Merge pull request #105 from stefanprodan/svc

 Copy pod labels from canary to primary

Author: stefanprodan

artifacts/workloads/canary-deployment.yaml

@@ -23,7 +23,7 @@ spec:
     spec:
       containers:
       - name: podinfod
-        image: quay.io/stefanprodan/podinfo:1.2.0
+        image: quay.io/stefanprodan/podinfo:1.4.0
         imagePullPolicy: IfNotPresent
         ports:
         - containerPort: 9898
@@ -67,9 +67,3 @@ spec:
           requests:
             cpu: 100m
             memory: 16Mi
-        volumeMounts:
-        - mountPath: /data
-          name: data
-      volumes:
-      - emptyDir: {}
-        name: data

artifacts/workloads/canary-service.yaml

@@ -1,10 +1,8 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: podinfo
+  name: podinfo-canary
   namespace: test
-  labels:
-    app: podinfo
 spec:
   type: ClusterIP
   selector:

artifacts/workloads/primary-deployment.yaml

@@ -23,7 +23,7 @@ spec:
     spec:
       containers:
       - name: podinfod
-        image: quay.io/stefanprodan/podinfo:1.1.1
+        image: quay.io/stefanprodan/podinfo:1.4.1
         imagePullPolicy: IfNotPresent
         ports:
         - containerPort: 9898

artifacts/workloads/service.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: podinfo
+  namespace: test
+spec:
+  type: ClusterIP
+  selector:
+    app: podinfo-primary
+  ports:
+  - name: http
+    port: 9898
+    protocol: TCP
+    targetPort: http

pkg/controller/deployer.go

@@ -77,6 +77,8 @@ func (c *CanaryDeployer) Promote(cd *flaggerv1.Canary) error {
 	}
 	primaryCopy.Spec.Template.Annotations = annotations
 
+	primaryCopy.Spec.Template.Labels = makePrimaryLabels(canary.Spec.Template.Labels, primaryName)
+
 	_, err = c.kubeClient.AppsV1().Deployments(cd.Namespace).Update(primaryCopy)
 	if err != nil {
 		return fmt.Errorf("updating deployment %s.%s template spec failed: %v",
@@ -403,7 +405,7 @@ func (c *CanaryDeployer) createPrimaryDeployment(cd *flaggerv1.Canary) error {
 				},
 				Template: corev1.PodTemplateSpec{
 					ObjectMeta: metav1.ObjectMeta{
-						Labels:      map[string]string{"app": primaryName},
+						Labels:      makePrimaryLabels(canaryDep.Spec.Template.Labels, primaryName),
 						Annotations: annotations,
 					},
 					// update spec with the primary secrets and config maps
@@ -544,3 +546,16 @@ func (c *CanaryDeployer) makeAnnotations(annotations map[string]string) (map[str
 
 	return res, nil
 }
+
+func makePrimaryLabels(labels map[string]string, primaryName string) map[string]string {
+	idKey := "app"
+	res := make(map[string]string)
+	for k, v := range labels {
+		if k != idKey {
+			res[k] = v
+		}
+	}
+	res[idKey] = primaryName
+
+	return res
+}

pkg/router/kubernetes.go

@@ -20,7 +20,7 @@ type KubernetesRouter struct {
 	logger        *zap.SugaredLogger
 }
 
-// Sync creates to updates the primary and canary services
+// Sync creates or updates the primary and canary services
 func (c *KubernetesRouter) Sync(cd *flaggerv1.Canary) error {
 	targetName := cd.Spec.TargetRef.Name
 	primaryName := fmt.Sprintf("%s-primary", targetName)
@@ -40,7 +40,7 @@ func (c *KubernetesRouter) Sync(cd *flaggerv1.Canary) error {
 			},
 			Spec: corev1.ServiceSpec{
 				Type:     corev1.ServiceTypeClusterIP,
-				Selector: map[string]string{"app": targetName},
+				Selector: map[string]string{"app": primaryName},
 				Ports: []corev1.ServicePort{
 					{
 						Name:     "http",