This Week in Fluvio #2

Welcome to the second edition of This Week in Fluvio, our weekly newsletter for development updates to Fluvio open source. Fluvio is a distributed, programmable streaming platform written in Rust.

In 0.9.1, we added support for running a Fluvio cluster locally on an Apple M1 machine (architecture aarch64-apple-darwin). This means that if you are running an M1-powered device, you can now install Fluvio and run a cluster directly on your machine, without needing to deploy to some Kubernetes instance somewhere.

On M1, you can now run the standard install.sh script and get both the Fluvio CLI and the fluvio-run cluster binary:

$ curl -fsS https://hub.infinyon.cloud/install/install.sh | bash

After this has run (and you’ve set up your PATH), you can now run a local cluster on M1 with the following command:

$ fluvio cluster start --local

See our complete getting-started guide for Mac for a full set of instructions for getting set up from scratch.

That’s right, we had two point releases this week. 0.9.2 was shipped because of a bug we discovered with a version handshake between Fluvio clients and servers that is supposed to ensure compatibility.

Basically, each build of Fluvio “knows” what version it is, e.g. 0.9.0 or 0.9.1. When a Fluvio client and server first connect, they make sure that they each have versions that are compatible with each other. Unfortunately, we had a build problem where the server (Fluvio SC) did not pick up the latest version number, and therefore the client thought it was talking to an old server! It turns out that this bug was present since the update from 0.8.5 to 0.9.0, so the 0.9.x clients thought they were talking to an 0.8.x server. This version gap spanned a major version bump, so the client rejected the connections! We suspect this bug happened because we did not have any code changes to the SC for 0.9.1 or 0.9.2, so it actually did not get recompiled with the new version number baked in. All this to say, we are now back on track with matching versions in the client/server builds.

In addition to these compatibility fixes, 0.9.2 also included some internal fixes to the Streaming Processing Units (SPUs) that should make them more reliable when being deployed in a Kubernetes cluster.

That’s it for this week, short and sweet! If you have any questions or would like to get involved, feel free to join our Discord channel.

Until next week!