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Explain host network mode is mandatory (#13247)

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Erik Montnemery 2020-05-01 22:47:55 +02:00 committed by GitHub
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source/_docs/installation/docker.markdown
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@ -8,6 +8,8 @@ redirect_from: /getting-started/installation-docker/
These below instructions are for an installation of Home Assistant Core running in your own Docker environment, which you manage yourself.
Note that Docker command line option `--net=host` or the compose file equivalent `network_mode: host` must be used to put put Home Assistant on the host's network, otherwise certain functionality - including mDNS and UPnP - will break. The `-p` command line option or the compose file equivalent `ports:` is not compatible with host networking mode and must not be used.
For an installation of Home Assistant Supervised, which includes Home Assistant's add-on ecosystem, see the instructions for installing [Home Assistant Supervised on a generic Linux host](/hassio/installation/#alternative-install-home-assistant-supervised-on-a-generic-linux-host/).
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@ -38,13 +40,11 @@ docker run --init -d --name="home-assistant" -e "TZ=America/New_York" -v /home/p
When using `docker-ce` (or `boot2docker`) on macOS, you are unable to map the local timezone to your Docker container ([Docker issue](https://github.com/docker/for-mac/issues/44)). Instead of `-v /etc/localtime:/etc/localtime:ro`, just pass in the timezone environment variable when you launch the container, e.g, `-e "TZ=America/Los_Angeles"`. Replace "America/Los_Angeles" with [your timezone](http://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
If you wish to browse directly to `http://localhost:8123` from your macOS host, meaning forward ports directly to the container, replace the `--net=host` switch with `-p 8123:8123`. More detail can be found in [the Docker forums](https://forums.docker.com/t/should-docker-run-net-host-work/14215/10).
```bash
docker run --init -d --name="home-assistant" -e "TZ=America/Los_Angeles" -v /PATH_TO_YOUR_CONFIG:/config -p 8123:8123 homeassistant/home-assistant:stable
```
Alternatively, `docker-compose` works with any recent release of `docker-ce` on macOS. Note that (further down this page) we provide an example `docker-compose.yml` however it differs from the `docker run` example above. To make the .yml directives match, you would need to make _two_ changes: first add the equivalent `ports:` directive, then _remove_ the `network_mode: host` section. This is because `Port mapping is incompatible with network_mode: host:`. More details can be found at [Docker networking documentation](https://docs.docker.com/network/). Note also the `/dev/tty*` device name used by your Arduino etc. devices will differ from the Linux example, so the compose `mount:` may require updates.
Alternatively, `docker-compose` works with any recent release of Docker CE on macOS. Note the `/dev/tty*` device name used by your Arduino etc. devices will differ from the Linux example, so the compose `mount:` may require updates.
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