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|
{ config, lib, pkgs, ... }:
let
cfg = config.virtualisation.podman;
inherit (lib) mkOption types;
podmanPackage = (pkgs.podman.override { inherit (cfg) extraPackages; });
# Provides a fake "docker" binary mapping to podman
dockerCompat = pkgs.runCommandNoCC "${podmanPackage.pname}-docker-compat-${podmanPackage.version}" {
outputs = [ "out" "man" ];
inherit (podmanPackage) meta;
} ''
mkdir -p $out/bin
ln -s ${podmanPackage}/bin/podman $out/bin/docker
mkdir -p $man/share/man/man1
for f in ${podmanPackage.man}/share/man/man1/*; do
basename=$(basename $f | sed s/podman/docker/g)
ln -s $f $man/share/man/man1/$basename
done
'';
# Copy configuration files to avoid having the entire sources in the system closure
copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} ''
cp ${filePath} $out
'';
in
{
meta = {
maintainers = lib.teams.podman.members;
};
options.virtualisation.podman = {
enable =
mkOption {
type = types.bool;
default = false;
description = ''
This option enables Podman, a daemonless container engine for
developing, managing, and running OCI Containers on your Linux System.
It is a drop-in replacement for the <command>docker</command> command.
'';
};
dockerCompat = mkOption {
type = types.bool;
default = false;
description = ''
Create an alias mapping <command>docker</command> to <command>podman</command>.
'';
};
extraPackages = mkOption {
type = with types; listOf package;
default = [ ];
example = lib.literalExample ''
[
pkgs.gvisor
]
'';
description = ''
Extra packages to be installed in the Podman wrapper.
'';
};
libpod = mkOption {
default = {};
description = "Libpod configuration";
type = types.submodule {
options = {
extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Extra configuration that should be put in the libpod.conf
configuration file
'';
};
};
};
};
package = lib.mkOption {
type = types.package;
default = podmanPackage;
internal = true;
description = ''
The final Podman package (including extra packages).
'';
};
};
config = lib.mkIf cfg.enable {
environment.systemPackages = [ cfg.package ]
++ lib.optional cfg.dockerCompat dockerCompat;
environment.etc."containers/libpod.conf".text = ''
cni_plugin_dir = ["${pkgs.cni-plugins}/bin/"]
'' + cfg.libpod.extraConfig;
environment.etc."cni/net.d/87-podman-bridge.conflist".source = copyFile "${pkgs.podman-unwrapped.src}/cni/87-podman-bridge.conflist";
# Enable common /etc/containers configuration
virtualisation.containers.enable = true;
assertions = [{
assertion = cfg.dockerCompat -> !config.virtualisation.docker.enable;
message = "Option dockerCompat conflicts with docker";
}];
};
}
|
