Fix some typos and omissions in kubeadm APIs

cmd/kubeadm/app/apis/kubeadm/types.go

@@ -131,6 +131,8 @@ type ClusterConfiguration struct {
 // ControlPlaneComponent holds settings common to control plane component of the cluster
 type ControlPlaneComponent struct {
 	// ExtraArgs is an extra set of flags to pass to the control plane component.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	// TODO: This is temporary and ideally we would like to switch all components to
 	// use ComponentConfig + ConfigMaps.
 	ExtraArgs map[string]string
@@ -213,6 +215,8 @@ type NodeRegistrationOptions struct {
 	// KubeletExtraArgs passes through extra arguments to the kubelet. The arguments here are passed to the kubelet command line via the environment file
 	// kubeadm writes at runtime for the kubelet to source. This overrides the generic base-level configuration in the kubelet-config-1.X ConfigMap
 	// Flags have higher priority when parsing. These values are local and specific to the node kubeadm is executing on.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	KubeletExtraArgs map[string]string
 
 	// IgnorePreflightErrors provides a slice of pre-flight errors to be ignored when the current node is registered.
@@ -276,6 +280,8 @@ type LocalEtcd struct {
 
 	// ExtraArgs are extra arguments provided to the etcd binary
 	// when run inside a static pod.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	ExtraArgs map[string]string
 
 	// ServerCertSANs sets extra Subject Alternative Names for the etcd server signing cert.

cmd/kubeadm/app/apis/kubeadm/v1beta2/doc.go

@@ -121,7 +121,7 @@ limitations under the License.
 // including settings for:
 //
 // - Networking, that holds configuration for the networking topology of the cluster; use it e.g. to customize
-// node subnet or services subnet.
+// pod subnet or services subnet.
 //
 // - Etcd configurations; use it e.g. to customize the local etcd or to configure the API server
 // for using an external etcd cluster.

cmd/kubeadm/app/apis/kubeadm/v1beta2/types.go

@@ -116,6 +116,8 @@ type ClusterConfiguration struct {
 // ControlPlaneComponent holds settings common to control plane component of the cluster
 type ControlPlaneComponent struct {
 	// ExtraArgs is an extra set of flags to pass to the control plane component.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	// TODO: This is temporary and ideally we would like to switch all components to
 	// use ComponentConfig + ConfigMaps.
 	ExtraArgs map[string]string `json:"extraArgs,omitempty"`
@@ -207,6 +209,8 @@ type NodeRegistrationOptions struct {
 	// KubeletExtraArgs passes through extra arguments to the kubelet. The arguments here are passed to the kubelet command line via the environment file
 	// kubeadm writes at runtime for the kubelet to source. This overrides the generic base-level configuration in the kubelet-config-1.X ConfigMap
 	// Flags have higher priority when parsing. These values are local and specific to the node kubeadm is executing on.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	KubeletExtraArgs map[string]string `json:"kubeletExtraArgs,omitempty"`
 
 	// IgnorePreflightErrors provides a slice of pre-flight errors to be ignored when the current node is registered.
@@ -268,6 +272,8 @@ type LocalEtcd struct {
 
 	// ExtraArgs are extra arguments provided to the etcd binary
 	// when run inside a static pod.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	ExtraArgs map[string]string `json:"extraArgs,omitempty"`
 
 	// ServerCertSANs sets extra Subject Alternative Names for the etcd server signing cert.

cmd/kubeadm/app/apis/kubeadm/v1beta3/doc.go

@@ -120,7 +120,7 @@ limitations under the License.
 // including settings for:
 //
 // - Networking, that holds configuration for the networking topology of the cluster; use it e.g. to customize
-// node subnet or services subnet.
+// pod subnet or services subnet.
 //
 // - Etcd configurations; use it e.g. to customize the local etcd or to configure the API server
 // for using an external etcd cluster.

cmd/kubeadm/app/apis/kubeadm/v1beta3/types.go

@@ -133,6 +133,8 @@ type ClusterConfiguration struct {
 // ControlPlaneComponent holds settings common to control plane component of the cluster
 type ControlPlaneComponent struct {
 	// ExtraArgs is an extra set of flags to pass to the control plane component.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	// TODO: This is temporary and ideally we would like to switch all components to
 	// use ComponentConfig + ConfigMaps.
 	// +optional
@@ -214,6 +216,8 @@ type NodeRegistrationOptions struct {
 	// KubeletExtraArgs passes through extra arguments to the kubelet. The arguments here are passed to the kubelet command line via the environment file
 	// kubeadm writes at runtime for the kubelet to source. This overrides the generic base-level configuration in the kubelet-config-1.X ConfigMap
 	// Flags have higher priority when parsing. These values are local and specific to the node kubeadm is executing on.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	// +optional
 	KubeletExtraArgs map[string]string `json:"kubeletExtraArgs,omitempty"`
 
@@ -287,6 +291,8 @@ type LocalEtcd struct {
 
 	// ExtraArgs are extra arguments provided to the etcd binary
 	// when run inside a static pod.
+	// A key in this map is the flag name as it appears on the
+	// command line except without leading dash(es).
 	// +optional
 	ExtraArgs map[string]string `json:"extraArgs,omitempty"`