【zookeeper】linux中编写脚本批量启动zookeeper

实现功能：一键启动、关闭主从端3个节点上的zookeeper，附加查看启动状态

mkdir bin --新建文件夹
cd bin 跳转到bin文件夹里
touch  zookeeperstart.sh --新建一键启动文件
touch  zookeeperstop.sh --新建一键停止文件

zookeeperstart.sh添加内容：

#!/bin/bash
ZOOKEEPER_HOME=/home/hadoop/apache-zookeeper-3.5.5

if [ $ZOOKEEPER_HOME != ""  ]; then
        ZOOCFG=$ZOOKEEPER_HOME/conf/zoo.cfg
        for s in 01 02 03 --循环启动
                do
                        echo "INFO:starting zookeeper on ${s}"
                        ssh hadoop$s "source /etc/profile;$ZOOKEEPER_HOME/bin/zkServer.sh start" --利用ssh登陆对应的节点，执行当前对应启动命令
                        if [ $? != 0 ];
                                then
                                echo "Can not starting zookeeper server on host $s}"
                                exit 1
                        fi
                done
        for s in 01 02 03 --循环查看zookeeper状态
                do
                        echo "INFO:starting zookeeper on ${s}"
                        ssh hadoop$s "source /etc/profile;$ZOOKEEPER_HOME/bin/zkServer.sh status" --显示各节点zookeeper的启动状态
                        if [ $? != 0 ];
                                then
                                echo "Can not starting zookeeper server on host $s}"
                                exit 1
                        fi
                done
fi

zookeeperstopsh添加内容：

#!/bin/bash
ZOOKEEPER_HOME=/home/hadoop/apache-zookeeper-3.5.5
if [ $ZOOKEEPER_HOME != ""  ]; then
        ZOOCFG=$ZOOKEEPER_HOME/conf/zoo.cfg
        for s in 01 02 03
                do
                        echo "INFO:starting zookeeper on ${s}"
                        ssh hadoop$s "source /etc/profile;$ZOOKEEPER_HOME/bin/zkServer.sh stop"
                        if [ $? != 0 ];
                                then
                                echo "Can not starting zookeeper server on host $s}"
                                exit 1
                        fi
                done
fi

启动脚本：

sh zookeeperstart.sh
sh zookeeperstop.sh

例：以我的linux虚拟机上配置zookeeper为例

[hadoop@hadoop01 bin]$ sh zookeeperstop.sh
INFO:starting zookeeper on 01
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
INFO:starting zookeeper on 02
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
INFO:starting zookeeper on 03
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
[hadoop@hadoop01 bin]$ sh zookeeperstart.sh
INFO:starting zookeeper on 01
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
INFO:starting zookeeper on 02
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
INFO:starting zookeeper on 03
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
INFO:starting zookeeper on 01
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
INFO:starting zookeeper on 02
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
INFO:starting zookeeper on 03
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apache-zookeeper-3.5.5/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower

最后，我们可以看见，系统给出的信息表明，有两个follower，一个leader，这是zookeeper的工作原理