mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-04 19:45:54 +00:00
100 lines
3.6 KiB
Nix
100 lines
3.6 KiB
Nix
{ system
|
|
, # Use a minimal kernel?
|
|
minimal ? false
|
|
, # Ignored
|
|
config ? null
|
|
, # Nixpkgs, for qemu, lib and more
|
|
pkgs
|
|
, # !!! See comment about args in lib/modules.nix
|
|
specialArgs ? {}
|
|
, # NixOS configuration to add to the VMs
|
|
extraConfigurations ? []
|
|
}:
|
|
|
|
with pkgs.lib;
|
|
with import ../lib/qemu-flags.nix { inherit pkgs; };
|
|
|
|
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 = mapAttrs (n: buildVM nodesOut) (assignIPAddresses nodes); in nodesOut;
|
|
|
|
|
|
buildVM =
|
|
nodes: configurations:
|
|
|
|
import ./eval-config.nix {
|
|
inherit system specialArgs;
|
|
modules = configurations ++ extraConfigurations;
|
|
baseModules = (import ../modules/module-list.nix) ++
|
|
[ ../modules/virtualisation/qemu-vm.nix
|
|
../modules/testing/test-instrumentation.nix # !!! should only get added for automated test runs
|
|
{ key = "no-manual"; documentation.nixos.enable = false; }
|
|
{ key = "nodes"; _module.args.nodes = nodes; }
|
|
] ++ optional minimal ../modules/testing/minimal-kernel.nix;
|
|
};
|
|
|
|
|
|
# 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 = attrNames nodes;
|
|
|
|
machinesNumbered = zipLists machines (range 1 254);
|
|
|
|
nodes_ = forEach machinesNumbered (m: nameValuePair m.fst
|
|
[ ( { config, nodes, ... }:
|
|
let
|
|
interfacesNumbered = zipLists config.virtualisation.vlans (range 1 255);
|
|
interfaces = forEach interfacesNumbered ({ fst, snd }:
|
|
nameValuePair "eth${toString snd}" { ipv4.addresses =
|
|
[ { address = "192.168.${toString fst}.${toString m.snd}";
|
|
prefixLength = 24;
|
|
} ];
|
|
});
|
|
in
|
|
{ key = "ip-address";
|
|
config =
|
|
{ networking.hostName = mkDefault m.fst;
|
|
|
|
networking.interfaces = listToAttrs interfaces;
|
|
|
|
networking.primaryIPAddress =
|
|
optionalString (interfaces != []) (head (head interfaces).value.ipv4.addresses).address;
|
|
|
|
# Put the IP addresses of all VMs in this machine's
|
|
# /etc/hosts file. If a machine has multiple
|
|
# interfaces, use the IP address corresponding to
|
|
# the first interface (i.e. the first network in its
|
|
# virtualisation.vlans option).
|
|
networking.extraHosts = flip concatMapStrings machines
|
|
(m': let config = (getAttr m' nodes).config; in
|
|
optionalString (config.networking.primaryIPAddress != "")
|
|
("${config.networking.primaryIPAddress} " +
|
|
optionalString (config.networking.domain != null)
|
|
"${config.networking.hostName}.${config.networking.domain} " +
|
|
"${config.networking.hostName}\n"));
|
|
|
|
virtualisation.qemu.options =
|
|
forEach interfacesNumbered
|
|
({ fst, snd }: qemuNICFlags snd fst m.snd);
|
|
};
|
|
}
|
|
)
|
|
(getAttr m.fst nodes)
|
|
] );
|
|
|
|
in listToAttrs nodes_;
|
|
|
|
}
|