b3de22483c
This is a decomposition of the testing-python.nix and build-vms.nix
files into modules.
By refactoring the glue, we accomplish the following:
- NixOS tests can now use `imports` and other module system features.
- Network-wide test setup can now be reusable; example:
- A setup with all VMs configured to use a DNS server
- Split long, slow tests into multiple tests that import a
common module that has most of the setup.
- Type checking for the test arguments
- (TBD) "generated" options reference docs
- Aspects that had to be wired through all the glue are now in their
own files.
- Chief example: interactive.nix.
- Also: network.nix
In rewriting this, I've generally stuck as close as possible to the
existing code; copying pieces of logic and rewiring them, without
changing the logic itself.
I've made two exceptions to this rule
- Introduction of `extraDriverArgs` instead of hardcoded
interactivity logic.
- Incorporation of https://github.com/NixOS/nixpkgs/pull/144110
in testScript.nix.
I might revert the latter and split it into a new commit.
76 lines
2.4 KiB
Nix
76 lines
2.4 KiB
Nix
{ lib, nodes, ... }:
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with lib;
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let
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machines = attrNames nodes;
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machinesNumbered = zipLists machines (range 1 254);
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nodes_ = forEach machinesNumbered (m: nameValuePair m.fst
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[
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({ config, nodes, pkgs, ... }:
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let
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interfacesNumbered = zipLists config.virtualisation.vlans (range 1 255);
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interfaces = forEach interfacesNumbered ({ fst, snd }:
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nameValuePair "eth${toString snd}" {
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ipv4.addresses =
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[{
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address = "192.168.${toString fst}.${toString m.snd}";
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prefixLength = 24;
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}];
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});
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networkConfig =
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{
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networking.hostName = mkDefault m.fst;
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networking.interfaces = listToAttrs interfaces;
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networking.primaryIPAddress =
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optionalString (interfaces != [ ]) (head (head interfaces).value.ipv4.addresses).address;
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# Put the IP addresses of all VMs in this machine's
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# /etc/hosts file. If a machine has multiple
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# interfaces, use the IP address corresponding to
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# the first interface (i.e. the first network in its
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# virtualisation.vlans option).
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networking.extraHosts = flip concatMapStrings machines
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(m':
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let config = (getAttr m' nodes).config; in
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optionalString (config.networking.primaryIPAddress != "")
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("${config.networking.primaryIPAddress} " +
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optionalString (config.networking.domain != null)
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"${config.networking.hostName}.${config.networking.domain} " +
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"${config.networking.hostName}\n"));
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virtualisation.qemu.options =
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let qemu-common = import ../qemu-common.nix { inherit lib pkgs; };
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in
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flip concatMap interfacesNumbered
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({ fst, snd }: qemu-common.qemuNICFlags snd fst m.snd);
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};
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in
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{
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key = "ip-address";
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config = networkConfig // {
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# Expose the networkConfig items for tests like nixops
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# that need to recreate the network config.
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system.build.networkConfig = networkConfig;
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};
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}
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)
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]);
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extraNodeConfigs = lib.listToAttrs nodes_;
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in
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{
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config = {
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defaults = { config, name, ... }: {
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imports = extraNodeConfigs.${name};
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};
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};
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}
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