Overview Package v1beta3 defines the v1beta3 version of the kubeadm configuration file format. This version improves on the v1beta2 format by fixing some minor issues and adding a few new fields. A list of changes since v1beta2: The deprecated "ClusterConfiguration.useHyperKubeImage" field has been removed. Kubeadm no longer supports the hyperkube image. The "ClusterConfiguration.dns.type" field has been removed since CoreDNS is the only supported DNS server type by kubeadm. Include "datapolicy" tags on the fields that hold secrets.

Resource Types Preference Preference Preference stores elements of KubeRC configuration file FieldDescription apiVersionstringkubectl.config.k8s.io/v1beta1 kindstringPreference defaults [Required] []CommandDefaults defaults allow changing default option values of commands. This is especially useful, when user doesn't want to explicitly set options each time. aliases [Required] []AliasOverride aliases allow defining command aliases for existing kubectl commands, with optional default option values. If the alias name collides with a built-in command, built-in command always takes precedence. Option overrides defined in the defaults section do NOT apply to aliases for the same command.

Production-Grade Container Orchestration

Mechanisms for accessing metrics at node, volume, pod and container level, as seen by the kubelet.

kubeadm kubeconfig provides utilities for managing kubeconfig files. For examples on how to use kubeadm kubeconfig user see Generating kubeconfig files for additional users. kubeadm kubeconfig overview Synopsis Kubeconfig file utilities. Options -h, --help help for kubeconfig Options inherited from parent commands --rootfs string The path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path. kubeadm kubeconfig user This command can be used to output a kubeconfig file for an additional user.

During kubeadm init, kubeadm uploads the ClusterConfiguration object to your cluster in a ConfigMap called kubeadm-config in the kube-system namespace. This configuration is then read during kubeadm join, kubeadm reset and kubeadm upgrade. You can use kubeadm config print to print the default static configuration that kubeadm uses for kubeadm init and kubeadm join. Note:The output of the command is meant to serve as an example. You must manually edit the output of this command to adapt to your setup.

Synopsis Set a context entry in kubeconfig. Specifying a name that already exists will merge new fields on top of existing values for those fields. kubectl config set-context [NAME | --current] [--cluster=cluster_nickname] [--user=user_nickname] [--namespace=namespace] Examples # Set the user field on the gce context entry without touching other values kubectl config set-context gce --user=cluster-admin Options --cluster string cluster for the context entry in kubeconfig --current Modify the current context

FEATURE STATE: Kubernetes v1.33 [beta] Kubernetes 1.34 includes optional declarative validation for APIs. When enabled, the Kubernetes API server can use this mechanism rather than the legacy approach that relies on hand-written Go code (validation.go files) to ensure that requests against the API are valid. Kubernetes developers, and people extending the Kubernetes API, can define validation rules directly alongside the API type definitions (types.go files). Code authors define special comment tags (e.

The Common Expression Language (CEL) is used in the Kubernetes API to declare validation rules, policy rules, and other constraints or conditions. CEL expressions are evaluated directly in the API server, making CEL a convenient alternative to out-of-process mechanisms, such as webhooks, for many extensibility use cases. Your CEL expressions continue to execute so long as the control plane's API server component remains available. Language overview The CEL language has a straightforward syntax that is similar to the expressions in C, C++, Java, JavaScript and Go.

FEATURE STATE: Kubernetes v1.18 [stable] Bootstrap tokens are a simple bearer token that is meant to be used when creating new clusters or joining new nodes to an existing cluster. It was built to support kubeadm, but can be used in other contexts for users that wish to start clusters without kubeadm. It is also built to work, via RBAC policy, with the kubelet TLS Bootstrapping system. Bootstrap Tokens Overview Bootstrap Tokens are defined with a specific type (bootstrap.