danswer/backend/supervisord.conf

[supervisord]
nodaemon=true
logfile=/var/log/supervisord.log

# Indexing is the heaviest job, also requires some CPU intensive steps
# Cannot place this in Celery for now because Celery must run as a single process (see note below)
# Indexing uses multi-processing to speed things up
[program:document_indexing]
environment=CURRENT_PROCESS_IS_AN_INDEXING_JOB=true
command=python danswer/background/update.py
stdout_logfile=/var/log/update.log
stdout_logfile_maxbytes=52428800
redirect_stderr=true
autorestart=true

# Background jobs that must be run async due to long time to completion
# NOTE: due to an issue with Celery + SQLAlchemy 
# (https://github.com/celery/celery/issues/7007#issuecomment-1740139367)
# we must use the threads pool instead of the default prefork pool for now
# in order to avoid intermittent errors like:
# `billiard.exceptions.WorkerLostError: Worker exited prematurely: signal 11 (SIGSEGV)`. 
#
# This means workers will not be able take advantage of multiple CPU cores 
# on a system, but this should be okay for now since all our celery tasks are
# relatively compute-light (e.g. they tend to just make a bunch of requests to 
# Vespa / Postgres)
[program:celery_worker]
command=celery -A danswer.background.celery worker --pool=threads --autoscale=3,10 --loglevel=INFO --logfile=/var/log/celery_worker.log
stdout_logfile=/var/log/celery_worker_supervisor.log
stdout_logfile_maxbytes=52428800
redirect_stderr=true
autorestart=true

# Job scheduler for periodic tasks
[program:celery_beat]
command=celery -A danswer.background.celery beat --loglevel=INFO --logfile=/var/log/celery_beat.log
stdout_logfile=/var/log/celery_beat_supervisor.log
stdout_logfile_maxbytes=52428800
redirect_stderr=true
autorestart=true

# Listens for Slack messages and responds with answers
# for all channels that the DanswerBot has been added to.
# If not setup, this will just fail 5 times and then stop.
# More details on setup here: https://docs.danswer.dev/slack_bot_setup
[program:slack_bot_listener]
command=python danswer/danswerbot/slack/listener.py
stdout_logfile=/var/log/slack_bot_listener.log
stdout_logfile_maxbytes=52428800
redirect_stderr=true
autorestart=true
startretries=5
startsecs=60

# Pushes all logs from the above programs to stdout
# No log rotation here, since it's stdout it's handled by the Docker container loglevel
# To be standard across all the services
[program:log-redirect-handler]
command=tail -qF /var/log/update.log /var/log/celery_worker.log /var/log/celery_worker_supervisor.log /var/log/celery_beat.log /var/log/celery_beat_supervisor.log /var/log/slack_bot_listener.log
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
redirect_stderr=true
autorestart=true