--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/net.py	Wed Nov 10 09:57:02 2021 -0800
@@ -0,0 +1,82 @@
+from pyinfra import host
+from pyinfra.facts.hardware import Ipv4Addrs
+from pyinfra.facts.server import LinuxDistribution
+from pyinfra.operations import apt, files, server, systemd
+
+bang_is_old = True
+is_pi = host.get_fact(LinuxDistribution)['name'] in ['Debian', 'Raspbian GNU/Linux']
+is_wifi = host.name in ['frontdoor', 'living', 'plus']
+ssh_host = host.host_data.get('ssh_hostname', host.name)
+
+if is_wifi:
+    files.put(src="files/wpa_supplicant.conf", dest="/etc/wpa_supplicant/wpa_supplicant.conf")
+
+files.template(src='templates/hosts.j2', dest='/etc/hosts')
+
+if host.name == 'prime':
+    # prime should have gotten this through netplan, but i give up.
+    #
+    # Note the DNS list: this list is tried randomly, not in order, so we could have
+    # some trouble with internal names
+    files.template(src='templates/prime_resolved.conf.j2', dest='/etc/systemd/resolved.conf')
+else:
+    files.template(src='templates/resolved.conf.j2', dest='/etc/systemd/resolved.conf')
+systemd.service(service='systemd-resolved.service', running=True, restarted=True)
+
+files.template(src='templates/resolv.conf.j2', dest='/etc/resolv.conf')
+
+if host.name in ['dash', 'slash', 'garage']:
+    # might need to upgrade pi systemd if there are errors in this part
+    apt.packages(packages=['netplan.io'])
+    files.file(path='/etc/netplan/00-installer-config.yaml', present=False)
+    addrs = host.get_fact(Ipv4Addrs)
+    ipv4Interface = host.host_data['interface']
+    ipv4Address = host.host_data['addr']
+    files.template(src='templates/netplan_dns.yaml.j2',
+                   dest='/etc/netplan/99-ansible-written.yaml',
+                   ipv4Interface=ipv4Interface,
+                   ipv4Address=ipv4Address)
+    server.shell(commands=['netplan apply'])
+
+if host.name not in ['plus']:
+    apt.packages(packages=['network-manager'], present=False)
+
+if host.name == 'bang':
+    files.template(src='templates/bang_interfaces.j2', dest='/etc/network/interfaces', user='root', group='root', mode='644')
+    apt.packages(packages=['iptables', 'openntpd', 'ntpdate'])
+    server.shell(commands=['systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target'], user='root')
+
+    apt.packages(packages=['nfs-kernel-server'])
+    files.template(src='templates/bang_exports.j2', dest='/etc/exports')
+
+    # Now using a HW router for this firewall. No incoming connections.
+    # test connections from the outside:
+    # http://www.t1shopper.com/tools/port-scanner/
+    apt.packages(packages=['ufw'], present=False)
+
+    apt.packages(packages=['dnsmasq'])
+    systemd.service(service='dnsmasq', enabled=False, running=False)
+    files.directory(path='/opt/dnsmasq')
+
+    for net_name in ['10.1', '10.2', '10.5']:
+        files.directory(path=f'/opt/dnsmasq/{net_name}')
+        files.template(src='templates/dnsmasq.conf.j2', dest=f'/opt/dnsmasq/{net_name}/dnsmasq.conf', net=net_name)
+        files.template(src='templates/dhcp_hosts_file.j2', dest=f'/opt/dnsmasq/{net_name}/hosts', net=net_name)
+        files.template(src='templates/dhcp_hosts.j2', dest=f'/opt/dnsmasq/{net_name}/dhcp_hosts', net=net_name)
+
+        files.template(src='templates/dnsmasq.service.j2', dest=f'/etc/systemd/system/dnsmasq_{net_name}.service', net=net_name)
+        systemd.service(service=f'dnsmasq_{net_name}', restarted=True, daemon_reload=True)
+
+if host.name == 'prime':
+    # using digitalocean network config:
+    # https://cloud.digitalocean.com/networking/firewalls/f68899ae-1aac-4469-b379-59ce2bbc988f/droplets?i=7c5072
+    apt.packages(packages=['ufw'], present=False)
+
+    files.line(name='shorter systemctl log window, for disk space',
+               path='/etc/systemd/journald.conf',
+               line='MaxFileSec',
+               replace="MaxFileSec=7day")
+
+    for port in [80, 443]:
+        files.template(src="webforward.service.j2", dest=f"/etc/systemd/system/web_forward_{port}.service", port=port)
+        systemd.service(service=f'web_forward_{port}', enabled=True, restarted=True)