在zookeeper-3.3.6使用分布式安装：

单机版分布式安装

这时需要配置的是conf目录下的zoo.cfg文件：

配置文件内容（这里模拟了5个节点，其中三个节点为participant，而另外两个为observer）：

# 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.
dataDir=/home/qzhong/zookeeper0/data
dataLogDir=/home/qzhong/zookeeper0/log
# the port at which the clients will connect
clientPort=2180

peerType=participant

server.0=127.0.0.1:8880:7770
server.1=127.0.0.1:8881:7771
server.2=127.0.0.1:8882:7772
server.3=127.0.0.1:8883:7773
server.4=127.0.0.1:8884:7774

# 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.
dataDir=/home/qzhong/zookeeper4/data
dataLogDir=/home/qzhong/zookeeper4/log
# the port at which the clients will connect
clientPort=2184

peerType=observer

server.0=127.0.0.1:8880:7770
server.1=127.0.0.1:8881:7771
server.2=127.0.0.1:8882:7772
server.3=127.0.0.1:8883:7773
server.4=127.0.0.1:8884:7774

在单机上运行分布式遇到的问题：

运行客户端能运行正常，但是观看日志文件，会发现日志文件有问题。关于选举实例变量epoch会出现你无法理解的数值（观看这些debug信息，可以通过设置conf/log4j.properties，设置info为debug，这样就能看到这些信息，仔细观看日志文件会发现一些异常在单机版运行分布式zookeeper，这个问题可能跟jvm相关）。

多台计算机上运行分布式zookeeper（切记zookeeper配置数量为奇数，这样才能满足达到quorum的要求，或者在zoo.cfg文件中设置各个zookeeper的组的权重值，而不是只是简单的看数量）

多台计算机上运行zookeeper分布式配置（默认情况下是所有的节点参与leader 选举）：

conf/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.
dataDir=/home/qzhong/zookeeper/data
dataLogDir=/home/qzhong/zookeeper/log
# the port at which the clients will connect
clientPort=2181

#the default case that this server stand for participant

server.0=qzhong:8880:7770
server.1=node27:8880:7770
server.2=node100:8880:7770

关于zookeeper-3.3.6中配置问题和运行问题