In this chapter, you’ll gain a complete introduction to the components of Apache Airflow and learn how and why you should use them.

Introduction to Apache Airflow

Testing a task in Airflow

Examining Airflow commands

Airflow DAGs

Defining a simple DAG

Working with DAGs and the Airflow shell

Troubleshooting DAG creation

Airflow web interface

Starting the Airflow webserver

Navigating the Airflow UI

Examining DAGs with the Airflow UI

Intro to Airflow

What’s up DAG? Now it’s time to learn the basics of implementing Airflow DAGs. Through hands-on activities, you’ll learn how to set up and deploy operators, tasks, and scheduling.

Airflow operators

Defining a BashOperator task

Multiple BashOperators

Airflow tasks

Define order of BashOperators

Determining the order of tasks

Troubleshooting DAG dependencies

Additional operators

Using the PythonOperator

More PythonOperators

EmailOperator and dependencies

Airflow scheduling

Schedule a DAG via Python

Deciphering Airflow schedules

Troubleshooting DAG runs

Implementing Airflow DAGs

In this chapter, you’ll learn how to save yourself time using Airflow components such as sensors and executors while monitoring and troubleshooting Airflow workflows.

Airflow-Sensoren

Options

Sensors

Both

Operators

Sensoren vs. Operatoren

Sensorentzug

Airflow-Executors

Den Executor bestimmen

from airflow import DAG
from airflow.operators.bash import BashOperator
from airflow.sensors.filesystem import FileSensor
from datetime import datetime

report_dag = DAG(
    dag_id = 'execute_report',
    schedule_interval = "0 0 * * *"
)

precheck = FileSensor(
    task_id='check_for_datafile',
    filepath='salesdata_ready.csv',
    start_date=datetime(2024,1,20),
    mode='poke',
    dag=report_dag
)

generate_report_task = BashOperator(
    task_id='generate_report',
    bash_command='generate_report.sh',
    start_date=datetime(2024,1,20),
    dag=report_dag
)

precheck >> generate_report_task


from airflow import DAG
from airflow.operators.bash import BashOperator
from airflow.sensors.filesystem import FileSensor
from datetime import datetime

report_dag = DAG(
    dag_id = 'execute_report',
    schedule_interval = "0 0 * * *"
)

precheck = FileSensor(
    task_id='check_for_datafile',
    filepath='salesdata_ready.csv',
    start_date=datetime(2024,1,20),
    mode='reschedule',
    dag=report_dag
)

generate_report_task = BashOperator(
    task_id='generate_report',
    bash_command='generate_report.sh',
    start_date=datetime(2024,1,20),
    dag=report_dag
)

precheck >> generate_report_task


Auswirkungen des Executors

Debugging und Fehlerbehebung in Airflow

DAGs im Sack

from airflow import DAG
#from airflow.operators.bash import BashOperator
from airflow.sensors.filesystem import FileSensor
from datetime import datetime

report_dag = DAG(
    dag_id = 'execute_report',
    schedule_interval = "0 0 * * *"
)

precheck = FileSensor(
    task_id='check_for_datafile',
    filepath='salesdata_ready.csv',
    start_date=datetime(2023,2,20),
    mode='poke',
    dag=report_dag)

generate_report_task = BashOperator(
    task_id='generate_report',
    bash_command='generate_report.sh',
    start_date=datetime(2023,2,20),
    dag=report_dag
)

precheck >> generate_report_task


from airflow import DAG
from airflow.operators.bash import BashOperator
from datetime import datetime

sample_dag = DAG(
    dag_id = 'sample_dag',
    schedule_interval = "0 0 * * *"
)

sample_task = BashOperator(
    task_id='sample',
    bash_command='generate_sample.sh',
    start_date=datetime(2023,2,20),
    dag=sample_dag
)


from airflow import DAG
from airflow.operators.bash import BashOperator
from airflow.sensors.filesystem import FileSensor
from datetime import datetime

report_dag = DAG(
    dag_id = 'execute_report',
    schedule_interval = "0 0 * * *"
)

precheck = FileSensor(
    task_id='check_for_datafile',
    filepath='salesdata_ready.csv',
    start_date=datetime(2023,2,20),
    mode='reschedule',
    dag=report_dag)

generate_report_task = BashOperator(
    task_id='generate_report',
    bash_command='generate_report.sh',
    start_date=datetime(2023,2,20),
    dag=report_dag
)

precheck >> generate_report_task


Fehlender DAG

SLAs und Reporting in Airflow

Eine SLA definieren

Eine Task-SLA definieren

Einen Bericht erstellen und per E-Mail versenden

from airflow import DAG
from airflow.operators.bash import BashOperator
from airflow.sensors.filesystem import FileSensor
from datetime import datetime

default_args={
    '____': [____],
    '____': True,
    'email_on_success': ____
}

report_dag = DAG(
    dag_id = 'execute_report',
    schedule_interval = "0 0 * * *",
    default_args=default_args
)

precheck = FileSensor(
    task_id='check_for_datafile',
    filepath='salesdata_ready.csv',
    start_date=datetime(2023,2,20),
    mode='reschedule',
    dag=report_dag)

generate_report_task = BashOperator(
    task_id='generate_report',
    bash_command='generate_report.sh',
    start_date=datetime(2023,2,20),
    dag=report_dag
)

precheck >> generate_report_task


from airflow import DAG
from airflow.operators.bash import BashOperator
from airflow.sensors.filesystem import FileSensor
from datetime import datetime

default_args={
    'email': ['airflowalerts@datacamp.com', 'airflowadmin@datacamp.com'],
    'email_on_failure': True,
    'email_on_success': True
}

report_dag = DAG(
    dag_id = 'execute_report',
    schedule_interval = "0 0 * * *",
    default_args=default_args
)

precheck = FileSensor(
    task_id='check_for_datafile',
    filepath='salesdata_ready.csv',
    start_date=datetime(2023,2,20),
    mode='reschedule',
    dag=report_dag)

generate_report_task = BashOperator(
    task_id='generate_report',
    bash_command='generate_report.sh',
    start_date=datetime(2023,2,20),
    dag=report_dag
)

precheck >> generate_report_task


Status-E-Mails hinzufügen

Maintaining and monitoring Airflow workflows

Put it all together. In this final chapter, you’ll apply everything you've learned to build a production-quality workflow in Airflow.

Working with templates

Creating a templated BashOperator

Templates with multiple arguments

More templates

Using lists with templates

Understanding parameter options

Sending templated emails

Branching

Define a BranchPythonOperator

Branch troubleshooting

Creating a production pipeline

Creating a production pipeline #1

Creating a production pipeline #2

Adding the final changes to your pipeline

Congratulations!

Building production pipelines in Airflow

Jetzt aktualisiert auf Apache Airflow 2.7 – Daten nach Zeitplan bereitzustellen, kann ein manueller Prozess sein. Du schreibst Skripte, pflegst komplexe Cron-Jobs und probierst verschiedene Wege aus, um ständig wechselnde Anforderungen zu erfüllen – und im Team wird die Verwaltung noch kniffliger. Apache Airflow nimmt dir diese Kopfschmerzen, indem es deinen Workflows Planung, Fehlerbehandlung und Reporting hinzufügt. In diesem Kurs lernst du die Grundlagen von Apache Airflow und wie du komplexe Data-Engineering-Pipelines produktiv umsetzt. Außerdem lernst du, wie du Directed Acyclic Graphs (DAGs) nutzt, Data-Engineering-Workflows automatisierst und Aufgaben im Data Engineering einfach und wiederholbar implementierst – damit du einen kühlen Kopf bewahrst.

Intermediate Python

Introduction to Shell

Lerne, Daten-Workflows mit Airflow und Python zu planen, Fehler zu behandeln und Berichte zu erstellen.

Einführung in Apache Airflow mit Python

Dieser Kurs zeigt dir, wie du Data-Engineering-Workflows implementierst und planst.

Dateningenieur in Python

Fehlender DAG

Einführung in Apache Airflow mit Python

Interaktive Übung