Kubernetes (version 1.3 through to the latest 1.34, and likely onwards) lets you use Container Network Interface (CNI) plugins for cluster networking. You must use a CNI plugin that is compatible with your cluster and that suits your needs. Different plugins are available (both open- and closed- source) in the wider Kubernetes ecosystem. A CNI plugin is required to implement the Kubernetes network model. You must use a CNI plugin that is compatible with the v0.

Learn common tasks for administering a cluster.

System component logs record events happening in cluster, which can be very useful for debugging. You can configure log verbosity to see more or less detail. Logs can be as coarse-grained as showing errors within a component, or as fine-grained as showing step-by-step traces of events (like HTTP access logs, pod state changes, controller actions, or scheduler decisions). Warning:In contrast to the command line flags described here, the log output itself does not fall under the Kubernetes API stability guarantees: individual log entries and their formatting may change from one release to the next!

FEATURE STATE: Kubernetes v1.33 [beta] (enabled by default: false) Kubernetes 1.34 includes a beta feature that allows control plane components to deterministically select a leader via coordinated leader election. This is useful to satisfy Kubernetes version skew constraints during cluster upgrades. Currently, the only builtin selection strategy is OldestEmulationVersion, preferring the leader with the lowest emulation version, followed by binary version, followed by creation timestamp. Enabling coordinated leader election Ensure that CoordinatedLeaderElection feature gate is enabled when you start the API Server: and that the coordination.

Production-Grade Container Orchestration

This page provides a real world example of how to configure Redis using a ConfigMap and builds upon the Configure a Pod to Use a ConfigMap task. Objectives Create a ConfigMap with Redis configuration values Create a Redis Pod that mounts and uses the created ConfigMap Verify that the configuration was correctly applied. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster.

Information on authentication options in Kubernetes and their security properties.

In order to support latency-critical and high-throughput workloads, Kubernetes offers a suite of Resource Managers. The managers aim to co-ordinate and optimise the alignment of node's resources for pods configured with a specific requirement for CPUs, devices, and memory (hugepages) resources. Hardware topology alignment policies Topology Manager is a kubelet component that aims to coordinate the set of components that are responsible for these optimizations. The overall resource management process is governed using the policy you specify.

FEATURE STATE: Kubernetes v1.20 [stable] Kubernetes allow you to limit the number of process IDs (PIDs) that a Pod can use. You can also reserve a number of allocatable PIDs for each node for use by the operating system and daemons (rather than by Pods). Process IDs (PIDs) are a fundamental resource on nodes. It is trivial to hit the task limit without hitting any other resource limits, which can then cause instability to a host machine.

This page shows how to assign a Kubernetes Pod to a particular node in a Kubernetes cluster. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts. If you do not already have a cluster, you can create one by using minikube or you can use one of these Kubernetes playgrounds: