【README】在 192.168.163.201 机器上 启动zk ，并查看zk 这台； 即 集群只有2台机器， 201 202

--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=/opt/module/zookeeper-3.4.10/zkdata
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
# cluster conf
server.1=192.168.163.201:2888:3888
server.2=192.168.163.202:2888:3888

【1】报错现场 

在201上启动zk，如下： 

[root@localhost zookeeper-3.4.10]# ./bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@localhost zookeeper-3.4.10]# 
[root@localhost zookeeper-3.4.10]# 
[root@localhost zookeeper-3.4.10]# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.

【2】解决方法

第一步： 查看 zookeeper.out 输出日志，如下：

Cannot open channel to 2 at election address /192.168.163.202:3888

 

第2步： 很明显，意识到 202 这台机器的 zk没有启动， 

启动 202， 如下：

经过查看 status， 202 是leader 

第3步， 我们查看201 的zk 状态（这里无需再次启动，因为201已经启动了），201是个 follower 

bingo

 

小结：解决该问题的方法是在 查看zk启动的日志文件， zookeeper.out 文件；