From 041ca372c889737f848a8ac1ee868cd13f0c22f1 Mon Sep 17 00:00:00 2001
From: Megum1n <misaka@pantsu.moe>
Date: Tue, 14 Mar 2023 17:16:25 +0100
Subject: [PATCH] Gloo: Add support for listener.metadataStatic

---
 source/gloo_proxy.go      | 31 +++++++++++++++++++++++++++++--
 source/gloo_proxy_test.go | 22 ++++++++++++++++++++++
 2 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/source/gloo_proxy.go b/source/gloo_proxy.go
index 845ccdee05..09e96ead05 100644
--- a/source/gloo_proxy.go
+++ b/source/gloo_proxy.go
@@ -64,20 +64,35 @@ type proxySpecHTTPListener struct {
 }
 
 type proxyVirtualHost struct {
-	Domains  []string                 `json:"domains,omitempty"`
-	Metadata proxyVirtualHostMetadata `json:"metadata,omitempty"`
+	Domains        []string                       `json:"domains,omitempty"`
+	Metadata       proxyVirtualHostMetadata       `json:"metadata,omitempty"`
+	MetadataStatic proxyVirtualHostMetadataStatic `json:"metadataStatic,omitempty"`
 }
 
 type proxyVirtualHostMetadata struct {
 	Source []proxyVirtualHostMetadataSource `json:"sources,omitempty"`
 }
 
+type proxyVirtualHostMetadataStatic struct {
+	Source []proxyVirtualHostMetadataStaticSource `json:"sources,omitempty"`
+}
+
 type proxyVirtualHostMetadataSource struct {
 	Kind      string `json:"kind,omitempty"`
 	Name      string `json:"name,omitempty"`
 	Namespace string `json:"namespace,omitempty"`
 }
 
+type proxyVirtualHostMetadataStaticSource struct {
+	ResourceKind string                                    `json:"resourceKind,omitempty"`
+	ResourceRef  proxyVirtualHostMetadataSourceResourceRef `json:"resourceRef,omitempty"`
+}
+
+type proxyVirtualHostMetadataSourceResourceRef struct {
+	Name      string `json:"name,omitempty"`
+	Namespace string `json:"namespace,omitempty"`
+}
+
 type glooSource struct {
 	dynamicKubeClient dynamic.Interface
 	kubeClient        kubernetes.Interface
@@ -165,6 +180,18 @@ func (gs *glooSource) annotationsFromProxySource(ctx context.Context, virtualHos
 			}
 		}
 	}
+	for _, src := range virtualHost.MetadataStatic.Source {
+		kind := sourceKind(src.ResourceKind)
+		if kind != nil {
+			source, err := gs.dynamicKubeClient.Resource(*kind).Namespace(src.ResourceRef.Namespace).Get(ctx, src.ResourceRef.Name, metav1.GetOptions{})
+			if err != nil {
+				return nil, err
+			}
+			for key, value := range source.GetAnnotations() {
+				annotations[key] = value
+			}
+		}
+	}
 	return annotations, nil
 }
 
diff --git a/source/gloo_proxy_test.go b/source/gloo_proxy_test.go
index c1005fec2b..2df0246666 100644
--- a/source/gloo_proxy_test.go
+++ b/source/gloo_proxy_test.go
@@ -63,6 +63,17 @@ var internalProxy = proxy{
 									},
 								},
 							},
+							MetadataStatic: proxyVirtualHostMetadataStatic{
+								Source: []proxyVirtualHostMetadataStaticSource{
+									{
+										ResourceKind: "*v1.Unknown",
+										ResourceRef: proxyVirtualHostMetadataSourceResourceRef{
+											Name:      "my-unknown-svc",
+											Namespace: "unknown",
+										},
+									},
+								},
+							},
 						},
 						{
 							Domains: []string{"c.test"},
@@ -75,6 +86,17 @@ var internalProxy = proxy{
 									},
 								},
 							},
+							MetadataStatic: proxyVirtualHostMetadataStatic{
+								Source: []proxyVirtualHostMetadataStaticSource{
+									{
+										ResourceKind: "*v1.VirtualService",
+										ResourceRef: proxyVirtualHostMetadataSourceResourceRef{
+											Name:      "my-internal-svc",
+											Namespace: "internal",
+										},
+									},
+								},
+							},
 						},
 					},
 				},