本文共 3054 字,大约阅读时间需要 10 分钟。
前言:zookeeper部署分单机部署,单机伪集群部署,集群部署。因为资源有限又不想单机部署,于是决定采用单机伪集群部署。由于zookeeper超过半数服务器正常即可提供服务的特性,采取部署3个server的伪集群,下文暂称server1、server2和server3。
https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/
这里笔者下载的是zookeeper-3.3.6
解压之后,分别进入conf目录,可以看到zoo_sample.cfg,log4j.properties和configuration.xsl三个文件。
在该目录下创建一个zoo.cfg文件(也可以直接使用zoo_sample.cfg),配置如下:
# The number of milliseconds of each ticktickTime=2000(2000ms,心跳间隔,也是zookeeper的时间单位)# The number of ticks that the initial synchronization phase can takeinitLimit=10(10*tickTime = 20s,定义初始化的时间限制)# The number of ticks that can pass between sending a request and getting an acknowledgementsyncLimit=5 (5*tickTime = 10s,定义同步的时间限制)# the directory where the snapshot is stored.dataDir=F:\paths\zookeeper\server1\zookeeper-3.3.6\data (自定义数据快照的存放目录,data目录需要自行创建)dataLogDir=F:\paths\zookeeper\server1\zookeeper-3.3.6\log (自定义日志存放目录,log目录需要自行创建)# the port at which the clients will connectclientPort=2181 (zookeeper服务端口)server.1=localhost:2887:3887 (伪集群zookeeper的server1标识)server.2=localhost:2888:3888 (伪集群zookeeper的server2标识)server.3=localhost:2889:3889 (伪集群zookeeper的server3标识)
以上就是zookeeper伪集群中server1的配置文件。同理在其他两个解压路径的conf目录下创建server2和server3的配置文件zoo.cfg。参数区别仅在于dataDir、dataLogDir和clientPort
server2的zoo.cfg
# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial synchronization phase can takeinitLimit=10# The number of ticks that can pass between sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.dataDir=F:\paths\zookeeper\server2\zookeeper-3.3.6\datadataLogDir=F:\paths\zookeeper\server2\zookeeper-3.3.6\log# the port at which the clients will connectclientPort=2182server.1=localhost:2887:3887server.2=localhost:2888:3888server.3=localhost:2889:3889server3的zoo.cfg
# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial synchronization phase can takeinitLimit=10# The number of ticks that can pass between sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.dataDir=F:\paths\zookeeper\server3\zookeeper-3.3.6\datadataLogDir=F:\paths\zookeeper\server3\zookeeper-3.3.6\log# the port at which the clients will connectclientPort=2183server.1=localhost:2887:3887server.2=localhost:2888:3888server.3=localhost:2889:3889
在上个步骤中,我们在dataDir中指定了快照存放目录,切换到各目录下,分别创建一个文件名为myid的文件(没有后缀名)。文件内容为一个整型数。
在server1的data目录下的myid文件,其内容为1。
在server2的data目录下的myid文件,其内容为2。
在server3的data目录下的myid文件,其内容为3。
分别切换到三个解压路径下的bin目录,在cmd上输入zkServer.cmd启动服务,可以同时用三个cmd窗口分别启动三个server,笔者的启动顺序是server1 -> server2 -> server3。启动的过程中是会报错的,信息如下:
这是zookeeper的Leader选举算法的异常信息,当节点没有启动完毕的时候,Leader无法正常进行工作,这种错误信息是可以忽略的,等其他节点启动之后就正常了。