February 2026
Intermediate to advanced
372 pages
9h 2m
English
Content preview from Cilium: Up and Running
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Chapter 1. Why Cilium?
Kubernetes is now the accepted standard platform for running cloud native applications. Originating at Google and inspired by the company’s experience with its internal cluster manager Borg, the platform was open sourced in 2014.
Kubernetes transformed containerization, which was already gaining popularity, into a scalable framework for managing distributed systems. It quickly evolved from a container orchestrator into what Brendan Burns, Joe Beda, Kelsey Hightower, and Lachlan Evenson describe as “the standard API for building cloud native applications” and “a proven infrastructure for distributed systems that is suitable for cloud native developers of all scales” in their book Kubernetes: Up and Running (O’Reilly).
The open source nature of Kubernetes has been fundamental to its success. Like Linux before it, Kubernetes thrives thanks to its community of contributors, from individual developers to the largest cloud providers. Google’s decision to donate it to the Cloud Native Computing Foundation (CNCF) gave Kubernetes a neutral home, which in turn enabled it to become the foundation for an entire ecosystem of open source projects.
As use of Kubernetes and containerization spread, one reality became obvious: regardless of the underlying computing platform, workloads have the same basic network and security requirements. Whether you run them on bare metal, virtual machines (VMs), or containers, you expect your applications to:
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Have accessible IP addresses ...
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