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systemd 运行celery

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However, the init.d script should still work in those Linux distributions as well since systemd provides the systemd-sysv compatiblity layer which generates services automatically from the init.d scripts we provide.

官网已经有了相关的教程http://docs.celeryproject.org/en/latest/userguide/daemonizing.html#usage-systemd， 但是在实际操作的时候发现按照教程来配置无法正常启动。会报错，于是把服务简化了一下，把配置和服务信息写到了一起。如果你也遇到这个问题可以尝试下面的简化脚本：

[Unit]
Description=Celery Service
After=network.target

[Service]
WorkingDirectory=/var/www/html
ExecStart=/usr/local/bin/celery -A proj worker --logfile=/var/log/celery/celery.log  --loglevel="INFO"

Restart=on-failure

#3秒后启动
RestartSec=3s

[Install]
WantedBy=multi-user.target

系统Ubuntu 18.04， systemd版本：

root@mars:/etc/systemd/system# systemctl --version
systemd 229
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP 
+GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN
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