Knative : the easy way to serverless a java app

Hi everyone 🙋🏻‍♂️,

Let me introduce you Knative, a friend (or extension) of Kubernetes ☸, an easy way to stop apps when not used and so, save our planet 🌏 from CO₂ attack!

Works out of the box for a Docker/OCI image of a serving app (like a REST app), but needs some changes for event consumers one's.

As the app starts on first request, is better to have a rabbit 🐰 startup performance level degree than a tortoise's 🐢 one (only works in this case 🏁). In Java ☕️ apps, native-images comes to rescue 🚀 (more about that in the next post).

You can see a working example of Knative serving a native java REST app in this interactive Katacoda tutorial, or if you are a lucky 🇫🇷French🇫🇷 speaker, you can simply watch this demo video:

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Cheers 🍻

Resources

• Knative
• Interactive Katacoda tutorial
• GraalVM
• native-images
• Spring Native (experimental)