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FieldRef feature for DownwardAPI (#534)

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* FieldRef feature for DownwardAPI

Signed-off-by: VineethReddy02 <vineethpothulapati@outlook.com>

* Unit tests for FieldRef

Signed-off-by: VineethReddy02 <vineethpothulapati@outlook.com>
This commit is contained in:
Vineeth Reddy
2019-03-09 00:45:08 +05:30
committed by Brian Goff
parent f8c51004d4
commit 5cea3e7ea8
18 changed files with 6871 additions and 2672 deletions
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168
vkubelet/env_internal_test.go
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@@ -18,8 +18,12 @@ const (
envVarName1 = "FOO"
// envVarValue1 is a string meant to be used as the value of the "envVarName1" environment value.
envVarValue1 = "foo_value"
// envVarName1 is a string that can be used as the name of an environment value.
// envVarName2 is a string that can be used as the name of an environment value.
envVarName2 = "BAR"
// envVarName3 is a string that can be used as the name of an environment value.
envVarName3 = "CHO"
// envVarName4 is a string that can be used as the name of an environment value.
envVarName4 = "CAR"
// invalidKey1 is a key that cannot be used as the name of an environment variable (since it starts with a digit).
invalidKey1 = "1INVALID"
// invalidKey2 is a key that cannot be used as the name of an environment variable (since it starts with a digit).
@@ -113,7 +117,7 @@ func TestPopulatePodWithInitContainersUsingEnv(t *testing.T) {
LocalObjectReference: corev1.LocalObjectReference{
Name: configMap1.Name,
},
Key: keyFoo,
Key: keyFoo,
// This scenario has been observed before https://github.com/virtual-kubelet/virtual-kubelet/issues/444#issuecomment-449611851.
Optional: nil,
},
@@ -156,7 +160,7 @@ func TestPopulatePodWithInitContainersUsingEnv(t *testing.T) {
LocalObjectReference: corev1.LocalObjectReference{
Name: configMap1.Name,
},
Key: keyFoo,
Key: keyFoo,
// This scenario has been observed before https://github.com/virtual-kubelet/virtual-kubelet/issues/444#issuecomment-449611851.
Optional: nil,
},
@@ -235,6 +239,164 @@ func TestPopulatePodWithInitContainersUsingEnv(t *testing.T) {
})
}
// TestPopulatePodWithInitContainersUsingEnv populates the environment of a pod with four containers (two init containers, two containers) using ".env".
// Then, it checks that the resulting environment for each container contains the expected environment variables.
func TestPopulatePodWithInitContainersUsingEnvWithFieldRef(t *testing.T) {
rm := testutil.FakeResourceManager(configMap1, configMap2, secret1, secret2)
er := testutil.FakeEventRecorder(defaultEventRecorderBufferSize)
// Create a pod object having two init containers and two containers.
// The containers' environment is to be populated both from directly-provided values and from keys in two configmaps and two secrets.
pod := &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: "pod-0",
Labels: map[string]string{
"zone": "us-est-coast",
"cluster": "test-cluster1",
"rack": "rack-22",
},
Annotations: map[string]string{
"build": "two",
"builder": "john-doe",
},
},
Spec: corev1.PodSpec{
NodeName: "namenode",
ServiceAccountName: "serviceaccount",
InitContainers: []corev1.Container{
{
Env: []corev1.EnvVar{
{
Name: envVarName1,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "spec.nodeName",
},
},
},
{
Name: envVarName2,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.labels",
},
},
},
{
Name: envVarName3,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.annotations",
},
},
},
{
Name: envVarName4,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "spec.serviceAccountName",
},
},
},
},
},
},
Containers: []corev1.Container{
{
Env: []corev1.EnvVar{
{
Name: envVarName1,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "spec.nodeName",
},
},
},
{
Name: envVarName2,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.labels",
},
},
},
{
Name: envVarName3,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.annotations",
},
},
},
{
Name: envVarName4,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "spec.serviceAccountName",
},
},
},
},
},
},
},
}
// Populate the pod's environment.
err := populateEnvironmentVariables(context.Background(), pod, rm, er)
assert.NoError(t, err)
// Make sure that all the containers' environments contain all the expected keys and values.
assert.ElementsMatch(t, pod.Spec.InitContainers[0].Env, []corev1.EnvVar{
{
Name: envVarName1,
Value: "namenode",
},
{
Name: envVarName2,
Value: "cluster=\"test-cluster1\"\nrack=\"rack-22\"\nzone=\"us-est-coast\"",
},
{
Name: envVarName3,
Value: "build=\"two\"\nbuilder=\"john-doe\"",
},
{
Name: envVarName4,
Value: "serviceaccount",
},
})
assert.ElementsMatch(t, pod.Spec.Containers[0].Env, []corev1.EnvVar{
{
Name: envVarName1,
Value: "namenode",
},
{
Name: envVarName2,
Value: "cluster=\"test-cluster1\"\nrack=\"rack-22\"\nzone=\"us-est-coast\"",
},
{
Name: envVarName3,
Value: "build=\"two\"\nbuilder=\"john-doe\"",
},
{
Name: envVarName4,
Value: "serviceaccount",
},
})
}
// TestPopulatePodWithInitContainersUsingEnvFrom populates the environment of a pod with four containers (two init containers, two containers) using ".envFrom".
// Then, it checks that the resulting environment for each container contains the expected environment variables.
func TestPopulatePodWithInitContainersUsingEnvFrom(t *testing.T) {