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Make lifepo4wered-daemon the primary process in run.sh

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The daemon must contact the UPS within PI_BOOT_TO seconds of power-on
or the UPS cuts power. Start it immediately via exec as the container's
main process; run the MQTT monitor in a background loop with 30s restart
backoff so Supervisor API delays or monitor crashes can never delay or
kill the daemon.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
vaku
2026-07-18 01:18:46 +03:00
parent 25b3e2dcc4
commit 952fc24e90
2 changed files with 49 additions and 31 deletions
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12
docs/superpowers/specs/2026-07-18-mqtt-monitor-design.md
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@@ -45,10 +45,14 @@ present and one subprocess call reads everything at once.
- Dockerfile: add `python3` + `py3-paho-mqtt` (Alpine packages), copy script
and `run.sh`, `CMD ["/run.sh"]`.
- `run.sh` (bashio): pull MQTT host/port/user/password from Supervisor
services API (works out of the box with the Mosquitto addon), allow
overrides from addon options, start `lifepo4wered-daemon -f` in the
background, run the monitor in the foreground.
- `run.sh` (bashio): `lifepo4wered-daemon -f` is the exec'd main process,
started immediately — it must contact the UPS within PI_BOOT_TO seconds of
power-on or the UPS cuts power, so nothing (Supervisor API calls included)
may delay it and monitor failures must never take it down. The monitor runs
in a background subshell that pulls MQTT host/port/user/password from the
Supervisor services API (works out of the box with the Mosquitto addon,
addon options can override) and restarts the monitor with 30 s backoff if
it exits.
- `config.json`: add `"services": ["mqtt:need"]`, addon options
(`poll_interval`, optional MQTT overrides), bump version.

68
hassio-addon-lifepo4wered/run.sh
View File

@@ -1,33 +1,47 @@
#!/usr/bin/with-contenv bashio
export POLL_INTERVAL="$(bashio::config 'poll_interval')"
# The daemon must contact the UPS within PI_BOOT_TO seconds of power-on,
# otherwise the UPS assumes the boot failed and cuts power. It is therefore
# the main process, started before any MQTT/Supervisor API calls, and the
# monitor runs on the side where its failures can never take the daemon down.
# Manual MQTT settings from addon options win; otherwise use the broker
# provided by the Supervisor (e.g. the Mosquitto addon).
if bashio::config.has_value 'mqtt_host'; then
export MQTT_HOST="$(bashio::config 'mqtt_host')"
if bashio::config.has_value 'mqtt_port'; then
export MQTT_PORT="$(bashio::config 'mqtt_port')"
setup_mqtt_env() {
export POLL_INTERVAL="$(bashio::config 'poll_interval')"
# Manual MQTT settings from addon options win; otherwise use the broker
# provided by the Supervisor (e.g. the Mosquitto addon).
if bashio::config.has_value 'mqtt_host'; then
export MQTT_HOST="$(bashio::config 'mqtt_host')"
if bashio::config.has_value 'mqtt_port'; then
export MQTT_PORT="$(bashio::config 'mqtt_port')"
fi
if bashio::config.has_value 'mqtt_user'; then
export MQTT_USER="$(bashio::config 'mqtt_user')"
fi
if bashio::config.has_value 'mqtt_password'; then
export MQTT_PASSWORD="$(bashio::config 'mqtt_password')"
fi
elif bashio::services.available "mqtt"; then
export MQTT_HOST="$(bashio::services mqtt 'host')"
export MQTT_PORT="$(bashio::services mqtt 'port')"
export MQTT_USER="$(bashio::services mqtt 'username')"
export MQTT_PASSWORD="$(bashio::services mqtt 'password')"
else
bashio::log.warning \
"No MQTT broker configured and no mqtt service available;" \
"trying localhost:1883"
fi
if bashio::config.has_value 'mqtt_user'; then
export MQTT_USER="$(bashio::config 'mqtt_user')"
fi
if bashio::config.has_value 'mqtt_password'; then
export MQTT_PASSWORD="$(bashio::config 'mqtt_password')"
fi
elif bashio::services.available "mqtt"; then
export MQTT_HOST="$(bashio::services mqtt 'host')"
export MQTT_PORT="$(bashio::services mqtt 'port')"
export MQTT_USER="$(bashio::services mqtt 'username')"
export MQTT_PASSWORD="$(bashio::services mqtt 'password')"
else
bashio::log.warning \
"No MQTT broker configured and no mqtt service available;" \
"trying localhost:1883"
fi
}
(
setup_mqtt_env
bashio::log.info "Starting MQTT monitor (poll interval: ${POLL_INTERVAL}s)"
while true; do
python3 /usr/bin/lifepo4wered_monitor.py || true
bashio::log.warning "MQTT monitor exited; restarting in 30s"
sleep 30
done
) &
bashio::log.info "Starting lifepo4wered-daemon"
lifepo4wered-daemon -f &
bashio::log.info "Starting MQTT monitor (poll interval: ${POLL_INTERVAL}s)"
exec python3 /usr/bin/lifepo4wered_monitor.py
exec lifepo4wered-daemon -f