Synopsis Update environment variables on a pod template. List environment variable definitions in one or more pods, pod templates. Add, update, or remove container environment variable definitions in one or more pod templates (within replication controllers or deployment configurations). View or modify the environment variable definitions on all containers in the specified pods or pod templates, or just those that match a wildcard. If "--env -" is passed, environment variables can be read from STDIN using the standard env syntax.

Synopsis Display resource (CPU/memory) usage of nodes. The top-node command allows you to see the resource consumption of nodes. kubectl top node [NAME | -l label] Examples # Show metrics for all nodes kubectl top node # Show metrics for a given node kubectl top node NODE_NAME Options -h, --help help for node --no-headers If present, print output without headers -l, --selector string Selector (label query) to filter on, supports '=', '==', '!

There are two official Kubernetes blogs, and the CNCF has its own blog where you can cover Kubernetes too. For the main Kubernetes blog, we (the Kubernetes project) like to publish articles with different perspectives and special focuses, that have a link to Kubernetes. With only a few special case exceptions, we only publish content that hasn't been submitted or published anywhere else. Writing for the Kubernetes blog(s) As an author, you have three different routes towards publication.

The Kubernetes documentation follows several types of page content: Concept Task Tutorial Reference Content sections Each page content type contains a number of sections defined by Markdown comments and HTML headings. You can add content headings to your page with the heading shortcode. The comments and headings help maintain the structure of the page content types. Examples of Markdown comments defining page content sections: <!-- overview --> <!-- body --> To create common headings in your content pages, use the heading shortcode with a heading string.

There are two official Kubernetes blogs, and the CNCF has its own blog where you can cover Kubernetes too. Read contributing to Kubernetes blogs to learn about these two blogs. When people contribute to either blog as an author, the Kubernetes project pairs up authors as writing buddies. This page explains how to fulfil the buddy role. You should make sure that you have at least read an outline of article submission before you read on within this page.

This page contains an overview of the various feature gates an administrator can specify on different Kubernetes components. See feature stages for an explanation of the stages for a feature. Overview Feature gates are a set of key=value pairs that describe Kubernetes features. You can turn these features on or off using the --feature-gates command line flag on each Kubernetes component. How to enable Feature Gates To enable or disable a feature gate for a particular Kubernetes component, use the --feature-gates flag.

Production-Grade Container Orchestration

Resource Types AdmissionReview AdmissionReview AdmissionReview describes an admission review request/response. FieldDescription apiVersionstringadmission.k8s.io/v1 kindstringAdmissionReview request AdmissionRequest Request describes the attributes for the admission request. response AdmissionResponse Response describes the attributes for the admission response. AdmissionRequest Appears in: AdmissionReview AdmissionRequest describes the admission.Attributes for the admission request. FieldDescription uid [Required] k8s.io/apimachinery/pkg/types.UID UID is an identifier for the individual request/response. It allows us to distinguish instances of requests which are otherwise identical (parallel requests, requests when earlier requests did not modify etc) The UID is meant to track the round trip (request/response) between the KAS and the WebHook, not the user request.

Production-Grade Container Orchestration

You can use the Kubernetes command line tool kubectl to interact with the API Server. Using kubectl is straightforward if you are familiar with the Docker command line tool. However, there are a few differences between the Docker commands and the kubectl commands. The following sections show a Docker sub-command and describe the equivalent kubectl command. docker run To run an nginx Deployment and expose the Deployment, see kubectl create deployment.