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Downward API support for status.hostIPs

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This commit is contained in:
Shiming Zhang 2023-05-28 00:38:25 +08:00
parent bf030fd68a
commit 335d905ce9
2 changed files with 73 additions and 0 deletions
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13
pkg/kubelet/kubelet_pods.go
View File

@ -830,6 +830,19 @@ func (kl *Kubelet) podFieldSelectorRuntimeValue(fs *v1.ObjectFieldSelector, pod
return "", err
}
return hostIPs[0].String(), nil
case "status.hostIPs":
if !utilfeature.DefaultFeatureGate.Enabled(features.PodHostIPs) {
return "", nil
}
hostIPs, err := kl.getHostIPsAnyWay()
if err != nil {
return "", err
}
ips := make([]string, 0, len(hostIPs))
for _, ip := range hostIPs {
ips = append(ips, ip.String())
}
return strings.Join(ips, ","), nil
case "status.podIP":
return podIP, nil
case "status.podIPs":

60
pkg/kubelet/kubelet_pods_test.go
View File

@ -408,6 +408,7 @@ func TestMakeEnvironmentVariables(t *testing.T) {
testCases := []struct {
name string // the name of the test case
ns string // the namespace to generate environment for
enablePodHostIPs bool // enable PodHostIPs feature gate
enableServiceLinks *bool // enabling service links
container *v1.Container // the container to use
nilLister bool // whether the lister should be nil
@ -642,6 +643,7 @@ func TestMakeEnvironmentVariables(t *testing.T) {
},
{
name: "downward api pod",
enablePodHostIPs: true,
ns: "downward-api",
enableServiceLinks: &falseValue,
container: &v1.Container{
@ -709,6 +711,15 @@ func TestMakeEnvironmentVariables(t *testing.T) {
},
},
},
{
Name: "HOST_IPS",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "status.hostIPs",
},
},
},
},
},
podIPs: []string{"1.2.3.4", "fd00::6"},
@ -721,10 +732,12 @@ func TestMakeEnvironmentVariables(t *testing.T) {
{Name: "POD_IP", Value: "1.2.3.4"},
{Name: "POD_IPS", Value: "1.2.3.4,fd00::6"},
{Name: "HOST_IP", Value: testKubeletHostIP},
{Name: "HOST_IPS", Value: testKubeletHostIP + "," + testKubeletHostIPv6},
},
},
{
name: "downward api pod ips reverse order",
enablePodHostIPs: true,
ns: "downward-api",
enableServiceLinks: &falseValue,
container: &v1.Container{
@ -756,6 +769,15 @@ func TestMakeEnvironmentVariables(t *testing.T) {
},
},
},
{
Name: "HOST_IPS",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "status.hostIPs",
},
},
},
},
},
podIPs: []string{"fd00::6", "1.2.3.4"},
@ -764,10 +786,12 @@ func TestMakeEnvironmentVariables(t *testing.T) {
{Name: "POD_IP", Value: "1.2.3.4"},
{Name: "POD_IPS", Value: "1.2.3.4,fd00::6"},
{Name: "HOST_IP", Value: testKubeletHostIP},
{Name: "HOST_IPS", Value: testKubeletHostIP + "," + testKubeletHostIPv6},
},
},
{
name: "downward api pod ips multiple ips",
enablePodHostIPs: true,
ns: "downward-api",
enableServiceLinks: &falseValue,
container: &v1.Container{
@ -799,6 +823,15 @@ func TestMakeEnvironmentVariables(t *testing.T) {
},
},
},
{
Name: "HOST_IPS",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "status.hostIPs",
},
},
},
},
},
podIPs: []string{"1.2.3.4", "192.168.1.1.", "fd00::6"},
@ -807,6 +840,7 @@ func TestMakeEnvironmentVariables(t *testing.T) {
{Name: "POD_IP", Value: "1.2.3.4"},
{Name: "POD_IPS", Value: "1.2.3.4,fd00::6"},
{Name: "HOST_IP", Value: testKubeletHostIP},
{Name: "HOST_IPS", Value: testKubeletHostIP + "," + testKubeletHostIPv6},
},
},
{
@ -1954,10 +1988,36 @@ func TestMakeEnvironmentVariables(t *testing.T) {
},
expectedError: true,
},
{
name: "downward api pod without host ips",
enablePodHostIPs: false,
ns: "downward-api",
enableServiceLinks: &falseValue,
container: &v1.Container{
Env: []v1.EnvVar{
{
Name: "HOST_IPS",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "status.hostIPs",
},
},
},
},
},
podIPs: []string{"1.2.3.4", "fd00::6"},
nilLister: true,
expectedEnvs: []kubecontainer.EnvVar{
{Name: "HOST_IPS", Value: ""},
},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PodHostIPs, tc.enablePodHostIPs)()
fakeRecorder := record.NewFakeRecorder(1)
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
testKubelet.kubelet.recorder = fakeRecorder