715ef8267e
* add functionality to wait for specialization by keeping track of incoming requests * format executor package * fix required capacity to specialise new pod condition * move handling concurrency logic into pool cache from executor * remove unused methods and structs * implement queue in to store the svc wait * create a queue struct and its methods to handle concurrent inputs * use newly created queue to store waiting for svc requests * add waiting requests in queue and use them when a svc is ready * set function to request in queue if the context is still alive * remove concurrency approach to set svc for waiting requests * update the active requests whenever requests from pool are assigned a svc * add doc to define why the conditions exist * remove unwanted params in strcut and clean up code * set error while getting svc value if sum of specialization in progress and specialized is only more than concurrency limit * remove duplicate functions and unnecessary values in struct * close svc channel on set value and create constants for default concurrency and rpp * get next value in queue in case context is timed out for fetched value * remove specializationInProgress counter from pool cache * return in case the queue is empty wihle setting func to svc * test getSvcVaue and setSvcValue in poolcache * add unit tests for GetConcurrent and GetRequestsPerPod methods * reorder imports * add fuzzy testing for getSVCValue and setSVCValue in poolcache * restructure go mod file and update pool cache test cases * Add tests and bug fixes * refactor code and add test cases * add svcWaiting check while setting svc value --------- Signed-off-by: Sanket Sudake <sanketsudake@gmail.com> Co-authored-by: Sanket Sudake <sanketsudake@gmail.com>
Fission: Serverless Functions for Kubernetes
Fission is a fast serverless framework for Kubernetes with a focus on developer productivity and high performance.
Fission operates on just the code: Docker and Kubernetes are abstracted away under normal operation, though you can use both to extend Fission if you want to.
Fission is extensible to any language; the core is written in Go, and language-specific parts are isolated in something called environments (more below). Fission currently supports NodeJS, Python, Ruby, Go, PHP, Bash, and any Linux executable, with more languages coming soon.
Table of Contents
Performance: 100msec cold start
Fission maintains a pool of "warm" containers that each contain a small dynamic loader. When a function is first called, i.e. "cold-started", a running container is chosen and the function is loaded. This pool is what makes Fission fast: cold-start latencies are typically about 100msec.
Kubernetes is the right place for Serverless
We're built on Kubernetes because we think any non-trivial app will use a combination of serverless functions and more conventional microservices, and Kubernetes is a great framework to bring these together seamlessly.
Building on Kubernetes also means that anything you do for operations on your Kubernetes cluster — such as monitoring or log aggregation — also helps with ops on your Fission deployment.
Getting Started
# Add the stock NodeJS env to your Fission deployment
$ fission env create --name nodejs --image fission/node-env
# Create a function with a javascript one-liner that prints "hello world"
$ fission function create --name hello --env nodejs --code https://raw.githubusercontent.com/fission/examples/master/nodejs/hello.js
# Run the function. This takes about 100msec the first time.
$ fission function test --name hello
Hello, world!
Learn More
- Understand Fission Concepts.
- See the installation guide for installing and running Fission.
- You can learn more about Fission and get started from Fission Docs.
- To see Fission in action, check out the Fission Examples Repo.
- See the troubleshooting guide for debugging your functions and Fission installation.
Contributing
Check out the contributing guide.
Who is using Fission?
- Fareye
- Apple
- iQuanti
- A large telecom CSP
- Gadget
- CinnamonAI
- Armo
- The Social Audience
- KubeML
- Unilever
- BD
- Biofourmis
- Babylon
Sponsors
The following companies, organizations, and individuals support Fission's ongoing maintenance and development. If you are using/contributing to Fission, we would be happy to list you here, please raise a Pull request.
License
Fission is licensed under the Apache License 2.0 - see the LICENSE file for details