airflow是一個常駐任務，我們希望它在任務失敗后可以自動重啟，systemd可以幫助我們實現這個功能，首先需要配置如下文件
/etc/sysconfig/airflow
AIRFLOW_CONFIG=/root/airflow/airflow.cfg AIRFLOW_HOME=/root/airflow
HADOOP_USER_NAME=hdfs
/usr/lib/systemd/system/airflow-webserver.service
[Unit] Description=Airflow webserver daemon [Service] EnvironmentFile=/etc/sysconfig/airflow User=root Group=root Type=simple ExecStart=/root/miniconda3/envs/py36/bin/airflow webserver Restart=on-failure RestartSec=5s PrivateTmp=true [Install] WantedBy=multi-user.target
/usr/lib/systemd/system/airflow-flower.service
[Unit] Description=Airflow flower daemon [Service] EnvironmentFile=/etc/sysconfig/airflow User=root Group=root Type=simple ExecStart=/root/miniconda3/envs/py36/bin/airflow flower Restart=on-failure RestartSec=5s PrivateTmp=true
/usr/lib/systemd/system/airflow-scheduler.service
[Unit] Description=Airflow scheduler daemon After=network.target postgresql.service mysql.service redis.service rabbitmq-server.service Wants=redis.service [Service] EnvironmentFile=/etc/sysconfig/airflow User=root Group=root Type=simple ExecStart=/root/miniconda3/envs/py36/bin/airflow scheduler Restart=always RestartSec=5s [Install] WantedBy=multi-user.target
/usr/lib/systemd/system/airflow-worker.service
[Unit] Description=Airflow celery worker daemon After=network.target postgresql.service mysql.service redis.service rabbitmq-server.service Wants=mysql.service redis.service [Service] EnvironmentFile=/etc/sysconfig/airflow User=root Group=root Type=simple ExecStart=/root/miniconda3/envs/py36/bin/airflow worker Restart=on-failure RestartSec=10s [Install] WantedBy=multi-user.target
配置完，之后執行以下命令
#重載所有修改過的配置文件 sudo systemctl daemon-reload #查看啟動耗時,關鍵是可以查看啟動失敗的原因 sudo systemd-analyze verify airflow-webserver.service #查看啟動失敗任務的啟動日志 sudo journalctl -u airflow-webserver.service #查看服務狀態 systemctl status airflow-scheduler.service #判斷是否自動重啟 sudo systemctl is-enabled airflow-worker.service sudo systemctl enable airflow-worker.service #重啟任務 systemctl stop airflow-scheduler.service systemctl start airflow-scheduler.service
報錯記錄：
FileNotFoundError: [Errno 2] No such file or directory: 'gunicorn'
這是因為沒有把python3的path加入到PATH中，解決思路找到python3的路徑加入到PATH即可
備注：
又有報錯FileNotFoundError: [Errno 2] No such file or directory: 'airflow': 'airflow'
反反復復始終未能解決，最終webserver/scheduler以systemctl方式啟動，worker和flower以airflow worker -D的方式啟動