/etc/default/celeryd:
# %n will be replaced with the nodename.
CELERYD_LOG_FILE="/var/log/celery/%n.log"
CELERYD_PID_FILE="/var/run/celery/%n.pid"

# Workers should run as an unprivileged user.
CELERYD_USER="celery"
CELERYD_GROUP="celerygroup"



Permissions:

sudo mkdir /var/log/celery/
sudo mkdir /var/run/celery/

sudo adduser celery
sudo groupadd celerygroup
sudo usermod -a -G celerygroup celery
sudo chgrp -R celerygroup /var/log/celery/
sudo chgrp -R celerygroup /var/run/celery/
sudo chmod -R 770 /var/log/celery/
sudo chmod -R 770 /var/run/celery/