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 Node for that Pod to run on. The scheduler reaches this placement decision taking into account the scheduling principles described below.

The dockershim component of Kubernetes allows the use of Docker as a Kubernetes's container runtime. Kubernetes' built-in dockershim component was removed in release v1.24. This page explains how your cluster could be using Docker as a container runtime, provides details on the role that dockershim plays when in use, and shows steps you can take to check whether any workloads could be affected by dockershim removal. Finding if your app has a dependencies on Docker If you are using Docker for building your application containers, you can still run these containers on any container runtime.

This example demonstrates how to limit the amount of storage consumed in a namespace. The following resources are used in the demonstration: ResourceQuota, LimitRange, and PersistentVolumeClaim. 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.

This page describes the CoreDNS upgrade process and how to install CoreDNS instead of kube-dns. 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:

Objectives Learn about application Deployments. Deploy your first app on Kubernetes with kubectl. Kubernetes Deployments A Deployment is responsible for creating and updating instances of your application. Note:This tutorial uses a container that requires the AMD64 architecture. If you are using minikube on a computer with a different CPU architecture, you could try using minikube with a driver that can emulate AMD64. For example, the Docker Desktop driver can do this.

Production-Grade Container Orchestration

Synopsis Request a service account token. kubectl create token SERVICE_ACCOUNT_NAME Examples # Request a token to authenticate to the kube-apiserver as the service account "myapp" in the current namespace kubectl create token myapp # Request a token for a service account in a custom namespace kubectl create token myapp --namespace myns # Request a token with a custom expiration kubectl create token myapp --duration 10m # Request a token with a custom audience kubectl create token myapp --audience https://example.

Synopsis Create an ingress with the specified name. kubectl create ingress NAME --rule=host/path=service:port[,tls[=secret]] Examples # Create a single ingress called 'simple' that directs requests to foo.com/bar to svc # svc1:8080 with a TLS secret "my-cert" kubectl create ingress simple --rule="foo.com/bar=svc1:8080,tls=my-cert" # Create a catch all ingress of "/path" pointing to service svc:port and Ingress Class as "otheringress" kubectl create ingress catch-all --class=otheringress --rule="/path=svc:port" # Create an ingress with two annotations: ingress.

Synopsis Renames a context from the kubeconfig file. CONTEXT_NAME is the context name that you want to change. NEW_NAME is the new name you want to set. Note: If the context being renamed is the 'current-context', this field will also be updated. kubectl config rename-context CONTEXT_NAME NEW_NAME Examples # Rename the context 'old-name' to 'new-name' in your kubeconfig file kubectl config rename-context old-name new-name Options -h, --help help for rename-context

Synopsis Display the contents of the kuberc file in the specified output format. kubectl alpha kuberc view Examples # View kuberc configuration in YAML format (default) kubectl alpha kuberc view # View kuberc configuration in JSON format kubectl alpha kuberc view --output json # View a specific kuberc file kubectl alpha kuberc view --kuberc /path/to/kuberc Options --allow-missing-template-keys     Default: true If true, ignore any errors in templates when a field or map key is missing in the template.