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OpenFunction

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Facts from OpenFunction's own pages

Autoscaling
It supports autoscaling from zero to N and event-metric-based autoscaling for asynchronous functions. · openfunction.dev, 7 Oct 2026
Backend integrations
OpenFunction integrates with Dapr and currently supports its pub/sub and bindings building blocks. · openfunction.dev, 7 Oct 2026
Builds
It can build function source code into container images using Shipwright and Cloud Native Buildpacks. · openfunction.dev, 7 Oct 2026
Deployment
Installation requires a Kubernetes cluster and documents deployment using Helm charts. · openfunction.dev, 7 Oct 2026
Event bus
OpenFunction Events lists NATS Streaming as a supported event bus broker. · openfunction.dev, 7 Oct 2026
Event sources
OpenFunction Events lists Kafka, Cron, and Redis as supported event source types. · openfunction.dev, 7 Oct 2026
Event triggers
Async-function examples include Kafka, cron, and MQTT inputs. · openfunction.dev, 7 Oct 2026
Function types
It supports synchronous functions that handle HTTP requests and asynchronous functions triggered by events. · openfunction.dev, 7 Oct 2026
Installation requirement
Installation requires a Kubernetes cluster, and the documented Helm installation requirements specify Kubernetes 1.21 or later and Helm 3.6.3 or later. · openfunction.dev, 7 Oct 2026
Integrations
Its BaaS integration uses Dapr and currently supports the pub/sub and bindings building blocks. · openfunction.dev, 7 Oct 2026
Known limitation
The FAQ says per-revision hard concurrency limits for Knative Serving are not currently supported by OpenFunction. · openfunction.dev, 7 Oct 2026
Languages
The sync-function examples cover Go, Node.js, Python, Java, and .NET. · openfunction.dev, 7 Oct 2026
License
OpenFunction is licensed under the Apache License, Version 2.0. · openfunction.dev, 7 Oct 2026
Networking
OpenFunction Gateway is based on Kubernetes Gateway API and can use compatible gateway implementations such as Contour, Istio, and Apache APISIX. · openfunction.dev, 7 Oct 2026
Notable limitation
The FAQ says private image repository access using certain insecure configurations is not supported directly by Cloud Native Buildpacks and gives a workaround. · openfunction.dev, 7 Oct 2026
Project status and license
The GitHub repository identifies OpenFunction as a CNCF Sandbox project and lists an Apache-2.0 license. · github.com, 7 Oct 2026
Purpose
OpenFunction is a cloud-native open-source FaaS platform for running serverless workloads from function source code. · openfunction.dev, 7 Oct 2026
Requirements
The installation guide lists Kubernetes version >=v1.21.0-0 and Helm version >=v3.6.3 as requirements. · openfunction.dev, 7 Oct 2026
Runtime components
The installation guide offers options to install all components, serving without build, the Knative sync runtime, or the OpenFunction async runtime. · openfunction.dev, 7 Oct 2026
Scaling
The project lists autoscaling from zero to N and event-source-metric-based autoscaling for async functions among its features. · openfunction.dev, 7 Oct 2026
Support resources
The project directs users to its documentation and FAQ and provides community contact, calls, and events through its repository. · github.com, 7 Oct 2026
What it does
OpenFunction is a cloud-native, open-source Function as a Service platform for running functions without managing their underlying runtime environment and infrastructure. · openfunction.dev, 7 Oct 2026

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