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k8s_metadata_test.go
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k8s_metadata_test.go
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package cloud
import (
"errors"
"fmt"
"testing"
v1 "k8s.io/api/core/v1"
k8sErrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/fake"
)
var (
csiNodeNameKey = "CSI_NODE_NAME"
nodeName = "foo"
instanceId = "i-1234567890abcdef0"
nodeRegion = "us-east-2"
nodeZone = "us-east-2a"
)
func TestErrorProducedIfCSI_NODE_NAMENotSet(t *testing.T) {
clientSet := setupKubernetesClient(t, "", nil)
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
_, err := k8sMp.getMetadata()
if err == nil {
t.Fatalf("Expected error to be thrown but instead got success")
}
}
func TestErrorProducedIfNodeIsNotFound(t *testing.T) {
clientSet := setupKubernetesClient(t, nodeName, nil)
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
_, err := k8sMp.getMetadata()
if k8sErrors.IsNotFound(errors.Unwrap(err)) {
t.Fatalf("Expected k8s API to throw 404 but did not")
}
}
func TestErrorProducedIfProviderIDIsEmpty(t *testing.T) {
clientSet := setupKubernetesClient(t, nodeName, createNode(nodeName, nodeRegion, nodeZone, ""))
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
_, err := k8sMp.getMetadata()
if err == nil {
t.Fatalf("Expected error to be thrown but instead got success")
}
}
func TestErrorProducedIfProviderIDDoesNotMatchRegex(t *testing.T) {
clientSet := setupKubernetesClient(t, nodeName, createNode(nodeName, nodeRegion, nodeZone, "bar-bar-bar"))
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
_, err := k8sMp.getMetadata()
if err == nil {
t.Fatalf("Expected error to be thrown but instead got success")
}
}
func TestInstanceIdParsedFromProviderIdCorrectly(t *testing.T) {
clientSet := setupKubernetesClient(t, nodeName, createDefaultNode())
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
metadata, err := k8sMp.getMetadata()
if err != nil {
t.Fatalf("Error occurred when parsing instance ID, %v", err)
}
if metadata.GetInstanceID() != instanceId {
t.Fatalf("Instance ID not extracted correctly, expected %s, got %s", instanceId, metadata.GetInstanceID())
}
}
func TestTaskIdParsedFromProviderIdCorrectly(t *testing.T) {
clientSet := setupKubernetesClient(t, nodeName, createFargateNode())
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
metadata, err := k8sMp.getMetadata()
if err != nil {
t.Fatalf("Error occurred when parsing instance ID, %v", err)
}
if metadata.GetInstanceID() != taskId {
t.Fatalf("Instance ID not extracted correctly, expected %s, got %s", taskId, metadata.GetInstanceID())
}
}
func TestRegionAndZoneExtractedCorrectlyFromLabels(t *testing.T) {
clientSet := setupKubernetesClient(t, nodeName, createDefaultNode())
k8sMp := kubernetesApiMetadataProvider{api: clientSet}
metadata, err := k8sMp.getMetadata()
if err != nil {
t.Fatalf("Error occurred when parsing instance ID %v", err)
}
if metadata.GetInstanceID() != instanceId {
t.Fatalf("Instance ID not extracted correctly, expected %s, got %s", instanceId, metadata.GetInstanceID())
}
}
func setupKubernetesClient(t *testing.T, csiNodeName string, node *v1.Node) kubernetes.Interface {
t.Setenv(csiNodeNameKey, csiNodeName)
if node == nil {
return fake.NewSimpleClientset()
}
return fake.NewSimpleClientset(node)
}
func createNode(nodeName string, nodeRegion string, nodeZone string, providerId string) *v1.Node {
return &v1.Node{
TypeMeta: metav1.TypeMeta{
Kind: "Node",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: nodeName,
Labels: map[string]string{
"topology.kubernetes.io/region": nodeRegion,
"topology.kubernetes.io/zone": nodeZone,
},
},
Spec: v1.NodeSpec{
ProviderID: providerId,
},
Status: v1.NodeStatus{},
}
}
func createDefaultNode() *v1.Node {
return createNode(nodeName, nodeRegion, nodeZone, fmt.Sprintf("aws:///%s/%s", nodeZone, instanceId))
}
func createFargateNode() *v1.Node {
return createNode(nodeName, nodeRegion, nodeZone, fmt.Sprintf("aws:///%s/1234567890-%s/%s", nodeZone, taskId, nodeName))
}