chore: Added examples for exit handler for step and dag level

docs/fields.md

@@ -82,6 +82,10 @@ Workflow is the definition of a workflow resource
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -391,6 +395,10 @@ WorkflowSpec is the specification of a Workflow.
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -713,6 +721,10 @@ CronWorkflowSpec is the specification of a CronWorkflow
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -998,6 +1010,10 @@ WorkflowTemplateSpec is a spec of WorkflowTemplate.
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -1267,6 +1283,10 @@ Arguments to a template
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`global-outputs.yaml`](https://github.com/argoproj/argo/blob/master/examples/global-outputs.yaml)
 
 - [`global-parameters.yaml`](https://github.com/argoproj/argo/blob/master/examples/global-parameters.yaml)
@@ -1512,6 +1532,10 @@ Template is a reusable and composable unit of execution in a workflow
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -2009,6 +2033,10 @@ Parameter indicate a passed string parameter to a service template with an optio
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`global-outputs.yaml`](https://github.com/argoproj/argo/blob/master/examples/global-outputs.yaml)
 
 - [`global-parameters.yaml`](https://github.com/argoproj/argo/blob/master/examples/global-parameters.yaml)
@@ -2195,6 +2223,8 @@ DAGTemplate is a template subtype for directed acyclic graph templates
 
 - [`dag-targets.yaml`](https://github.com/argoproj/argo/blob/master/examples/dag-targets.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
 - [`loops-dag.yaml`](https://github.com/argoproj/argo/blob/master/examples/loops-dag.yaml)
 
 - [`parallelism-nested-dag.yaml`](https://github.com/argoproj/argo/blob/master/examples/parallelism-nested-dag.yaml)
@@ -2303,6 +2333,10 @@ Inputs are the mechanism for passing parameters, artifacts, volumes from one tem
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`global-outputs.yaml`](https://github.com/argoproj/argo/blob/master/examples/global-outputs.yaml)
 
 - [`handle-large-output-results.yaml`](https://github.com/argoproj/argo/blob/master/examples/handle-large-output-results.yaml)
@@ -2470,6 +2504,10 @@ Pod metdata
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -2837,6 +2875,8 @@ WorkflowStep is a reference to a template to execute in a series of step
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`fun-with-gifs.yaml`](https://github.com/argoproj/argo/blob/master/examples/fun-with-gifs.yaml)
@@ -3365,6 +3405,8 @@ DAGTask represents a node in the graph during DAG execution
 
 - [`dag-targets.yaml`](https://github.com/argoproj/argo/blob/master/examples/dag-targets.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
 - [`loops-dag.yaml`](https://github.com/argoproj/argo/blob/master/examples/loops-dag.yaml)
 
 - [`parallelism-nested-dag.yaml`](https://github.com/argoproj/argo/blob/master/examples/parallelism-nested-dag.yaml)
@@ -3636,6 +3678,10 @@ ObjectMeta is metadata that all persisted resources must have, which includes al
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -4119,6 +4165,10 @@ A single application container that you want to run within a pod.
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -4756,6 +4806,10 @@ PersistentVolumeClaimSpec describes the common attributes of storage devices and
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)
@@ -5736,6 +5790,10 @@ ListMeta describes metadata that synthetic resources must have, including lists
 
 - [`exit-code-output-variable.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-code-output-variable.yaml)
 
+- [`exit-handler-dag-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-dag-level.yaml)
+
+- [`exit-handler-step-level.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handler-step-level.yaml)
+
 - [`exit-handlers.yaml`](https://github.com/argoproj/argo/blob/master/examples/exit-handlers.yaml)
 
 - [`forever.yaml`](https://github.com/argoproj/argo/blob/master/examples/forever.yaml)

examples/exit-handler-dag-level.yaml

@@ -0,0 +1,50 @@
+# This example demonstrates a DAG level exit handler that executes at the end of the task
+## irrespective of the success, failure, or error of the task.
+apiVersion: argoproj.io/v1alpha1
+kind: Workflow
+metadata:
+  generateName: exit-hanlder-dag-level-
+spec:
+  entrypoint: main
+  templates:
+    - name: main
+      dag:
+        tasks:
+          - name: A
+            onExit: exit
+            template: echo
+            arguments:
+              parameters: [{name: message, value: A}]
+          - name: B
+            dependencies: [A]
+            onExit: exit
+            template: echo
+            arguments:
+              parameters: [{name: message, value: B}]
+          - name: C
+            dependencies: [A]
+            onExit: exit
+            template: echo
+            arguments:
+              parameters: [{name: message, value: C}]
+          - name: D
+            dependencies: [B, C]
+            onExit: exit
+            template: echo
+            arguments:
+              parameters: [{name: message, value: D}]
+
+    - name: echo
+      inputs:
+        parameters:
+          - name: message
+      container:
+        image: docker/whalesay
+        command: [cowsay]
+        args: ["{{inputs.parameters.message}}"]
+
+    - name: exit
+      container:
+        image: docker/whalesay
+        command: [cowsay]
+        args: ["task cleanup"]

examples/exit-handler-step-level.yaml

@@ -0,0 +1,41 @@
+# This example demonstrates a steps level exit handler that executes at the end of the step
+## irrespective of the success, failure, or error of the step.
+apiVersion: argoproj.io/v1alpha1
+kind: Workflow
+metadata:
+  generateName: exit-handler-step-level-
+spec:
+  entrypoint: main
+  templates:
+    - name: main
+      steps:
+        - - name: hello1
+            onExit: exit
+            template: whalesay
+            arguments:
+              parameters: [{name: message, value: "hello1"}]
+        - - name: hello2a
+            onExit: exit
+            template: whalesay
+            arguments:
+              parameters: [{name: message, value: "hello2a"}]
+          - name: hello2b
+            onExit: exit
+            template: whalesay
+            arguments:
+              parameters: [{name: message, value: "hello2b"}]
+
+    - name: exit
+      container:
+        image: docker/whalesay
+        command: [cowsay]
+        args: ["step cleanup"]
+
+    - name: whalesay
+      inputs:
+        parameters:
+          - name: message
+      container:
+        image: docker/whalesay
+        command: [cowsay]
+        args: ["{{inputs.parameters.message}}"]