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DevOps & observability · #kubernetes
In Kubernetes, scheduling refers to making sure that Pods are matched to Nodes so that Kubelet can run them. Scheduling overview A scheduler watches for newly created Pods that have no Node assigned. For every Pod that the scheduler discovers, the scheduler becomes responsible for finding the best N
Started · 14 Jan 2025, 07:16 UTC
A container image represents binary data that encapsulates an application and all its software dependencies. Container images are executable software bundles that can run standalone and that make very well-defined assumptions about their runtime environment. You typically create a container image of
Kubernetes runs your workload by placing containers into Pods to run on Nodes . A node may be a virtual or physical machine, depending on the cluster. Each node is managed by the control plane and contains the services necessary to run Pods . Typically you have several nodes in a cluster; in a learn
The Kubernetes API lets you query and manipulate the state of objects in Kubernetes. The core of Kubernetes' control plane is the API server and the HTTP API that it exposes. Users, the different parts of your cluster, and external components all communicate with one another through the API server.
You can visualize and manage Kubernetes objects with more tools than kubectl and the dashboard. A common set of labels allows tools to work interoperably, describing objects in a common manner that all tools can understand. In addition to supporting tooling, the recommended labels describe applicati
Use kubeconfig files to organize information about clusters, users, namespaces, and authentication mechanisms. The kubectl command-line tool uses kubeconfig files to find the information it needs to choose a cluster and communicate with the API server of a cluster. Note: A file that is used to confi
This page describes optional DRA features for advanced use cases. Some of these features require support from the DRA driver. Each feature notes its maturity and the feature gate that enables it. Partitionable devices Feature state: Beta since Kubernetes v1.36; enabled by default Devices represented
Resource Allocation Trade‑offs In Kubernetes, the relationship between resource requests and limits defines a pod’s Quality of Service (QoS) class. Setting requests equal to limits yields a Guaranteed pod, protecting it from eviction during node memory pressure. Setting requests lower than limits creates a Burstable pod, allowing it to use spare node capacit
Networking is a central part of Kubernetes, but it can be challenging to understand exactly how it is expected to work. There are 4 distinct networking problems to address: Highly-coupled container-to-container communications: this is solved by Pods and localhost communications. Pod-to-Pod communica