adding more examples
This commit is contained in:
Tihomir Surdilovic
parent
10c9d65945
commit
32a768ffb8
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@ -31,7 +31,9 @@ Serverless Workflow specification part.
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- [Scripts and Results](#Scripts-And-Results)
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- [Loops](#Loops)
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- [Conditionals](#Conditionals)
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- [Retrying Failed Steps](#Retrying-Failed-Steps)
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- [Recursion](#Recursion)
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- [Exit Handlers](#Exit-Handlers)
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### Hello World With Parameters
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@ -695,3 +697,340 @@ states:
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</td>
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</tr>
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</table>
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### Retrying Failed Steps
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[Argo Example](https://github.com/argoproj/argo/tree/master/examples#retrying-failed-or-errored-steps)
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<table>
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<tr>
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<th>Argo</th>
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<th>Serverless Workflow</th>
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</tr>
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<tr>
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<td valign="top">
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```yaml
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apiVersion: argoproj.io/v1alpha1
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kind: Workflow
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metadata:
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generateName: retry-backoff-
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spec:
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entrypoint: retry-backoff
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templates:
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- name: retry-backoff
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retryStrategy:
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limit: 10
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retryPolicy: "Always"
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backoff:
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duration: "1"
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factor: 2
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maxDuration: "1m"
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container:
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image: python:alpine3.6
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command: ["python", -c]
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# fail with a 66% probability
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args: ["import random; import sys; exit_code = random.choice([0, 1, 1]); sys.exit(exit_code)"]
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```
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</td>
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<td valign="top">
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```yaml
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id: retry-backoff-
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name: Retry Example
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version: '1.0'
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functions:
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- name: fail-function
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resource: python:alpine3.6
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type: container
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metadata:
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command: python
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states:
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- name: retry-backoff
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type: OPERATION
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start:
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kind: DEFAULT
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actions:
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- functionRef:
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refName: flip-coin-function
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parameters:
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args:
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- import random; import sys; exit_code = random.choice([0, 1, 1]); sys.exit(exit_code)
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retry:
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- expression:
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language: spel
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body: "$.exit_code == 1"
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maxAttempts: 10
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multiplier: PT2M
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interval: PT1M
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end:
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kind: DEFAULT
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```
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</td>
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</tr>
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</table>
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### Recursion
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[Argo Example](https://github.com/argoproj/argo/tree/master/examples#recursion)
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<table>
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<tr>
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<th>Argo</th>
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<th>Serverless Workflow</th>
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</tr>
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<tr>
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<td valign="top">
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```yaml
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apiVersion: argoproj.io/v1alpha1
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kind: Workflow
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metadata:
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generateName: coinflip-recursive-
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spec:
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entrypoint: coinflip
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templates:
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- name: coinflip
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steps:
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# flip a coin
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- - name: flip-coin
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template: flip-coin
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# evaluate the result in parallel
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- - name: heads
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template: heads # call heads template if "heads"
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when: "{{steps.flip-coin.outputs.result}} == heads"
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- name: tails # keep flipping coins if "tails"
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template: coinflip
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when: "{{steps.flip-coin.outputs.result}} == tails"
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- name: flip-coin
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script:
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image: python:alpine3.6
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command: [python]
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source: |
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import random
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result = "heads" if random.randint(0,1) == 0 else "tails"
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print(result)
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- name: heads
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container:
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image: alpine:3.6
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command: [sh, -c]
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args: ["echo \"it was heads\""]
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```
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</td>
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<td valign="top">
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```yaml
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id: coinflip-recursive-
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name: Recursion Example
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version: '1.0'
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functions:
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- name: heads-function
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resource: alpine:3.6
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type: container
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metadata:
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command: echo "it was heads"
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- name: flip-coin-function
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resource: python:alpine3.6
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type: script
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metadata:
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command: python
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source: import random result = "heads" if random.randint(0,1) == 0 else "tail" print(result)
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states:
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- name: flip-coin-state
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type: OPERATION
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start:
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kind: DEFAULT
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actions:
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- functionRef:
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refName: flip-coin-function
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actionDataFilter:
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dataResultsPath: "$.steps.flip-coin.outputs.result"
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transition:
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nextState: flip-coin-check
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- name: flip-coin-check
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type: SWITCH
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conditions:
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- path: "$.steps.flip-coin.outputs.result"
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value: tails
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operator: Equals
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transition:
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nextState: flip-coin-state
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- path: "$.steps.flip-coin.outputs.result"
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value: heads
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operator: Equals
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transition:
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nextState: heads-state
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- name: heads-state
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type: OPERATION
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actions:
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- functionRef:
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refName: heads-function
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parameters:
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args: echo "it was heads"
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end:
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kind: DEFAULT
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```
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</td>
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</tr>
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</table>
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### Exit Handlers
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[Argo Example](https://github.com/argoproj/argo/tree/master/examples#exit-handlers)
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*Note*: With Serverless Workflow specification we can handle Argos "onExit" functionality
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in couple of ways. One is the "onError" functionality to catch errors and transition to the
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"error" part of the workflow. Another is to send an event at the end of workflow execution
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which includes the workflow status. This event can then trigger execution other workflows
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that can handle each status. For this example we use the "onError" definition.
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<table>
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<tr>
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<th>Argo</th>
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<th>Serverless Workflow</th>
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</tr>
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<tr>
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<td valign="top">
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```yaml
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apiVersion: argoproj.io/v1alpha1
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kind: Workflow
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metadata:
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generateName: exit-handlers-
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spec:
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entrypoint: intentional-fail
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onExit: exit-handler
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templates:
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# primary workflow template
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- name: intentional-fail
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container:
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image: alpine:latest
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command: [sh, -c]
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args: ["echo intentional failure; exit 1"]
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# Exit handler templates
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# After the completion of the entrypoint template, the status of the
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# workflow is made available in the global variable {{workflow.status}}.
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# {{workflow.status}} will be one of: Succeeded, Failed, Error
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- name: exit-handler
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steps:
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- - name: notify
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template: send-email
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- name: celebrate
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template: celebrate
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when: "{{workflow.status}} == Succeeded"
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- name: cry
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template: cry
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when: "{{workflow.status}} != Succeeded"
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- name: send-email
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container:
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image: alpine:latest
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command: [sh, -c]
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args: ["echo send e-mail: {{workflow.name}} {{workflow.status}}"]
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- name: celebrate
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container:
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image: alpine:latest
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command: [sh, -c]
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args: ["echo hooray!"]
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- name: cry
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container:
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image: alpine:latest
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command: [sh, -c]
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args: ["echo boohoo!"]
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```
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</td>
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<td valign="top">
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```yaml
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id: exit-handlers-
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name: Exit/Error Handling Example
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version: '1.0'
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functions:
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- name: intentional-fail-function
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resource: alpine:latest
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type: container
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metadata:
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command: "[sh, -c]"
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- name: send-email-function
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resource: alpine:latest
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type: script
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metadata:
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command: "[sh, -c]"
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- name: celebrate-cry-function
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resource: alpine:latest
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type: script
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metadata:
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command: "[sh, -c]"
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states:
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- name: intentional-fail-state
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type: OPERATION
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start:
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kind: DEFAULT
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actions:
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- functionRef:
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refName: intentional-fail-function
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parameters:
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args: echo intentional failure; exit 1
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onError:
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- expression:
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language: spel
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body: "$.error != null"
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errorDataFilter:
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dataOutputPath: "$.exit-code"
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transition:
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nextState: send-email-state
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- name: send-email-state
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type: OPERATION
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actions:
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- functionRef:
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refName: send-email-function
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parameters:
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args: 'echo send e-mail: $.workflow.name $.exit-code'
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transition:
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nextState: emo-state
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- name: emo-state
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type: SWITCH
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conditions:
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- path: "$.exit-code"
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value: '1'
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operator: Equals
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transition:
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nextState: celebrate-state
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- path: "$.exit-code"
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value: '1'
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operator: NotEquals
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transition:
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nextState: cry-state
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- name: celebrate-state
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type: OPERATION
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actions:
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- functionRef:
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refName: celebrate-cry-function
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parameters:
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args: echo hooray!
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end:
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kind: DEFAULT
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- name: cry-state
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type: OPERATION
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actions:
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- functionRef:
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refName: celebrate-cry-function
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parameters:
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args: echo boohoo!
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end:
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kind: DEFAULT
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```
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</td>
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</tr>
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</table>
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