当Airflow DAG的触发失败时,有几种可能的解决方法。以下是一些常见的解决方案,包括代码示例:
from airflow import DAG
from airflow.operators.dummy_operator import DummyOperator
with DAG('my_dag', description='My Airflow DAG') as dag:
task_1 = DummyOperator(task_id='task_1')
task_2 = DummyOperator(task_id='task_2')
task_1 >> task_2
import psycopg2
def check_database_connection():
try:
conn = psycopg2.connect(host="localhost", database="my_database", user="my_user", password="my_password")
cursor = conn.cursor()
cursor.execute("SELECT 1")
result = cursor.fetchone()
print("Database connection successful")
except Exception as e:
print("Database connection failed:", str(e))
check_database_connection()
airflow scheduler
可以使用以下命令检查Airflow执行器的运行情况:
airflow worker
from datetime import datetime, timedelta
from airflow import DAG
from airflow.operators.dummy_operator import DummyOperator
with DAG('my_dag', description='My Airflow DAG', schedule_interval='@daily', start_date=datetime(2022, 1, 1)) as dag:
task_1 = DummyOperator(task_id='task_1')
task_2 = DummyOperator(task_id='task_2')
task_1 >> task_2
airflow logs --task_id --dag_id --execution_date
以上是一些常见的解决方法,可以帮助您解决Airflow DAG触发失败的问题。根据具体情况,您可能需要进一步调查和排除故障。