gateway-api VS community

It has already been a couple of years since the Kubernetes Ingress was defined as a “frozen” feature while further development will be added to the Gateway API.

Kubernetes provides two APIs to achieve this, the Ingress API and the Gateway API.

With all that said, K8s is not really meant to function as an API gateway to arbitrary services. You should look into API gateways such as NGINX, Kong or others, service meshes as others have already pointed out, or have a look at the K8s Gateway API the SIG is currently working on. The last one is in the early stages of adoption, but it could provide you with a nice way to do an API Gateway right in K8s.

Maybe there's something in the new fangled gateways.

Keep an eye on the Gateway API GAMMA Initiative as it is currently evolving with the goal of streamlining how services meshes can implement the Gateway API and reduce some overlap.

The selling point for me was ability to configure it using Kubernetes CRD's and future support of the Gateway API (under development - <https://gateway-api.sigs.k8s.io/>).

Developers can version their API now within helm charts or even yaml templates held along the code in their repositories.

-- https://gateway-api.sigs.k8s.io

While you're learning about ingresses, also look into the k8s Gateway API, which is the next generation. https://gateway-api.sigs.k8s.io/

The GatewayAPI model is quite different from the LB/ingress model, in the cluster it consists of gateway and route objects. Once the gateway is created routes connecting gateways to services are added. If you need to change how requests are distributed, the routes are updated but the gateway remains so the address and other configuration remains consistent. Gateways can be shared by multiple routes. Take a look at https://gateway-api.sigs.k8s.io/ its a bit terse but you will get the picture.

Multiple container runtimes are supported, like conatinerd, cri-o, or other CRI compliant runtimes.

More recently, the Kubernetes SIG Network has been evolving the Gateway API to support service meshes.

https://github.com/kubernetes/kubernetes https://www.kubernetes.dev/resources/calendar/ https://github.com/kubernetes/community/blob/master/governance.md https://github.com/kubernetes/steering https://github.com/kubernetes/community/blob/master/sig-list.md

According to this doc it takes the average of CPU utilization of a pod (average across the last 1 minute) divided by the CPU requested by the pod. Then it computes the arithmetic mean of all the pods' CPU.

metrics-server has not supported kubectl top Resource Metrics API

With the Gateway API being a superset of the Ingress API, it might make sense to consolidate both. Thanks to the SIG Network community, Gateway API is still growing and will soon be production ready.

Projects in/around Kubernetes and the CNCF are generally where I spend what little time I can these days. Most communities are incredibly welcoming and provide timely feedback. But the problem space of "managing a cloud platform" can take several years to really wrap ones head around, setting aside focused topics via SIGs like networking, storage, observability, API design, etc.

Krew is a plugin manager maintained by the Kubernetes Special Interest Group (SIG) CLI community. Krew makes it easy to use kubectl plugins and helps you discover, install, and manage them on your machine. It is similar to tools like apt, dnf, or brew. Today, over 200 kubectl plugins are available on Krew - and that number is only increasing. Some projects are actively used and some get deprecated over time, but are still accessible via Krew.

[1] https://k8s.devstats.cncf.io/d/9/companies-table?orgId=1&var-period_name=Last%20decade&var-metric=contributions [2] https://kubernetes.io/releases/release/ [3] https://github.com/kubernetes/community/blob/master/governance.md [4] https://github.com/kubernetes/community/blob/master/sig-list.md