Zookeeper

nixos/modules/misc/ids.nix

@@ -147,6 +147,7 @@
       riemann = 137;
       riemanndash = 138;
       radvd = 139;
+      zookeeper = 140;
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 

nixos/modules/module-list.nix

@@ -164,6 +164,7 @@
   ./services/misc/siproxd.nix
   ./services/misc/svnserve.nix
   ./services/misc/synergy.nix
+  ./services/misc/zookeeper.nix
   ./services/monitoring/apcupsd.nix
   ./services/monitoring/dd-agent.nix
   ./services/monitoring/graphite.nix

nixos/modules/services/misc/zookeeper.nix

@@ -0,0 +1,145 @@
+{ 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 = mkOption {
+      description = "Whether to enable Zookeeper.";
+      default = false;
+      type = types.uniq types.bool;
+    };
+
+    port = mkOption {
+      description = "Zookeeper Client port.";
+      default = 2181;
+      type = types.int;
+    };
+
+    id = mkOption {
+      description = "Zookeeper ID.";
+      default = 0;
+      type = types.int;
+    };
+
+    purgeInterval = mkOption {
+      description = ''
+        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 = "Extra configuration for Zookeeper.";
+      type = types.lines;
+      default = ''
+        initLimit=5
+        syncLimit=2
+        tickTime=2000
+      '';
+    };
+
+    servers = mkOption {
+      description = "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 = "Zookeeper logging configuration.";
+      default = ''
+        zookeeper.root.logger=INFO, CONSOLE
+        log4j.rootLogger=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 = ''
+        Data directory for Zookeeper
+      '';
+    };
+
+    extraCmdLineOptions = mkOption {
+      description = "Extra command line options for the Zookeeper launcher.";
+      default = [ "-Dcom.sun.management.jmxremote" "-Dcom.sun.management.jmxremote.local.only=true" ];
+      type = types.listOf types.string;
+      example = [ "-Djava.net.preferIPv4Stack=true" "-Dcom.sun.management.jmxremote" "-Dcom.sun.management.jmxremote.local.only=true" ];
+    };
+
+    preferIPv4 = mkOption {
+      type = types.bool;
+      default = true;
+      description = ''
+        Add the -Djava.net.preferIPv4Stack=true flag to the Zookeeper server.
+      '';
+    };
+
+  };
+
+
+  config = mkIf cfg.enable {
+    systemd.services.zookeeper = {
+      description = "Zookeeper Daemon";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-interfaces.target" ];
+      environment = { ZOOCFGDIR = configDir; };
+      serviceConfig = {
+        ExecStart = ''
+          ${pkgs.jre}/bin/java \
+            -cp "${pkgs.zookeeper}/lib/*:${pkgs.zookeeper}/${pkgs.zookeeper.name}.jar:${configDir}" \
+            ${toString cfg.extraCmdLineOptions} \
+            -Dzookeeper.datadir.autocreate=false \
+            ${optionalString cfg.preferIPv4 "-Djava.net.preferIPv4Stack=true"} \
+            org.apache.zookeeper.server.quorum.QuorumPeerMain \
+            ${configDir}/zoo.cfg
+        '';
+        User = "zookeeper";
+        PermissionsStartOnly = true;
+      };
+      preStart = ''
+        mkdir -m 0700 -p ${cfg.dataDir}
+        if [ "$(id -u)" = 0 ]; then chown zookeeper ${cfg.dataDir}; fi
+        echo "${toString cfg.id}" > ${cfg.dataDir}/myid
+      '';
+    };
+
+    users.extraUsers = singleton {
+      name = "zookeeper";
+      uid = config.ids.uids.zookeeper;
+      description = "Zookeeper daemon user";
+      home = cfg.dataDir;
+    };
+  };
+}

pkgs/servers/zookeeper/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, fetchurl, jre, makeWrapper, bash }:
+
+stdenv.mkDerivation rec {
+	name = "zookeeper-3.4.6";
+
+	src = fetchurl {
+		url = "mirror://apache/zookeeper/${name}/${name}.tar.gz";
+		sha256 = "01b3938547cd620dc4c93efe07c0360411f4a66962a70500b163b59014046994";
+	};
+
+	buildInputs = [ makeWrapper jre ];
+
+	phases = ["unpackPhase" "installPhase"];
+
+	installPhase = ''
+		mkdir -p $out
+		cp -R conf docs lib ${name}.jar $out
+		mkdir -p $out/bin
+		cp -R bin/{zkCli,zkCleanup,zkEnv}.sh $out/bin
+		for i in $out/bin/{zkCli,zkCleanup}.sh; do
+			wrapProgram $i \
+				--set JAVA_HOME "${jre}" \
+				--prefix PATH : "${bash}/bin"
+		done
+                chmod -x $out/bin/zkEnv.sh
+	'';
+
+	meta = with stdenv.lib; {
+		homepage = "http://zookeeper.apache.org";
+		description = "Apache Zookeeper";
+		license = licenses.asl20;
+		maintainers = [ maintainers.nathan-gs ];	
+		platforms = platforms.unix;	
+	};		
+
+}

pkgs/top-level/all-packages.nix

@@ -7086,6 +7086,8 @@ let
 
   xinetd = callPackage ../servers/xinetd { };
 
+  zookeeper = callPackage ../servers/zookeeper { };
+
   xquartz = callPackage ../servers/x11/xquartz { };
   quartz-wm = callPackage ../servers/x11/quartz-wm { stdenv = clangStdenv; };