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Merge pull request #27508 from aaronlevy/dapi-hostip

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Automatic merge from submit-queue

Kubelet can retrieve host IP even when apiserver has not been contacted

fixes https://github.com/kubernetes/kubernetes/issues/26590, fixes https://github.com/kubernetes/kubernetes/issues/6558

Right now the kubelet expects to get the hostIP from the kubelet's local nodeInfo cache. However, this will be empty if there is no api-server (or the apiServer has not yet been contacted).

In the case of static pods, this change means the downward api can now be used to populate hostIP.
This commit is contained in:
k8s-merge-robot 2016-06-25 23:29:05 -07:00 committed by GitHub
commit a43aa608a1
3 changed files with 26 additions and 1 deletions
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2
pkg/kubelet/kubelet.go
View File

@ -3568,7 +3568,7 @@ func (kl *Kubelet) generateAPIPodStatus(pod *api.Pod, podStatus *kubecontainer.P
})
if !kl.standaloneMode {
hostIP, err := kl.GetHostIP()
hostIP, err := kl.getHostIPAnyWay()
if err != nil {
glog.V(4).Infof("Cannot get host IP: %v", err)
} else {

9
pkg/kubelet/kubelet_getters.go
View File

@ -218,3 +218,12 @@ func (kl *Kubelet) GetHostIP() (net.IP, error) {
}
return nodeutil.GetNodeHostIP(node)
}
// getHostIPAnyway attempts to return the host IP from kubelet's nodeInfo, or the initialNodeStatus
func (kl *Kubelet) getHostIPAnyWay() (net.IP, error) {
node, err := kl.getNodeAnyWay()
if err != nil {
return nil, err
}
return nodeutil.GetNodeHostIP(node)
}

16
pkg/kubelet/kubelet_test.go
View File

@ -3724,6 +3724,10 @@ func TestPrivilegeContainerAllowed(t *testing.T) {
func TestPrivilegeContainerDisallowed(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("VersionInfo").Return(&cadvisorapi.VersionInfo{}, nil)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kubelet := testKubelet.kubelet
capabilities.SetForTests(capabilities.Capabilities{
@ -4321,6 +4325,10 @@ func TestGetPodsToSync(t *testing.T) {
func TestGenerateAPIPodStatusWithSortedContainers(t *testing.T) {
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("VersionInfo").Return(&cadvisorapi.VersionInfo{}, nil)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kubelet := testKubelet.kubelet
numContainers := 10
expectedOrder := []string{}
@ -4385,6 +4393,10 @@ func TestGenerateAPIPodStatusWithReasonCache(t *testing.T) {
testErrorReason := fmt.Errorf("test-error")
emptyContainerID := (&kubecontainer.ContainerID{}).String()
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("VersionInfo").Return(&cadvisorapi.VersionInfo{}, nil)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kubelet := testKubelet.kubelet
pod := podWithUidNameNs("12345678", "foo", "new")
pod.Spec = api.PodSpec{RestartPolicy: api.RestartPolicyOnFailure}
@ -4570,6 +4582,10 @@ func TestGenerateAPIPodStatusWithDifferentRestartPolicies(t *testing.T) {
testErrorReason := fmt.Errorf("test-error")
emptyContainerID := (&kubecontainer.ContainerID{}).String()
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.fakeCadvisor.On("VersionInfo").Return(&cadvisorapi.VersionInfo{}, nil)
testKubelet.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{}, nil)
testKubelet.fakeCadvisor.On("ImagesFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
testKubelet.fakeCadvisor.On("RootFsInfo").Return(cadvisorapiv2.FsInfo{}, nil)
kubelet := testKubelet.kubelet
pod := podWithUidNameNs("12345678", "foo", "new")
containers := []api.Container{{Name: "succeed"}, {Name: "failed"}}