mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-23 15:33:13 +00:00
6afb255d97
these changes were generated with nixq 0.0.2, by running nixq ">> lib.mdDoc[remove] Argument[keep]" --batchmode nixos/**.nix nixq ">> mdDoc[remove] Argument[keep]" --batchmode nixos/**.nix nixq ">> Inherit >> mdDoc[remove]" --batchmode nixos/**.nix two mentions of the mdDoc function remain in nixos/, both of which are inside of comments. Since lib.mdDoc is already defined as just id, this commit is a no-op as far as Nix (and the built manual) is concerned.
392 lines
14 KiB
Nix
392 lines
14 KiB
Nix
{ config, options, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
let
|
|
cfg = config.virtualisation.oci-containers;
|
|
proxy_env = config.networking.proxy.envVars;
|
|
|
|
defaultBackend = options.virtualisation.oci-containers.backend.default;
|
|
|
|
containerOptions =
|
|
{ ... }: {
|
|
|
|
options = {
|
|
|
|
image = mkOption {
|
|
type = with types; str;
|
|
description = "OCI image to run.";
|
|
example = "library/hello-world";
|
|
};
|
|
|
|
imageFile = mkOption {
|
|
type = with types; nullOr package;
|
|
default = null;
|
|
description = ''
|
|
Path to an image file to load before running the image. This can
|
|
be used to bypass pulling the image from the registry.
|
|
|
|
The `image` attribute must match the name and
|
|
tag of the image contained in this file, as they will be used to
|
|
run the container with that image. If they do not match, the
|
|
image will be pulled from the registry as usual.
|
|
'';
|
|
example = literalExpression "pkgs.dockerTools.buildImage {...};";
|
|
};
|
|
|
|
login = {
|
|
|
|
username = mkOption {
|
|
type = with types; nullOr str;
|
|
default = null;
|
|
description = "Username for login.";
|
|
};
|
|
|
|
passwordFile = mkOption {
|
|
type = with types; nullOr str;
|
|
default = null;
|
|
description = "Path to file containing password.";
|
|
example = "/etc/nixos/dockerhub-password.txt";
|
|
};
|
|
|
|
registry = mkOption {
|
|
type = with types; nullOr str;
|
|
default = null;
|
|
description = "Registry where to login to.";
|
|
example = "https://docker.pkg.github.com";
|
|
};
|
|
|
|
};
|
|
|
|
cmd = mkOption {
|
|
type = with types; listOf str;
|
|
default = [];
|
|
description = "Commandline arguments to pass to the image's entrypoint.";
|
|
example = literalExpression ''
|
|
["--port=9000"]
|
|
'';
|
|
};
|
|
|
|
labels = mkOption {
|
|
type = with types; attrsOf str;
|
|
default = {};
|
|
description = "Labels to attach to the container at runtime.";
|
|
example = literalExpression ''
|
|
{
|
|
"traefik.https.routers.example.rule" = "Host(`example.container`)";
|
|
}
|
|
'';
|
|
};
|
|
|
|
entrypoint = mkOption {
|
|
type = with types; nullOr str;
|
|
description = "Override the default entrypoint of the image.";
|
|
default = null;
|
|
example = "/bin/my-app";
|
|
};
|
|
|
|
environment = mkOption {
|
|
type = with types; attrsOf str;
|
|
default = {};
|
|
description = "Environment variables to set for this container.";
|
|
example = literalExpression ''
|
|
{
|
|
DATABASE_HOST = "db.example.com";
|
|
DATABASE_PORT = "3306";
|
|
}
|
|
'';
|
|
};
|
|
|
|
environmentFiles = mkOption {
|
|
type = with types; listOf path;
|
|
default = [];
|
|
description = "Environment files for this container.";
|
|
example = literalExpression ''
|
|
[
|
|
/path/to/.env
|
|
/path/to/.env.secret
|
|
]
|
|
'';
|
|
};
|
|
|
|
log-driver = mkOption {
|
|
type = types.str;
|
|
default = "journald";
|
|
description = ''
|
|
Logging driver for the container. The default of
|
|
`"journald"` means that the container's logs will be
|
|
handled as part of the systemd unit.
|
|
|
|
For more details and a full list of logging drivers, refer to respective backends documentation.
|
|
|
|
For Docker:
|
|
[Docker engine documentation](https://docs.docker.com/engine/reference/run/#logging-drivers---log-driver)
|
|
|
|
For Podman:
|
|
Refer to the docker-run(1) man page.
|
|
'';
|
|
};
|
|
|
|
ports = mkOption {
|
|
type = with types; listOf str;
|
|
default = [];
|
|
description = ''
|
|
Network ports to publish from the container to the outer host.
|
|
|
|
Valid formats:
|
|
- `<ip>:<hostPort>:<containerPort>`
|
|
- `<ip>::<containerPort>`
|
|
- `<hostPort>:<containerPort>`
|
|
- `<containerPort>`
|
|
|
|
Both `hostPort` and `containerPort` can be specified as a range of
|
|
ports. When specifying ranges for both, the number of container
|
|
ports in the range must match the number of host ports in the
|
|
range. Example: `1234-1236:1234-1236/tcp`
|
|
|
|
When specifying a range for `hostPort` only, the `containerPort`
|
|
must *not* be a range. In this case, the container port is published
|
|
somewhere within the specified `hostPort` range.
|
|
Example: `1234-1236:1234/tcp`
|
|
|
|
Refer to the
|
|
[Docker engine documentation](https://docs.docker.com/engine/reference/run/#expose-incoming-ports) for full details.
|
|
'';
|
|
example = literalExpression ''
|
|
[
|
|
"8080:9000"
|
|
]
|
|
'';
|
|
};
|
|
|
|
user = mkOption {
|
|
type = with types; nullOr str;
|
|
default = null;
|
|
description = ''
|
|
Override the username or UID (and optionally groupname or GID) used
|
|
in the container.
|
|
'';
|
|
example = "nobody:nogroup";
|
|
};
|
|
|
|
volumes = mkOption {
|
|
type = with types; listOf str;
|
|
default = [];
|
|
description = ''
|
|
List of volumes to attach to this container.
|
|
|
|
Note that this is a list of `"src:dst"` strings to
|
|
allow for `src` to refer to `/nix/store` paths, which
|
|
would be difficult with an attribute set. There are
|
|
also a variety of mount options available as a third
|
|
field; please refer to the
|
|
[docker engine documentation](https://docs.docker.com/engine/reference/run/#volume-shared-filesystems) for details.
|
|
'';
|
|
example = literalExpression ''
|
|
[
|
|
"volume_name:/path/inside/container"
|
|
"/path/on/host:/path/inside/container"
|
|
]
|
|
'';
|
|
};
|
|
|
|
workdir = mkOption {
|
|
type = with types; nullOr str;
|
|
default = null;
|
|
description = "Override the default working directory for the container.";
|
|
example = "/var/lib/hello_world";
|
|
};
|
|
|
|
dependsOn = mkOption {
|
|
type = with types; listOf str;
|
|
default = [];
|
|
description = ''
|
|
Define which other containers this one depends on. They will be added to both After and Requires for the unit.
|
|
|
|
Use the same name as the attribute under `virtualisation.oci-containers.containers`.
|
|
'';
|
|
example = literalExpression ''
|
|
virtualisation.oci-containers.containers = {
|
|
node1 = {};
|
|
node2 = {
|
|
dependsOn = [ "node1" ];
|
|
}
|
|
}
|
|
'';
|
|
};
|
|
|
|
hostname = mkOption {
|
|
type = with types; nullOr str;
|
|
default = null;
|
|
description = "The hostname of the container.";
|
|
example = "hello-world";
|
|
};
|
|
|
|
extraOptions = mkOption {
|
|
type = with types; listOf str;
|
|
default = [];
|
|
description = "Extra options for {command}`${defaultBackend} run`.";
|
|
example = literalExpression ''
|
|
["--network=host"]
|
|
'';
|
|
};
|
|
|
|
autoStart = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
When enabled, the container is automatically started on boot.
|
|
If this option is set to false, the container has to be started on-demand via its service.
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
isValidLogin = login: login.username != null && login.passwordFile != null && login.registry != null;
|
|
|
|
mkService = name: container: let
|
|
dependsOn = map (x: "${cfg.backend}-${x}.service") container.dependsOn;
|
|
escapedName = escapeShellArg name;
|
|
preStartScript = pkgs.writeShellApplication {
|
|
name = "pre-start";
|
|
runtimeInputs = [ ];
|
|
text = ''
|
|
${cfg.backend} rm -f ${name} || true
|
|
${optionalString (isValidLogin container.login) ''
|
|
# try logging in, if it fails, check if image exists locally
|
|
${cfg.backend} login \
|
|
${container.login.registry} \
|
|
--username ${container.login.username} \
|
|
--password-stdin < ${container.login.passwordFile} \
|
|
|| ${cfg.backend} image inspect ${container.image} >/dev/null \
|
|
|| { echo "image doesn't exist locally and login failed" >&2 ; exit 1; }
|
|
''}
|
|
${optionalString (container.imageFile != null) ''
|
|
${cfg.backend} load -i ${container.imageFile}
|
|
''}
|
|
${optionalString (cfg.backend == "podman") ''
|
|
rm -f /run/podman-${escapedName}.ctr-id
|
|
''}
|
|
'';
|
|
};
|
|
in {
|
|
wantedBy = [] ++ optional (container.autoStart) "multi-user.target";
|
|
wants = lib.optional (container.imageFile == null) "network-online.target";
|
|
after = lib.optionals (cfg.backend == "docker") [ "docker.service" "docker.socket" ]
|
|
# if imageFile is not set, the service needs the network to download the image from the registry
|
|
++ lib.optionals (container.imageFile == null) [ "network-online.target" ]
|
|
++ dependsOn;
|
|
requires = dependsOn;
|
|
environment = proxy_env;
|
|
|
|
path =
|
|
if cfg.backend == "docker" then [ config.virtualisation.docker.package ]
|
|
else if cfg.backend == "podman" then [ config.virtualisation.podman.package ]
|
|
else throw "Unhandled backend: ${cfg.backend}";
|
|
|
|
script = concatStringsSep " \\\n " ([
|
|
"exec ${cfg.backend} run"
|
|
"--rm"
|
|
"--name=${escapedName}"
|
|
"--log-driver=${container.log-driver}"
|
|
] ++ optional (container.entrypoint != null)
|
|
"--entrypoint=${escapeShellArg container.entrypoint}"
|
|
++ optional (container.hostname != null)
|
|
"--hostname=${escapeShellArg container.hostname}"
|
|
++ lib.optionals (cfg.backend == "podman") [
|
|
"--cidfile=/run/podman-${escapedName}.ctr-id"
|
|
"--cgroups=no-conmon"
|
|
"--sdnotify=conmon"
|
|
"-d"
|
|
"--replace"
|
|
] ++ (mapAttrsToList (k: v: "-e ${escapeShellArg k}=${escapeShellArg v}") container.environment)
|
|
++ map (f: "--env-file ${escapeShellArg f}") container.environmentFiles
|
|
++ map (p: "-p ${escapeShellArg p}") container.ports
|
|
++ optional (container.user != null) "-u ${escapeShellArg container.user}"
|
|
++ map (v: "-v ${escapeShellArg v}") container.volumes
|
|
++ (mapAttrsToList (k: v: "-l ${escapeShellArg k}=${escapeShellArg v}") container.labels)
|
|
++ optional (container.workdir != null) "-w ${escapeShellArg container.workdir}"
|
|
++ map escapeShellArg container.extraOptions
|
|
++ [container.image]
|
|
++ map escapeShellArg container.cmd
|
|
);
|
|
|
|
preStop = if cfg.backend == "podman"
|
|
then "podman stop --ignore --cidfile=/run/podman-${escapedName}.ctr-id"
|
|
else "${cfg.backend} stop ${name} || true";
|
|
|
|
postStop = if cfg.backend == "podman"
|
|
then "podman rm -f --ignore --cidfile=/run/podman-${escapedName}.ctr-id"
|
|
else "${cfg.backend} rm -f ${name} || true";
|
|
|
|
serviceConfig = {
|
|
### There is no generalized way of supporting `reload` for docker
|
|
### containers. Some containers may respond well to SIGHUP sent to their
|
|
### init process, but it is not guaranteed; some apps have other reload
|
|
### mechanisms, some don't have a reload signal at all, and some docker
|
|
### images just have broken signal handling. The best compromise in this
|
|
### case is probably to leave ExecReload undefined, so `systemctl reload`
|
|
### will at least result in an error instead of potentially undefined
|
|
### behaviour.
|
|
###
|
|
### Advanced users can still override this part of the unit to implement
|
|
### a custom reload handler, since the result of all this is a normal
|
|
### systemd service from the perspective of the NixOS module system.
|
|
###
|
|
# ExecReload = ...;
|
|
###
|
|
ExecStartPre = [ "${preStartScript}/bin/pre-start" ];
|
|
TimeoutStartSec = 0;
|
|
TimeoutStopSec = 120;
|
|
Restart = "always";
|
|
} // optionalAttrs (cfg.backend == "podman") {
|
|
Environment="PODMAN_SYSTEMD_UNIT=podman-${name}.service";
|
|
Type="notify";
|
|
NotifyAccess="all";
|
|
};
|
|
};
|
|
|
|
in {
|
|
imports = [
|
|
(
|
|
lib.mkChangedOptionModule
|
|
[ "docker-containers" ]
|
|
[ "virtualisation" "oci-containers" ]
|
|
(oldcfg: {
|
|
backend = "docker";
|
|
containers = lib.mapAttrs (n: v: builtins.removeAttrs (v // {
|
|
extraOptions = v.extraDockerOptions or [];
|
|
}) [ "extraDockerOptions" ]) oldcfg.docker-containers;
|
|
})
|
|
)
|
|
];
|
|
|
|
options.virtualisation.oci-containers = {
|
|
|
|
backend = mkOption {
|
|
type = types.enum [ "podman" "docker" ];
|
|
default = if versionAtLeast config.system.stateVersion "22.05" then "podman" else "docker";
|
|
description = "The underlying Docker implementation to use.";
|
|
};
|
|
|
|
containers = mkOption {
|
|
default = {};
|
|
type = types.attrsOf (types.submodule containerOptions);
|
|
description = "OCI (Docker) containers to run as systemd services.";
|
|
};
|
|
|
|
};
|
|
|
|
config = lib.mkIf (cfg.containers != {}) (lib.mkMerge [
|
|
{
|
|
systemd.services = mapAttrs' (n: v: nameValuePair "${cfg.backend}-${n}" (mkService n v)) cfg.containers;
|
|
}
|
|
(lib.mkIf (cfg.backend == "podman") {
|
|
virtualisation.podman.enable = true;
|
|
})
|
|
(lib.mkIf (cfg.backend == "docker") {
|
|
virtualisation.docker.enable = true;
|
|
})
|
|
]);
|
|
|
|
}
|