137 lines
4 KiB
Nix
137 lines
4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.etcd;
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in {
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options.services.etcd = {
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enable = mkOption {
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description = "Whether to enable etcd.";
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default = false;
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type = types.bool;
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};
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name = mkOption {
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description = "Etcd unique node name.";
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default = config.networking.hostName;
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type = types.str;
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};
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advertiseClientUrls = mkOption {
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description = "Etcd list of this member's client URLs to advertise to the rest of the cluster.";
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default = cfg.listenClientUrls;
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type = types.listOf types.str;
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};
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listenClientUrls = mkOption {
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description = "Etcd list of URLs to listen on for client traffic.";
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default = ["http://localhost:4001"];
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type = types.listOf types.str;
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};
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listenPeerUrls = mkOption {
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description = "Etcd list of URLs to listen on for peer traffic.";
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default = ["http://localhost:7001"];
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type = types.listOf types.str;
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};
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initialAdvertisePeerUrls = mkOption {
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description = "Etcd list of this member's peer URLs to advertise to rest of the cluster.";
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default = cfg.listenPeerUrls;
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type = types.listOf types.str;
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};
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initialCluster = mkOption {
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description = "Etcd initial cluster configuration for bootstrapping.";
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default = ["${cfg.name}=http://localhost:7001"];
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type = types.listOf types.str;
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};
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initialClusterState = mkOption {
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description = "Etcd initial cluster configuration for bootstrapping.";
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default = "new";
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type = types.enum ["new" "existing"];
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};
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initialClusterToken = mkOption {
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description = "Etcd initial cluster token for etcd cluster during bootstrap.";
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default = "etcd-cluster";
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type = types.str;
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};
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discovery = mkOption {
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description = "Etcd discovery url";
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default = "";
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type = types.str;
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};
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extraConf = mkOption {
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description = ''
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Etcd extra configuration. See
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<link xlink:href='https://github.com/coreos/etcd/blob/master/Documentation/configuration.md#environment-variables' />
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'';
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type = types.attrsOf types.str;
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default = {};
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example = literalExample ''
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{
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"CORS" = "*";
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"NAME" = "default-name";
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"MAX_RESULT_BUFFER" = "1024";
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"MAX_CLUSTER_SIZE" = "9";
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"MAX_RETRY_ATTEMPTS" = "3";
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}
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'';
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};
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dataDir = mkOption {
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type = types.path;
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default = "/var/lib/etcd";
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description = "Etcd data directory.";
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};
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};
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config = mkIf cfg.enable {
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systemd.services.etcd = {
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description = "Etcd Daemon";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-interfaces.target" ];
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environment = {
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ETCD_NAME = cfg.name;
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ETCD_DISCOVERY = cfg.discovery;
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ETCD_DATA_DIR = cfg.dataDir;
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ETCD_ADVERTISE_CLIENT_URLS = concatStringsSep "," cfg.advertiseClientUrls;
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ETCD_LISTEN_CLIENT_URLS = concatStringsSep "," cfg.listenClientUrls;
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ETCD_LISTEN_PEER_URLS = concatStringsSep "," cfg.listenPeerUrls;
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ETCD_INITIAL_ADVERTISE_PEER_URLS = concatStringsSep "," cfg.initialAdvertisePeerUrls;
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} // (optionalAttrs (cfg.discovery == ""){
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ETCD_INITIAL_CLUSTER = concatStringsSep "," cfg.initialCluster;
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ETCD_INITIAL_CLUSTER_STATE = cfg.initialClusterState;
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ETCD_INITIAL_CLUSTER_TOKEN = cfg.initialClusterToken;
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}) // (mapAttrs' (n: v: nameValuePair "ETCD_${n}" v) cfg.extraConf);
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serviceConfig = {
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Type = "notify";
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ExecStart = "${pkgs.etcd}/bin/etcd";
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User = "etcd";
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PermissionsStartOnly = true;
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};
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preStart = ''
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mkdir -m 0700 -p ${cfg.dataDir}
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if [ "$(id -u)" = 0 ]; then chown etcd ${cfg.dataDir}; fi
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'';
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};
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environment.systemPackages = [ pkgs.etcdctl ];
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users.extraUsers = singleton {
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name = "etcd";
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uid = config.ids.uids.etcd;
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description = "Etcd daemon user";
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home = cfg.dataDir;
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};
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};
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}
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