Zookeeper 单实例安装

Zookeeper 通常都是采用集群方式安装, 所谓集群就是由一个一个的单实例zookeeper单实例串联起来的, 因此单实例安装是非常必要的.而且在学习时, 一个zookeeper实例就够用了. Zookeeper 依赖于Java 环境.

zookeeper 重要配置/脚本:

1. 安装准备

• 安装java 环境
• 下载zookeeper包: zookeeper-3.4.10.tar.gz

2. 安装

zookeeper 安装是比较简单的, 我们对安装目录做一下简单的规划, 这些目录需要手动创建

2.1 安装zookeeper

• zookeeper 安装是非常简单的, 和tomcat类似, 直接解压即可.

[admin@localhost zookeeper]$ tar -zxf zookeeper-3.4.10.tar.gz

2.2 创建配置文件zoo.cfg

• zookeeper 默认使用配置文件 conf/zoo.cfg , 但是conf目录下默认是没有此目录的, 因此需要新建.直接复制conf 目录下的zoo_aample.cfg 文件就行

[admin@localhost zookeeper] cd /opt/app/zookeeper/zookeeper-3.4.10/conf
[admin@localhost zookeeper-3.4.10]$ cp zoo_sample.cfg zoo.cfg

2.3 编辑配置文件内容

#心跳时间
tickTime=2000
#集群中follwer节点与leader 节点初始化连接超时时间,单位为tickTime
initLimit=10
#集群中follwer节点与leader节点之前请求-响应超时时间,单位为tickTime
syncLimit=5
#数据存放目录: 记录当前的版本号和数据快照
dataDir=/var/data/zookeeper
#数据操作日志存放目录
dataLogDir=/var/data/zookeeper/datalogs
#客户端连接端口
clientPort=2181

2.3 修改启动日志文件

• zookeeper 启动时,默认会在你执行命令的当前目录创建一个zookeeper.out 日志文件, 而且zoo.cfg 的配置文件中并不能修改zookeeper启动日志文件位置, 只能通过修改 bin/zkEnv.sh 脚本中的设置
• 将 bin/zkEnv.sh 中第一行添加变量 ZOO_LOG_DIR 值为: /var/logs/zookeeper/zklogs

ZOO_LOG_DIR=/var/logs/zookeeper/zklogs

2.4 修改log4j 配置

• zookeeper 默认使用log4j 打印日志, log4j 的配置文件在conf 目录下, 可以按需修改log4j 的日志打印信息

3. zookeeper 启动管理

zookeeper 的相关命令都在bin 目录下, 启动停止是通过zkServer.sh 来完成

• zkServer.sh: zookeeper 启动,停止,查看状态脚本
• zkCli.sh : zookeeper 客户端连接工具
• zkEnv.sh : zookeeper 环境设置脚本
• zkCleanup.sh : 清理老的事务和快照脚本

3.1 启动zookeeper

• 命令: ./zkServer.sh start

[admin@localhost bin]$ ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

3.2 查看zookeeper状态

• 命令: ./zkServer.sh status

[admin@localhost bin]$ ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: standalone

3.3 查看zookeeper 进程

• 通过ps 查看进程: psgrep zookeeper
• 通过jps 查看进程: jps -l | grep zookeeper

[admin@gds bin]$ psgrep zookeeper
[1] admin     8845     1  1 10:14 pts/2    00:00:00 /opt/app/jdk/jdk1.6.0_31/bin/java -Dzookeeper.log.dir=/var/logs/zookeeper/zklogs -Dzookeeper.root.logger=INFO,CONSOLE -cp /home/admin/zookeeper/zookeeper-3.4.10/bin/../build/classes:/home/admin/zookeeper/zookeeper-3.4.10/bin/../build/lib/*.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/slf4j-api-1.6.1.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/netty-3.10.5.Final.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/log4j-1.2.16.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/jline-0.9.94.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../zookeeper-3.4.10.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../src/java/lib/*.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../conf:/opt/app/jdk/jdk1.6.0_31/lib -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
[admin@gds bin]$ jps -l | grep zookeeper
8845 org.apache.zookeeper.server.quorum.QuorumPeerMain

3.4 重启zookeeper

• 命令: ./zkServer.sh restart

[admin@localhost bin]$ ./zkServer.sh restart
ZooKeeper JMX enabled by default
Using config: /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
ZooKeeper JMX enabled by default
Using config: /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
ZooKeeper JMX enabled by default
Using config: /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

3.5 停止zookeeper

• 命令: ./zkServer.sh stop

[admin@localhost bin]$ ./zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /home/admin/zookeeper/zookeeper-3.4.10/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED

4. 客户端连接

• zookeeper提供了客户端连接脚本 zkCli.sh, Ctrl+C 退出
• zkCli.sh 默认连接本地 2181 端口
• 如果其它服务器要访问的话, 需要更新防火墙策略, 释放端口号2181

[admin@localhost bin]$ ./zkCli.sh 
Connecting to localhost:2181
2017-07-18 10:34:18,378 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
2017-07-18 10:34:18,380 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=localhost.localdomain
2017-07-18 10:34:18,380 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.6.0_31
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Sun Microsystems Inc.
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/opt/app/jdk/jdk1.6.0_31/jre
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/home/admin/zookeeper/zookeeper-3.4.10/bin/../build/classes:/home/admin/zookeeper/zookeeper-3.4.10/bin/../build/lib/*.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/slf4j-api-1.6.1.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/netty-3.10.5.Final.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/log4j-1.2.16.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../lib/jline-0.9.94.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../zookeeper-3.4.10.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../src/java/lib/*.jar:/home/admin/zookeeper/zookeeper-3.4.10/bin/../conf:/opt/app/jdk/jdk1.6.0_31/lib
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/opt/app/jdk/jdk1.6.0_31/jre/lib/amd64/server:/opt/app/jdk/jdk1.6.0_31/jre/lib/amd64:/opt/app/jdk/jdk1.6.0_31/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=2.6.32-642.el6.x86_64
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=admin
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/home/admin
2017-07-18 10:34:18,381 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/home/admin/zookeeper/zookeeper-3.4.10/bin
2017-07-18 10:34:18,382 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@27ce2dd4
Welcome to ZooKeeper!
2017-07-18 10:34:18,396 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181. Will not attempt to authenticate using SASL (java.lang.SecurityException: Unable to locate a login configuration)
JLine support is enabled
2017-07-18 10:34:18,399 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/0:0:0:0:0:0:0:1:2181, initiating session
[zk: localhost:2181(CONNECTING) 0] 2017-07-18 10:34:18,436 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x15d5380f6e10002, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null

[zk: localhost: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: localhost:2181(CONNECTED) 1] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 2] get /zookeeper

cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1