分布式群起zookeeper脚本、群起HDFS与YARN脚本、查看集群jpsall脚本、shell群起脚本代码、Linux群起服务、群起集群后立即关闭安全模式

一下是尚硅谷的util.sh脚本代码：

注意：用户名、主机名、文件目录名根据自己的来

群起zookeeper脚本代码

echo "================     正在启动Zookeeper               ==========="
for i in atguigu@hadoop102 atguigu@hadoop103 atguigu@hadoop104
do
	ssh $i '/opt/module/zookeeper-3.4.10/bin/zkServer.sh start'
done

群起所有节点服务的zookeeper、HDFS、YARN、JobHistoryServer脚本代码

#!/bin/bash
echo "================     开始启动所有节点服务            ==========="
echo "================     正在启动Zookeeper               ==========="
for i in atguigu@hadoop102 atguigu@hadoop103 atguigu@hadoop104
do
	ssh $i '/opt/module/zookeeper-3.4.10/bin/zkServer.sh start'
done
echo "================     正在启动HDFS                    ==========="
ssh atguigu@hadoop102 '/opt/module/hadoop-2.7.2/sbin/start-dfs.sh'
echo "================     正在启动YARN                    ==========="
ssh atguigu@hadoop103 '/opt/module/hadoop-2.7.2/sbin/start-yarn.sh'
echo "================     正在开启JobHistoryServer        ==========="
ssh atguigu@hadoop102 '/opt/module/hadoop-2.7.2/sbin/mr-jobhistory-daemon.sh start historyserver'

查看集群jps代码

#!/bin/bash
for i in atguigu@hadoop102 atguigu@hadoop103 atguigu@hadoop104
do
	echo "===========        $i        ==========="
	ssh $i '/opt/module/jdk1.8.0_144/bin/jps'
done

实战演练

1.进入/bin目录

[atguigu@hadoop102 bin]$ cd /bin/
[atguigu@hadoop102 bin]$ pwd
/bin

2.创建startall群起命令

[atguigu@hadoop102 bin]$ sudo touch startall
[sudo] password for atguigu: 
[atguigu@hadoop102 bin]$ ll startall 
-rw-r--r--. 1 root root 0 8月  25 22:10 startall

3.给命令脚本添加权限

[atguigu@hadoop102 bin]$ sudo chmod +wrx startall 

4.编辑脚本
我的jobHistoryServer在hadoop104节点上

[atguigu@hadoop102 bin]$ sudo vim startall
#!/bin/bash
echo "================     开始启动所有节点服务            ==========="
echo "================     正在启动Zookeeper               ==========="
for i in atguigu@hadoop102 atguigu@hadoop103 atguigu@hadoop104
do
	ssh $i '/opt/module/zookeeper-3.4.10/bin/zkServer.sh start'
done
echo "================     正在启动HDFS                    ==========="
ssh atguigu@hadoop102 '/opt/module/hadoop-2.7.2/sbin/start-dfs.sh'
echo "================     正在启动YARN                    ==========="
ssh atguigu@hadoop103 '/opt/module/hadoop-2.7.2/sbin/start-yarn.sh'
echo "================     正在开启JobHistoryServer        ==========="
ssh atguigu@hadoop104 '/opt/module/hadoop-2.7.2/sbin/mr-jobhistory-daemon.sh start historyserver'
echo "===========        查看集群的jps        ==========="
for i in atguigu@hadoop102 atguigu@hadoop103 atguigu@hadoop104
do
	echo "===========        $i        ==========="
	ssh $i '/opt/module/jdk1.8.0_144/bin/jps'
done

5.执行脚本

[atguigu@hadoop102 bin]$ startall 

6.使用xsync分发脚本分发startall命令到其他节点并验证

[atguigu@hadoop102 bin]$ sudo xsync startall 

集群分发脚本命令xsync说明：https://blog.csdn.net/qq_43265673/article/details/99682653

配置关闭所有服务命令stopall（名字自己取）仅需将以上脚本的start改为stop即可
其他的集群组件群起代码也可以根据上面模板编写。

补充：启动集群后立即关闭安全模式
在startall文件末尾追加如下命令即可：

echo "===========       启动后立即关闭集群安全模式        ==========="
hadoop dfsadmin -safemode leave