implement cluster-local-domain-tls in serving #14610

ReToCode · 2023-11-10T10:07:52Z

Context: https://github.com/orgs/knative/projects/63/views/1 and https://github.com/knative/serving/blob/main/docs/encryption/knative-encryption.md

Fixes #14217

Changes

Drops the existing self-built reconcilers for certificates
Drops the creation of a secret for Queue-Proxy
Introduces reconciliation of KnativeCertificates when cluster-local-domain-tls is enabled
Creates a KnativeCertificate for Activator and one in each namespace where Queue-Proxy is
Adds new certificate type labels to KnativeCertificates
Added new tests and e2e tests for the functionality
Extracted some testing stuff to make it work on all existing tests as well. Kourier with enabled cluster-local-domain-tls will also run all existing tests with TLS.
Cherry-pick [Automated] Update net-istio nightly #14706

Depends on these being merged first:

Release Note

Serving now supports the experimental feature `cluster-local-domain-tls` and creates the necessary `KnativeCertificates`

/hold

ReToCode

Added some inline comments to help with reviews.

ReToCode · 2023-11-30T10:22:43Z

pkg/reconciler/route/domains/domains.go

@@ -63,6 +65,28 @@ func GetAllDomainsAndTags(ctx context.Context, r *v1.Route, names []string, visi
 	return domainTagMap, nil
 }

+// GetDomainsForVisibility return all domains for the specified visibility.
+func GetDomainsForVisibility(ctx context.Context, targetName string, r *v1.Route, visibility netv1alpha1.IngressVisibility) (sets.String, error) {


this is moved and renamed from ingress.go

I also added some tests for this function.

ReToCode · 2023-11-30T10:22:47Z

pkg/reconciler/route/resources/certificate.go

+// We use https://golang.org/pkg/hash/adler32/#Checksum to compute the digest which returns a uint32.
+// We represent the digest in unsigned integer format with maximum value of 4,294,967,295 which are 10 digits.
+// The "-[tag digest]" is computed only if there's a tag
+func certNameFromRouteAndTag(route *v1.Route, tag string) string {


extracted from existing function

ReToCode · 2023-11-30T10:23:27Z

pkg/reconciler/route/resources/ingress.go

@@ -205,27 +203,6 @@ func makeIngressSpec(
 	}, nil
 }

-func routeDomain(ctx context.Context, targetName string, r *servingv1.Route, visibility netv1alpha1.IngressVisibility) (sets.String, error) {


moved to domains.go, see above.

ReToCode · 2023-11-30T10:24:27Z

pkg/reconciler/route/route.go

 		}
 	}

 	return unusedCerts, nil
 }

+func (c *Reconciler) deleteOrphanedCerts(ctx context.Context, orphanCerts []*netv1alpha1.Certificate) {


extracted to be reused from both callees.

ReToCode · 2023-11-30T10:24:49Z

pkg/testing/v1/route.go

-// WithRouteConditionsTLSNotEnabledForClusterLocalMessage calls
-// MarkTLSNotEnabled with TLSNotEnabledForClusterLocalMessage after initialized
-// the Service's conditions.
-func WithRouteConditionsTLSNotEnabledForClusterLocalMessage(rt *v1.Route) {


we don't longer need this, as we support it now.

ReToCode · 2023-11-30T10:27:17Z

test/e2e/service_to_service_test.go

 	"knative.dev/serving/pkg/apis/autoscaling"
 	"knative.dev/serving/pkg/apis/serving"
 	rtesting "knative.dev/serving/pkg/testing/v1"
 	"knative.dev/serving/test"
 	v1test "knative.dev/serving/test/v1"
 )

-const (


moved to separate file, see above.

ReToCode · 2023-11-30T10:28:12Z

test/e2e/service_to_service_test.go

@@ -229,6 +101,13 @@ func TestServiceToServiceCall(t *testing.T) {
 	}
 	t.Logf("helloworld internal domain is %s.", resources.Route.Status.URL.Host)

+	// if cluster-local-domain-tls is enabled, this will return the CA used to sign the certificates.
+	// TestProxyToHelloworld will use this CA to verify the https connection
+	secret, err := GetCASecret(clients)


All our tests that call cluster-local domains need to trust if we enable TLS, this helper gets the CA secret and the following TestProxyToHelloworld will add this CA to it's trust pool and thus validate the TLS connection.

ReToCode · 2023-11-30T10:29:05Z

test/test_images/httpproxy/httpproxy.go

@@ -103,27 +103,20 @@ func newTLSEnabledTransport() http.RoundTripper {
 		}
 		transport.TLSClientConfig = &tls.Config{
 			RootCAs: rootCAs,
-			// If SERVER_NAME is not set the empty value will make the


httpproxy no longer needs to trust a defined SERVER_NAME. The certificates will be valid for the actual service. Also we get the CA directly in the env variable.

third_party/cert-manager-latest/net-certmanager.yaml

third_party/kourier-latest/kourier.yaml

dprotaso · 2024-01-16T14:46:39Z

I disabled istio-tls testing - unsure if you want to re-enable it again as part of this PR

see github action here

https://github.com/knative/serving/pull/14706/files#diff-8d196c4ce9b53dec57fab83c31e0f2a460d671683b19c3ef3d662003e1305d1cR122

and test here

https://github.com/knative/serving/pull/14706/files#diff-1fd4217168a94dda8aedaef1eda6a4ea09553ed4fec17afcf9a67523cce45571R47

dprotaso · 2024-01-16T14:57:06Z

pkg/reconciler/revision/controller.go

@@ -131,6 +136,7 @@ func newControllerWithOptions(
 	}
 	deploymentInformer.Informer().AddEventHandler(handleMatchingControllers)
 	paInformer.Informer().AddEventHandler(handleMatchingControllers)
+	certificateInformer.Informer().AddEventHandler(handleMatchingControllers)


Since the namespace is the owner of the certificate - this won't work.

You could re-sync all the revisions when the cert changes by listing and enqueing (then filtering) - or you can use a tracker https://pkg.go.dev/knative.dev/pkg/tracker

Ah I see, makes sense. Updated it to using a tracker, I added it after the initial creation of a Certificate was successful. If that would fail (e.g. on the first Revision), we'd have an error on the Revision reconciliation anyway.

ReToCode · 2024-01-18T08:11:51Z

I disabled istio-tls testing - unsure if you want to re-enable it again as part of this PR

Let's keep that as a follow-up thing, as we also have flakiness with ambient that we'd need to look into.

ReToCode · 2024-01-18T09:35:51Z

/test unit-tests

pkg/reconciler/revision/controller.go

pkg/reconciler/revision/reconcile_resources.go

pkg/reconciler/revision/controller.go

dprotaso · 2024-01-18T15:17:11Z

pkg/reconciler/revision/reconcile_resources.go

+	// Tell our trackers to reconcile when the KnativeCertificate changes
+	gvk := rev.GetGroupVersionKind()
+	apiVersion, kind := gvk.ToAPIVersionAndKind()
+	if err := c.tracker.TrackReference(tracker.Reference{


this is backwards

you want to track the cert and reconcile the revision so the invocation is

TrackReference(certificate, rev)

Uh that API is quite confusing, but it makes sense that it has to be this way. Thanks for explaining and bearing with me on this.

ReToCode · 2024-01-24T06:25:26Z

/hold

We'll bring this in after the release cut

ReToCode · 2024-01-24T11:49:50Z

/unhold

dprotaso · 2024-01-25T20:28:39Z

/lgtm
/approve

knative-prow · 2024-01-25T20:28:46Z

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ReToCode changed the title ~~[TEST-ONLY] testing cluster-local-domain-tls in Serving~~ [WIP] implement cluster-local-domain-tls in serving Nov 30, 2023

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Update net-istio

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This was referenced Jan 18, 2024

Github actions e2e tests with istio-ambient are very flaky #14637

Open

[cluster-local-domain-tls] revisit reconciliation of Knative Certificates per namespace #14807

Open

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Use a revision tracker to reconcile on KCerts

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Route in unknown status in v1.14 #15232

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