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Dynamic Kubelet Configuration

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Alpha implementation of the Dynamic Kubelet Configuration feature.
See the proposal doc in #29459.
This commit is contained in:
Michael Taufen
2017-04-28 15:08:57 -07:00
parent d37f2f1a5d
commit 443d58e40a
85 changed files with 6042 additions and 370 deletions
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1
pkg/api/register.go
View File

@@ -85,6 +85,7 @@ func addKnownTypes(scheme *runtime.Scheme) error {
&ServiceProxyOptions{},
&NodeList{},
&Node{},
&NodeConfigSource{},
&NodeProxyOptions{},
&Endpoints{},
&EndpointsList{},

13
pkg/api/types.go
View File

@@ -2913,6 +2913,19 @@ type NodeSpec struct {
// If specified, the node's taints.
// +optional
Taints []Taint
// If specified, the source to get node configuration from
// The DynamicKubeletConfig feature gate must be enabled for the Kubelet to use this field
// +optional
ConfigSource *NodeConfigSource
}
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
// NodeConfigSource specifies a source of node configuration. Exactly one subfield must be non-nil.
type NodeConfigSource struct {
metav1.TypeMeta
ConfigMapRef *ObjectReference
}
// DaemonEndpoint contains information about a single Daemon endpoint.

15
pkg/api/validation/validation.go
View File

@@ -3338,6 +3338,11 @@ func ValidateNode(node *api.Node) field.ErrorList {
allErrs = append(allErrs, field.Required(field.NewPath("spec", "externalID"), ""))
}
// Only allow Node.Spec.ConfigSource to be set if the DynamicKubeletConfig feature gate is enabled
if node.Spec.ConfigSource != nil && !utilfeature.DefaultFeatureGate.Enabled(features.DynamicKubeletConfig) {
allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "configSource"), "configSource may only be set if the DynamicKubeletConfig feature gate is enabled)"))
}
// TODO(rjnagal): Ignore PodCIDR till its completely implemented.
return allErrs
}
@@ -3365,7 +3370,7 @@ func ValidateNodeUpdate(node, oldNode *api.Node) field.ErrorList {
allErrs = append(allErrs, ValidateResourceQuantityValue(string(k), v, resPath)...)
}
// Validte no duplicate addresses in node status.
// Validate no duplicate addresses in node status.
addresses := make(map[api.NodeAddress]bool)
for i, address := range node.Status.Addresses {
if _, ok := addresses[address]; ok {
@@ -3398,10 +3403,16 @@ func ValidateNodeUpdate(node, oldNode *api.Node) field.ErrorList {
}
oldNode.Spec.Taints = node.Spec.Taints
// Allow updates to Node.Spec.ConfigSource if DynamicKubeletConfig feature gate is enabled
if utilfeature.DefaultFeatureGate.Enabled(features.DynamicKubeletConfig) {
oldNode.Spec.ConfigSource = node.Spec.ConfigSource
}
// We made allowed changes to oldNode, and now we compare oldNode to node. Any remaining differences indicate changes to protected fields.
// TODO: Add a 'real' error type for this error and provide print actual diffs.
if !apiequality.Semantic.DeepEqual(oldNode, node) {
glog.V(4).Infof("Update failed validation %#v vs %#v", oldNode, node)
allErrs = append(allErrs, field.Forbidden(field.NewPath(""), "node updates may only change labels, taints or capacity"))
allErrs = append(allErrs, field.Forbidden(field.NewPath(""), "node updates may only change labels, taints, or capacity (or configSource, if the DynamicKubeletConfig feature gate is enabled)"))
}
return allErrs