EmailOperator for notifications in Apache Airflow - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the EmailOperator in Airflow?

The EmailOperator is used to send email notifications from Airflow workflows, such as alerts or status updates.

beginner

Which parameter specifies the recipient email address in EmailOperator?

The to parameter specifies the recipient email address or list of addresses.

beginner

How do you define the subject line of the email in EmailOperator?

Use the subject parameter to set the email's subject line.

intermediate

What must be configured in Airflow to enable EmailOperator to send emails?

You must configure the SMTP server settings in Airflow's airflow.cfg or environment variables to enable sending emails.

beginner

Show a simple example of EmailOperator usage in a DAG.

Example:<br>

email_task = EmailOperator(<br>    task_id='send_email',<br>    to='[e-mail]',<br>    subject='Airflow Notification',<br>    html_content='Your task completed successfully.',<br>    dag=dag<br>)

Which parameter in EmailOperator sets the email content?

A html_content

B to

C subject

D smtp_host

The html_content parameter defines the body of the email message.

What must be configured for EmailOperator to send emails successfully?

A SMTP server settings

B Database connection

C Kubernetes cluster

D Docker image

SMTP server settings allow Airflow to connect and send emails.

Can EmailOperator send emails to multiple recipients?

A No, only one email address is allowed

B Yes, by passing a list to the 'to' parameter

C Yes, but only one at a time manually

D No, it sends to the default admin only

You can pass a list of email addresses to the to parameter.

Which Airflow component runs the EmailOperator task?

A Scheduler

B Metadata Database

C Executor

D Webserver

The Executor runs tasks including EmailOperator.

What is the minimum required parameter to create an EmailOperator?

A to

B subject

C html_content

D task_id

Every operator requires a task_id to identify the task.

Explain how to set up and use EmailOperator in an Airflow DAG to send a notification email.

Think about the parameters needed and Airflow configuration.

What are the key configuration steps to enable Airflow to send emails using EmailOperator?

Focus on SMTP and Airflow settings.