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For example, an init container can run to perform setup for a workload before the application container starts. It may seem strange that a pod contains multiple containers, but this approach is fairly common. A pod consists of one or more containers that share certain namespaces. The basic unit of work in a Kubernetes cluster is a pod, which provides an ideal starting point for understanding Kubernetes networking. While a deep understanding is rarely needed to operate the average Kubernetes cluster, this knowledge can better position you to maintain and troubleshoot workloads running in Kubernetes. These articles will focus on digging into the concepts by using tools such as packet captures to truly understand the traffic that traverses the wire.
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In this series of articles, I will take you through different layers of the Kubernetes network stack to see how containers, pods, and nodes communicate. This makes it harder to reason about the complex network topologies that typically accompany a Kubernetes environment. While very basic network skills are part of every sysadmin's toolbox, it's rarer for systems administrators to have a deep understanding of networking. Get started with Red Hat OpenShift Service on AWSĪccommodating a microservices paradigm where services rely heavily on the network for communication requires extensive knowledge of networking fundamentals.Interactive course: Create a cluster in Red Hat OpenShift Service on AWS with S….Interactive course: Getting started with OpenShift.