Audit logging in Apache Airflow - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is audit logging in Airflow?

Audit logging in Airflow means keeping a record of all important actions and changes in the system. It helps track who did what and when.

beginner

Which Airflow component is responsible for storing audit logs?

The Airflow metadata database stores audit logs, recording events like user actions and task status changes.

intermediate

How can you enable audit logging in Airflow?

You enable audit logging by configuring Airflow's logging settings and ensuring the metadata database is set up to capture audit events.

beginner

Why is audit logging important in Airflow?

Audit logging helps with security, troubleshooting, and compliance by showing a clear history of actions and changes in Airflow.

beginner

Name one common use case for audit logs in Airflow.

One use case is tracking who triggered a workflow and when, which helps in debugging and accountability.

What does audit logging in Airflow primarily record?

A User actions and system changes

B Only task execution times

C Network traffic data

D CPU and memory usage

Audit logging records user actions and system changes to track what happened in Airflow.

Where are audit logs stored in Airflow?

A Metadata database

B Task logs folder

C External cloud storage only

D Airflow webserver cache

Audit logs are stored in the metadata database, which keeps track of system events.

Which of these is NOT a benefit of audit logging in Airflow?

A Better troubleshooting

B Faster task execution

C Improved security

D Compliance tracking

Audit logging does not directly make tasks run faster; it helps with security, troubleshooting, and compliance.

How can you enable audit logging in Airflow?

A Install a separate audit plugin only

B Disable task logs

C Configure logging settings and metadata database

D Use Airflow without any configuration

Audit logging requires configuring Airflow's logging and metadata database settings.

What is a common use of audit logs in Airflow?

A Scheduling new tasks

B Changing task code automatically

C Deleting old logs

D Tracking who triggered workflows

Audit logs help track who triggered workflows and when, aiding accountability.

Explain what audit logging is in Airflow and why it is important.

Think about how keeping a history of actions helps in managing Airflow.

Describe how audit logging is enabled and where logs are stored in Airflow.

Consider Airflow's configuration and database role.

Practice

1. What is the main purpose of audit logging in Apache Airflow?

easy

A. To speed up task execution

B. To manage Airflow plugins

C. To store DAG definitions

D. To record user actions for security and troubleshooting

Solution

1. Step 1: Understand audit logging concept

   Audit logging is designed to keep track of user actions and system events.

2. Step 2: Identify its purpose in Airflow

   This helps with security monitoring and troubleshooting issues by reviewing what happened.

3. Final Answer:

   To record user actions for security and troubleshooting -> Option D

4. Quick Check:

   Audit logging = record user actions [OK]

Hint: Audit logs track user actions for security [OK]

Common Mistakes:

• Confusing audit logs with performance logs
• Thinking audit logs store DAG code
• Assuming audit logs speed up tasks

2. Which section in airflow.cfg should you modify to enable audit logging?

easy

A. [core]

B. [logging]

C. [scheduler]

D. [webserver]

Solution

1. Step 1: Locate airflow.cfg configuration file

   This file contains sections for different Airflow components.

2. Step 2: Identify the section for logging settings

   The [logging] section controls log-related configurations including audit logging.

3. Final Answer:

   [logging] -> Option B

4. Quick Check:

   Audit logging config is under [logging] [OK]

Hint: Audit logging is set in [logging] section [OK]

Common Mistakes:

• Choosing [core] which is for general settings
• Selecting [scheduler] which controls scheduling
• Picking [webserver] which manages UI settings

3. Given this snippet from airflow.cfg:

[logging]
audit_log_enabled = True
audit_log_location = /var/log/airflow/audit.log

What will happen when a user triggers a DAG run?

medium

A. User action will be recorded in /var/log/airflow/audit.log

B. DAG will fail to start due to missing audit log

C. No audit log will be created because audit_log_enabled is False

D. Audit logs will be stored in the default Airflow logs folder

Solution

1. Step 1: Check audit_log_enabled value

   It is set to True, so audit logging is active.

2. Step 2: Check audit_log_location setting

   Logs will be saved to /var/log/airflow/audit.log as specified.

3. Final Answer:

   User action will be recorded in /var/log/airflow/audit.log -> Option A

4. Quick Check:

   Enabled True + location set = logs saved there [OK]

Hint: Enabled True means logs go to specified location [OK]

Common Mistakes:

• Assuming logs go to default folder ignoring config
• Thinking audit_log_enabled is False
• Believing DAG fails without audit log

4. You enabled audit logging but no logs appear in the specified file. Which is the most likely cause?

medium

A. Airflow scheduler is not running

B. audit_log_enabled is set to False

C. The audit_log_location path is incorrect or lacks write permission

D. DAGs are not defined properly

Solution

1. Step 1: Verify audit_log_enabled setting

   If it was False, no logs would be created, but question states it is enabled.

2. Step 2: Check file path and permissions

   If the path is wrong or Airflow lacks permission to write, logs won't appear.

3. Final Answer:

   The audit_log_location path is incorrect or lacks write permission -> Option C

4. Quick Check:

   Wrong path or no write permission blocks logs [OK]

Hint: Check file path and permissions first [OK]

Common Mistakes:

• Assuming scheduler not running causes no audit logs
• Blaming DAG definitions for audit logging issues
• Ignoring file system permissions

5. You want to ensure audit logs do not fill up disk space. Which approach is best to manage audit logging in Airflow?

hard

A. Configure log rotation on the audit_log_location file

B. Disable audit logging completely

C. Store audit logs in the Airflow database

D. Manually delete audit logs daily

Solution

1. Step 1: Understand audit log growth risk

   Audit logs can grow large and fill disk space if unmanaged.

2. Step 2: Choose best management method

   Configuring log rotation automatically archives and deletes old logs safely.

3. Step 3: Evaluate other options

   Disabling logs loses audit trail; storing in DB is not default; manual deletion is error-prone.

4. Final Answer:

   Configure log rotation on the audit_log_location file -> Option A

5. Quick Check:

   Log rotation prevents disk full from audit logs [OK]

Hint: Use log rotation to manage audit log size [OK]

Common Mistakes:

• Disabling audit logs instead of managing size
• Relying on manual deletion which is unreliable
• Assuming database storage is default or better