ZooKeeper 环境

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kafka 环境依赖 zookeeper 环境，本文简单记录一下 zookeeper 环境搭建。

apache-zookeeper-3.7.0-bin.tar.gz: https://zookeeper.apache.org/releases.html

1.1 文件校验

https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz.sha512

$ Get-FileHash apache-zookeeper-3.7.0-bin.tar.gz -Algorithm SHA512 | Format-List

Algorithm : SHA512
Hash      : 64E2701C019ED46F45F4D53B2C5EAEAF7CF48C342BBAFA032A0819D527FC77CAEBFADA6BDAD34E5171E6D838F40B16C95B62CE378B53DFC827AF2D60CEC0B17C
Path      : D:\下载2\linux-downloads\apache-zookeeper-3.7.0-bin.tar.gz

2 配置文件

./conf/zoo.cfg

# The number of milliseconds of each tick 服务器心跳时间，单位为 ms
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take 投票选举新 leader 的初始化时间
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement leader 与 fellower 心跳检测最大容忍时间，响应超过 syncLimit * tickTime，leader 认为 fellower “死掉”，剔除 fellower
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes. 数据目录
dataDir=/tmp/zookeeper
# 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

3 standalone mode（单机模式）

环境依赖 JAVA_HOME。

# 解压
tar zxvf apache-zookeeper-3.7.0-bin.tar.gz
cd apache-zookeeper-3.7.0-bin

# 复制配置文件
$ cp conf/zoo_sample.cfg conf/zoo.cfg

# 启动服务
$ ./bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/admin0/Downloads/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

# 停止服务
$ ./bin/zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /home/admin0/Downloads/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED

# 查看状态
$ ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/admin0/Downloads/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: standalone

4 replicated mode（集群模式）

官方文档: https://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_InstallingSingleMode

/etc/hosts

192.168.3.19 localhost.ubuntu0.com
192.168.3.20 localhost.ubuntu1.com
192.168.3.21 localhost.ubuntu2.com

./conf/zoo.cfg

server.0=localhost.ubuntu0.com:2888:3888
server.1=localhost.ubuntu1.com:2888:3888
server.2=localhost.ubuntu2.com:2888:3888

/tmp/zookeeper/myid

# localhost.ubuntu0.com
0
# localhost.ubuntu1.com
1
# localhost.ubuntu2.com
2

# localhost.ubuntu0.com
$ ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/admin0/Downloads/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower

# localhost.ubuntu1.com
$ ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/admin0/Downloads/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader

# localhost.ubuntu2.com
$ ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/admin0/Downloads/apache-zookeeper-3.7.0-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower

运行截图：

（全文完）