February 2026
Intermediate to advanced
372 pages
9h 2m
English
Content preview from Cilium: Up and Running
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Chapter 7. Ingress and Gateway API
In Chapter 6, we saw how Kubernetes services enable applications to be accessible from both within and outside the cluster. While services provide a way to balance incoming traffic at layer 4, however, they lack the native ability to apply granular controls at upper layers. This means that Kubernetes services cannot perform common functions like TLS termination, application (layer 7)-level parsing, and filtering. For that, we need ingress mechanisms.
In this chapter, we’ll explore how Cilium supports both Ingress and its successor, Gateway API. You will learn:
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What they are, how they differ, and when to use each
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How to publish HTTP services with Ingress, including host and path routing and TLS termination
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How Gateway API fits together with GatewayClass, Gateway, and HTTPRoute resources, and how routes attach to listeners
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How to match and route traffic at layer 7 by path, headers, method, and query parameters
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How to run progressive rollouts with traffic splitting (50/50 to 99/1) and validate the results
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How to shape traffic with header edits and HTTP redirects
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How to handle gRPC with GRPCRoute, using service and method matching
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How to route internal traffic with GAMMA (Gateway API for service mesh)
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.