This is a weird article. It’s titled “how to use vsock” but 95% is how to set up Bazel, gRPC, and building a C++ project. And then 5% is a link to an off-site Twitter thread of screenshots for setting up a Linux VM image and running that in qemu.

This should have been a VM with a basic server and socat’ing the vsocket. I don’t know why so much space was dedicated to unrelated topics. Also zero qualifications or benchmarks for “fast” compared to tcp/virtio.

Author says “no ssh keys” when ssh is an orthogonal concept. sshd can listen on a vsock interface, it’s not specific to tcp/ip.

From the “Under the hood” section, which should be the part actually about vsock:

> I haven’t delved into the low-level system API for vsocks, as frameworks typically abstract this away.