I’m using headscale with headplane as the UI, looks like tailscale, is feature complete (at least it says so on their GitHub readme). Headplane even integrates with an external OIDC provider (I self-host Keycloak for centralized identity management across my services).

Only mechanically. You could technically remove the small piece of plastic at the end of the slot, and still put a x16 card in a x1 or x4 slot, should work anyways. Some mainboards even have open-ended slots directly instead of closed ended. Haven’t done it and wouldn’t recommend it, but it would technically be possible.

I’m on Keycloak + lldap for user provisioning and services that don’t support OIDC or SAML. I have yet to find a OAuth or SAML feature it doesn’t have. It does have a steep learning curve tho, so Authentik is maybe a better solution to get started with.

I personally hit a wall with Authentik when I was trying to get different signature key algorithms for different services (some services have different supported set of key algorithms than others) and custom plugins for custom JWT fields and user attributes.

I believe Authentik has something for extensions as well, but Keycloak is just Java, which has a much better development and deployment experience than throwing a .py or .js file in some directory and hoping it works.

I’m using istio (in ambient mode, so it doesn’t put its sidecar into every pod I create), and Nextcloud behind it, works flawlessly. It does consume a bit of time to set up properly though.

TLS certificates are handled via cert-manager, which works with both Ingress and Gateway API, independent of which implementation you choose.

I’ve also tried envoy gateway (had issues with uploading larger files via Nextcloud Web UI and Gradle publish to maven repo).

Cilium (a CNI) also has an integrated Gateway and Ingress API implementation, works fine, but lacks some of the most recent stable features, and quite some experimental features. But if you just need a HTTPS gateway without much fuss, it’s rock-solid. Setup time is also minimal for the Ingress/Gateway controller part. Cilium CNI on the other hand takes a lot of time to understand and configure, if you’re unfamiliar with networking in general.

Traefik’s featureset is comparable with Cilium’s Gateway API implementation, also works, simple to setup, and might be better suited, if you’re already familiar with it using docker, as it’s the same concepts, just slightly different config (docker labels vs. Ingress/Gateway API with Traefik specific annotations).

Traefik also supports running on K8s, yes.

On that note, if you’re moving to K8s, I recommend looking into K8s Gateway API, it’s the successor to the old Ingress API. There are other, more complete, implementations of it than Traefik. See https://gateway-api.sigs.k8s.io/

Caddy or Traefik, depending on whether you want quick and simple (Caddy), or integration with docker, so you don’t have to write config files by hand (Traefik)