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annotate dns.py @ 284:a46eb2a77df7
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| author | drewp@bigasterisk.com |
|---|---|
| date | Mon, 15 Apr 2024 02:28:52 -0700 |
| parents | e10ee3ddadcf |
| children | 3af02e24eaf9 |
| rev | line source |
|---|---|
| 241 | 1 from io import StringIO |
| 2 import subprocess | |
| 278 | 3 |
|
34
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refactor dns and some other non-net setup
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4 from pyinfra import host |
| 278 | 5 from pyinfra.operations import files, systemd, server |
| 6 from pyinfra.facts.server import Arch, LinuxDistribution | |
| 38 | 7 |
| 278 | 8 is_pi = host.get_fact(LinuxDistribution)['name'] in ['Debian', 'Raspbian GNU/Linux'] |
| 94 | 9 |
| 282 | 10 |
| 213 | 11 def dnsmasq_instance(net_name, |
| 12 house_iface, | |
| 13 dhcp_range='10.2.0.10,10.2.0.11', | |
| 14 listen_address='reqd', | |
| 15 dhcp_hosts_filename='/dev/null'): | |
|
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16 files.directory(path=f'/opt/dnsmasq/{net_name}') |
| 213 | 17 files.template( |
| 18 src='templates/dnsmasq/dnsmasq.conf.j2', | |
| 19 dest=f'/opt/dnsmasq/{net_name}/dnsmasq.conf', | |
| 20 net=net_name, | |
| 21 house_iface=house_iface, | |
| 22 dhcp_range=dhcp_range, | |
| 23 listen_address=listen_address, | |
| 24 dhcp_enabled=net_name == '10.2' and host.name == 'pipe', | |
| 25 dns_server=listen_address, | |
| 26 router=listen_address, | |
| 27 ) | |
|
88
dae714e8f620
reactor and temporarily cut dep on lanscape
drewp@bigasterisk.com
parents:
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diff
changeset
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28 files.template(src='templates/dnsmasq/hosts.j2', dest=f'/opt/dnsmasq/{net_name}/hosts', net=net_name) |
| 282 | 29 |
| 241 | 30 dhcp_hosts = subprocess.check_output(['python3', '/my/serv/lanscape/src/public/make_dhcp_hosts.py'], encoding='utf8') |
| 31 files.put(src=StringIO(dhcp_hosts), dest=f'/opt/dnsmasq/{net_name}/dhcp_hosts') | |
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parents:
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32 |
|
dae714e8f620
reactor and temporarily cut dep on lanscape
drewp@bigasterisk.com
parents:
81
diff
changeset
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33 files.template(src='templates/dnsmasq/dnsmasq.service.j2', |
|
dae714e8f620
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parents:
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34 dest=f'/etc/systemd/system/dnsmasq_{net_name}.service', |
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dae714e8f620
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35 net=net_name) |
| 213 | 36 if net_name in ['10.2', '10.2-filtered']: |
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parents:
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37 systemd.service(service=f'dnsmasq_{net_name}', enabled=True, restarted=True, daemon_reload=True) |
| 94 | 38 |
| 213 | 39 |
| 179 | 40 def standard_host_dns(): |
| 41 files.template(src='templates/hosts.j2', dest='/etc/hosts') | |
| 278 | 42 if is_pi: |
| 282 | 43 files.put(dest='/etc/resolv.conf', |
| 44 src=StringIO(''' | |
| 278 | 45 # written by pyinfra |
| 46 nameserver 10.2.0.3 | |
| 47 search bigasterisk.com | |
| 48 ''')) | |
| 49 else: | |
| 50 files.link(path='/etc/resolv.conf', target='/run/systemd/resolve/resolv.conf', force=True) | |
| 51 files.template(src='templates/resolved.conf.j2', dest='/etc/systemd/resolved.conf') | |
| 52 systemd.service(service='systemd-resolved.service', running=True, restarted=True) | |
| 53 | |
| 94 | 54 |
| 282 | 55 pi_serial_hostname = [ |
| 56 ] | |
| 57 | |
| 58 | |
| 278 | 59 def rpi_net_boot(): |
| 60 files.directory(path='/opt/dnsmasq/tftp') | |
| 61 for pi_serial, _ in pi_serial_hostname: | |
| 62 files.directory(path=f'/opt/dnsmasq/tftp/{pi_serial}') | |
| 63 # then we transfer from pi to here | |
| 64 | |
| 282 | 65 |
| 278 | 66 def rpi_iscsi_volumes(): |
| 67 iscsi_dir = '/d2/rpi-iscsi' | |
| 68 for _, pi_hostname in pi_serial_hostname: | |
| 282 | 69 out = f'{iscsi_dir}/{pi_hostname}.disk' |
| 278 | 70 files.directory(path=iscsi_dir) |
| 280 | 71 server.shell(f'dd if=/dev/zero of={out} count=0 bs=1 seek=5G conv=excl || true') |
| 282 | 72 files.put(dest=f"/etc/tgt/conf.d/{pi_hostname}.conf", |
| 73 src=StringIO(f""" | |
| 278 | 74 <target iqn.2024-03.com.bigasterisk:{pi_hostname}.target> |
| 75 backing-store {out} | |
| 76 initiator-name iqn.2024-03.com.bigasterisk:{pi_hostname}.initiator | |
| 77 </target> | |
| 78 """)) | |
| 282 | 79 # restarting is disruptive to connected pis, and they might need to be |
| 80 # visited: | |
| 81 #systemd.service(service='tgt.service', running=True, restarted=True) | |
| 82 | |
| 213 | 83 |
| 179 | 84 standard_host_dns() |
| 94 | 85 |
| 241 | 86 # no default instance; i'll add some specific ones below |
| 87 systemd.service(service='dnsmasq', enabled=False, running=False) | |
| 88 | |
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34
d4fb38f13c79
refactor dns and some other non-net setup
drewp@bigasterisk.com
parents:
diff
changeset
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89 if host.name == 'bang': |
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d4fb38f13c79
refactor dns and some other non-net setup
drewp@bigasterisk.com
parents:
diff
changeset
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90 files.directory(path='/opt/dnsmasq') |
|
d4fb38f13c79
refactor dns and some other non-net setup
drewp@bigasterisk.com
parents:
diff
changeset
|
91 |
| 213 | 92 dnsmasq_instance('10.5', house_iface='unused', dhcp_range='unused', |
| 93 listen_address='unused') # only works after wireguard is up | |
| 278 | 94 elif host.name == 'ditto': |
| 282 | 95 rpi_iscsi_volumes() # move out of this file- it's not dns |
| 94 | 96 elif host.name == 'pipe': |
| 278 | 97 rpi_net_boot() |
| 94 | 98 files.directory(path='/opt/dnsmasq') |
| 116 | 99 dnsmasq_instance('10.2', |
| 100 house_iface='eth1', | |
| 241 | 101 dhcp_range='10.2.0.110,10.2.0.199', |
| 213 | 102 listen_address='10.2.0.3', |
| 116 | 103 dhcp_hosts_filename='templates/dnsmasq/dhcp_hosts.j2') |
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metrics on dnsmasq log errors and DHCP commands
drewp@bigasterisk.com
parents:
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104 out = '/opt/dnsmasq/10.2' |
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51a471fa4d29
metrics on dnsmasq log errors and DHCP commands
drewp@bigasterisk.com
parents:
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105 # This mtail is for dhcp command counts and errors. Another monitor in lanscape/ reads the leases file. |
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51a471fa4d29
metrics on dnsmasq log errors and DHCP commands
drewp@bigasterisk.com
parents:
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106 files.template(src='templates/dnsmasq/metrics.mtail.j2', dest=f'{out}/metrics.mtail') |
|
51a471fa4d29
metrics on dnsmasq log errors and DHCP commands
drewp@bigasterisk.com
parents:
116
diff
changeset
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107 files.template(src='templates/dnsmasq/run_mtail.sh', dest=f'{out}/run_mtail.sh') |
|
51a471fa4d29
metrics on dnsmasq log errors and DHCP commands
drewp@bigasterisk.com
parents:
116
diff
changeset
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108 |
| 241 | 109 files.template(src='templates/dnsmasq/dnsmasq-mtail.service.j2', dest='/etc/systemd/system/dnsmasq-mtail.service') |
| 110 systemd.service(service='dnsmasq-mtail', enabled=True, restarted=True, daemon_reload=True) | |
| 94 | 111 |
| 213 | 112 # Serve another dns, no dhcp, and include the dynamic-blocking file written by net_routes. |
| 113 dnsmasq_instance( | |
| 114 net_name='10.2-filtered', | |
| 115 house_iface='eth1', | |
| 116 listen_address='10.2.0.4', | |
| 117 ) |