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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.zookeeper;
zookeeperConfig = ''
dataDir=${cfg.dataDir}
clientPort=${toString cfg.port}
autopurge.purgeInterval=${toString cfg.purgeInterval}
${cfg.extraConf}
${cfg.servers}
'';
configDir = pkgs.buildEnv {
name = "zookeeper-conf";
paths = [
(pkgs.writeTextDir "zoo.cfg" zookeeperConfig)
(pkgs.writeTextDir "log4j.properties" cfg.logging)
];
};
in {
options.services.zookeeper = {
enable = mkEnableOption (lib.mdDoc "Zookeeper");
port = mkOption {
description = lib.mdDoc "Zookeeper Client port.";
default = 2181;
type = types.port;
};
id = mkOption {
description = lib.mdDoc "Zookeeper ID.";
default = 0;
type = types.int;
};
purgeInterval = mkOption {
description = lib.mdDoc ''
The time interval in hours for which the purge task has to be triggered. Set to a positive integer (1 and above) to enable the auto purging.
'';
default = 1;
type = types.int;
};
extraConf = mkOption {
description = lib.mdDoc "Extra configuration for Zookeeper.";
type = types.lines;
default = ''
initLimit=5
syncLimit=2
tickTime=2000
'';
};
servers = mkOption {
description = lib.mdDoc "All Zookeeper Servers.";
default = "";
type = types.lines;
example = ''
server.0=host0:2888:3888
server.1=host1:2888:3888
server.2=host2:2888:3888
'';
};
logging = mkOption {
description = lib.mdDoc "Zookeeper logging configuration.";
default = ''
zookeeper.root.logger=INFO, CONSOLE
log4j.rootLogger=INFO, CONSOLE
log4j.logger.org.apache.zookeeper.audit.Log4jAuditLogger=INFO, CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[myid:%X{myid}] - %-5p [%t:%C{1}@%L] - %m%n
'';
type = types.lines;
};
dataDir = mkOption {
type = types.path;
default = "/var/lib/zookeeper";
description = lib.mdDoc ''
Data directory for Zookeeper
'';
};
extraCmdLineOptions = mkOption {
description = lib.mdDoc "Extra command line options for the Zookeeper launcher.";
default = [ "-Dcom.sun.management.jmxremote" "-Dcom.sun.management.jmxremote.local.only=true" ];
type = types.listOf types.str;
example = [ "-Djava.net.preferIPv4Stack=true" "-Dcom.sun.management.jmxremote" "-Dcom.sun.management.jmxremote.local.only=true" ];
};
preferIPv4 = mkOption {
type = types.bool;
default = true;
description = lib.mdDoc ''
Add the -Djava.net.preferIPv4Stack=true flag to the Zookeeper server.
'';
};
package = mkOption {
description = lib.mdDoc "The zookeeper package to use";
default = pkgs.zookeeper;
defaultText = literalExpression "pkgs.zookeeper";
type = types.package;
};
jre = mkOption {
description = lib.mdDoc "The JRE with which to run Zookeeper";
default = cfg.package.jre;
defaultText = literalExpression "pkgs.zookeeper.jre";
example = literalExpression "pkgs.jre";
type = types.package;
};
};
config = mkIf cfg.enable {
environment.systemPackages = [cfg.package];
systemd.tmpfiles.rules = [
"d '${cfg.dataDir}' 0700 zookeeper - - -"
"Z '${cfg.dataDir}' 0700 zookeeper - - -"
];
systemd.services.zookeeper = {
description = "Zookeeper Daemon";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig = {
ExecStart = ''
${cfg.jre}/bin/java \
-cp "${cfg.package}/lib/*:${configDir}" \
${escapeShellArgs cfg.extraCmdLineOptions} \
-Dzookeeper.datadir.autocreate=false \
${optionalString cfg.preferIPv4 "-Djava.net.preferIPv4Stack=true"} \
org.apache.zookeeper.server.quorum.QuorumPeerMain \
${configDir}/zoo.cfg
'';
User = "zookeeper";
};
preStart = ''
echo "${toString cfg.id}" > ${cfg.dataDir}/myid
mkdir -p ${cfg.dataDir}/version-2
'';
};
users.users.zookeeper = {
isSystemUser = true;
group = "zookeeper";
description = "Zookeeper daemon user";
home = cfg.dataDir;
};
users.groups.zookeeper = {};
};
}
|
