import ./make-test-python.nix ({ pkgs, lib, ...} :
let
common = {
networking.firewall.enable = false;
networking.useDHCP = false;
};
exampleZone = pkgs.writeTextDir "example.com.zone" ''
@ SOA ns.example.com. noc.example.com. 2019031301 86400 7200 3600000 172800
@ NS ns1
@ NS ns2
ns1 A 192.168.0.1
ns1 AAAA fd00::1
ns2 A 192.168.0.2
ns2 AAAA fd00::2
www A 192.0.2.1
www AAAA 2001:DB8::1
sub NS ns.example.com.
'';
delegatedZone = pkgs.writeTextDir "sub.example.com.zone" ''
@ SOA ns.example.com. noc.example.com. 2019031301 86400 7200 3600000 172800
@ NS ns1.example.com.
@ NS ns2.example.com.
@ A 192.0.2.2
@ AAAA 2001:DB8::2
'';
knotZonesEnv = pkgs.buildEnv {
name = "knot-zones";
paths = [ exampleZone delegatedZone ];
};
# DO NOT USE pkgs.writeText IN PRODUCTION. This put secrets in the nix store!
tsigFile = pkgs.writeText "tsig.conf" ''
key:
- id: slave_key
algorithm: hmac-sha256
secret: zOYgOgnzx3TGe5J5I/0kxd7gTcxXhLYMEq3Ek3fY37s=
'';
in {
name = "knot";
meta = with pkgs.lib.maintainers; {
maintainers = [ hexa ];
};
nodes = {
master = { lib, ... }: {
imports = [ common ];
# trigger sched_setaffinity syscall
virtualisation.cores = 2;
networking.interfaces.eth1 = {
ipv4.addresses = lib.mkForce [
{ address = "192.168.0.1"; prefixLength = 24; }
];
ipv6.addresses = lib.mkForce [
{ address = "fd00::1"; prefixLength = 64; }
];
};
services.knot.enable = true;
services.knot.extraArgs = [ "-v" ];
services.knot.keyFiles = [ tsigFile ];
services.knot.extraConfig = ''
server:
listen: 0.0.0.0@53
listen: ::@53
acl:
- id: slave_acl
address: 192.168.0.2
key: slave_key
action: transfer
remote:
- id: slave
address: 192.168.0.2@53
template:
- id: default
storage: ${knotZonesEnv}
notify: [slave]
acl: [slave_acl]
dnssec-signing: on
# Input-only zone files
# https://www.knot-dns.cz/docs/2.8/html/operation.html#example-3
# prevents modification of the zonefiles, since the zonefiles are immutable
zonefile-sync: -1
zonefile-load: difference
journal-content: changes
# move databases below the state directory, because they need to be writable
journal-db: /var/lib/knot/journal
kasp-db: /var/lib/knot/kasp
timer-db: /var/lib/knot/timer
zone:
- domain: example.com
file: example.com.zone
- domain: sub.example.com
file: sub.example.com.zone
log:
- target: syslog
any: info
'';
};
slave = { lib, ... }: {
imports = [ common ];
networking.interfaces.eth1 = {
ipv4.addresses = lib.mkForce [
{ address = "192.168.0.2"; prefixLength = 24; }
];
ipv6.addresses = lib.mkForce [
{ address = "fd00::2"; prefixLength = 64; }
];
};
services.knot.enable = true;
services.knot.keyFiles = [ tsigFile ];
services.knot.extraArgs = [ "-v" ];
services.knot.extraConfig = ''
server:
listen: 0.0.0.0@53
listen: ::@53
acl:
- id: notify_from_master
address: 192.168.0.1
action: notify
remote:
- id: master
address: 192.168.0.1@53
key: slave_key
template:
- id: default
master: master
acl: [notify_from_master]
# zonefileless setup
# https://www.knot-dns.cz/docs/2.8/html/operation.html#example-2
zonefile-sync: -1
zonefile-load: none
journal-content: all
# move databases below the state directory, because they need to be writable
journal-db: /var/lib/knot/journal
kasp-db: /var/lib/knot/kasp
timer-db: /var/lib/knot/timer
zone:
- domain: example.com
file: example.com.zone
- domain: sub.example.com
file: sub.example.com.zone
log:
- target: syslog
any: info
'';
};
client = { lib, nodes, ... }: {
imports = [ common ];
networking.interfaces.eth1 = {
ipv4.addresses = [
{ address = "192.168.0.3"; prefixLength = 24; }
];
ipv6.addresses = [
{ address = "fd00::3"; prefixLength = 64; }
];
};
environment.systemPackages = [ pkgs.knot-dns ];
};
};
testScript = { nodes, ... }: let
master4 = (lib.head nodes.master.config.networking.interfaces.eth1.ipv4.addresses).address;
master6 = (lib.head nodes.master.config.networking.interfaces.eth1.ipv6.addresses).address;
slave4 = (lib.head nodes.slave.config.networking.interfaces.eth1.ipv4.addresses).address;
slave6 = (lib.head nodes.slave.config.networking.interfaces.eth1.ipv6.addresses).address;
in ''
import re
start_all()
client.wait_for_unit("network.target")
master.wait_for_unit("knot.service")
slave.wait_for_unit("knot.service")
def test(host, query_type, query, pattern):
out = client.succeed(f"khost -t {query_type} {query} {host}").strip()
client.log(f"{host} replied with: {out}")
assert re.search(pattern, out), f'Did not match "{pattern}"'
for host in ("${master4}", "${master6}", "${slave4}", "${slave6}"):
with subtest(f"Interrogate {host}"):
test(host, "SOA", "example.com", r"start of authority.*noc\.example\.com\.")
test(host, "A", "example.com", r"has no [^ ]+ record")
test(host, "AAAA", "example.com", r"has no [^ ]+ record")
test(host, "A", "www.example.com", r"address 192.0.2.1$")
test(host, "AAAA", "www.example.com", r"address 2001:db8::1$")
test(host, "NS", "sub.example.com", r"nameserver is ns\d\.example\.com.$")
test(host, "A", "sub.example.com", r"address 192.0.2.2$")
test(host, "AAAA", "sub.example.com", r"address 2001:db8::2$")
test(host, "RRSIG", "www.example.com", r"RR set signature is")
test(host, "DNSKEY", "example.com", r"DNSSEC key is")
master.log(master.succeed("systemd-analyze security knot.service | grep -v '✓'"))
'';
})