整体的搭建十分简单,只需要区别一些各个实例的dataDir
和clientPort
配置信息即可。
整体结构:
➜ ~ tree -L 1 zookeepers
zookeepers
├── data
├── zk.sh
├── zookeeper-3.4.9-2181
├── zookeeper-3.4.9-2182
└── zookeeper-3.4.9-2183
4 directories, 1 file
当前使用的zookeeper版本为3.4.9
,好像默认只能读取conf/zoo.cfg
配置文件,无法在运行时指定。所以,直接将zk复制三份,分别配置。
zookeeper-3.4.9-2181/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.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/Users/lpe234/zookeepers/data/2181
# 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=127.0.0.1:2888:3888
server.2=127.0.0.1:2889:3889
server.3=127.0.0.1:2890:3890
另外两个的配置文件类似,只需要修改一下 dataDir
和clientPort
,另外的server.[myid]
配置是个重点。
dataDir的文件结构如下:
➜ ~ tree -L 2 zookeepers/data
zookeepers/data
├── 2181
│ ├── myid
│ ├── version-2
│ └── zookeeper_server.pid
├── 2182
│ ├── myid
│ ├── version-2
│ └── zookeeper_server.pid
└── 2183
├── myid
├── version-2
└── zookeeper_server.pid
6 directories, 6 files
也就是cfg文件中,server.[myid]
的配置。即是每个server的唯一ID。
# 依次生成即可, 这样才能与cfg配置的信息相对应起来
➜ zookeepers echo 1 > data/2181/myid
➜ zookeepers echo 2 > data/2182/myid
➜ zookeepers echo 3 > data/2183/myid
依次执行启动命令即可。
➜ ~ zookeeper-3.4.9/bin/zkServer.sh -h
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeeper-3.4.9/bin/../conf/zoo.cfg
Usage: zookeeper-3.4.9/bin/zkServer.sh {start|start-foreground|stop|restart|status|upgrade|print-cmd}
zk.sh
#!/usr/bin/env bash
# set -e
case "${1}" in
start)
echo "start"
cd /Users/lpe234/zookeepers/zookeeper-3.4.9-2181 && bin/zkServer.sh start
cd /Users/lpe234/zookeepers/zookeeper-3.4.9-2182 && bin/zkServer.sh start
cd /Users/lpe234/zookeepers/zookeeper-3.4.9-2183 && bin/zkServer.sh start
;;
stop)
echo "stop"
zookeeper-3.4.9-2181/bin/zkServer.sh stop
zookeeper-3.4.9-2182/bin/zkServer.sh stop
zookeeper-3.4.9-2183/bin/zkServer.sh stop
;;
status)
zookeeper-3.4.9-2181/bin/zkServer.sh status
zookeeper-3.4.9-2182/bin/zkServer.sh status
zookeeper-3.4.9-2183/bin/zkServer.sh status
;;
*)
echo "only support {start|status|stop}"
;;
esac
➜ zookeepers ./zk.sh start
start
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeepers/zookeeper-3.4.9-2181/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeepers/zookeeper-3.4.9-2182/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeepers/zookeeper-3.4.9-2183/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
➜ zookeepers ./zk.sh status
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeepers/zookeeper-3.4.9-2181/bin/../conf/zoo.cfg
Mode: follower
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeepers/zookeeper-3.4.9-2182/bin/../conf/zoo.cfg
Mode: leader
ZooKeeper JMX enabled by default
Using config: /Users/lpe234/zookeepers/zookeeper-3.4.9-2183/bin/../conf/zoo.cfg
Mode: follower