90 lines
3.2 KiB
Nix
90 lines
3.2 KiB
Nix
{ nixpkgs, system }:
|
|
|
|
let pkgs = import nixpkgs { config = {}; inherit system; }; in
|
|
|
|
with pkgs;
|
|
with import ../lib/qemu-flags.nix;
|
|
|
|
rec {
|
|
|
|
inherit pkgs;
|
|
|
|
|
|
# Build a virtual network from an attribute set `{ machine1 =
|
|
# config1; ... machineN = configN; }', where `machineX' is the
|
|
# hostname and `configX' is a NixOS system configuration. Each
|
|
# machine is given an arbitrary IP address in the virtual network.
|
|
buildVirtualNetwork =
|
|
nodes: let nodesOut = lib.mapAttrs (n: buildVM nodesOut) (assignIPAddresses nodes); in nodesOut;
|
|
|
|
|
|
buildVM =
|
|
nodes: configurations:
|
|
|
|
import ./eval-config.nix {
|
|
inherit nixpkgs system;
|
|
modules = configurations ++
|
|
[ ../modules/virtualisation/qemu-vm.nix
|
|
../modules/testing/test-instrumentation.nix # !!! should only get added for automated test runs
|
|
{ key = "no-manual"; services.nixosManual.enable = false; }
|
|
];
|
|
extraArgs = { inherit nodes; };
|
|
};
|
|
|
|
|
|
# Given an attribute set { machine1 = config1; ... machineN =
|
|
# configN; }, sequentially assign IP addresses in the 192.168.1.0/24
|
|
# range to each machine, and set the hostname to the attribute name.
|
|
assignIPAddresses = nodes:
|
|
|
|
let
|
|
|
|
machines = lib.attrNames nodes;
|
|
|
|
machinesNumbered = lib.zipTwoLists machines (lib.range 1 254);
|
|
|
|
nodes_ = lib.flip map machinesNumbered (m: lib.nameValuePair m.first
|
|
[ ( { config, pkgs, nodes, ... }:
|
|
let
|
|
interfacesNumbered = lib.zipTwoLists config.virtualisation.vlans (lib.range 1 255);
|
|
interfaces =
|
|
lib.flip map interfacesNumbered ({ first, second }:
|
|
{ name = "eth${toString second}";
|
|
ipAddress = "192.168.${toString first}.${toString m.second}";
|
|
subnetMask = "255.255.255.0";
|
|
}
|
|
);
|
|
in
|
|
{ key = "ip-address";
|
|
config =
|
|
{ networking.hostName = m.first;
|
|
|
|
networking.interfaces = interfaces;
|
|
|
|
networking.primaryIPAddress =
|
|
lib.optionalString (interfaces != []) (lib.head interfaces).ipAddress;
|
|
|
|
# Put the IP addresses of all VMs in this machine's
|
|
# /etc/hosts file. If a machine has multiple
|
|
# interfaces, use the IP address corresponding to
|
|
# the first interface (i.e. the first network in its
|
|
# virtualisation.vlans option).
|
|
networking.extraHosts = lib.flip lib.concatMapStrings machines
|
|
(m: let config = (lib.getAttr m nodes).config; in
|
|
lib.optionalString (config.networking.primaryIPAddress != "")
|
|
("${config.networking.primaryIPAddress} " +
|
|
"${config.networking.hostName}\n"));
|
|
|
|
virtualisation.qemu.options =
|
|
lib.flip map interfacesNumbered
|
|
({ first, second }: qemuNICFlags second first m.second);
|
|
};
|
|
}
|
|
)
|
|
(lib.getAttr m.first nodes)
|
|
] );
|
|
|
|
in lib.listToAttrs nodes_;
|
|
|
|
}
|