Introduction

<< Explain what DAG is>>

<< Explain what Task is>>

DAG Management

Starting DAG

1. Log in to Airflow web page
   1. DEV - https://plt-nosql01.dhe.duke.edu:8083/admin/
   2. PRD - https://plp-nosql01.dhe.duke.edu:8083/admin/
2. Find line of DAG that you want to start
3. On right side of line are several buttons. Click the Play button.
4. Click OK on the Confirmation Popup window.

Stopping DAG

1. Click on the DAG name you want to stop. The DAG Detail page will appear in Tree View.
2. Click the circle of the DAG instance you want to stop. Most likely, the circle will be bright green.
3. On the popup window, click Mark Failed then click Close.
4. It may take up to 1 minute for the DAG to completely stop.
5. Once stopped, the circle should become red instead of bright green in the DAG Detail Tree View

Restarting DAG

1. Click on the DAG name you want to stop. The DAG Detail page will appear in Tree View.
2. Click the circle of the DAG instance you want to stop. Most likely, the circle will be bright green. 
3. On the popup window, click Clear then click Close.
4. In about 1 minute, Airflow will restart the DAG from the very beginning.

Task Management

Starting Task

Starting a task will be done automatically within the DAG using the specified execution order within the DAG.

Stopping Task

1. Click on the DAG name you want to stop. The DAG Detail page will appear in Tree View.
2. Click the square for the task and specific instance you want to stop. Most likely, the square will be bright green.
3. On the popup window, click either Mark Failed or Mark Success then click Close.
   1. If selecting Mark Failed, click OK on the verification of downstream tasks to not run then click Close.

Restarting Task

1. Click on the DAG name you want to stop. The DAG Detail page will appear in Tree View.
2. Click the square for the task and specific instance you want to stop. Most likely, the square will be bright green.
3. On the popup window, click Clear then click Close.
   1. Click OK on the verification of downstream tasks to clear then click Close.