APICallRetryInterval defines how long kubeadm should wait before retrying a failed API operation.

DefaultAdmissionControl specifies the default admission control options that will be used.

DefaultTokenDuration specifies the default amount of time that a bootstrap token will be valid Default behaviour is "never expire" == 0.

DiscoveryRetryInterval specifies how long kubeadm should wait before retrying to connect to the master when doing discovery.

Constants for what we name our ServiceAccounts with limited access to the cluster in case of RBAC.

KubernetesDir is the directory kubernetes owns for storing various configuration files.

LabelNodeRoleMaster specifies that a node is a master It's copied over to kubeadm until it's merged in core: https://github.com/kubernetes/kubernetes/pull/39112.

MinExternalEtcdVersion indicates minimum external etcd version which kubeadm supports.

Minimum amount of nodes the Service subnet should allow.

Important: a "v"-prefix shouldn't exist here; semver doesn't allow that.

DefaultTokenUsages specifies the default functions a token will get.

MasterToleration is the toleration to apply on the PodSpec for being able to run that Pod on the master.