celery daemon using systemd not running - celery

Question

i am using ubuntu 16 and systemd for running celery as a daemon.i have created the unit file also but i am not able to run celery as a service. why is this error?
/etc/systemd/system/celery.service
[Unit]
Description=Celery Service
After=network.target
[Service]
Type=forking
User=celery
Group=celery
EnvironmentFile=-/etc/default/celery
WorkingDirectory=/srv/weaver/src
ExecStart=/bin/sh -c '${CELERY_BIN} multi start ${CELERYD_NODES} \
-A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
--logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'
ExecStop=/bin/sh -c '${CELERY_BIN} multi stopwait ${CELERYD_NODES} \
--pidfile=${CELERYD_PID_FILE}'
ExecReload=/bin/sh -c '${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
file at /etc/default/celery
ENABLED="true"
CELERYD_NODES="worker1"
#CELERYD_NODES="worker1 worker2 worker3"
CELERY_BIN="/usr/local/bin/celery"
CELERY_APP="main:celery_app"
CELERYD_CHDIR="/srv/weaver/src"
CELERYD_OPTS=" --queue=weaver --time-limit=100000 --concurrency=2"
CELERYD_LOG_FILE="/var/log/celery/%N.log"
CELERYD_PID_FILE="/var/run/celery2/%N.pid"
CELERYD_USER="celery"
CELERYD_GROUP="celery"
CELERY_CREATE_DIRS=1
# Change Celery Beat
CELERYBEAT_CHDIR="/srv/weaver/src"
# Log files
CELERYBEAT_LOG_FILE="/var/log/celery/celerybeat.log"
# Celery Beat Log files
CELERYBEAT_PID_FILE="/var/run/celery/celerybeat.pid"
# Scheduler for celery
CELERYBEAT_OPTS=" --pidfile=/var/run/celery/celerybeat.pid --sch
OUTPUT OF RUNNING SERVICE
● celery.service - Celery Service
Loaded: loaded (/etc/systemd/system/celery.service; disabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2017-01-12 17:12:32 IST; 2min 17s ago
Process: 18561 ExecStop=/bin/sh -c ${CELERY_BIN} multi stopwait ${CELERYD_NODES} --pidfile=${CELERYD_PID_FILE} (code=exited, status=0/SUCCESS)
Process: 18540 ExecStart=/bin/sh -c ${CELERY_BIN} multi start ${CELERYD_NODES} -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} --logfile=${CELERYD_LOG_FIL
Main PID: 18555 (code=exited, status=1/FAILURE)
Jan 12 17:12:30 fb01 systemd[1]: Starting Celery Service...
Jan 12 17:12:31 fb01 sh[18540]: celery multi v3.1.23 (Cipater)
Jan 12 17:12:31 fb01 sh[18540]: > Starting nodes...
Jan 12 17:12:31 fb01 sh[18540]: > worker1#fb01: OK
Jan 12 17:12:31 fb01 systemd[1]: Started Celery Service.
Jan 12 17:12:32 fb01 systemd[1]: celery.service: Main process exited, code=exited, status=1/FAILURE
Jan 12 17:12:32 fb01 sh[18561]: celery multi v3.1.23 (Cipater)
Jan 12 17:12:32 fb01 sh[18561]: > worker1#fb01: DOWN
Jan 12 17:12:32 fb01 systemd[1]: celery.service: Unit entered failed state.
Jan 12 17:12:32 fb01 systemd[1]: celery.service: Failed with result 'exit-code'.

Answer 1

I just hit this exact issue. My problem was a configuration issue. In particular, I wasn't setting
CELERYD_LOG_LEVEL
in my environment file. (/etc/default/celeryd in your case). It looks like you have made the same mistake.
(I also had a few other configuration issues that I needed to resolve. I discovered these by running celery on the commandline.)

Answer 2

I had this same symptom, turned out to be permissions.
In my case something like:
chmod o+x /srv/weaver/src
sorted it.
Note: That this is not the best way to enable the required permission but that's not pertinent to this answer.