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1 import subprocess
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2
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3 from pyinfra import host
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4 from pyinfra.facts.files import FindInFile
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5 from pyinfra.operations import apt, files, systemd
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6
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7 # other options:
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8 # https://www.reddit.com/r/WireGuard/comments/fkr240/shortest_path_between_peers/
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9 # https://github.com/k4yt3x/wireguard-mesh-configurator
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10 # https://github.com/mawalu/wireguard-private-networking
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11 #
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12
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13
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14 def peer_block(hostname, public_key, allowed_ips, endpoint=None, keepalive=None):
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15 out = f'''\
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16
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17 [Peer]
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18 # {hostname}
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19 PublicKey = {public_key}
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20 AllowedIPs = {allowed_ips}
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21 '''
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22 if endpoint is not None:
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23 out += f'Endpoint = {endpoint}\n'
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24 if keepalive is not None:
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25 out += f'PersistentKeepalive = {keepalive}\n'
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26 return out
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27
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28
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29 for wireguard_interface in ['wg0', 'bogasterisk']:
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30 if wireguard_interface == 'bogasterisk' and host.name != 'prime':
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31 continue
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32
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33 # note- this is specific to the wg0 setup. Other conf files don't use it.
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34 wireguard_ip = host.host_data['wireguard_address']
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35
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36 apt.packages(packages=['wireguard'])
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37 # new pi may fail with 'Unable to access interface: Protocol not supported'. reboot fixes.
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38
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39 priv_key_lines = host.get_fact(FindInFile, path=f'/etc/wireguard/{wireguard_interface}.conf', pattern=r'PrivateKey.*')
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40 if not priv_key_lines:
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41 priv_key = subprocess.check_output(['wg', 'genkey']).strip().decode('ascii')
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42 else:
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43 priv_key = priv_key_lines[0].split(' = ')[1]
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44
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45 pub_key = subprocess.check_output(['wg', 'pubkey'], input=priv_key.encode('ascii')).strip().decode('ascii')
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46 # todo: if this was new, it should be added to a file of pubkeys that peer_block can refer to
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47
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48 files.template(
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49 src=f'templates/wireguard_{wireguard_interface}.conf.j2',
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50 dest=f'/etc/wireguard/{wireguard_interface}.conf',
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51 mode='600',
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52 wireguard_ip=wireguard_ip,
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53 priv_key=priv_key,
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54 peer_block=peer_block,
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55 )
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56 svc = f'wg-quick@{wireguard_interface}.service'
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57 files.link(path=f'/etc/systemd/system/multi-user.target.wants/{svc}', target='/lib/systemd/system/wg-quick@.service')
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58
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59 systemd.service(service=svc, daemon_reload=True, running=True, enabled=True)
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