nixpkgs/modules/installer/tools/nixos-build-vms/build-vms.nix

{ nixos
, nixpkgs
, services ? "/etc/nixos/services"
, system ? builtins.currentSystem
, networkExpr
, useBackdoor ? false
}:

let nodes = import networkExpr;
in
(import "${nixos}/lib/build-vms.nix" {
  inherit nixpkgs services system useBackdoor;
})
.buildVirtualNetwork {
  inherit nodes;
}
- Added nixos-build-vms command, which builds a virtual network from a network.nix expression (also used by nixos-deploy-network) - Added a backdoor option to the interactive run-vms script. This allows me to intergrate the virtual network approach with Disnix - Small documentation fixes Some explanation: The nixos-build-vms command line tool can be used to build a virtual network of a network.nix specification. For example, a network configuration (network.nix) could look like this: { test1 = {pkgs, config, ...}: { services.openssh.enable = true; ... }; test2 = {pkgs, config, ...}: { services.openssh.enable = true; services.xserver.enable = true; } ; } By typing the following instruction: $ nixos-build-vms -n network.nix a virtual network is built, which can be started by typing: $ ./result/bin/run-vms It is also possible to enable a backdoor. In this case *.socket files are stored in the current directory which can be used by the end-user to invoke remote instruction on a VM in the network through a Unix domain socket. For example by building the network with the following instructions: $ nixos-build-vms -n network.nix --use-backdoor and launching the virtual network: $ ./result/bin/run-vms You can find two socket files in your current directory, namely: test1.socket and test2.socket. These Unix domain sockets can be used to remotely administer the test1 and test2 machine in the virtual network. For example by running: $ socat ./test1.socket stdio ls /root You can retrieve the contents of the /root directory of the virtual machine with identifier test1 svn path=/nixos/trunk/; revision=24410 2010-10-21 22:50:12 +00:00			`{ nixos`
			`, nixpkgs`
			`, services ? "/etc/nixos/services"`
			`, system ? builtins.currentSystem`
			`, networkExpr`
			`, useBackdoor ? false`
			`}:`

			`let nodes = import networkExpr;`
			`in`
			`(import "${nixos}/lib/build-vms.nix" {`
			`inherit nixpkgs services system useBackdoor;`
			`})`
			`.buildVirtualNetwork {`
			`inherit nodes;`
			`}`