Apache ZooKeeper を使ってみる

このドキュメントの内容は、以下の通りです。

• ダウンロード
• 設定ファイルの準備
• ZooKeepr の起動
• ZooKeeper への接続

ダウンロード

tar zxfp zookeeper-3.4.2.tar.gz
cd zookeeper-3.4.2

設定ファイルの準備

cp conf/zoo_sample.cfg conf/zoo.cfg

kaworu% grep -v -e '^#' conf/zoo.cfg
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/tmp/zookeeper
clientPort=2181

ZooKeepr の起動

kaworu% bin/zkServer.sh start
JMX enabled by default
Using config: /home/kaworu/tmp/zookeeper/zookeeper-3.4.2/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

ZooKeeper への接続

bin/zkCli.sh -server 127.0.0.1:2181

[zk: 127.0.0.1:2181(CONNECTED) 0] help
ZooKeeper -server host:port cmd args
	connect host:port
	get path [watch]
	ls path [watch]
	set path data [version]
	rmr path
	delquota [-n|-b] path
	quit
	printwatches on|off
	create [-s] [-e] path data acl
	stat path [watch]
	close
	ls2 path [watch]
	history
	listquota path
	setAcl path acl
	getAcl path
	sync path
	redo cmdno
	addauth scheme auth
	delete path [version]
	setquota -n|-b val path

[zk: 127.0.0.1:2181(CONNECTED) 5] ls /
[zookeeper]

[zk: 127.0.0.1:2181(CONNECTED) 6] create /foo.txt test
Created /foo.txt
[zk: 127.0.0.1:2181(CONNECTED) 7] ls /
[foo.txt, zookeeper]

[zk: 127.0.0.1:2181(CONNECTED) 8] get /foo.txt
test
cZxid = 0x2
ctime = Sat Feb 11 21:20:53 JST 2012
mZxid = 0x2
mtime = Sat Feb 11 21:20:53 JST 2012
pZxid = 0x2
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 4
numChildren = 0

[zk: 127.0.0.1:2181(CONNECTED) 9] set /foo.txt test2
cZxid = 0x2
ctime = Sat Feb 11 21:20:53 JST 2012
mZxid = 0x3
mtime = Sat Feb 11 21:24:11 JST 2012
pZxid = 0x2
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 5
numChildren = 0
[zk: 127.0.0.1:2181(CONNECTED) 10] get /foo.txt
test2
cZxid = 0x2
ctime = Sat Feb 11 21:20:53 JST 2012
mZxid = 0x3
mtime = Sat Feb 11 21:24:11 JST 2012
pZxid = 0x2
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 5
numChildren = 0

[zk: 127.0.0.1:2181(CONNECTED) 11] delete /foo.txt
[zk: 127.0.0.1:2181(CONNECTED) 12] ls /
[zookeeper]