Go-Safeweb

Not sure how I feel about the HTTPS/TLS related bits. These days anything I write in Go uses plain HTTP, and the TLS is done by a reverse proxy of some variety that does some other stuff with the traffic too including security headers, routing for different paths to different services, etc. I never run a go web application "bare", public facing, and manually supplying cert files.

I suspect this is partially from google's internal 0 trust cluster networking.

I.e. even if the communication is entirely between components inside a k8s (or borg) cluster, it should be authenticated and encrypted.

In this model, there may be a reverse proxy at the edge of the cluster, but the communication between this service and the internal services wouls still be https. With systems like cert-manager it's also incredibly easy to supply every in-cluster process with a certificate form the cluster-internal CA.

-- Googler, not related to this project

Why wouldn’t you use istio or cilium for this?

Why add another layer if you aren't already using istio or cilium?

Because it’s zero configuration auto mtls between all the services in your cluster (or intra-node if cillium) instead of managing a tls cert for every service?

Zero to little configuration at point of use, but a lot of upfront configuration, maintenance, fun issues when you need something slightly less traditional (e.g. something that needs raw TCP or heavens forbid, UDP). Different trade offs for different situations.

I still think it’s far less than managing tls per service.

Every component needs a different tls configuration, vs one time installing istio.

Raw TCP is supported by istio even with mtls, you just have to match in your VirtualServices on SNI instead of Host header.

We routinely mix tcp and http services on the same external ports, with mtls for both.

UDP I don’t really see how is relevant to a conversation on tls