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polylan-submitter/deploy/systemd/polylan-submitter.service
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2026-10-24 04:15:31 +02:00

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# Prod web process: gunicorn master + uvicorn ASGI workers, behind Caddy.
#
# `systemctl reload polylan-submitter` sends HUP to the gunicorn master: it
# keeps the :7777 socket open, boots new workers on the new code, then
# gracefully stops the old ones - no downtime. See deploy/systemd/deploy.sh.
#
# Installed to /etc/systemd/system/ by deploy.sh: when this file changed it
# does daemon-reload + a full restart (HUP keeps the old ExecStart args).
[Unit]
Description=PolyLAN submitter (gunicorn + uvicorn workers)
After=network.target
[Service]
Type=simple
Restart=always
RestartSec=1
User=root
WorkingDirectory=/home/caddy/polylan-submitter/polylan_submitter
# Relative to WorkingDirectory, loaded by settings.py via python-dotenv.
Environment="SETTINGS_ENV_FILE_LOCATION=polylan_submitter/.env"
# No --preload: with it, HUP re-forks from the already imported (old) code.
# --forwarded-allow-ips replaces daphne's --proxy-headers: trust
# X-Forwarded-* only from Caddy (local here).
ExecStart=/home/caddy/polylan-submitter/.venv/bin/gunicorn polylan_submitter.asgi:application \
--worker-class uvicorn_worker.UvicornWorker \
--workers 2 \
--bind 0.0.0.0:7777 \
--graceful-timeout 20 \
--forwarded-allow-ips 127.0.0.1
ExecReload=/bin/kill -s HUP $MAINPID
# SIGTERM to the master only, it then drains its workers (graceful-timeout).
KillMode=mixed
TimeoutStopSec=30
[Install]
WantedBy=multi-user.target