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|
{
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: xfr_key
algorithm: hmac-sha256
secret: zOYgOgnzx3TGe5J5I/0kxd7gTcxXhLYMEq3Ek3fY37s=
'';
in
{
name = "knot";
meta = with pkgs.lib.maintainers; {
maintainers = [ hexa ];
};
nodes = {
primary =
{ 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.settings = {
server = {
listen = [
"0.0.0.0@53"
"::@53"
];
listen-quic = [
"0.0.0.0@853"
"::@853"
];
automatic-acl = true;
};
acl.secondary_acl = {
address = "192.168.0.2";
key = "xfr_key";
action = "transfer";
};
remote.secondary.address = "192.168.0.2@53";
template.default = {
storage = knotZonesEnv;
notify = [ "secondary" ];
acl = [ "secondary_acl" ];
dnssec-signing = true;
# 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";
};
zone = {
"example.com".file = "example.com.zone";
"sub.example.com".file = "sub.example.com.zone";
};
log.syslog.any = "info";
};
};
secondary =
{ 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.settings = {
server = {
automatic-acl = true;
};
xdp = {
listen = [
"eth1"
];
tcp = true;
};
remote.primary = {
address = "192.168.0.1@53";
key = "xfr_key";
};
remote.primary-quic = {
address = "192.168.0.1@853";
key = "xfr_key";
quic = true;
};
template.default = {
# zonefileless setup
# https://www.knot-dns.cz/docs/2.8/html/operation.html#example-2
zonefile-sync = "-1";
zonefile-load = "none";
journal-content = "all";
};
zone = {
"example.com" = {
master = "primary";
file = "example.com.zone";
};
"sub.example.com" = {
master = "primary-quic";
file = "sub.example.com.zone";
};
};
log.syslog.any = "debug";
};
};
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
primary4 = (lib.head nodes.primary.networking.interfaces.eth1.ipv4.addresses).address;
primary6 = (lib.head nodes.primary.networking.interfaces.eth1.ipv6.addresses).address;
secondary4 = (lib.head nodes.secondary.networking.interfaces.eth1.ipv4.addresses).address;
secondary6 = (lib.head nodes.secondary.networking.interfaces.eth1.ipv6.addresses).address;
in
''
import re
start_all()
client.wait_for_unit("network.target")
primary.wait_for_unit("knot.service")
secondary.wait_for_unit("knot.service")
for zone in ("example.com.", "sub.example.com."):
secondary.wait_until_succeeds(
f"knotc zone-status {zone} | grep -q 'serial: 2019031302'"
)
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 ("${primary4}", "${primary6}", "${secondary4}", "${secondary6}"):
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")
primary.log(primary.succeed("systemd-analyze security knot.service | grep -v '✓'"))
'';
}
|
