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173 lines
4.2 KiB
Markdown
173 lines
4.2 KiB
Markdown
# Running headscale on Linux
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## Goal
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This documentation has the goal of showing a user how-to set up and run `headscale` on Linux.
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In additional to the "get up and running section", there is an optional [SystemD section](#running-headscale-in-the-background-with-systemd)
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describing how to make `headscale` run properly in a server environment.
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## Configure and run `headscale`
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1. Download the latest [`headscale` binary from GitHub's release page](https://github.com/juanfont/headscale/releases):
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```shell
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wget --output-document=/usr/local/bin/headscale \
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https://github.com/juanfont/headscale/releases/download/v<HEADSCALE VERSION>/headscale_<HEADSCALE VERSION>_linux_<ARCH>
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```
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2. Make `headscale` executable:
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```shell
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chmod +x /usr/local/bin/headscale
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```
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3. Prepare a direction to hold `headscale` configuration and the [SQLite](https://www.sqlite.org/) database:
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```shell
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# Directory for configuration
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mkdir -p /etc/headscale
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# Directory for Database, and other variable data (like certificates)
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mkdir -p /var/lib/headscale
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```
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4. Create an empty SQlite datebase:
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```shell
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touch /var/lib/headscale/db.sqlite
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```
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5. Create a `headscale` configuration:
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```shell
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touch /etc/headscale/config.yaml
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```
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It is **strongly recommended** to copy and modifiy the [example configuration](../config-example.yaml)
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from the [headscale repository](../)
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6. Start the headscale server:
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```shell
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headscale serve
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```
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This command will start `headscale` in the current terminal session.
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---
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To continue the tutorial, open a new terminal and let it run in the background.
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Alternatively use terminal emulators like [tmux](https://github.com/tmux/tmux) or [screen](https://www.gnu.org/software/screen/).
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To run `headscale` in the background, please follow the steps in the [SystemD section](#running-headscale-in-the-background-with-systemd) before continuing.
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7. Verify `headscale` is running:
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Verify `headscale` is available:
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```shell
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curl http://127.0.0.1:8080/metrics
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```
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8. Create a namespace ([tailnet](https://tailscale.com/kb/1136/tailnet/)):
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```shell
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headscale namespaces create myfirstnamespace
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```
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### Register a machine (normal login)
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On a client machine, execute the `tailscale` login command:
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```shell
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tailscale up --login-server YOUR_HEADSCALE_URL
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```
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Register the machine:
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```shell
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headscale --namespace myfirstnamespace nodes register --key <YOU_+MACHINE_KEY>
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```
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### Register machine using a pre authenticated key
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Generate a key using the command line:
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```shell
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headscale --namespace myfirstnamespace preauthkeys create --reusable --expiration 24h
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```
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This will return a pre-authenticated key that can be used to connect a node to `headscale` during the `tailscale` command:
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```shell
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tailscale up --login-server <YOUR_HEADSCALE_URL> --authkey <YOUR_AUTH_KEY>
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```
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## Running `headscale` in the background with SystemD
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In this section it will be demonstrated how to run `headscale` as a service in the background with [SystemD](https://www.freedesktop.org/wiki/Software/systemd/).
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This should work on most modern Linux distributions.
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1. Create a SystemD service configuration at `/etc/systemd/system/headscale.service` containing:
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```systemd
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[Unit]
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Description=headscale controller
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After=syslog.target
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After=network.target
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[Service]
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Type=simple
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User=headscale
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Group=headscale
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ExecStart=/usr/local/bin/headscale serve
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Restart=always
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RestartSec=5
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# Optional security enhancements
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NoNewPrivileges=yes
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PrivateTmp=yes
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ProtectSystem=strict
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ProtectHome=yes
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ReadWritePaths=/var/lib/headscale /var/run/headscale
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AmbientCapabilities=CAP_NET_BIND_SERVICE
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RuntimeDirectory=headscale
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[Install]
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WantedBy=multi-user.target
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```
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2. In `/etc/headscale/config.yaml`, override the default `headscale` unix socket with a SystemD friendly path:
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```yaml
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unix_socket: /var/run/headscale/headscale.sock
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```
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3. Reload SystemD to load the new configuration file:
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```shell
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systemctl daemon-reload
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```
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4. Enable and start the new `headscale` service:
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```shell
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systemctl enable headscale
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systemctl start headscale
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```
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5. Verify the headscale service:
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```shell
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systemctl status headscale
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```
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Verify `headscale` is available:
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```shell
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curl http://127.0.0.1:8080/metrics
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```
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`headscale` will now run in the background and start at boot.
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