Installing Airflow locally - Practice Exercises

Challenge - 5 Problems

💻 Command Output

intermediate

Airflow Initialization Command Output

What is the output of the command airflow db init when run for the first time after installing Airflow locally?

Apache Airflow

airflow db init

A Error: No Airflow home directory found

B Database already initialized

C Command not found: airflow

D

Creating tables
Done
Setting up the database
Done

💡 Hint

This command sets up the Airflow metadata database for the first time.

The airflow db init command creates the necessary tables in the metadata database and confirms completion with 'Done'.

🧠 Conceptual

intermediate

Airflow Home Directory Purpose

What is the main purpose of the AIRFLOW_HOME directory when installing Airflow locally?

A It contains the Airflow source code and binaries

B It stores Airflow configuration files, logs, and SQLite database by default

C It is used to store Docker images for Airflow

D It holds temporary files created by the operating system

💡 Hint

Think about where Airflow keeps its settings and logs on your local machine.

The AIRFLOW_HOME directory is where Airflow stores its configuration file (airflow.cfg), logs, and the default SQLite database.

🔀 Workflow

advanced

Correct Order to Install Airflow Locally

What is the correct order of commands to install and start Airflow locally using the default SQLite database?

A 3,1,2,4

B 2,1,3,4

C 1,2,3,4

D 1,3,2,4

💡 Hint

Think about installing first, then initializing, then creating user, then starting the webserver.

First, install Airflow with pip. Then initialize the database. Next, create an admin user. Finally, start the webserver to access the UI.

❓ Troubleshoot

advanced

Fixing Airflow Webserver Port Conflict

You try to start the Airflow webserver with airflow webserver --port 8080 but get an error that the port is already in use. Which command correctly starts the webserver on port 8090 instead?

A airflow webserver --port 8090

B airflow webserver -p 8090

C airflow webserver --port=8090

D airflow webserver --port:8090

💡 Hint

Use the correct long option syntax for port.

The correct syntax to specify the port is --port 8090. Short option -p is not supported and other syntaxes are invalid.

✅ Best Practice

expert

Recommended Executor for Local Airflow Installation

Which Airflow executor is recommended for a simple local installation for learning and development purposes?

A SequentialExecutor

B CeleryExecutor

C KubernetesExecutor

D LocalExecutor

💡 Hint

Consider the simplest executor that requires no extra setup.

The SequentialExecutor runs tasks one at a time and is the default for local installations. It requires no additional services.