garage/doc/book/src/cookbook/systemd.md

# Starting Garage with systemd

We make some assumptions for this systemd deployment. 

  - Your garage binary is located at `/usr/local/bin/garage`.

  - Your configuration file is located at `/etc/garage.toml`.

  - Your `garage.toml` must be set with  `metadata_dir=/var/lib/garage/meta` and `data_dir=/var/lib/garage/data`. This is mandatory to use `systemd` hardening feature [Dynamic User](https://0pointer.net/blog/dynamic-users-with-systemd.html). Note that in your host filesystem, Garage data will be held in `/var/lib/private/garage`.



Create a file named `/etc/systemd/system/garage.service`:

```toml
[Unit]
Description=Garage Data Store
After=network-online.target
Wants=network-online.target

[Service]
Environment='RUST_LOG=garage=info' 'RUST_BACKTRACE=1'
ExecStart=/usr/local/bin/garage server
StateDirectory=garage
DynamicUser=true
ProtectHome=true
NoNewPrivileges=true

[Install]
WantedBy=multi-user.target
```

*A note on hardening: garage will be run as a non privileged user, its user id is dynamically allocated by systemd. It cannot access (read or write) home folders (/home, /root and /run/user), the rest of the filesystem can only be read but not written, only the path seen as /var/lib/garage is writable as seen by the service (mapped to /var/lib/private/garage on your host). Additionnaly, the process can not gain new privileges over time.*

To start the service then automatically enable it at boot:

```bash
sudo systemctl start garage
sudo systemctl enable garage
```

To see if the service is running and to browse its logs:

```bash
sudo systemctl status garage
sudo journalctl -u garage
```

If you want to modify the service file, do not forget to run `systemctl daemon-reload`
to inform `systemd` of your modifications.