added step to parse out deployment version

.github/workflows/github-action-deploy.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Build image
         uses: actions/docker/cli@master
         with:
-          args: "build --tag gcr.io/${{ secrets.GCP_PROJECT }}/greeter ./github-action-deploy"
+          args: "build --tag gcr.io/${{ secrets.GCP_PROJECT }}/greeter:${{ github.ref }} ./github-action-deploy"
 
       - name: Authenticate to GCP
         uses: actions/gcloud/auth@master
@@ -35,6 +35,9 @@ jobs:
           entrypoint: sh
           args: -c "docker push gcr.io/${{ secrets.GCP_PROJECT }}/greeter"
 
+      - name: Prepare service manifest
+        run: sed -e 's/PROJECT_ID/${{ secrets.GCP_PROJECT }}/g; s/APP_NAME/greeter/g; s/TAG_REF/${{ github.ref }}/g' github-action-deploy/template.yaml > github-action-deploy/service.yaml
+
       - name: Install kubectl and deploy service
         uses: actions/gcloud/cli@master
         with:

github-action-deploy/main.go

@@ -12,8 +12,9 @@ import (
 )
 
 const (
-	defaultPort      = "8080"
-	portVariableName = "PORT"
+	defaultPort         = "8080"
+	portVariableName    = "PORT"
+	releaseVariableName = "RELEASE"
 )
 
 var (
@@ -60,10 +61,16 @@ func statusHandler(c *gin.Context) {
 		return
 	}
 
+	releaseVersion := os.Getenv(releaseVariableName)
+	if releaseVersion == "" {
+		releaseVersion = "v0.0.0"
+	}
+
 	c.JSON(http.StatusOK, &Status{
 		ID:        id.String(),
 		Message:   c.Param("msg"),
 		RequestOn: time.Now(),
+		Release:   releaseVersion,
 	})
 }
 
@@ -72,4 +79,5 @@ type Status struct {
 	ID        string    `json:"id"`
 	Message   string    `json:"msg,omitempty"`
 	RequestOn time.Time `json:"on"`
+	Release   string    `json:"rel"`
 }

github-action-deploy/template.yaml

@@ -0,0 +1,12 @@
+apiVersion: serving.knative.dev/v1
+kind: Service
+metadata:
+  name: APP_NAME
+spec:
+  template:
+    spec:
+      containers:
+        - image: gcr.io/PROJECT_ID/APP_NAME:TAG_REF
+          env:
+            - name: RELEASE
+              value: "TAG_REF"