![]() Need to scale up the capacity of your cluster? Add more nodes. Pods are scheduled and orchestrated to run on nodes. Fault-tolerant and distributed, etcd is designed to be the ultimate source of truth about your cluster.Ī Kubernetes cluster needs at least one compute node, but will normally have many. etcdĬonfiguration data and information about the state of the cluster lives in etcd, a key-value store database. And there are controllers for creating accounts and API access tokens. A controller connects services to pods, so requests go to the right endpoints. If a pod goes down, another controller notices and responds. One controller consults the scheduler and makes sure the correct number of pods is running. kube-controller-managerĬontrollers take care of actually running the cluster, and the Kubernetes controller-manager contains several controller functions in one. Then it schedules the pod to an appropriate compute node. The scheduler considers the resource needs of a pod, such as CPU or memory, along with the health of the cluster. Is your cluster healthy? If new containers are needed, where will they fit? These are the concerns of the Kubernetes scheduler. You can access the API through REST calls, through the kubectl command-line interface, or through other command-line tools such as kubeadm. The API server determines if a request is valid and, if it is, processes it. The Kubernetes API is the front end of the Kubernetes control plane, handling internal and external requests. Need to interact with your Kubernetes cluster? Talk to the API. You’ve configured your cluster to run a certain way. The control plane is in constant contact with your compute machines. These core Kubernetes components handle the important work of making sure your containers are running in sufficient numbers and with the necessary resources. Here we find the Kubernetes components that control the cluster, along with data about the cluster’s state and configuration. Attendees will gain hands-on experience building, exploring, and securing real-world systems.Let’s begin in the nerve center of our Kubernetes cluster: The control plane. ![]() This comprehensive course, created by Hacking Kubernetes author and SANS instructor Andrew Martin, explores Kubernetes architecture, security, and delivery through offensive and defensive approaches.įrom building applications into containers and appraising supply chain vulnerabilities, through runtime detection and monitoring, to evading the system’s defences and popping shells in Kubernetes, this course gives you the tools you need to understand how to attack and defend against present and future threat actors.
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