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minikube/docs/configuring_kubernetes.md

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Configuring Kubernetes

Minikube has a "configurator" feature that allows users to configure the Kubernetes components with arbitrary values. To use this feature, you can use the --extra-config flag on the minikube start command.

This flag is repeated, so you can pass it several times with several different values to set multiple options.

Kubeadm bootstrapper

The kubeadm bootstrapper can be configured by the --extra-config flag on the minikube start command. It takes a string of the form component.key=value where component is one of the strings

  • kubelet
  • apiserver
  • controller-manager
  • scheduler

and key=value is a flag=value pair for the component being configured. For example,

minikube start --extra-config=apiserver.v=10 --extra-config=kubelet.max-pods=100

Localkube

The configurator interpretes the --extra-config flags differently for localkube.

This flag takes a string of the form component.key=value, where component is one of the strings from the list below, key is a value on the configuration struct and value is the value to set.

Valid keys can be found by examining the documentation for the Kubernetes componentconfigs for each component. Here is the documentation for each supported configuration:

You can enable feature gates for alpha and experimental features with the --feature-gates flag on minikube start. As of v1.5.1, the options are:

  • AllAlpha=true|false (ALPHA - default=false)
  • AllowExtTrafficLocalEndpoints=true|false (BETA - default=true)
  • AppArmor=true|false (BETA - default=true)
  • DynamicKubeletConfig=true|false (ALPHA - default=false)
  • DynamicVolumeProvisioning=true|false (ALPHA - default=true)
  • ExperimentalHostUserNamespaceDefaulting=true|false (ALPHA - default=false)
  • StreamingProxyRedirects=true|false (ALPHA - default=false)

Note: All alpha and experimental features are not guaranteed to work with minikube.

Examples

To change the MaxPods setting to 5 on the Kubelet, pass this flag: --extra-config=kubelet.MaxPods=5.

This feature also supports nested structs. To change the LeaderElection.LeaderElect setting to true on the scheduler, pass this flag: --extra-config=scheduler.LeaderElection.LeaderElect=true.

To set the AuthorizationMode on the apiserver to RBAC, you can use: --extra-config=apiserver.Authorization.Mode=RBAC.

To enable all alpha feature gates, you can use: --feature-gates=AllAlpha=true