upload: to upload a function's wasm file to the platform with a given name
• create: a combination of build and upload, the wasm file is removed after the upload
• delete: to delete a function from the platform
• new: to create new function's project files from a templates

fl mod

The mod command is used for anything module related. It has currently 5 subcommands:

• create: to create a new module
• delete: to delete a module
• get: to get information on a module (name and functions inside)
• list: to list all modules
• update: to update a module's name

fl template

The template command is used to pull or list templates. It has currently 2 subcommands:

• pull: to pull a template from a repository
• list: to list all templates in the current folder

Installation

Right now only the linux version of the CLI is supported, although we build and release the CLI for windows and macos as well, therefore they are not guaranteed to work (if anyone wants to try on those platforms and give feedback/help we'd appreciate it).

The tool is in the Release page of this repository, and can be downloaded from there. In linux, just move the binary to a folder in your $PATH and you're good to go.

Usage

We added the docker deployment in the tool to have an easy quick start. It uses docker compose under the hood so you need to have a recent version of docker installed and running (you can find a more in depth quick start at funless.dev). All you have to do is run:

fl admin deploy docker up

This will deploy the platform on your local machine, together with some helper services to handle the logs (Kibana with Elasticsearch). You can access Kibana interface at localhost:5601.

The core services, instead, are:

• the core container which exposes the JSON API to interact with the platform (at localhost:4000)
• the worker container which handles the execution of the functions (only 1 worker in the local deploy)
• the postgres container which is the database used by the platform
• the prometheus container which is the monitoring service used by the platform (at localhost:9090)

To remove the platform from your machine, just run

fl admin deploy docker down

Using custom images

If you are working on the core or worker, there is an easy way to quick start the platform with your custom components. You need to build the images for the core and/or the worker and then specify them in the docker up command:

fl admin deploy docker up --core <your-core-image> --worker <your-worker-image>

Contributing

Anyone is welcome to contribute to this project or any other FunLess project.

You can contribute by testing the projects, opening tickets, writing documentation, sharing new ideas for future works and, of course, by contributing code.

You can pick an issue or create a new one and fork the repo so you're free to work on it. Once you feel ready open a Pull Request to send your code to us.

License

This project is under the Apache 2.0 license.