dolphinscheduler/docs/docs/en/guide/task/sub-process.md

SubProcess Node

Overview

The sub-process node is to execute an external workflow definition as a task node.

Create Task

• Click Project Management -> Project Name -> Workflow Definition, and click the Create Workflow button to enter the DAG editing page.
• Drag from the toolbar task node to canvas to create a new SubProcess task.

Task Parameter

• Please refer to DolphinScheduler Task Parameters Appendix Default Task Parameters section for default parameters.

Parameter	Description
Child node	It is the workflow definition of the selected sub-process. Enter the child node in the upper right corner to jump to the workflow definition of the selected sub-process.

Task Example

This example simulates a common task type, here we use a child node task to recall the Shell to print out "hello". This means executing a shell task as a child node.

Create a Shell task

Create a shell task to print "hello" and define the workflow as test_dag01.

Create the Sub_process task

To use the sub_process, you need to create the sub-node task, which is the shell task we created in the first step. After that, as shown in the diagram below, select the corresponding sub-node in position ⑤.

After creating the sub_process, create a corresponding shell task for printing "world" and link both together. Save the current workflow and run it to get the expected result.

Note

When using sub_process to recall a sub-node task, you need to ensure that the defined sub-node is online status, otherwise, the sub_process workflow will not work properly.