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如何通過Airflow監(jiān)控MySQL數(shù)據(jù)庫狀態(tài)

小樊
89
2024-08-10 22:36:36
欄目: 云計算

要通過Airflow監(jiān)控MySQL數(shù)據(jù)庫狀態(tài),可以使用Airflow的Sensor來定期檢查數(shù)據(jù)庫的狀態(tài)。以下是一種可能的方法:

  1. 創(chuàng)建一個自定義的MySQLSensor,用于檢查數(shù)據(jù)庫的狀態(tài)。該Sensor可以繼承自BaseSensorOperator,并在其中實現(xiàn)檢查數(shù)據(jù)庫狀態(tài)的邏輯。
from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.hooks.mysql_hook import MySqlHook
from datetime import datetime

class MySQLSensor(BaseSensorOperator):
    def __init__(self, mysql_conn_id, *args, **kwargs):
        super(MySQLSensor, self).__init__(*args, **kwargs)
        self.mysql_conn_id = mysql_conn_id

    def poke(self, context):
        mysql_hook = MySqlHook(mysql_conn_id=self.mysql_conn_id)
        conn = mysql_hook.get_conn()
        cursor = conn.cursor()
        cursor.execute("SELECT 1")
        result = cursor.fetchall()
        cursor.close()
        conn.close()
        return bool(result)
  1. 在Airflow DAG 中使用該Sensor來定期檢查MySQL數(shù)據(jù)庫的狀態(tài)。
from airflow import DAG
from airflow.operators.dummy_operator import DummyOperator
from airflow.operators.python_operator import PythonOperator
from datetime import datetime, timedelta
from MySQLSensor import MySQLSensor

default_args = {
    'owner': 'airflow',
    'depends_on_past': False,
    'start_date': datetime(2021, 1, 1),
    'email_on_failure': False,
    'email_on_retry': False,
    'retries': 1,
    'retry_delay': timedelta(minutes=5),
}

dag = DAG('monitor_mysql_database', default_args=default_args, schedule_interval=timedelta(minutes=5))

start = DummyOperator(task_id='start', dag=dag)

check_mysql = MySQLSensor(task_id='check_mysql', mysql_conn_id='mysql_conn', poke_interval=30, timeout=60, dag=dag)

end = DummyOperator(task_id='end', dag=dag)

start >> check_mysql >> end

在上面的例子中,我們創(chuàng)建了一個名為monitor_mysql_database的DAG,其中包含了一個check_mysql任務,該任務會定期檢查名為mysql_conn的MySQL連接的狀態(tài)??梢愿鶕?jù)實際需求修改Sensor的邏輯和DAG的配置。

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