Airflow

Airflow Operations

Use af commands to query, manage, and troubleshoot Airflow workflows.

Running the CLI

Run all af commands using uvx (no installation required):

uvx --from astro-airflow-mcp af <command>

Throughout this document, af is shorthand for uvx --from astro-airflow-mcp af.

Instance Configuration

Manage multiple Airflow instances with persistent configuration:

# Add a new instance
af instance add prod --url https://airflow.example.com --token "$API_TOKEN"
af instance add staging --url https://staging.example.com --username admin --password admin

# List and switch instances
af instance list      # Shows all instances in a table
af instance use prod  # Switch to prod instance
af instance current   # Show current instance
af instance delete old-instance

# Auto-discover instances (use --dry-run to preview first)
af instance discover --dry-run        # Preview all discoverable instances
af instance discover                  # Discover from all backends (astro, local)
af instance discover astro            # Discover Astro deployments only
af instance discover astro --all-workspaces  # Include all accessible workspaces
af instance discover local            # Scan common local Airflow ports
af instance discover local --scan     # Deep scan all ports 1024-65535

# IMPORTANT: Always run with --dry-run first and ask for user consent before
# running discover without it. The non-dry-run mode creates API tokens in
# Astro Cloud, which is a sensitive action that requires explicit approval.

# Override instance for a single command
af --instance staging dags list

Config file: ~/.af/config.yaml (override with --config or AF_CONFIG env var)

Tokens in config can reference environment variables using ${VAR} syntax:

instances:
- name: prod
  url: https://airflow.example.com
  auth:
    token: ${AIRFLOW_API_TOKEN}

Or use environment variables directly (no config file needed):

export AIRFLOW_API_URL=http://localhost:8080
export AIRFLOW_AUTH_TOKEN=your-token-here
# Or username/password:
export AIRFLOW_USERNAME=admin
export AIRFLOW_PASSWORD=admin

Or CLI flags: af --airflow-url http://localhost:8080 --token "$TOKEN" <command>

Quick Reference

User Intent Patterns

DAG Operations

• "What DAGs exist?" / "List all DAGs" -> af dags list
• "Tell me about DAG X" / "What is DAG Y?" -> af dags explore <dag_id>
• "What's the schedule for DAG X?" -> af dags get <dag_id>
• "Show me the code for DAG X" -> af dags source <dag_id>
• "Stop DAG X" / "Pause this workflow" -> af dags pause <dag_id>
• "Resume DAG X" -> af dags unpause <dag_id>
• "Are there any DAG errors?" -> af dags errors
• "Create a new DAG" / "Write a pipeline" -> use the authoring-dags skill

Run Operations

• "What runs have executed?" -> af runs list
• "Run DAG X" / "Trigger the pipeline" -> af runs trigger <dag_id>
• "Run DAG X and wait" -> af runs trigger-wait <dag_id>
• "Why did this run fail?" -> af runs diagnose <dag_id> <run_id>
• "Test this DAG and fix if it fails" -> use the testing-dags skill

Task Operations

• "What tasks are in DAG X?" -> af tasks list <dag_id>
• "Get task logs" / "Why did task fail?" -> af tasks logs <dag_id> <run_id> <task_id>
• "Full root cause analysis" / "Diagnose and fix" -> use the debugging-dags skill

Data Operations

• "Is the data fresh?" / "When was this table last updated?" -> use the checking-freshness skill
• "Where does this data come from?" -> use the tracing-upstream-lineage skill
• "What depends on this table?" / "What breaks if I change this?" -> use the tracing-downstream-lineage skill

System Operations

• "What version of Airflow?" -> af config version
• "What connections exist?" -> af config connections
• "Are pools full?" -> af config pools
• "Is Airflow healthy?" -> af health

API Exploration

• "What API endpoints are available?" -> af api ls
• "Find variable endpoints" -> af api ls --filter variable
• "Access XCom values" / "Get XCom" -> af api xcom-entries -F dag_id=X -F task_id=Y
• "Get event logs" / "Audit trail" -> af api event-logs -F dag_id=X
• "Create connection via API" -> af api connections -X POST --body '{...}'
• "Create variable via API" -> af api variables -X POST -F key=name -f value=val

Common Workflows

Investigate a Failed Run

# 1. List recent runs to find failure
af runs list --dag-id my_dag

# 2. Diagnose the specific run
af runs diagnose my_dag manual__2024-01-15T10:00:00+00:00

# 3. Get logs for failed task (from diagnose output)
af tasks logs my_dag manual__2024-01-15T10:00:00+00:00 extract_data

Morning Health Check

# 1. Overall system health
af health

# 2. Check for broken DAGs
af dags errors

# 3. Check pool utilization
af config pools

Understand a DAG

# Get comprehensive overview (metadata + tasks + source)
af dags explore my_dag

Check Why DAG Isn't Running

# Check if paused
af dags get my_dag

# Check for import errors
af dags errors

# Check recent runs
af runs list --dag-id my_dag

Trigger and Monitor

# Option 1: Trigger and wait (blocking)
af runs trigger-wait my_dag --timeout 1800

# Option 2: Trigger and check later
af runs trigger my_dag
af runs get my_dag <run_id>

Output Format

All commands output JSON (except instance commands which use human-readable tables):

af dags list
# {
#   "total_dags": 5,
#   "returned_count": 5,
#   "dags": [...]
# }

Use jq for filtering:

# Find failed runs
af runs list | jq '.dag_runs[] | select(.state == "failed")'

# Get DAG IDs only
af dags list | jq '.dags[].dag_id'

# Find paused DAGs
af dags list | jq '[.dags[] | select(.is_paused == true)]'

Task Logs Options

# Get logs for specific retry attempt
af tasks logs my_dag run_id task_id --try 2

# Get logs for mapped task index
af tasks logs my_dag run_id task_id --map-index 5

Direct API Access with af api

Use af api for endpoints not covered by high-level commands (XCom, event-logs, backfills, etc).

# Discover available endpoints
af api ls
af api ls --filter variable

# Basic usage
af api dags
af api dags -F limit=10 -F
af api variables -X POST -F key=my_var -f value="my value"
af api variables/old_var -X DELETE

Field syntax: -F key=value auto-converts types, -f key=value keeps as string.

Full reference: See api-reference.md for all options, common endpoints (XCom, event-logs, backfills), and examples.

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