service file for celery

celery.conf

# See
# http://docs.celeryproject.org/en/latest/tutorials/daemonizing.html#available-options

CELERY_APP="App name"
CELERYD_NODES="worker"
CELERYD_OPTS=""
CELERY_BIN="/usr/bin/celery"
CELERYD_PID_FILE="/var/run/celery/%n.pid"
CELERYD_LOG_FILE="/var/log/celery/%n.log"
CELERYD_LOG_LEVEL="INFO"

celery.service

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

[Service]
Type=simple
User=celery
Group=celery
EnvironmentFile=-/etc/celery.conf
WorkingDirectory=/path/to/project
ExecStart=/usr/bin/celery -A \
        $CELERY_APP $CELERYD_NODES --logfile=${CELERYD_LOG_FILE} \
        --pidfile=${CELERYD_PID_FILE} $CELERYD_OPTS
ExecStop=/usr/bin/celery stopwait $CELERYD_NODES \
        --pidfile=${CELERYD_PID_FILE}
ExecReload=/usr/bin/celery restart $CELERYD_NODES -A \
        $CELERY_APP --pidfile=${CELERYD_PID_FILE} --logfile=${CELERYD_LOG_FILE} \
        --loglevel="${CELERYD_LOG_LEVEL}" $CELERYD_OPTS

[Install]
WantedBy=multi-user.target