Mercurial > code > home > repos > infra
annotate dns/dns.py @ 326:5b88b38f2471
huge reorg, reog toplevel functions in preparation of a ui with nice task lists
| author | drewp@bigasterisk.com |
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| date | Mon, 20 Jan 2025 21:55:08 -0800 |
| parents | dns.py@4d1b6a6e65d2 |
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| rev | line source |
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1 from operator import le |
| 318 | 2 import subprocess |
| 241 | 3 from io import StringIO |
| 278 | 4 |
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5 from pyinfra.context import host |
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6 from pyinfra.operations import files, systemd |
| 94 | 7 |
| 282 | 8 |
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9 def dnsmasq_instance( |
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10 net_name, |
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11 house_iface, |
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12 dhcp_range='10.2.0.10,10.2.0.11', |
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13 listen_address='reqd', |
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14 ): |
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15 files.directory(path=f'/opt/dnsmasq/{net_name}') |
| 213 | 16 files.template( |
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17 src='dns/templates/dnsmasq/dnsmasq.conf.j2', |
| 213 | 18 dest=f'/opt/dnsmasq/{net_name}/dnsmasq.conf', |
| 19 net=net_name, | |
| 20 house_iface=house_iface, | |
| 21 dhcp_range=dhcp_range, | |
| 22 listen_address=listen_address, | |
| 23 dhcp_enabled=net_name == '10.2' and host.name == 'pipe', | |
| 24 dns_server=listen_address, | |
| 25 router=listen_address, | |
| 26 ) | |
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27 files.template(src='dns/templates/dnsmasq/hosts.j2', dest=f'/opt/dnsmasq/{net_name}/hosts', net=net_name) |
| 282 | 28 |
| 241 | 29 dhcp_hosts = subprocess.check_output(['python3', '/my/serv/lanscape/src/public/make_dhcp_hosts.py'], encoding='utf8') |
| 30 files.put(src=StringIO(dhcp_hosts), dest=f'/opt/dnsmasq/{net_name}/dhcp_hosts') | |
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31 |
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32 files.template(src='dns/templates/dnsmasq/dnsmasq.service.j2', |
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33 dest=f'/etc/systemd/system/dnsmasq_{net_name}.service', |
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34 net=net_name) |
| 213 | 35 if net_name in ['10.2', '10.2-filtered']: |
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36 systemd.service(service=f'dnsmasq_{net_name}', enabled=True, restarted=True, daemon_reload=True) |
| 94 | 37 |
| 213 | 38 |
| 179 | 39 def standard_host_dns(): |
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40 files.template(src='dns/templates/hosts.j2', dest='/etc/hosts') |
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41 if 'pi' in host.groups: |
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42 files.put(dest='/etc/resolv.conf', src='dns/files/resolv.conf') |
| 278 | 43 else: |
| 44 files.link(path='/etc/resolv.conf', target='/run/systemd/resolve/resolv.conf', force=True) | |
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45 files.template(src='dns/templates/resolved.conf.j2', dest='/etc/systemd/resolved.conf') |
| 278 | 46 systemd.service(service='systemd-resolved.service', running=True, restarted=True) |
| 47 | |
| 94 | 48 |
| 278 | 49 def rpi_net_boot(): |
| 50 files.directory(path='/opt/dnsmasq/tftp') | |
| 282 | 51 |
| 213 | 52 |
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53 def no_default_dnsmasq_instance(): |
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54 # no default instance; i'll add some specific ones below |
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55 systemd.service(service='dnsmasq', enabled=False, running=False) |
| 241 | 56 |
| 318 | 57 |
| 58 def watchLeasesFile(): | |
| 59 """summary: | |
| 60 1. dnsmasq_10.2 leases an address and writes to /opt/dnsmasq/10.2/leases | |
| 61 2. dhcp_graph_watch.path notices that change | |
| 62 3. dhcp_graph_update.service posts /opt/dnsmasq/10.2/leases to dhcp_graph (k8s deploy) | |
| 63 4. dhcp_graph serves the data as rdf | |
| 64 """ | |
| 65 dhcp_graph_url = "http://10.5.0.7:8005" | |
| 66 leases = "/opt/dnsmasq/10.2/leases" | |
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67 files.template( |
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68 src='dns/templates/dhcp_graph_watch.path.j2', |
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69 dest='/etc/systemd/system/dhcp_graph_watch.path', |
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70 leases=leases, |
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71 ) |
| 318 | 72 |
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73 files.template( |
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74 src='dns/templates/dhcp_graph_update.service.j2', |
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75 dest='/etc/systemd/system/dhcp_graph_update.service', |
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76 leases=leases, |
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77 dhcp_graph_url=dhcp_graph_url, |
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78 ) |
| 318 | 79 systemd.service(service='dhcp_graph_watch.path', enabled=True, restarted=True, daemon_reload=True) |
| 80 systemd.service(service='dhcp_graph_update.service', enabled=True, restarted=True, daemon_reload=True) | |
| 81 | |
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82 |
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83 def dnsmasq_on_pipe(): |
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84 if host.name != 'pipe': |
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85 return |
| 278 | 86 rpi_net_boot() |
| 94 | 87 files.directory(path='/opt/dnsmasq') |
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88 dnsmasq_instance( |
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89 '10.2', |
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90 house_iface='eth1', |
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91 dhcp_range='10.2.0.110,10.2.0.240', |
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92 listen_address='10.2.0.3', |
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93 ) |
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94 out = '/opt/dnsmasq/10.2' |
| 318 | 95 # This mtail is for dhcp command counts and errors. |
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96 files.put(src='dns/files/metrics.mtail', dest=f'{out}/metrics.mtail') |
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97 files.put(src='dns/files/run_mtail.sh', dest=f'{out}/run_mtail.sh') |
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98 |
| 318 | 99 watchLeasesFile() |
| 100 | |
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101 files.put(src='dns/files/dnsmasq-mtail.service', dest='/etc/systemd/system/dnsmasq-mtail.service') |
| 241 | 102 systemd.service(service='dnsmasq-mtail', enabled=True, restarted=True, daemon_reload=True) |
| 94 | 103 |
| 213 | 104 # Serve another dns, no dhcp, and include the dynamic-blocking file written by net_routes. |
| 105 dnsmasq_instance( | |
| 106 net_name='10.2-filtered', | |
| 107 house_iface='eth1', | |
| 108 listen_address='10.2.0.4', | |
| 109 ) | |
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110 |
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111 |
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112 operations = [ |
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113 standard_host_dns, |
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114 no_default_dnsmasq_instance, |
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115 dnsmasq_on_pipe, |
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116 ] |