nixpkgs/nixos/tests/hostname.nix

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{ system ? builtins.currentSystem
, config ? { }
, pkgs ? import ../.. { inherit system config; }
}:
with import ../lib/testing-python.nix { inherit system pkgs; };
with pkgs.lib;
let
makeHostNameTest = hostName: domain: fqdnOrNull:
let
fqdn = hostName + (optionalString (domain != null) ".${domain}");
getStr = str: # maybeString2String
let res = builtins.tryEval str;
in if (res.success && res.value != null) then res.value else "null";
in
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makeTest {
name = "hostname-${fqdn}";
meta = with pkgs.lib.maintainers; {
maintainers = [ primeos blitz ];
};
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nodes.machine = { lib, ... }: {
networking.hostName = hostName;
networking.domain = domain;
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environment.systemPackages = with pkgs; [
inetutils
];
};
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testScript = { nodes, ... }: ''
start_all()
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machine = ${hostName}
machine.systemctl("start network-online.target")
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machine.wait_for_unit("network-online.target")
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# Test if NixOS computes the correct FQDN (either a FQDN or an error/null):
assert "${getStr nodes.machine.networking.fqdn}" == "${getStr fqdnOrNull}"
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# The FQDN, domain name, and hostname detection should work as expected:
assert "${fqdn}" == machine.succeed("hostname --fqdn").strip()
assert "${optionalString (domain != null) domain}" == machine.succeed("dnsdomainname").strip()
assert (
"${hostName}"
== machine.succeed(
'hostnamectl status | grep "Static hostname" | cut -d: -f2'
).strip()
)
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# 127.0.0.1 and ::1 should resolve back to "localhost":
assert (
"localhost" == machine.succeed("getent hosts 127.0.0.1 | awk '{print $2}'").strip()
)
assert "localhost" == machine.succeed("getent hosts ::1 | awk '{print $2}'").strip()
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# 127.0.0.2 should resolve back to the FQDN and hostname:
fqdn_and_host_name = "${optionalString (domain != null) "${hostName}.${domain} "}${hostName}"
assert (
fqdn_and_host_name
== machine.succeed("getent hosts 127.0.0.2 | awk '{print $2,$3}'").strip()
)
'';
};
in
{
noExplicitDomain = makeHostNameTest "ahost" null null;
explicitDomain = makeHostNameTest "ahost" "adomain" "ahost.adomain";
}