celery/extra/systemd/celery.service

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

[Service]
Type=forking
User=user
Group=users
EnvironmentFile=-/etc/conf.d/celery
WorkingDirectory=/opt/Myproject/
ExecStart=${CELERY_BIN} multi start $CELERYD_NODES \
    -A $CELERY_APP --pidfile=${CELERYD_PID_FILE} \
    --logfile=${CELERYD_LOG_FILE} --loglevel="${CELERYD_LOG_LEVEL}" \
    $CELERYD_OPTS
ExecStop=${CELERY_BIN} multi stopwait $CELERYD_NODES \
    --pidfile=${CELERYD_PID_FILE}
ExecReload=${CELERY_BIN} multi 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