Autostart using systemd


Newer Linux distributions are trending towards using systemd for managing daemons. Typically, systems based on Fedora, ArchLinux, or Debian (8 or later) use systemd. This includes Ubuntu releases including and after 15.04, CentOS, and Red Hat. If you are unsure if your system is using systemd, you may check with the following command:

$ ps -p 1 -o comm=

If the preceding command returns the string systemd, continue with the instructions below.

A service file is needed to control Home Assistant with systemd. The template below should be created using a text editor. Note, root permissions via sudo will likely be needed. The following should be noted to modify the template:

  • ExecStart contains the path to hass and this may vary. Check with whereis hass for the location.
  • For most systems, the file is /etc/systemd/system/[email protected][your user].service with [your user] replaced by the user account that Home Assistant will run as (normally homeassistant). In particular, this is the case for Ubuntu 16.04.
  • If unfamiliar with command-line text editors, sudo nano -w [filename] can be used with [filename] replaced with the full path to the file. Ex. sudo nano -w /etc/systemd/system/[email protected][your user].service. After text entered, press CTRL-X then press Y to save and exit.
  • If you’re running Home Assistant in a Python virtual environment or a Docker container, please skip to the appropriate template listed below.
[Unit]
Description=Home Assistant
After=network-online.target

[Service]
Type=simple
User=%i
ExecStart=/usr/bin/hass

[Install]
WantedBy=multi-user.target

Python virtual environment

If you’ve setup Home Assistant in virtualenv following our Python installation guide or manual installation guide for Raspberry Pi, the following template should work for you. If Home Assistant install is not located at /srv/homeassistant, please modify the ExecStart= line appropriately.

[Unit]
Description=Home Assistant
After=network-online.target

[Service]
Type=simple
User=%i
ExecStart=/srv/homeassistant/bin/hass -c "/home/homeassistant/.homeassistant"

[Install]
WantedBy=multi-user.target

Docker

If you want to use Docker, the following template should work for you.

[Unit]
Description=Home Assistant
Requires=docker.service
After=docker.service

[Service]
Restart=always
RestartSec=3
ExecStart=/usr/bin/docker run --name="home-assistant-%i" -v /home/%i/.homeassistant/:/config -v /etc/localtime:/etc/localtime:ro --net=host homeassistant/home-assistant
ExecStop=/usr/bin/docker stop -t 2 home-assistant-%i
ExecStopPost=/usr/bin/docker rm -f home-assistant-%i

[Install]
WantedBy=multi-user.target

Next Steps

You need to reload systemd to make the daemon aware of the new configuration.

$ sudo systemctl --system daemon-reload

To have Home Assistant start automatically at boot, enable the service.

$ sudo systemctl enable [email protected][your user]

To disable the automatic start, use this command.

$ sudo systemctl disable [email protected][your user]

To start Home Assistant now, use this command.

$ sudo systemctl start [email protected][your user]

You can also substitute the start above with stop to stop Home Assistant, restart to restart Home Assistant, and ‘status’ to see a brief status report as seen below.

$ sudo systemctl status [email protected][your user]
● [email protected] - Home Assistant for [your user]
   Loaded: loaded (/etc/systemd/system/[email protected][your user].service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2016-03-26 12:26:06 CET; 13min ago
 Main PID: 30422 (hass)
   CGroup: /system.slice/system-home\x2dassistant.slice/[email protected][your user].service
           ├─30422 /usr/bin/python3 /usr/bin/hass
           └─30426 /usr/bin/python3 /usr/bin/hass
[...]

To get Home Assistant’s logging output, simple use journalctl.

$ sudo journalctl -f -u [email protected][your user]

Because the log can scroll quite quickly, you can select to view only the error lines:

$ sudo journalctl -f -u [email protected][your user] | grep -i 'error'

When working on Home Assistant, you can easily restart the system and then watch the log output by combining the above commands using &&

$ sudo systemctl restart [email protected][your user] && sudo journalctl -f -u [email protected][your user]