zookeeper集群配置学习随笔

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1. 下载并解压zookeeper-3.4.6.tar.gz

2.将conf下的zoo_sample.cfg修改为zoo.cfg

3.修改zoo.cfg

4.按照上面我修改的路径新建文件夹，并在其中创建myid文件，根据上述配置中server.X来修改myid内容为X，例如

ip234的/data/myid的内容为1，ip235的为2

之前没有创建这个文件，一直启不来，错误日志如下

2015-05-05 19:31:18,196 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /home/zookeeper-3.4.6/bin/../conf/zoo.cfg
2015-05-05 19:31:18,199 [myid:] - WARN [main:QuorumPeerConfig@293] - No server failure will be tolerated. You need at least 3 servers.
2015-05-05 19:31:18,199 [myid:] - INFO [main:QuorumPeerConfig@340] - Defaulting to majority quorums
2015-05-05 19:31:18,200 [myid:] - ERROR [main:QuorumPeerMain@85] - Invalid config, exiting abnormally
org.apache.zookeeper.server.quorum.QuorumPeerConfig$ConfigException: Error processing /home/zookeeper-3.4.6/bin/../conf/zoo.cfg
at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:123)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:101)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
Caused by: java.lang.IllegalArgumentException: /home/zookeeper-3.4.6/myid file is missing
at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:350)
at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:119)
... 2 more
Invalid config, exiting abnormally

5.在各个机器上执行./bin/zkServer.sh start，可以执行./bin/zkServer.sh status查看状态，我在刚启动后立刻查看状态会报错，参考这篇文章http://blog.csdn.net/zzu09huixu/article/details/26452947“由于ZooKeeper集群启动的时候，每个结点都试图去连接集群中的其它结点，先启动的肯定连不上后面还没启动的”，等了一会，“集群在选出一个Leader后”，再查看状态是正确的了，如下

6.好了，现在就学到这里了

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