Add information about which services are proxied to ui services… (#7417)

agent/ui_endpoint.go

@@ -22,6 +22,8 @@ type ServiceSummary struct {
 	Tags              []string
 	Nodes             []string
 	InstanceCount     int
+	ProxyFor          []string            `json:",omitempty"`
+	proxyForSet       map[string]struct{} // internal to track uniqueness
 	ChecksPassing     int
 	ChecksWarning     int
 	ChecksCritical    int
@@ -184,6 +186,15 @@ func summarizeServices(dump structs.CheckServiceNodes) []*ServiceSummary {
 		sum.Nodes = append(sum.Nodes, csn.Node.Node)
 		sum.Kind = svc.Kind
 		sum.InstanceCount += 1
+		if svc.Kind == structs.ServiceKindConnectProxy {
+			if _, ok := sum.proxyForSet[svc.Proxy.DestinationServiceName]; !ok {
+				if sum.proxyForSet == nil {
+					sum.proxyForSet = make(map[string]struct{})
+				}
+				sum.proxyForSet[svc.Proxy.DestinationServiceName] = struct{}{}
+				sum.ProxyFor = append(sum.ProxyFor, svc.Proxy.DestinationServiceName)
+			}
+		}
 		for _, tag := range svc.Tags {
 			found := false
 			for _, existing := range sum.Tags {

agent/ui_endpoint_test.go

@@ -314,6 +314,7 @@ func TestUiServices(t *testing.T) {
 		// internal accounting that users don't see can be blown away
 		for _, sum := range summary {
 			sum.externalSourceSet = nil
+			sum.proxyForSet = nil
 		}
 
 		expected := []*ServiceSummary{
@@ -345,6 +346,7 @@ func TestUiServices(t *testing.T) {
 				Tags:            nil,
 				Nodes:           []string{"bar", "foo"},
 				InstanceCount:   2,
+				ProxyFor:        []string{"api"},
 				ChecksPassing:   2,
 				ChecksWarning:   1,
 				ChecksCritical:  1,
@@ -381,6 +383,7 @@ func TestUiServices(t *testing.T) {
 		// internal accounting that users don't see can be blown away
 		for _, sum := range summary {
 			sum.externalSourceSet = nil
+			sum.proxyForSet = nil
 		}
 
 		expected := []*ServiceSummary{
@@ -401,6 +404,7 @@ func TestUiServices(t *testing.T) {
 				Tags:            nil,
 				Nodes:           []string{"bar", "foo"},
 				InstanceCount:   2,
+				ProxyFor:        []string{"api"},
 				ChecksPassing:   2,
 				ChecksWarning:   1,
 				ChecksCritical:  1,