Add example for generatorOptions

Author: Liujingfang1

docs/kustomization.yaml

@@ -102,6 +102,24 @@ secretGenerator:
   envCommand: printf \"DB_USERNAME=admin\nDB_PASSWORD=somepw\"
   type: Opaque
 
+# generatorOptions modify behavior of all ConfigMap and Secret generators
+generatorOptions:
+  # labels to add to all generated resources
+  labels:
+    kustomize.generated.resources: somevalue
+  # annotations to add to all generated resources
+  annotations:
+    kustomize.generated.resource: somevalue
+  # timeoutSeconds specifies the timeout for commands
+  timeoutSeconds: 30
+  # shell and arguments to use as a context for commands used in resource
+  # generation. Default at time of writing: ["sh", "-c"]
+  shell: ["sh", "-c"]
+  # disableNameSuffixHash is true disables the default behavior of adding a
+  # suffix to the names of generated resources that is a hash of
+  # the resource contents.
+  disableNameSuffixHash: true
+
 # Each entry in this list should resolve to a directory
 # containing a kustomization file, else the
 # customization fails.

examples/README.md

@@ -29,6 +29,8 @@ go get sigs.k8s.io/kustomize
 
  * [configGenerations](configGeneration.md) -
    Rolling update when ConfigMapGenerator changes
+ 
+ * [generatorOptions](generatorOptions.md) - Modifying behavior of all ConfigMap and Secret generators.  
 
  * [breakfast](breakfast.md) - Customize breakfast for
    Alice and Bob.

examples/generatorOptions.md

@@ -0,0 +1,62 @@
+# Generator Options
+
+Kustomize provides options to modify the behavior of ConfigMap and Secret generators. These options include
+ 
+ - disable appending a content has suffix to the names of generated resources
+ - adding labels to generated resources
+ - adding annotations to generated resources
+ - changing shell and arguments for getting data from commands
+ - changing timeout for executing commands
+ 
+This demo shows how to use these options. First create a workspace.
+```
+DEMO_HOME=$(mkdir -d)
+```
+
+Create a kustomization and add a ConfigMap generator to it.
+
+<!-- @createCMGenerator @test -->
+```
+cat > $DEMO_HOME/kustomization.yaml << EOF
+configMapGenerator:
+- name: my-configmap
+  literals:	
+  - foo=bar
+  - baz=qux
+EOF
+```
+
+Add following generatorOptions
+<!-- @addGeneratorOptions @test -->
+```
+cat >> $DEMO_HOME/kustomization.yaml << EOF
+generatorOptions:
+ disableNameSuffixHash: true
+ labels:
+   kustomize.generated.resource: somevalue
+ annotations:
+   annotations.only.for.generated: othervalue
+EOF
+```
+Run `kustomize build` and make sure that the generated ConfigMap
+ 
+ - doesn't have name suffix
+    <!-- @verify @test -->
+    ```
+    test 1 == \
+    $(kustomize build $DEMO_HOME | grep "name: my-configmap$" | wc -l); \
+    echo $?
+    ```
+ - has label `kustomize.generated.resource: somevalue`
+     ```
+     test 1 == \
+     $(kustomize build $DEMO_HOME | grep -A 1 "labels" | grep "kustomize.generated.resource" | wc -l); \
+     echo $?
+     ```
+ - has annotation `annotations.only.for.generated: othervalue`
+      ```
+      test 1 == \
+      $(kustomize build $DEMO_HOME | grep -A 1 "annotations" | grep "annotations.only.for.generated" | wc -l); \
+      echo $?
+      ```
+