fix: updating to use include-label-prefix

fix: remove copy of labels

Signed-off-by: Hans Knecht <Hans.Knecht@missionlane.com>

pkg/router/gloo.go

@@ -38,10 +38,11 @@ import (
 
 // GlooRouter is managing Gloo route tables
 type GlooRouter struct {
-	kubeClient    kubernetes.Interface
-	glooClient    clientset.Interface
-	flaggerClient clientset.Interface
-	logger        *zap.SugaredLogger
+	kubeClient         kubernetes.Interface
+	glooClient         clientset.Interface
+	flaggerClient      clientset.Interface
+	logger             *zap.SugaredLogger
+	includeLabelPrefix []string
 }
 
 // Reconcile creates or updates the Gloo Edge route table
@@ -294,14 +295,7 @@ func (gr *GlooRouter) getGlooUpstreamKubeService(canary *flaggerv1.Canary, svc *
 		Selector:         svc.Spec.Selector,
 	}
 
-	upstreamLabels := make(map[string]string)
-	if upstreamSpec.Labels != nil {
-		for k, v := range upstreamSpec.Labels { // Order not specified
-			if _, ok := upstreamLabels[k]; !ok {
-				upstreamLabels[k] = v
-			}
-		}
-	}
+	upstreamLabels := includeLabelsByPrefix(upstreamSpec.Labels, gr.includeLabelPrefix)
 
 	return &gloov1.Upstream{
 		ObjectMeta: metav1.ObjectMeta{

pkg/router/util.go

@@ -0,0 +1,19 @@
+package router
+
+import (
+	"strings"
+)
+
+func includeLabelsByPrefix(labels map[string]string, includeLabelPrefixes []string) map[string]string {
+	filteredLabels := make(map[string]string)
+	for key, value := range labels {
+		for _, includeLabelPrefix := range includeLabelPrefixes {
+			if includeLabelPrefix == "*" || strings.HasPrefix(key, includeLabelPrefix) {
+				filteredLabels[key] = value
+				break
+			}
+		}
+	}
+
+	return filteredLabels
+}

pkg/router/util_test.go

@@ -0,0 +1,57 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package router
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIncludeLabelsByPrefix(t *testing.T) {
+	labels := map[string]string{
+		"foo":   "foo-value",
+		"bar":   "bar-value",
+		"lorem": "ipsum",
+	}
+	includeLabelPrefix := []string{"foo", "lor"}
+
+	filteredLabels := includeLabelsByPrefix(labels, includeLabelPrefix)
+
+	assert.Equal(t, filteredLabels, map[string]string{
+		"foo":   "foo-value",
+		"lorem": "ipsum",
+		// bar excluded
+	})
+}
+
+func TestIncludeLabelsByPrefixWithWildcard(t *testing.T) {
+	labels := map[string]string{
+		"foo":   "foo-value",
+		"bar":   "bar-value",
+		"lorem": "ipsum",
+	}
+	includeLabelPrefix := []string{"*"}
+
+	filteredLabels := includeLabelsByPrefix(labels, includeLabelPrefix)
+
+	assert.Equal(t, filteredLabels, map[string]string{
+		"foo":   "foo-value",
+		"bar":   "bar-value",
+		"lorem": "ipsum",
+	})
+}