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nixpkgs/nixos/modules/virtualisation/containers.nix

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{ config, lib, pkgs, utils, ... }:
let
cfg = config.virtualisation.containers;
inherit (lib) literalExpression mkOption types;
toml = pkgs.formats.toml { };
in
{
meta = {
maintainers = [] ++ lib.teams.podman.members;
};
imports = [
(
lib.mkRemovedOptionModule
[ "virtualisation" "containers" "users" ]
"All users with `isNormalUser = true` set now get appropriate subuid/subgid mappings."
)
(
lib.mkRemovedOptionModule
[ "virtualisation" "containers" "containersConf" "extraConfig" ]
"Use virtualisation.containers.containersConf.settings instead."
)
];
options.virtualisation.containers = {
enable =
mkOption {
type = types.bool;
default = false;
description = ''
This option enables the common /etc/containers configuration module.
'';
};
ociSeccompBpfHook.enable = mkOption {
type = types.bool;
default = false;
description = "Enable the OCI seccomp BPF hook";
};
containersConf.settings = mkOption {
type = toml.type;
default = { };
description = "containers.conf configuration";
};
containersConf.cniPlugins = mkOption {
type = types.listOf types.package;
defaultText = literalExpression ''
[
pkgs.cni-plugins
]
'';
example = literalExpression ''
[
pkgs.cniPlugins.dnsname
]
'';
description = ''
CNI plugins to install on the system.
'';
};
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storage.settings = mkOption {
type = toml.type;
default = {
storage = {
driver = "overlay";
graphroot = "/var/lib/containers/storage";
runroot = "/run/containers/storage";
};
};
description = "storage.conf configuration";
};
registries = {
search = mkOption {
type = types.listOf types.str;
default = [ "docker.io" "quay.io" ];
description = ''
List of repositories to search.
'';
};
insecure = mkOption {
default = [];
type = types.listOf types.str;
description = ''
List of insecure repositories.
'';
};
block = mkOption {
default = [];
type = types.listOf types.str;
description = ''
List of blocked repositories.
'';
};
};
policy = mkOption {
default = {};
type = types.attrs;
example = literalExpression ''
{
default = [ { type = "insecureAcceptAnything"; } ];
transports = {
docker-daemon = {
"" = [ { type = "insecureAcceptAnything"; } ];
};
};
}
'';
description = ''
Signature verification policy file.
If this option is empty the default policy file from
<literal>skopeo</literal> will be used.
'';
};
};
config = lib.mkIf cfg.enable {
virtualisation.containers.containersConf.cniPlugins = [ pkgs.cni-plugins ];
virtualisation.containers.containersConf.settings = {
network.cni_plugin_dirs = map (p: "${lib.getBin p}/bin") cfg.containersConf.cniPlugins;
engine = {
init_path = "${pkgs.catatonit}/bin/catatonit";
} // lib.optionalAttrs cfg.ociSeccompBpfHook.enable {
hooks_dir = [ config.boot.kernelPackages.oci-seccomp-bpf-hook ];
};
};
environment.etc."containers/containers.conf".source =
toml.generate "containers.conf" cfg.containersConf.settings;
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environment.etc."containers/storage.conf".source =
toml.generate "storage.conf" cfg.storage.settings;
environment.etc."containers/registries.conf".source = toml.generate "registries.conf" {
registries = lib.mapAttrs (n: v: { registries = v; }) cfg.registries;
};
environment.etc."containers/policy.json".source =
if cfg.policy != {} then pkgs.writeText "policy.json" (builtins.toJSON cfg.policy)
else utils.copyFile "${pkgs.skopeo.src}/default-policy.json";
};
}