ZooKeeper是一个分布式开源框架,提供了协调分布式应用的基本服务,它向外部应用暴露一组通用服务——分布式同步(Distributed Synchronization).命名服务(Naming Service).集群维护(Group Maintenance)等,简化分布式应用协调及其管理的难度,提供高性能的分布式服务。ZooKeeper本身可以以Standalone模式安装运行,不过它的长处在于通过分布式ZooKeeper集群(一个Leader,多个Follower),基于一定的策略来保证ZooKeeper集群的稳定性和可用性,从而实现分布式应用的可靠性。 这里先讲解一下单节点安装(后期会提供集群安装模式),由于直接进行操作,故下面记录详细步骤: ZooKeeper Standalone模式
1.修改操作系统的/etc/hosts 文件中添加 # zookeeper servers (主机IP jeesz-provider-01) [iyunv@cloud ~]# vi /etc/hosts xxx.xxx.xxx.xxx jeesz-provider-01 由于我提前下载了并上传到了我指定的目录:/home/jeesz 3. 解压 zookeeper 安装包 [iyunv@cloud jeesz] tar -zxvf zookeeper-3.4.6.tar.gz 4. 在/home/jeesz/zookeeper-3.4.6 目录下创建以下目录 [iyunv@cloud ~]# cd /home/jeesz/zookeeper-3.4.6 [iyunv@cloud zookeeper-3.4.6]# mkdir data [iyunv@cloud zookeeper-3.4.6]# mkdir logs 5.将 zookeeper-3.4.6/conf 目录下的 zoo_sample.cfg 文件拷贝一份,命名为为zoo.cfg [iyunv@cloud conf]# cp zoo_sample.cfg zoo.cfg 6.修改 zoo.cfg 配置文件 [iyunv@cloud conf]# vi zoo.cfg
# The number of milliseconds of each tick tickTime=2000 # The number of ticks that the initial # synchronization phase can take initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/home/jeesz/zookeeper-3.4.6/data dataLogDir=/home/jeesz/zookeeper-3.4.6/logs # the port at which the clients will connect clientPort=2181 #2888,3888 are election port server.1=jeesz-provider-01:2888:3888 7.在/home/jeesz/zookeeper-3.4.6/data 下创建 myid 文件 编辑 myid 文件,并在对应的 IP 的机器上输入对应的编号。如在 zookeeper 上,myid 文件内容就是 1。如果只在单点上进行安装配置,那么只有一个 server.1。 [iyunv@cloud data]# vi myid 1 8.jeesz 用户下修改 vi /home/jeesz/.bash_profile,增加 zookeeper 配置 [iyunv@cloud ~] vi /home/jeesz/.bash_profile # zookeeper env export ZOOKEEPER_HOME=/home/jeesz/zookeeper-3.4.6 export PATH=$ZOOKEEPER_HOME/bin:$PATH 使配置文件生效 [iyunv@cloud ~]# source /home/jeesz/.bash_profile 9.在防火墙中打开要用到的端口 2181.2888.3888 切换到 root 用户权限,执行以下命令: [iyunv@cloud ~]# chkconfig iptables on [iyunv@cloud ~]# service iptables start 编辑/etc/sysconfig/iptables [iyunv@cloud ~]# vi /etc/sysconfig/iptables 增加以下 3 行: -A INPUT -m state --state NEW -m tcp -p tcp --dport 2181 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 2888 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 3888 -j ACCEPT 重启防火墙: [iyunv@cloud ~] service iptables restart 查看防火墙端口状态: [iyunv@cloud]# service iptables status Table: filter Chain INPUT (policy ACCEPT) num target prot opt source destination 1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 5 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited 6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:8080 7 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2181 8 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2888 9 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:3888
Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT) num target prot opt source destination 10.启动并测试 zookeeper (1) 到/home/jeesz/zookeeper-3.4.6/bin 目录中执行: [iyunv@cloud bin]# zkServer.sh start (2) 输入 jps 命令查看进程: [iyunv@cloud zookeeper-3.4.6]# jps 48064 Jps 47348 QuorumPeerMain 46826 Bootstrap 其中,QuorumPeerMain 是 zookeeper 进程,启动正常 (3) 查看状态: [iyunv@cloud bin]# zkServer.sh status JMX enabled by default Using config: /home/jeesz/zookeeper-3.4.6/bin/../conf/zoo.cfg Mode: standalone (4) 查看 zookeeper 服务输出信息: 由于服务信息输出文件在/home/jeesz/zookeeper-3.4.6/bin/zookeeper.out [iyunv@cloud bin]# tail -f zookeeper.out 2016-02-16 02:20:14,500 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /home/jeesz/zookeeper-3.4.6/bin/../conf/zoo.cfg 2016-02-16 02:20:14,700 [myid:] - ERROR [main:QuorumPeerConfig@289] - Invalid configuration, only one server specified (ignoring) ...... 11.停止 zookeeper 进程 [iyunv@cloud bin]# zkServer.sh stop 12.配置 zookeeper 开机使用 jeesz 用户启动 编辑/etc/rc.local 文件,加入: [iyunv@cloud bin]# vi /etc/rc.local su - jeesz -c '/home/jeesz/zookeeper-3.4.6/bin/zkServer.sh start'
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