Add role for headscale

roles/headscale/README.md

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+# headscale
+
+Install and configure [headscale](https://github.com/juanfont/headscale).
+
+## Role variables
+
+* `headscale_become` - Default: true. Enable/disable the Ansible become
+  functionality.
+* `headscale_become_user` - Default: root. When using become functionality for
+  privilege escalation, this is the user with desired privileges you become.
+* `headscale_dir` - Default: /srv/headscale. Directory where headscale will be
+  installed.

roles/headscale/defaults/main.yml

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+---
+headscale_become: true
+headscale_become_user: root
+
+headscale_version: v0.16.4
+headscale_binary: headscale_0.16.4_linux_amd64
+# yamllint disable-line rule:line-length
+headscale_tarball_sha256: 689264ad6cc0f49a2ca6da1c0bb9cb1fa63020f65ff76d66de3cb5b799485da2
+
+# yamllint disable-line rule:line-length
+headscale_download_url: "https://github.com/juanfont/headscale/releases/download/{{ headscale_version }}/{{ headscale_binary }}"
+
+headscale_dir: /srv/headscale
+headscale_server_url: http://127.0.0.1:8080
+headscale_listen_addr: 0.0.0.0:8080

roles/headscale/handlers/main.yml

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+---
+- name: systemctl daemon-reload
+  systemd:
+    daemon_reload: true
+  become: "{{ headscale_become }}"
+  become_user: "{{ headscale_become_user }}"
+
+- name: systemctl restart headscale
+  systemd:
+    name: headscale.service
+    state: restarted
+  become: "{{ headscale_become }}"
+  become_user: "{{ headscale_become_user }}"

roles/headscale/tasks/main.yml

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+---
+- block:
+
+    - name: ensure headscale group exits
+      ansible.builtin.group:
+        name: headscale
+        system: true
+
+    - name: ensure headscale user exists and has restrictive settings
+      ansible.builtin.user:
+        name: headscale
+        groups: headscale
+        password: "*"
+        home: /var/lib/headscale
+        system: true
+        shell: /usr/sbin/nologin
+
+    - name: ensure that the directory where we deploy headscale exists
+      ansible.builtin.file:
+        path: "{{ headscale_dir }}"
+        state: directory
+        owner: headscale
+        group: headscale
+        mode: "0750"
+
+    - name: download headscale in {{ headscale_dir }}
+      ansible.builtin.get_url:
+        url: "{{ headscale_download_url }}"
+        dest: "{{ headscale_dir }}"
+        checksum: "sha256:{{ headscale_tarball_sha256 }}"
+
+    - name: rename headscale binary in {{ headscale_dir }}
+      ansible.builtin.copy:
+        src: "{{ headscale_dir }}/{{ headscale_binary }}"
+        dest: "{{ headscale_dir }}/headscale"
+        remote_src: true
+        owner: headscale
+        group: headscale
+        mode: "0750"
+
+    - name: remove original downloaded headscale binary
+      ansible.builtin.file:
+        path: "{{ headscale_dir }}/{{ headscale_binary }}"
+        state: absent
+
+    - name: ensure that the directory for headscale configuration exists
+      ansible.builtin.file:
+        path: /etc/headscale
+        state: directory
+        owner: headscale
+        group: headscale
+        mode: "0750"
+
+    - name: ensure that the headscale SQLite database exists
+      ansible.builtin.file:
+        path: /var/lib/headscale/db.sqlite
+        state: touch
+        owner: headscale
+        group: headscale
+        mode: "0750"
+
+    - name: set headscale config file
+      ansible.builtin.template:
+        src: templates/etc/headscale/config.yaml.j2
+        dest: /etc/headscale/config.yaml
+        owner: headscale
+        group: headscale
+        mode: 0640
+      notify: systemctl restart headscale
+
+    - name: install headscale systemd unit file
+      ansible.builtin.template:
+        src: etc/systemd/system/headscale.service.j2
+        dest: /etc/systemd/system/headscale.service
+      notify:
+        - systemctl daemon-reload
+
+    - name: systemctl enable headscale
+      ansible.builtin.systemd:
+        name: headscale
+        enabled: true
+
+    - name: ensure headscale is running
+      ansible.builtin.systemd:
+        name: headscale
+        state: started
+
+  become: "{{ headscale_become }}"
+  become_user: "{{ headscale_become_user }}"

roles/headscale/templates/etc/headscale/config.yaml.j2

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+---
+# headscale will look for a configuration file named `config.yaml` (or `config.json`) in the following order:
+#
+# - `/etc/headscale`
+# - `~/.headscale`
+# - current working directory
+
+# The url clients will connect to.
+# Typically this will be a domain like:
+#
+# https://myheadscale.example.com:443
+#
+server_url: {{ headscale_server_url }}
+
+# Address to listen to / bind to on the server
+#
+listen_addr: {{ headscale_listen_addr }}
+
+# Address to listen to /metrics, you may want
+# to keep this endpoint private to your internal
+# network
+#
+metrics_listen_addr: 127.0.0.1:9090
+
+# Address to listen for gRPC.
+# gRPC is used for controlling a headscale server
+# remotely with the CLI
+# Note: Remote access _only_ works if you have
+# valid certificates.
+grpc_listen_addr: 0.0.0.0:50443
+
+# Allow the gRPC admin interface to run in INSECURE
+# mode. This is not recommended as the traffic will
+# be unencrypted. Only enable if you know what you
+# are doing.
+grpc_allow_insecure: false
+
+# Private key used encrypt the traffic between headscale
+# and Tailscale clients.
+# The private key file which will be
+# autogenerated if it's missing
+private_key_path: /var/lib/headscale/private.key
+
+# The Noise section includes specific configuration for the
+# TS2021 Noise procotol
+noise:
+  # The Noise private key is used to encrypt the
+  # traffic between headscale and Tailscale clients when
+  # using the new Noise-based protocol. It must be different
+  # from the legacy private key.
+  private_key_path: /var/lib/headscale/noise_private.key
+
+# List of IP prefixes to allocate tailaddresses from.
+# Each prefix consists of either an IPv4 or IPv6 address,
+# and the associated prefix length, delimited by a slash.
+ip_prefixes:
+  - fd7a:115c:a1e0::/48
+  - 100.64.0.0/10
+
+# DERP is a relay system that Tailscale uses when a direct
+# connection cannot be established.
+# https://tailscale.com/blog/how-tailscale-works/#encrypted-tcp-relays-derp
+#
+# headscale needs a list of DERP servers that can be presented
+# to the clients.
+derp:
+  server:
+    # If enabled, runs the embedded DERP server and merges it into the rest of the DERP config
+    # The Headscale server_url defined above MUST be using https, DERP requires TLS to be in place
+    enabled: false
+
+    # Region ID to use for the embedded DERP server.
+    # The local DERP prevails if the region ID collides with other region ID coming from
+    # the regular DERP config.
+    region_id: 999
+
+    # Region code and name are displayed in the Tailscale UI to identify a DERP region
+    region_code: "headscale"
+    region_name: "Headscale Embedded DERP"
+
+    # Listens in UDP at the configured address for STUN connections to help on NAT traversal.
+    # When the embedded DERP server is enabled stun_listen_addr MUST be defined.
+    #
+    # For more details on how this works, check this great article: https://tailscale.com/blog/how-tailscale-works/
+    stun_listen_addr: "0.0.0.0:3478"
+
+  # List of externally available DERP maps encoded in JSON
+  urls:
+    - https://controlplane.tailscale.com/derpmap/default
+
+  # Locally available DERP map files encoded in YAML
+  #
+  # This option is mostly interesting for people hosting
+  # their own DERP servers:
+  # https://tailscale.com/kb/1118/custom-derp-servers/
+  #
+  # paths:
+  #   - /etc/headscale/derp-example.yaml
+  paths: []
+
+  # If enabled, a worker will be set up to periodically
+  # refresh the given sources and update the derpmap
+  # will be set up.
+  auto_update_enabled: true
+
+  # How often should we check for DERP updates?
+  update_frequency: 24h
+
+# Disables the automatic check for headscale updates on startup
+disable_check_updates: false
+
+# Time before an inactive ephemeral node is deleted?
+ephemeral_node_inactivity_timeout: 30m
+
+# Period to check for node updates in the tailnet. A value too low will severily affect
+# CPU consumption of Headscale. A value too high (over 60s) will cause problems
+# to the nodes, as they won't get updates or keep alive messages in time.
+# In case of doubts, do not touch the default 10s.
+node_update_check_interval: 10s
+
+# SQLite config
+db_type: sqlite3
+db_path: /var/lib/headscale/db.sqlite
+
+# # Postgres config
+# If using a Unix socket to connect to Postgres, set the socket path in the 'host' field and leave 'port' blank.
+# db_type: postgres
+# db_host: localhost
+# db_port: 5432
+# db_name: headscale
+# db_user: foo
+# db_pass: bar
+# db_ssl: false
+
+### TLS configuration
+#
+## Let's encrypt / ACME
+#
+# headscale supports automatically requesting and setting up
+# TLS for a domain with Let's Encrypt.
+#
+# URL to ACME directory
+acme_url: https://acme-v02.api.letsencrypt.org/directory
+
+# Email to register with ACME provider
+acme_email: ""
+
+# Domain name to request a TLS certificate for:
+tls_letsencrypt_hostname: ""
+
+# Client (Tailscale/Browser) authentication mode (mTLS)
+# Acceptable values:
+# - disabled: client authentication disabled
+# - relaxed: client certificate is required but not verified
+# - enforced: client certificate is required and verified
+tls_client_auth_mode: relaxed
+
+# Path to store certificates and metadata needed by
+# letsencrypt
+tls_letsencrypt_cache_dir: /var/lib/headscale/cache
+
+# Type of ACME challenge to use, currently supported types:
+# HTTP-01 or TLS-ALPN-01
+# See [docs/tls.md](docs/tls.md) for more information
+tls_letsencrypt_challenge_type: HTTP-01
+# When HTTP-01 challenge is chosen, letsencrypt must set up a
+# verification endpoint, and it will be listning on:
+# :http = port 80
+tls_letsencrypt_listen: ":http"
+
+## Use already defined certificates:
+tls_cert_path: ""
+tls_key_path: ""
+
+log_level: info
+
+# Path to a file containg ACL policies.
+# ACLs can be defined as YAML or HUJSON.
+# https://tailscale.com/kb/1018/acls/
+acl_policy_path: ""
+
+## DNS
+#
+# headscale supports Tailscale's DNS configuration and MagicDNS.
+# Please have a look to their KB to better understand the concepts:
+#
+# - https://tailscale.com/kb/1054/dns/
+# - https://tailscale.com/kb/1081/magicdns/
+# - https://tailscale.com/blog/2021-09-private-dns-with-magicdns/
+#
+dns_config:
+  # List of DNS servers to expose to clients.
+  nameservers:
+    - 1.1.1.1
+
+  # Split DNS (see https://tailscale.com/kb/1054/dns/),
+  # list of search domains and the DNS to query for each one.
+  #
+  # restricted_nameservers:
+  #   foo.bar.com:
+  #     - 1.1.1.1
+  #   darp.headscale.net:
+  #     - 1.1.1.1
+  #     - 8.8.8.8
+
+  # Search domains to inject.
+  domains: []
+
+  # Whether to use [MagicDNS](https://tailscale.com/kb/1081/magicdns/).
+  # Only works if there is at least a nameserver defined.
+  magic_dns: true
+
+  # Defines the base domain to create the hostnames for MagicDNS.
+  # `base_domain` must be a FQDNs, without the trailing dot.
+  # The FQDN of the hosts will be
+  # `hostname.namespace.base_domain` (e.g., _myhost.mynamespace.example.com_).
+  base_domain: example.com
+
+# Unix socket used for the CLI to connect without authentication
+# Note: for local development, you probably want to change this to:
+# unix_socket: ./headscale.sock
+unix_socket: /var/run/headscale/headscale.sock
+unix_socket_permission: "0770"
+#
+# headscale supports experimental OpenID connect support,
+# it is still being tested and might have some bugs, please
+# help us test it.
+# OpenID Connect
+# oidc:
+#   issuer: "https://your-oidc.issuer.com/path"
+#   client_id: "your-oidc-client-id"
+#   client_secret: "your-oidc-client-secret"
+#
+#   Customize the scopes used in the OIDC flow, defaults to "openid", "profile" and "email" and add custom query
+#   parameters to the Authorize Endpoint request. Scopes default to "openid", "profile" and "email".
+#
+#   scope: ["openid", "profile", "email", "custom"]
+#   extra_params:
+#     domain_hint: example.com
+#
+#   List allowed principal domains and/or users. If an authenticated user's domain is not in this list, the
+#   authentication request will be rejected.
+#
+#   allowed_domains:
+#     - example.com
+#   allowed_users:
+#     - alice@example.com
+#
+#   If `strip_email_domain` is set to `true`, the domain part of the username email address will be removed.
+#   This will transform `first-name.last-name@example.com` to the namespace `first-name.last-name`
+#   If `strip_email_domain` is set to `false` the domain part will NOT be removed resulting to the following
+#   namespace: `first-name.last-name.example.com`
+#
+#   strip_email_domain: true
+
+# Logtail configuration
+# Logtail is Tailscales logging and auditing infrastructure, it allows the control panel
+# to instruct tailscale nodes to log their activity to a remote server.
+logtail:
+  # Enable logtail for this headscales clients.
+  # As there is currently no support for overriding the log server in headscale, this is
+  # disabled by default. Enabling this will make your clients send logs to Tailscale Inc.
+  enabled: false
+
+# Enabling this option makes devices prefer a random port for WireGuard traffic over the
+# default static port 41641. This option is intended as a workaround for some buggy
+# firewall devices. See https://tailscale.com/kb/1181/firewalls/ for more information.
+randomize_client_port: false

roles/headscale/templates/etc/systemd/system/headscale.service.j2

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+# Managed by Ansible
+[Unit]
+Description=headscale controller
+After=syslog.target
+After=network.target
+
+[Service]
+Type=simple
+User=headscale
+Group=headscale
+ExecStart={{ headscale_dir }}/headscale serve
+Restart=always
+RestartSec=5
+
+# Optional security enhancements
+NoNewPrivileges=yes
+PrivateTmp=yes
+ProtectSystem=strict
+ProtectHome=yes
+ReadWritePaths=/var/lib/headscale /var/run/headscale
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+RuntimeDirectory=headscale
+
+[Install]
+WantedBy=multi-user.target

tests/test.yml

@@ -74,10 +74,11 @@
     # - ../roles/iptables
     # - ../roles/sshd
     # - ../roles/fail2ban
-    - ../roles/snake_oil_cert
+    # - ../roles/snake_oil_cert
     # - ../roles/users
     # - ../roles/dehydrated
-    - ../roles/nginx
+    # - ../roles/nginx
+    - ../roles/headscale
     # - ../roles/admin
     # - ../roles/docker
     # - ../roles/mailserver