Source code for airflow.example_dags.example_setup_teardown
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"""Example DAG demonstrating the usage of setup and teardown tasks."""
from __future__ import annotations
import pendulum
from airflow.models.dag import DAG
from airflow.providers.standard.operators.bash import BashOperator
from airflow.utils.task_group import TaskGroup
with DAG(
dag_id="example_setup_teardown",
schedule=None,
start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
catchup=False,
tags=["example"],
) as dag:
[docs] root_setup = BashOperator(task_id="root_setup", bash_command="echo 'Hello from root_setup'").as_setup()
root_normal = BashOperator(task_id="normal", bash_command="echo 'I am just a normal task'")
root_teardown = BashOperator(
task_id="root_teardown", bash_command="echo 'Goodbye from root_teardown'"
).as_teardown(setups=root_setup)
root_setup >> root_normal >> root_teardown
with TaskGroup("section_1") as section_1:
inner_setup = BashOperator(
task_id="taskgroup_setup", bash_command="echo 'Hello from taskgroup_setup'"
).as_setup()
inner_normal = BashOperator(task_id="normal", bash_command="echo 'I am just a normal task'")
inner_teardown = BashOperator(
task_id="taskgroup_teardown", bash_command="echo 'Hello from taskgroup_teardown'"
).as_teardown(setups=inner_setup)
inner_setup >> inner_normal >> inner_teardown
root_normal >> section_1