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cmd/k8s-operator: add more tests for "normal" paths.

Browse Source 
Tests cover configuring a proxy through an annotation rather than a
LoadBalancerClass, and converting between those two modes at runtime.

Updates #502.

Signed-off-by: David Anderson <danderson@tailscale.com>
pull/6722/head
David Anderson 2 years ago committed by Dave Anderson
parent c902190e67
commit 9c77205ba1
1 changed files with 388 additions and 17 deletions
Show Stats Download Patch File Download Diff File

383
cmd/k8s-operator/operator_test.go
Unescape Escape View File

@ -15,6 +15,7 @@ import (
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
v1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
@ -24,7 +25,7 @@ import (
"tailscale.com/types/ptr"
)
func TestController(t *testing.T) {
func TestLoadBalancerClass(t *testing.T) {
fc := fake.NewFakeClient()
ft := &fakeTSClient{}
sr := &ServiceReconciler{
@ -80,7 +81,6 @@ func TestController(t *testing.T) {
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
ResourceVersion: "4",
Finalizers: []string{"tailscale.com/finalizer"},
UID: types.UID("1234-UID"),
},
@ -100,6 +100,364 @@ func TestController(t *testing.T) {
},
}
expectEqual(t, fc, want)
// Turn the service back into a ClusterIP service, which should make the
// operator clean up.
mustUpdate(t, fc, "default", "test", func(s *corev1.Service) {
s.Spec.Type = corev1.ServiceTypeClusterIP
s.Spec.LoadBalancerClass = nil
// Fake client doesn't automatically delete the LoadBalancer status when
// changing away from the LoadBalancer type, we have to do
// controller-manager's work by hand.
s.Status = corev1.ServiceStatus{}
})
// synchronous StatefulSet deletion triggers a requeue. But, the StatefulSet
// didn't create any child resources since this is all faked, so the
// deletion goes through immediately.
expectRequeue(t, sr, "default", "test")
expectMissing[appsv1.StatefulSet](t, fc, "operator-ns", shortName)
// Second time around, the rest of cleanup happens.
expectReconciled(t, sr, "default", "test")
expectMissing[appsv1.StatefulSet](t, fc, "operator-ns", shortName)
expectMissing[corev1.Service](t, fc, "operator-ns", shortName)
expectMissing[corev1.Secret](t, fc, "operator-ns", fullName)
want = &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
UID: types.UID("1234-UID"),
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
}
expectEqual(t, fc, want)
}
func TestAnnotations(t *testing.T) {
fc := fake.NewFakeClient()
ft := &fakeTSClient{}
sr := &ServiceReconciler{
Client: fc,
tsClient: ft,
defaultTags: []string{"tag:k8s"},
operatorNamespace: "operator-ns",
proxyImage: "tailscale/tailscale",
}
// Create a service that we should manage, and check that the initial round
// of objects looks right.
mustCreate(t, fc, &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
// The apiserver is supposed to set the UID, but the fake client
// doesn't. So, set it explicitly because other code later depends
// on it being set.
UID: types.UID("1234-UID"),
Annotations: map[string]string{
"tailscale.com/expose": "true",
},
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
})
expectReconciled(t, sr, "default", "test")
fullName, shortName := findGenName(t, fc, "default", "test")
expectEqual(t, fc, expectedSecret(fullName))
expectEqual(t, fc, expectedHeadlessService(shortName))
expectEqual(t, fc, expectedSTS(shortName, fullName))
want := &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
Finalizers: []string{"tailscale.com/finalizer"},
UID: types.UID("1234-UID"),
Annotations: map[string]string{
"tailscale.com/expose": "true",
},
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
}
expectEqual(t, fc, want)
// Turn the service back into a ClusterIP service, which should make the
// operator clean up.
mustUpdate(t, fc, "default", "test", func(s *corev1.Service) {
delete(s.ObjectMeta.Annotations, "tailscale.com/expose")
})
// synchronous StatefulSet deletion triggers a requeue. But, the StatefulSet
// didn't create any child resources since this is all faked, so the
// deletion goes through immediately.
expectRequeue(t, sr, "default", "test")
expectMissing[appsv1.StatefulSet](t, fc, "operator-ns", shortName)
// Second time around, the rest of cleanup happens.
expectReconciled(t, sr, "default", "test")
expectMissing[appsv1.StatefulSet](t, fc, "operator-ns", shortName)
expectMissing[corev1.Service](t, fc, "operator-ns", shortName)
expectMissing[corev1.Secret](t, fc, "operator-ns", fullName)
want = &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
UID: types.UID("1234-UID"),
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
}
expectEqual(t, fc, want)
}
func TestAnnotationIntoLB(t *testing.T) {
fc := fake.NewFakeClient()
ft := &fakeTSClient{}
sr := &ServiceReconciler{
Client: fc,
tsClient: ft,
defaultTags: []string{"tag:k8s"},
operatorNamespace: "operator-ns",
proxyImage: "tailscale/tailscale",
}
// Create a service that we should manage, and check that the initial round
// of objects looks right.
mustCreate(t, fc, &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
// The apiserver is supposed to set the UID, but the fake client
// doesn't. So, set it explicitly because other code later depends
// on it being set.
UID: types.UID("1234-UID"),
Annotations: map[string]string{
"tailscale.com/expose": "true",
},
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
})
expectReconciled(t, sr, "default", "test")
fullName, shortName := findGenName(t, fc, "default", "test")
expectEqual(t, fc, expectedSecret(fullName))
expectEqual(t, fc, expectedHeadlessService(shortName))
expectEqual(t, fc, expectedSTS(shortName, fullName))
// Normally the Tailscale proxy pod would come up here and write its info
// into the secret. Simulate that, since it would have normally happened at
// this point and the LoadBalancer is going to expect this.
mustUpdate(t, fc, "operator-ns", fullName, func(s *corev1.Secret) {
if s.Data == nil {
s.Data = map[string][]byte{}
}
s.Data["device_id"] = []byte("ts-id-1234")
s.Data["device_fqdn"] = []byte("tailscale.device.name.")
})
expectReconciled(t, sr, "default", "test")
want := &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
Finalizers: []string{"tailscale.com/finalizer"},
UID: types.UID("1234-UID"),
Annotations: map[string]string{
"tailscale.com/expose": "true",
},
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
}
expectEqual(t, fc, want)
// Remove Tailscale's annotation, and at the same time convert the service
// into a tailscale LoadBalancer.
mustUpdate(t, fc, "default", "test", func(s *corev1.Service) {
delete(s.ObjectMeta.Annotations, "tailscale.com/expose")
s.Spec.Type = corev1.ServiceTypeLoadBalancer
s.Spec.LoadBalancerClass = ptr.To("tailscale")
})
expectReconciled(t, sr, "default", "test")
// None of the proxy machinery should have changed...
expectEqual(t, fc, expectedHeadlessService(shortName))
expectEqual(t, fc, expectedSTS(shortName, fullName))
// ... but the service should have a LoadBalancer status.
want = &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
Finalizers: []string{"tailscale.com/finalizer"},
UID: types.UID("1234-UID"),
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeLoadBalancer,
LoadBalancerClass: ptr.To("tailscale"),
},
Status: corev1.ServiceStatus{
LoadBalancer: corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{
Hostname: "tailscale.device.name",
},
},
},
},
}
expectEqual(t, fc, want)
}
func TestLBIntoAnnotation(t *testing.T) {
fc := fake.NewFakeClient()
ft := &fakeTSClient{}
sr := &ServiceReconciler{
Client: fc,
tsClient: ft,
defaultTags: []string{"tag:k8s"},
operatorNamespace: "operator-ns",
proxyImage: "tailscale/tailscale",
}
// Create a service that we should manage, and check that the initial round
// of objects looks right.
mustCreate(t, fc, &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
// The apiserver is supposed to set the UID, but the fake client
// doesn't. So, set it explicitly because other code later depends
// on it being set.
UID: types.UID("1234-UID"),
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeLoadBalancer,
LoadBalancerClass: ptr.To("tailscale"),
},
})
expectRequeue(t, sr, "default", "test")
fullName, shortName := findGenName(t, fc, "default", "test")
expectEqual(t, fc, expectedSecret(fullName))
expectEqual(t, fc, expectedHeadlessService(shortName))
expectEqual(t, fc, expectedSTS(shortName, fullName))
// Normally the Tailscale proxy pod would come up here and write its info
// into the secret. Simulate that, then verify reconcile again and verify
// that we get to the end.
mustUpdate(t, fc, "operator-ns", fullName, func(s *corev1.Secret) {
if s.Data == nil {
s.Data = map[string][]byte{}
}
s.Data["device_id"] = []byte("ts-id-1234")
s.Data["device_fqdn"] = []byte("tailscale.device.name.")
})
expectReconciled(t, sr, "default", "test")
want := &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
Finalizers: []string{"tailscale.com/finalizer"},
UID: types.UID("1234-UID"),
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeLoadBalancer,
LoadBalancerClass: ptr.To("tailscale"),
},
Status: corev1.ServiceStatus{
LoadBalancer: corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{
Hostname: "tailscale.device.name",
},
},
},
},
}
expectEqual(t, fc, want)
// Turn the service back into a ClusterIP service, but also add the
// tailscale annotation.
mustUpdate(t, fc, "default", "test", func(s *corev1.Service) {
s.ObjectMeta.Annotations = map[string]string{
"tailscale.com/expose": "true",
}
s.Spec.Type = corev1.ServiceTypeClusterIP
s.Spec.LoadBalancerClass = nil
// Fake client doesn't automatically delete the LoadBalancer status when
// changing away from the LoadBalancer type, we have to do
// controller-manager's work by hand.
s.Status = corev1.ServiceStatus{}
})
expectReconciled(t, sr, "default", "test")
expectEqual(t, fc, expectedHeadlessService(shortName))
expectEqual(t, fc, expectedSTS(shortName, fullName))
want = &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
Namespace: "default",
Finalizers: []string{"tailscale.com/finalizer"},
Annotations: map[string]string{
"tailscale.com/expose": "true",
},
UID: types.UID("1234-UID"),
},
Spec: corev1.ServiceSpec{
ClusterIP: "10.20.30.40",
Type: corev1.ServiceTypeClusterIP,
},
}
expectEqual(t, fc, want)
}
func expectedSecret(name string) *corev1.Secret {
@ -111,7 +469,6 @@ func expectedSecret(name string) *corev1.Secret {
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: "operator-ns",
ResourceVersion: "1",
Labels: map[string]string{
"tailscale.com/managed": "true",
"tailscale.com/parent-resource": "test",
@ -135,7 +492,6 @@ func expectedHeadlessService(name string) *corev1.Service {
Name: name,
GenerateName: "ts-test-",
Namespace: "operator-ns",
ResourceVersion: "1",
Labels: map[string]string{
"tailscale.com/managed": "true",
"tailscale.com/parent-resource": "test",
@ -161,7 +517,6 @@ func expectedSTS(stsName, secretName string) *appsv1.StatefulSet {
ObjectMeta: metav1.ObjectMeta{
Name: stsName,
Namespace: "operator-ns",
ResourceVersion: "1",
Labels: map[string]string{
"tailscale.com/managed": "true",
"tailscale.com/parent-resource": "test",
@ -263,11 +618,27 @@ func expectEqual[T any, O ptrObject[T]](t *testing.T, client client.Client, want
}, got); err != nil {
t.Fatalf("getting %q: %v", want.GetName(), err)
}
// The resource version changes eagerly whenever the operator does even a
// no-op update. Asserting a specific value leads to overly brittle tests,
// so just remove it from both got and want.
got.SetResourceVersion("")
want.SetResourceVersion("")
if diff := cmp.Diff(got, want); diff != "" {
t.Fatalf("unexpected object (-got +want):\n%s", diff)
}
}
func expectMissing[T any, O ptrObject[T]](t *testing.T, client client.Client, ns, name string) {
t.Helper()
obj := O(new(T))
if err := client.Get(context.Background(), types.NamespacedName{
Name: name,
Namespace: ns,
}, obj); !apierrors.IsNotFound(err) {
t.Fatalf("object %s/%s unexpectedly present, wanted missing", ns, name)
}
}
func expectReconciled(t *testing.T, sr *ServiceReconciler, ns, name string) {
t.Helper()
req := reconcile.Request{
@ -284,7 +655,7 @@ func expectReconciled(t *testing.T, sr *ServiceReconciler, ns, name string) {
t.Fatalf("unexpected immediate requeue")
}
if res.RequeueAfter != 0 {
t.Fatalf("unexpected timed requeue")
t.Fatalf("unexpected timed requeue (%v)", res.RequeueAfter)
}
}

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