Example project to announce mDNS/Avahi services over dbus on resin.io / resinOS 2.0 devices.
The project deploys a trivial Python webserver, and uses a helper script, and
dbus-python
underneath to announce the service on the local network using the system Avahi.
Important: this will work only with resinOS 2.x devices, where the host OS will provide a system Avahi daemon! For resinOS 1.x devices check resin-mdns-service for an example how to announce a service with Avahi daemon installed within the container and adding the relevant service files.
If you are using the module in the avahi directory within this repository,
you can just call the following to announce the webserver, for example.
from avahi.service import AvahiService
avahiservice = AvahiService("resin webserver", "_http._tcp", 80)
Note that it's important to also set the correct DBUS_SYSTEM_BUS_ADDRESS value
to talk to the system dbus, as shown in the start.sh start script:
export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
or in many cases you can instead set it as an environment variable in the Dockerfile with
ENV DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
For more details on this please check the Dbus communication with hostOS section of the documentation.
Copyright 2017 Resinio Ltd
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.