add webservice template

examples/kubecondemo/README.md

@@ -59,9 +59,11 @@ Also the examples are based on Alibaba Cloud settings
 
 ### Import the database workload definition
 
+First, register the db workload definition:
 `kubectl apply -f script/def_db.yaml`
-
-
+The webservice workload is customized a little.
+`kubectl apply -f script/webservice.yaml`
+Don't forget to update vela:
 `vela system update`
 
 ### Apply the appfile

examples/kubecondemo/script/webservice.yaml

@@ -0,0 +1,51 @@
+apiVersion: core.oam.dev/v1alpha2
+kind: WorkloadDefinition
+metadata:
+  name: rds
+  annotations:
+    definition.oam.dev/apiVersion: "database.example.org/v1alpha1"
+    definition.oam.dev/kind: "PostgreSQLInstance"
+    definition.oam.dev/description: "rds on Alibaba Cloud"
+spec:
+  definitionRef:
+    name: rds.apps
+  extension:
+    template: |
+      output: {
+        apiVersion: "database.example.org/v1alpha1"
+        kind: "PostgreSQLInstance"
+        metadata:
+          name: context.name
+        spec: {         
+          selector: matchLabels: {
+            "app.oam.dev/component": context.name
+          }
+      
+          template: {
+            metadata: labels: {
+              "app.oam.dev/component": context.name
+            }
+                
+            spec: {
+              parameters:
+                storageGB: 20
+              compositionSelector: {
+                matchLabels:
+                  provider: parameter.provider
+              }
+              writeConnectionSecretToRef:
+                name: parameter.secretname
+            }
+          }
+      
+          selector: 
+            matchLabels:
+              "app.oam.dev/component": context.name
+        }
+      }
+      
+      parameter: {
+        secretname: *"db-conn" | string
+        provider: *"alibaba" | string
+      }
+