Airflow可以通过使用DockerOperator和BashOperator来实现MySQL数据库的备份和恢复。
from datetime import datetime
from airflow import DAG
from airflow.operators.docker_operator import DockerOperator
default_args = {
'owner': 'airflow',
'depends_on_past': False,
'start_date': datetime(2021, 1, 1),
'email_on_failure': False,
'email_on_retry': False,
'retries': 1,
}
dag = DAG(
'mysql_backup',
default_args=default_args,
description='A simple DAG to backup MySQL database',
schedule_interval='0 0 * * *',
)
backup_task = DockerOperator(
task_id='mysql_backup_task',
image='mysql:latest',
api_version='auto',
command='mysqldump -h <MySQL_host> -u <username> -p<password> <database_name> > /backup/backup.sql',
volumes=['/path/to/backup:/backup'],
dag=dag,
)
from datetime import datetime
from airflow import DAG
from airflow.operators.bash_operator import BashOperator
default_args = {
'owner': 'airflow',
'depends_on_past': False,
'start_date': datetime(2021, 1, 1),
'email_on_failure': False,
'email_on_retry': False,
'retries': 1,
}
dag = DAG(
'mysql_restore',
default_args=default_args,
description='A simple DAG to restore MySQL database',
schedule_interval='0 0 * * *',
)
restore_task = BashOperator(
task_id='mysql_restore_task',
bash_command='docker exec -i $(docker ps -qf "ancestor=mysql:latest") mysql -h <MySQL_host> -u <username> -p<password> <database_name> < /backup/backup.sql',
dag=dag,
)
需要注意的是,上述示例中的<MySQL_host>
, <username>
, <password>
, <database_name>
和/path/to/backup
需要根据实际情况进行填写。同时,为了能够正确地访问MySQL容器和备份文件,需要保证Airflow和MySQL容器在同一个网络中,并且设置正确的权限和路径。