{ config, lib, pkgs, ... }: with lib; let cfg = config.services.foundationdb; # used for initial cluster configuration initialIpAddr = if (cfg.publicAddress != "auto") then cfg.publicAddress else "127.0.0.1"; fdbServers = n: concatStringsSep "\n" (map (x: "[fdbserver.${toString (x+cfg.listenPortStart)}]") (range 0 (n - 1))); backupAgents = n: concatStringsSep "\n" (map (x: "[backup_agent.${toString x}]") (range 1 n)); configFile = pkgs.writeText "foundationdb.conf" '' [general] cluster_file = /etc/foundationdb/fdb.cluster [fdbmonitor] restart_delay = ${toString cfg.restartDelay} user = ${cfg.user} group = ${cfg.group} [fdbserver] command = ${pkgs.foundationdb}/bin/fdbserver public_address = ${cfg.publicAddress}:$ID listen_address = ${cfg.listenAddress} datadir = ${cfg.dataDir}/$ID logdir = ${cfg.logDir} logsize = ${cfg.logSize} maxlogssize = ${cfg.maxLogSize} ${optionalString (cfg.class != null) "class = ${cfg.class}"} memory = ${cfg.memory} storage_memory = ${cfg.storageMemory} ${optionalString (cfg.locality.machineId != null) "locality_machineid=${cfg.locality.machineId}"} ${optionalString (cfg.locality.zoneId != null) "locality_zoneid=${cfg.locality.zoneId}"} ${optionalString (cfg.locality.datacenterId != null) "locality_dcid=${cfg.locality.datacenterId}"} ${optionalString (cfg.locality.dataHall != null) "locality_data_hall=${cfg.locality.dataHall}"} ${fdbServers cfg.serverProcesses} [backup_agent] command = ${pkgs.foundationdb}/libexec/backup_agent ${backupAgents cfg.backupProcesses} ''; in { options.services.foundationdb = { enable = mkEnableOption "FoundationDB Server"; publicAddress = mkOption { type = types.str; default = "auto"; description = "Publicly visible IP address of the process. Port is determined by process ID"; }; listenAddress = mkOption { type = types.str; default = "public"; description = "Publicly visible IP address of the process. Port is determined by process ID"; }; listenPortStart = mkOption { type = types.int; default = 4500; description = '' Starting port number for database listening sockets. Every FDB process binds to a subsequent port, to this number reflects the start of the overall range. e.g. having 8 server processes will use all ports between 4500 and 4507. ''; }; openFirewall = mkOption { type = types.bool; default = false; description = '' Open the firewall ports corresponding to FoundationDB processes and coordinators using . ''; }; dataDir = mkOption { type = types.path; default = "/var/lib/foundationdb"; description = "Data directory. All cluster data will be put under here."; }; logDir = mkOption { type = types.path; default = "/var/log/foundationdb"; description = "Log directory."; }; user = mkOption { type = types.str; default = "foundationdb"; description = "User account under which FoundationDB runs."; }; group = mkOption { type = types.str; default = "foundationdb"; description = "Group account under which FoundationDB runs."; }; class = mkOption { type = types.nullOr (types.enum [ "storage" "transaction" "stateless" ]); default = null; description = "Process class"; }; restartDelay = mkOption { type = types.int; default = 10; description = "Number of seconds to wait before restarting servers."; }; logSize = mkOption { type = types.string; default = "10MiB"; description = '' Roll over to a new log file after the current log file reaches the specified size. ''; }; maxLogSize = mkOption { type = types.string; default = "100MiB"; description = '' Delete the oldest log file when the total size of all log files exceeds the specified size. If set to 0, old log files will not be deleted. ''; }; serverProcesses = mkOption { type = types.int; default = 1; description = "Number of fdbserver processes to run."; }; backupProcesses = mkOption { type = types.int; default = 1; description = "Number of backup_agent processes to run for snapshots."; }; memory = mkOption { type = types.string; default = "8GiB"; description = '' Maximum memory used by the process. The default value is 8GiB. When specified without a unit, MiB is assumed. This parameter does not change the memory allocation of the program. Rather, it sets a hard limit beyond which the process will kill itself and be restarted. The default value of 8GiB is double the intended memory usage in the default configuration (providing an emergency buffer to deal with memory leaks or similar problems). It is not recommended to decrease the value of this parameter below its default value. It may be increased if you wish to allocate a very large amount of storage engine memory or cache. In particular, when the storageMemory parameter is increased, the memory parameter should be increased by an equal amount. ''; }; storageMemory = mkOption { type = types.string; default = "1GiB"; description = '' Maximum memory used for data storage. The default value is 1GiB. When specified without a unit, MB is assumed. Clusters using the memory storage engine will be restricted to using this amount of memory per process for purposes of data storage. Memory overhead associated with storing the data is counted against this total. If you increase the storageMemory, you should also increase the memory parameter by the same amount. ''; }; locality = mkOption { default = { machineId = null; zoneId = null; datacenterId = null; dataHall = null; }; description = '' FoundationDB locality settings. ''; type = types.submodule ({ options = { machineId = mkOption { default = null; type = types.nullOr types.str; description = '' Machine identifier key. All processes on a machine should share a unique id. By default, processes on a machine determine a unique id to share. This does not generally need to be set. ''; }; zoneId = mkOption { default = null; type = types.nullOr types.str; description = '' Zone identifier key. Processes that share a zone id are considered non-unique for the purposes of data replication. If unset, defaults to machine id. ''; }; datacenterId = mkOption { default = null; type = types.nullOr types.str; description = '' Data center identifier key. All processes physically located in a data center should share the id. If you are depending on data center based replication this must be set on all processes. ''; }; dataHall = mkOption { default = null; type = types.nullOr types.str; description = '' Data hall identifier key. All processes physically located in a data hall should share the id. If you are depending on data hall based replication this must be set on all processes. ''; }; }; }); }; extraReadWritePaths = mkOption { default = [ ]; type = types.listOf types.path; description = '' An extra set of filesystem paths that FoundationDB can read to and write from. By default, FoundationDB runs under a heavily namespaced systemd environment without write access to most of the filesystem outside of its data and log directories. By adding paths to this list, the set of writeable paths will be expanded. This is useful for allowing e.g. backups to local files, which must be performed on behalf of the foundationdb service. ''; }; pidfile = mkOption { type = types.path; default = "/run/foundationdb.pid"; description = "Path to pidfile for fdbmonitor."; }; }; config = mkIf cfg.enable { meta.doc = ./foundationdb.xml; meta.maintainers = with lib.maintainers; [ thoughtpolice ]; environment.systemPackages = [ pkgs.foundationdb ]; users.extraUsers = optionalAttrs (cfg.user == "foundationdb") (singleton { name = "foundationdb"; description = "FoundationDB User"; uid = config.ids.uids.foundationdb; group = cfg.group; }); users.extraGroups = optionalAttrs (cfg.group == "foundationdb") (singleton { name = "foundationdb"; gid = config.ids.gids.foundationdb; }); networking.firewall.allowedTCPPortRanges = mkIf cfg.openFirewall [ { from = cfg.listenPortStart; to = (cfg.listenPortStart + cfg.serverProcesses) - 1; } ]; systemd.services.foundationdb = { description = "FoundationDB Service"; after = [ "network.target" ]; wantedBy = [ "multi-user.target" ]; unitConfig = { RequiresMountsFor = "${cfg.dataDir} ${cfg.logDir}"; }; serviceConfig = let rwpaths = [ cfg.dataDir cfg.logDir cfg.pidfile "/etc/foundationdb" ] ++ cfg.extraReadWritePaths; in { Type = "simple"; Restart = "always"; RestartSec = 5; User = cfg.user; Group = cfg.group; PIDFile = "${cfg.pidfile}"; PermissionsStartOnly = true; # setup needs root perms TimeoutSec = 120; # give reasonable time to shut down # Security options NoNewPrivileges = true; ProtectHome = true; ProtectSystem = "strict"; ProtectKernelTunables = true; ProtectControlGroups = true; PrivateTmp = true; PrivateDevices = true; ReadWritePaths = lib.concatStringsSep " " (map (x: "-" + x) rwpaths); }; path = [ pkgs.foundationdb pkgs.coreutils ]; preStart = '' rm -f ${cfg.pidfile} && \ touch ${cfg.pidfile} && \ chown -R ${cfg.user}:${cfg.group} ${cfg.pidfile} for x in "${cfg.logDir}" "${cfg.dataDir}" /etc/foundationdb; do [ ! -d "$x" ] && mkdir -m 0700 -vp "$x" && chown -R ${cfg.user}:${cfg.group} "$x"; done if [ ! -f /etc/foundationdb/fdb.cluster ]; then cf=/etc/foundationdb/fdb.cluster desc=$(tr -dc A-Za-z0-9 /dev/null | head -c8) rand=$(tr -dc A-Za-z0-9 /dev/null | head -c8) echo ''${desc}:''${rand}@${initialIpAddr}:${builtins.toString cfg.listenPortStart} > $cf chmod 0660 $cf && chown -R ${cfg.user}:${cfg.group} $cf touch "${cfg.dataDir}/.first_startup" fi ''; script = '' exec fdbmonitor --lockfile ${cfg.pidfile} --conffile ${configFile}; ''; postStart = '' if [ -e "${cfg.dataDir}/.first_startup" ]; then fdbcli --exec "configure new single ssd" rm -f "${cfg.dataDir}/.first_startup"; fi ''; }; }; }