之前上上篇说了一下 zookeeper 的搭建及简单使用（见：https://blog.csdn.net/a15835774652/article/details/80620038）今天也搭建了下 zookeeper伪集群 记录下
为什么叫伪集群
个人理解 正常的集群应该是2n+1台服务器进行交互 伪集群 是在一个 台机器上 启动不同端口的实例达到集群的目的 所以称为伪集群了吧
步骤和搭建单个zookeeper差不多 之前只有 现在有2n+1个 这里选用3个
我的服务器上开发目录下文件
1.新建文件夹 zookeeper-clusters
2将之前解压好的 zookeeper-3.4.12 复制到 zookeeper-clusters下
3个文件夹 zookeeper-server1 zookeeper-server2 zookeeper-server3
仅仅复制文件 而不赋值文件夹 格式 cp -Rf 原路径/ 目的路径/
在develope 目录下分别执行 命令 cp -Rf ./zookeeper-3.4.12 /usr/local/develope/zookeeper-clusters/zookeeper-server1
cp -Rf ./zookeeper-3.4.12 /usr/local/develope/zookeeper-clusters/zookeeper-server2
cp -Rf ./zookeeper-3.4.12 /usr/local/develope/zookeeper-clusters/zookeeper-server3
集群配置1.分别修改这3个目录下 zoo.cfg配置文件
这里 贴出 这3个文件 的配置 （分别设置3个不同端口 来启动）
zookeeper-server1配置
（注意修改复制后的 data目录 log目录 ）
# 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=/usr/local/develope/zookeeper-clusters/zookeeper-server1/data
#log dir
dataLogDir=/usr/local/develope/zookeeper-clusters/zookeeper-server1/logs
# 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
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890
zookeeper-server2配置
（注意修改复制后的 data目录 log目录 ）
# 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=/usr/local/develope/zookeeper-clusters/zookeeper-server2/data
#log dir
dataLogDir=/usr/local/develope/zookeeper-clusters/zookeeper-server2/logs
# the port at which the clients will connect
clientPort=2182
# 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
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890
zookeeper-server3配置
（注意修改复制后的 data目录 log目录 ）
# 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=/usr/local/develope/zookeeper-clusters/zookeeper-server3/data
#log dir
dataLogDir=/usr/local/develope/zookeeper-clusters/zookeeper-server3/logs
# the port at which the clients will connect
clientPort=2183
# 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
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890
集群配置2.在zookeeper-server1，zookeeper-server2，zookeeper-server3创建data ,logs 目录 并在data目录下添加 myid文件
echo "1" > /usr/local/develope/zookeeper-clusters/zookeeper-server1/data/myid
echo "2" > /usr/local/develope/zookeeper-clusters/zookeeper-server2/data/myid
echo "3" > /usr/local/develope/zookeeper-clusters/zookeeper-server3/data/myid
都启动成功后 在3个集群任何一个 bin目录下 启动 客户端 测试连接
如图连接ok
在看下每个 zookeeper服务的状态
如图 有一个leader 2个follerer 搭建成功
基本使用见上上篇文章 zookeeper搭建及基本使用