摘要
Zookeeper运行需要java环境，需要安装jdk。
安装openjdk
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| yum install java-1.8.0-openjdk
yum install java-1.8.0-openjdk-devel
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下载最新稳定版的 Zookeeper
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| wget https://www.apache.org/dist/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz
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解压
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| tar zxf zookeeper-3.4.14.tar.gz
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将解压文件夹移动至/usr/local/zookeeper
自己想放哪放哪
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| mv zookeeper-3.4.14 /usr/local/zookeeper
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配置
进入zookeeper的conf目录下，找到zoo_sample.cfg文件。将zoo_sample.cfg文件备份，并重命名为zoo.cfg。修改配置
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| clientPort=2181
dataLogDir=/usr/local/zookeeper/logs
dataDir=/usr/local/zookeeper/data
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
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修改一下zkEnv.sh脚本，zk启动后会有一个zookeeper.out文件，这个文件随着时间会越来越大，默认会在执行zkServer.sh的位置生成，所以我们要修改为指定路径。
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| if [ "x${ZOO_LOG_DIR}" = "x" ]
then
ZOO_LOG_DIR="$ZOOBINDIR/../log"
fi
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启动
进入bin目录，执行启动命令
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| sh zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/zookeeper/zookeeper-3.4.14/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
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Zookeeper启动完成。
添加到systemctl
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| vi /usr/lib/systemd/system/zookeeper.service
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| [Unit]
Description=Zookeeper Service
After=network.target
[Service]
Type=forking
Environment=JAVA_HOME=/usr/local/java/
ExecStart=/usr/local/zookeeper/bin/zkServer.sh start
ExecStop=/usr/local/zookeeper/bin/zkServer.sh stop
ExecReload=/usr/local/zookeeper/bin/zkServer.sh restart
PIDFile=/tmp/zookeeper/zookeeper_server.pid
[Install]
WantedBy=multi-user.target
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