![]() ![]() In order to facilitate the use of different runtimes, the kubelet communicates with the container runtime through a standardized Container Runtime Interface (or CRI). Kubelet : A kubelet runs on every node and mediates between the control plane and the node in question, passing instructions to the container runtime-”Start this workload!”-and then monitoring the status of the job. Today, Kubernetes supports a variety of runtimes, including containerd, CRI-O, Mirantis Container Runtime, and others. Those components include:Ī container runtime : This is the component that actually runs containers on a node. Last time, we noted that our Minikube cluster is a single-node cluster, meaning that it consists of only one machine–typically a containerized or virtual machine running on our laptop or desktop.Īny node might need to step up and run workloads at any time, so the components required to make that happen are found on every node. A node is simply a compute resource: it can be either a virtual or physical computer. ![]() The Architecture of a Kubernetes Cluster ←You are hereĪ Kubernetes cluster is made up of nodes. Setting Up a Kubernetes Learning Environment Multi-Container Apps on User-Defined Networks In this lesson, we’ll explore the architecture of a Kubernetes cluster: its core components, how they interact with one another, and how we interact with them.Ĭreating, Observing, and Deleting ContainersĬontainer Networking and Opening Container Ports Last time, we set up a local Kubernetes environment and learned three different ways to interact with a cluster: the kubectl command line tool, the Kubernetes Web Dashboard, and the Lens IDE. These lessons assume a basic familiarity with the Linux command line and a Unix-like operating system-beyond that, you don’t need any special preparation to get started. In this series, we’ll break down core cloud native concepts, challenges, and best practices into short, manageable exercises and explainers, so you can learn five minutes at a time. One of the biggest challenges for implementing cloud native technologies is learning the fundamentals-especially when you need to fit your learning into a busy schedule.
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