Mercurial > code > home > repos > infra
annotate dns.py @ 278:4e424a144183
for netboot pi
| author | drewp@bigasterisk.com |
|---|---|
| date | Sat, 30 Mar 2024 00:15:46 -0700 |
| parents | 075ceead3673 |
| children | 5c5c314051c5 |
| 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 |
| 213 | 10 def dnsmasq_instance(net_name, |
| 11 house_iface, | |
| 12 dhcp_range='10.2.0.10,10.2.0.11', | |
| 13 listen_address='reqd', | |
| 14 dhcp_hosts_filename='/dev/null'): | |
|
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15 files.directory(path=f'/opt/dnsmasq/{net_name}') |
| 213 | 16 files.template( |
| 17 src='templates/dnsmasq/dnsmasq.conf.j2', | |
| 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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parents:
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27 files.template(src='templates/dnsmasq/hosts.j2', dest=f'/opt/dnsmasq/{net_name}/hosts', net=net_name) |
| 241 | 28 |
| 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='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(): |
| 40 files.template(src='templates/hosts.j2', dest='/etc/hosts') | |
| 278 | 41 if is_pi: |
| 42 files.put(dest='/etc/resolv.conf', src=StringIO(''' | |
| 43 # written by pyinfra | |
| 44 nameserver 10.2.0.3 | |
| 45 search bigasterisk.com | |
| 46 ''')) | |
| 47 else: | |
| 48 files.link(path='/etc/resolv.conf', target='/run/systemd/resolve/resolv.conf', force=True) | |
| 49 files.template(src='templates/resolved.conf.j2', dest='/etc/systemd/resolved.conf') | |
| 50 systemd.service(service='systemd-resolved.service', running=True, restarted=True) | |
| 51 | |
| 94 | 52 |
| 278 | 53 def rpi_net_boot(): |
| 54 files.directory(path='/opt/dnsmasq/tftp') | |
| 55 for pi_serial, _ in pi_serial_hostname: | |
| 56 files.directory(path=f'/opt/dnsmasq/tftp/{pi_serial}') | |
| 57 # then we transfer from pi to here | |
| 58 | |
| 59 def rpi_iscsi_volumes(): | |
| 60 iscsi_dir = '/d2/rpi-iscsi' | |
| 61 for _, pi_hostname in pi_serial_hostname: | |
| 62 out= f'{iscsi_dir}/{pi_hostname}.disk' | |
| 63 files.directory(path=iscsi_dir) | |
| 64 server.shell(f'dd if=/dev/zero of={out} count=0 bs=1 seek=4G conv=excl || true') | |
| 65 files.put(dest=f"/etc/tgt/conf.d/{pi_hostname}.conf", src=StringIO(f""" | |
| 66 <target iqn.2024-03.com.bigasterisk:{pi_hostname}.target> | |
| 67 backing-store {out} | |
| 68 initiator-name iqn.2024-03.com.bigasterisk:{pi_hostname}.initiator | |
| 69 </target> | |
| 70 """)) | |
| 71 systemd.service(service='tgt.service', running=True, restarted=True) | |
| 72 | |
| 213 | 73 |
| 179 | 74 standard_host_dns() |
| 94 | 75 |
| 241 | 76 # no default instance; i'll add some specific ones below |
| 77 systemd.service(service='dnsmasq', enabled=False, running=False) | |
| 78 | |
|
34
d4fb38f13c79
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drewp@bigasterisk.com
parents:
diff
changeset
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79 if host.name == 'bang': |
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d4fb38f13c79
refactor dns and some other non-net setup
drewp@bigasterisk.com
parents:
diff
changeset
|
80 files.directory(path='/opt/dnsmasq') |
|
d4fb38f13c79
refactor dns and some other non-net setup
drewp@bigasterisk.com
parents:
diff
changeset
|
81 |
| 213 | 82 dnsmasq_instance('10.5', house_iface='unused', dhcp_range='unused', |
| 83 listen_address='unused') # only works after wireguard is up | |
| 278 | 84 elif host.name == 'ditto': |
| 85 rpi_iscsi_volumes() # move out of this file- it's not dns | |
| 94 | 86 elif host.name == 'pipe': |
| 278 | 87 rpi_net_boot() |
| 94 | 88 files.directory(path='/opt/dnsmasq') |
| 116 | 89 dnsmasq_instance('10.2', |
| 90 house_iface='eth1', | |
| 241 | 91 dhcp_range='10.2.0.110,10.2.0.199', |
| 213 | 92 listen_address='10.2.0.3', |
| 116 | 93 dhcp_hosts_filename='templates/dnsmasq/dhcp_hosts.j2') |
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94 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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diff
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95 # 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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96 files.template(src='templates/dnsmasq/metrics.mtail.j2', dest=f'{out}/metrics.mtail') |
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51a471fa4d29
metrics on dnsmasq log errors and DHCP commands
drewp@bigasterisk.com
parents:
116
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97 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
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changeset
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98 |
| 241 | 99 files.template(src='templates/dnsmasq/dnsmasq-mtail.service.j2', dest='/etc/systemd/system/dnsmasq-mtail.service') |
| 100 systemd.service(service='dnsmasq-mtail', enabled=True, restarted=True, daemon_reload=True) | |
| 94 | 101 |
| 213 | 102 # Serve another dns, no dhcp, and include the dynamic-blocking file written by net_routes. |
| 103 dnsmasq_instance( | |
| 104 net_name='10.2-filtered', | |
| 105 house_iface='eth1', | |
| 106 listen_address='10.2.0.4', | |
| 107 ) |