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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.dockerRegistry;
blobCache = if cfg.enableRedisCache
then "redis"
else "inmemory";
registryConfig = {
version = "0.1";
log.fields.service = "registry";
storage = {
cache.blobdescriptor = blobCache;
delete.enabled = cfg.enableDelete;
} // (if cfg.storagePath != null
then { filesystem.rootdirectory = cfg.storagePath; }
else {});
http = {
addr = "${cfg.listenAddress}:${builtins.toString cfg.port}";
headers.X-Content-Type-Options = ["nosniff"];
};
health.storagedriver = {
enabled = true;
interval = "10s";
threshold = 3;
};
};
registryConfig.redis = mkIf cfg.enableRedisCache {
addr = "${cfg.redisUrl}";
password = "${cfg.redisPassword}";
db = 0;
dialtimeout = "10ms";
readtimeout = "10ms";
writetimeout = "10ms";
pool = {
maxidle = 16;
maxactive = 64;
idletimeout = "300s";
};
};
configFile = pkgs.writeText "docker-registry-config.yml" (builtins.toJSON (recursiveUpdate registryConfig cfg.extraConfig));
in {
options.services.dockerRegistry = {
enable = mkEnableOption "Docker Registry";
listenAddress = mkOption {
description = "Docker registry host or ip to bind to.";
default = "127.0.0.1";
type = types.str;
};
port = mkOption {
description = "Docker registry port to bind to.";
default = 5000;
type = types.port;
};
storagePath = mkOption {
type = types.nullOr types.path;
default = "/var/lib/docker-registry";
description = ''
Docker registry storage path for the filesystem storage backend. Set to
null to configure another backend via extraConfig.
'';
};
enableDelete = mkOption {
type = types.bool;
default = false;
description = "Enable delete for manifests and blobs.";
};
enableRedisCache = mkEnableOption "redis as blob cache";
redisUrl = mkOption {
type = types.str;
default = "localhost:6379";
description = "Set redis host and port.";
};
redisPassword = mkOption {
type = types.str;
default = "";
description = "Set redis password.";
};
extraConfig = mkOption {
description = ''
Docker extra registry configuration via environment variables.
'';
default = {};
type = types.attrs;
};
enableGarbageCollect = mkEnableOption "garbage collect";
garbageCollectDates = mkOption {
default = "daily";
type = types.str;
description = ''
Specification (in the format described by
<citerefentry><refentrytitle>systemd.time</refentrytitle>
<manvolnum>7</manvolnum></citerefentry>) of the time at
which the garbage collect will occur.
'';
};
};
config = mkIf cfg.enable {
systemd.services.docker-registry = {
description = "Docker Container Registry";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
script = ''
${pkgs.docker-distribution}/bin/registry serve ${configFile}
'';
serviceConfig = {
User = "docker-registry";
WorkingDirectory = cfg.storagePath;
AmbientCapabilities = mkIf (cfg.port < 1024) "cap_net_bind_service";
};
};
systemd.services.docker-registry-garbage-collect = {
description = "Run Garbage Collection for docker registry";
restartIfChanged = false;
unitConfig.X-StopOnRemoval = false;
serviceConfig.Type = "oneshot";
script = ''
${pkgs.docker-distribution}/bin/registry garbage-collect ${configFile}
/run/current-system/systemd/bin/systemctl restart docker-registry.service
'';
startAt = optional cfg.enableGarbageCollect cfg.garbageCollectDates;
};
users.users.docker-registry =
(if cfg.storagePath != null
then {
createHome = true;
home = cfg.storagePath;
}
else {}) // {
group = "docker-registry";
isSystemUser = true;
};
users.groups.docker-registry = {};
};
}
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