airflow 超时中断处理、流程中断retry、邮件预警

参考：

https://blog.csdn.net/z928727991/article/details/102744611

1、超时中断处理

在 default_args 参数中加入 ‘execution_timeout’: timedelta(hours=1) ，表示如果一小时还没有运行完，就置为失败

# encoding: utf-8
import airflow
import time
from airflow import DAG
from airflow.operators.bash_operator import BashOperator
from airflow.operators.dummy_operator import DummyOperator
from airflow.operators.python_operator import PythonOperator
from datetime import datetime, timedelta
from airflow.operators.dagrun_operator import TriggerDagRunOperator
 
 
default_args = {
    'owner': 'airflow',
    'depends_on_past': False,
    'execution_timeout': timedelta(hours=1),
    'start_date': airflow.utils.dates.days_ago(1),

2、流程中断retry

retries，retry_delay
retries 表示重试的次数，重试多少次后跳过此 task 。retry_delay 参数表示失败多久后进行重试，次数设置的是1分钟

de4c65baf941f8f2ed775339fd0c733a = BashOperator(
    task_id ='de4c65baf941f8f2ed775339fd0c733a',
    retries = 5,
    retry_delay = timedelta(minutes=1),
    bash_command =command,
    params={"table_name":"test"},
    trigger_rule='all_done',
    dag=dag)

参考：
https://www.cnblogs.com/zmc940317/p/13293685.html

3、邮件预警

需要先设置：
airflow.cfg中设置Email SMTP服务器
（smtp_password去邮箱后台获取；smtp_user与smtp_user填写一样，真实的邮箱全称）

args = {
    'owner': 'airflow',
    'start_date': start_date,
    'email': ['[email protected]'],
    'email_on_failure': True,    #失败之后再次发送
    'email_on_retry': True,
    'depends_on_past': True,
}