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Always check if default labels on node need to be updated in kubelet

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This commit is contained in:
Henrik Schmidt
2017-06-06 13:47:40 +02:00
parent 7209cb76bb
commit 80156474cf
3 changed files with 207 additions and 3 deletions
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1
pkg/kubelet/BUILD
View File

@@ -170,6 +170,7 @@ go_test(
"//pkg/api:go_default_library",
"//pkg/api/install:go_default_library",
"//pkg/capabilities:go_default_library",
"//pkg/kubelet/apis:go_default_library",
"//pkg/kubelet/apis/kubeletconfig:go_default_library",
"//pkg/kubelet/cadvisor/testing:go_default_library",
"//pkg/kubelet/cm:go_default_library",

28
pkg/kubelet/kubelet_node_status.go
View File

@@ -137,6 +137,7 @@ func (kl *Kubelet) tryRegisterWithAPIServer(node *v1.Node) bool {
// the value of the controller-managed attach-detach
// annotation.
requiresUpdate := kl.reconcileCMADAnnotationWithExistingNode(node, existingNode)
requiresUpdate = kl.updateDefaultLabels(node, existingNode) || requiresUpdate
if requiresUpdate {
if _, err := nodeutil.PatchNodeStatus(kl.kubeClient, types.NodeName(kl.nodeName),
originalNode, existingNode); err != nil {
@@ -161,6 +162,33 @@ func (kl *Kubelet) tryRegisterWithAPIServer(node *v1.Node) bool {
return false
}
// updateDefaultLabels will set the default labels on the node
func (kl *Kubelet) updateDefaultLabels(initialNode, existingNode *v1.Node) bool {
defaultLabels := []string{
kubeletapis.LabelHostname,
kubeletapis.LabelZoneFailureDomain,
kubeletapis.LabelZoneRegion,
kubeletapis.LabelInstanceType,
kubeletapis.LabelOS,
kubeletapis.LabelArch,
}
var needsUpdate bool = false
//Set default labels but make sure to not set labels with empty values
for _, label := range defaultLabels {
if existingNode.Labels[label] != initialNode.Labels[label] {
existingNode.Labels[label] = initialNode.Labels[label]
needsUpdate = true
}
if existingNode.Labels[label] == "" {
delete(existingNode.Labels, label)
}
}
return needsUpdate
}
// reconcileCMADAnnotationWithExistingNode reconciles the controller-managed
// attach-detach annotation on a new node and the existing node, returning
// whether the existing node must be updated.

179
pkg/kubelet/kubelet_node_status_test.go
View File

@@ -43,6 +43,7 @@ import (
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes/fake"
core "k8s.io/client-go/testing"
kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
"k8s.io/kubernetes/pkg/kubelet/cm"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
"k8s.io/kubernetes/pkg/kubelet/util/sliceutils"
@@ -675,7 +676,14 @@ func TestRegisterWithApiServer(t *testing.T) {
kubeClient.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
// Return an existing (matching) node on get.
return true, &v1.Node{
ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname},
ObjectMeta: metav1.ObjectMeta{
Name: testKubeletHostname,
Labels: map[string]string{
kubeletapis.LabelHostname: testKubeletHostname,
kubeletapis.LabelOS: goruntime.GOOS,
kubeletapis.LabelArch: goruntime.GOARCH,
},
},
Spec: v1.NodeSpec{ExternalID: testKubeletHostname},
}, nil
})
@@ -731,7 +739,13 @@ func TestTryRegisterWithApiServer(t *testing.T) {
newNode := func(cmad bool, externalID string) *v1.Node {
node := &v1.Node{
ObjectMeta: metav1.ObjectMeta{},
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: testKubeletHostname,
kubeletapis.LabelOS: goruntime.GOOS,
kubeletapis.LabelArch: goruntime.GOARCH,
},
},
Spec: v1.NodeSpec{
ExternalID: externalID,
},
@@ -961,3 +975,164 @@ func TestUpdateNewNodeStatusTooLargeReservation(t *testing.T) {
assert.NoError(t, err)
assert.True(t, apiequality.Semantic.DeepEqual(expectedNode.Status.Allocatable, updatedNode.Status.Allocatable), "%s", diff.ObjectDiff(expectedNode.Status.Allocatable, updatedNode.Status.Allocatable))
}
func TestUpdateDefaultLabels(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
cases := []struct {
name string
initialNode *v1.Node
existingNode *v1.Node
needsUpdate bool
finalLabels map[string]string
}{
{
name: "make sure default labels exist",
initialNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
},
existingNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{},
},
},
needsUpdate: true,
finalLabels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
{
name: "make sure default labels are up to date",
initialNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
},
existingNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "old-hostname",
kubeletapis.LabelZoneFailureDomain: "old-zone-failure-domain",
kubeletapis.LabelZoneRegion: "old-zone-region",
kubeletapis.LabelInstanceType: "old-instance-type",
kubeletapis.LabelOS: "old-os",
kubeletapis.LabelArch: "old-arch",
},
},
},
needsUpdate: true,
finalLabels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
{
name: "make sure existing labels do not get deleted",
initialNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
},
existingNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
"please-persist": "foo",
},
},
},
needsUpdate: false,
finalLabels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
"please-persist": "foo",
},
},
{
name: "no update needed",
initialNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
},
existingNode: &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
},
needsUpdate: false,
finalLabels: map[string]string{
kubeletapis.LabelHostname: "new-hostname",
kubeletapis.LabelZoneFailureDomain: "new-zone-failure-domain",
kubeletapis.LabelZoneRegion: "new-zone-region",
kubeletapis.LabelInstanceType: "new-instance-type",
kubeletapis.LabelOS: "new-os",
kubeletapis.LabelArch: "new-arch",
},
},
}
for _, tc := range cases {
defer testKubelet.Cleanup()
kubelet := testKubelet.kubelet
needsUpdate := kubelet.updateDefaultLabels(tc.initialNode, tc.existingNode)
assert.Equal(t, tc.needsUpdate, needsUpdate, tc.name)
assert.Equal(t, tc.finalLabels, tc.existingNode.Labels, tc.name)
}
}