kubeadm upgrade is a user-friendly command that wraps complex upgrading logic behind one command, with support for both planning an upgrade and actually performing it. kubeadm upgrade guidance The steps for performing an upgrade using kubeadm are outlined in this document. For older versions of kubeadm, please refer to older documentation sets of the Kubernetes website. You can use kubeadm upgrade diff to see the changes that would be applied to static pod manifests.

This command initializes a Kubernetes worker node and joins it to the cluster. Run this on any machine you wish to join an existing cluster Synopsis When joining a kubeadm initialized cluster, we need to establish bidirectional trust. This is split into discovery (having the Node trust the Kubernetes Control Plane) and TLS bootstrap (having the Kubernetes Control Plane trust the Node). There are 2 main schemes for discovery. The first is to use a shared token along with the IP address of the API server.

Synopsis Delete the specified cluster from the kubeconfig. kubectl config delete-cluster NAME Examples # Delete the minikube cluster kubectl config delete-cluster minikube Options -h, --help help for delete-cluster --as string Username to impersonate for the operation. User could be a regular user or a service account in a namespace. --as-group strings Group to impersonate for the operation, this flag can be repeated to specify multiple groups. --as-uid string UID to impersonate for the operation.

Synopsis Print the supported API versions on the server, in the form of "group/version". kubectl api-versions Examples # Print the supported API versions kubectl api-versions Options -h, --help help for api-versions --as string Username to impersonate for the operation. User could be a regular user or a service account in a namespace. --as-group strings Group to impersonate for the operation, this flag can be repeated to specify multiple groups.

Synopsis Execute a command in a container. kubectl exec (POD | TYPE/NAME) [-c CONTAINER] [flags] -- COMMAND [args...] Examples # Get output from running the 'date' command from pod mypod, using the first container by default kubectl exec mypod -- date # Get output from running the 'date' command in ruby-container from pod mypod kubectl exec mypod -c ruby-container -- date # Switch to raw terminal mode; sends stdin to 'bash' in ruby-container from pod mypod # and sends stdout/stderr from 'bash' back to the client kubectl exec mypod -c ruby-container -i -t -- bash -il # List contents of /usr from the first container of pod mypod and sort by modification time # If the command you want to execute in the pod has any flags in common (e.

Note This tutorial applies only for new clusters. Pod Security is an admission controller that carries out checks against the Kubernetes Pod Security Standards when new pods are created. It is a feature GA'ed in v1.25. This tutorial shows you how to enforce the baseline Pod Security Standard at the cluster level which applies a standard configuration to all namespaces in a cluster. To apply Pod Security Standards to specific namespaces, refer to Apply Pod Security Standards at the namespace level.

The Kubernetes API server provides API endpoints to indicate the current status of the API server. This page describes these API endpoints and explains how you can use them. API endpoints for health The Kubernetes API server provides 3 API endpoints (healthz, livez and readyz) to indicate the current status of the API server. The healthz endpoint is deprecated (since Kubernetes v1.16), and you should use the more specific livez and readyz endpoints instead.

This section of the Kubernetes documentation contains references. API Reference Glossary - a comprehensive, standardized list of Kubernetes terminology Kubernetes API Reference One-page API Reference for Kubernetes v1.30 Using The Kubernetes API - overview of the API for Kubernetes. API access control - details on how Kubernetes controls API access Well-Known Labels, Annotations and Taints Officially supported client libraries To call the Kubernetes API from a programming language, you can use client libraries.

kubeadm certs provides utilities for managing certificates. For more details on how these commands can be used, see Certificate Management with kubeadm. kubeadm certs A collection of operations for operating Kubernetes certificates. overview Commands related to handling kubernetes certificates Synopsis Commands related to handling kubernetes certificates kubeadm certs [flags] Options -h, --help help for certs Options inherited from parent commands --rootfs string [EXPERIMENTAL] The path to the 'real' host root filesystem.

Synopsis Update the annotations on one or more resources. All Kubernetes objects support the ability to store additional data with the object as annotations. Annotations are key/value pairs that can be larger than labels and include arbitrary string values such as structured JSON. Tools and system extensions may use annotations to store their own data. Attempting to set an annotation that already exists will fail unless --overwrite is set. If --resource-version is specified and does not match the current resource version on the server the command will fail.