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|
# Test Nix's remote build feature.
{ nixpkgs, system, overlay }:
with import (nixpkgs + "/nixos/lib/testing.nix") {
inherit system;
extraConfigurations = [ { nixpkgs.overlays = [ overlay ]; } ];
};
makeTest (
let
# The configuration of the remote builders.
builder =
{ config, pkgs, ... }:
{ services.openssh.enable = true;
virtualisation.writableStore = true;
nix.useSandbox = true;
};
# Trivial Nix expression to build remotely.
expr = config: nr: pkgs.writeText "expr.nix"
''
let utils = builtins.storePath ${config.system.build.extraUtils}; in
derivation {
name = "hello-${toString nr}";
system = "i686-linux";
PATH = "''${utils}/bin";
builder = "''${utils}/bin/sh";
args = [ "-c" "if [ ${toString nr} = 5 ]; then echo FAIL; exit 1; fi; echo Hello; mkdir $out $foo; cat /proc/sys/kernel/hostname > $out/host; ln -s $out $foo/bar; sleep 10" ];
outputs = [ "out" "foo" ];
}
'';
in
{
nodes =
{ builder1 = builder;
builder2 = builder;
client =
{ config, lib, pkgs, ... }:
{ nix.maxJobs = 0; # force remote building
nix.distributedBuilds = true;
nix.buildMachines =
[ { hostName = "builder1";
sshUser = "root";
sshKey = "/root/.ssh/id_ed25519";
system = "i686-linux";
maxJobs = 1;
}
{ hostName = "builder2";
sshUser = "root";
sshKey = "/root/.ssh/id_ed25519";
system = "i686-linux";
maxJobs = 1;
}
];
virtualisation.writableStore = true;
virtualisation.pathsInNixDB = [ config.system.build.extraUtils ];
nix.binaryCaches = lib.mkForce [ ];
programs.ssh.extraConfig = "ConnectTimeout 30";
};
};
testScript = { nodes }:
''
startAll;
# Create an SSH key on the client.
my $key = `${pkgs.openssh}/bin/ssh-keygen -t ed25519 -f key -N ""`;
$client->succeed("mkdir -p -m 700 /root/.ssh");
$client->copyFileFromHost("key", "/root/.ssh/id_ed25519");
$client->succeed("chmod 600 /root/.ssh/id_ed25519");
# Install the SSH key on the builders.
$client->waitForUnit("network.target");
foreach my $builder ($builder1, $builder2) {
$builder->succeed("mkdir -p -m 700 /root/.ssh");
$builder->copyFileFromHost("key.pub", "/root/.ssh/authorized_keys");
$builder->waitForUnit("sshd");
$client->succeed("ssh -o StrictHostKeyChecking=no " . $builder->name() . " 'echo hello world'");
}
# Perform a build and check that it was performed on the builder.
my $out = $client->succeed(
"nix-build ${expr nodes.client.config 1} 2> build-output",
"grep -q Hello build-output"
);
$builder1->succeed("test -e $out");
# And a parallel build.
my ($out1, $out2) = split /\s/,
$client->succeed('nix-store -r $(nix-instantiate ${expr nodes.client.config 2})\!out $(nix-instantiate ${expr nodes.client.config 3})\!out');
$builder1->succeed("test -e $out1 -o -e $out2");
$builder2->succeed("test -e $out1 -o -e $out2");
# And a failing build.
$client->fail("nix-build ${expr nodes.client.config 5}");
# Test whether the build hook automatically skips unavailable builders.
$builder1->block;
$client->succeed("nix-build ${expr nodes.client.config 4}");
'';
})
|
