# 其中mini03、mini04、mini06、mini07状态如下
[yun@mini03 bin]$ ./zkServer.sh status
JMX enabled by default
Using config: /app/zookeeper/bin/../conf/zoo.cfg
Mode: follower
# 其中mini05 状态如下
[yun@mini05 bin]$ ./zkServer.sh status
JMX enabled by default
Using config: /app/zookeeper/bin/../conf/zoo.cfg
Mode: leader
PS：4个follower 1个leader
7. Hadoop部署与配置修改
注意：每台机器的Hadoop以及配置相同
7.1. 部署
[yun@mini01 software]$ pwd
/app/software
[yun@mini01 software]$ ll
total 194152
-rw-r--r-- 1 yun yun 198811365 Jun 8 16:36 CentOS-7.4_hadoop-2.7.6.tar.gz
[yun@mini01 software]$ tar xf CentOS-7.4_hadoop-2.7.6.tar.gz
[yun@mini01 software]$ mv hadoop-2.7.6/ /app/
[yun@mini01 software]$ cd
[yun@mini01 ~]$ ln -s hadoop-2.7.6/ hadoop
[yun@mini01 ~]$ ll
total 4
lrwxrwxrwx 1 yun yun 13 Jun 9 16:21 hadoop -> hadoop-2.7.6/
drwxr-xr-x 9 yun yun 149 Jun 8 16:36 hadoop-2.7.6
lrwxrwxrwx 1 yun yun 12 May 26 11:18 jdk -> jdk1.8.0_112
drwxr-xr-x 8 yun yun 255 Sep 23 2016 jdk1.8.0_112
7.2. 环境变量
[root@mini01 profile.d]# pwd
/etc/profile.d
[root@mini01 profile.d]# vim hadoop.sh
export HADOOP_HOME="/app/hadoop"
export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH
[root@mini01 profile.d]# source /etc/profile # 生效
7.3. core-site.xml
[yun@mini01 hadoop]$ pwd
/app/hadoop/etc/hadoop
[yun@mini01 hadoop]$ vim core-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/configuration.xsl"?>
<!--
……………………
-->
<!-- Put site-specific property overrides in this file. -->
<configuration>
<!-- 指定hdfs的nameservice为bi -->
<property>
<name>fs.defaultFS</name>
<value>hdfs://bi/</value>
</property>
<!-- 指定hadoop临时目录 -->
<property>
<name>hadoop.tmp.dir</name>
<value>/app/hadoop/tmp</value>
</property>
<!-- 指定zookeeper地址 -->
<property>
<name>ha.zookeeper.quorum</name>
<value>mini03:2181,mini04:2181,mini05:2181,mini06:2181,mini07:2181</value>
</property>
</configuration>
7.4. hdfs-site.xml
[yun@mini01 hadoop]$ pwd
/app/hadoop/etc/hadoop
[yun@mini01 hadoop]$ vim hdfs-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/configuration.xsl"?>
<!--
……………………
-->
<!-- Put site-specific property overrides in this file. -->
<configuration>
<!--指定hdfs的nameservice为bi，需要和core-site.xml中的保持一致 -->
<property>
<name>dfs.nameservices</name>
<value>bi</value>
</property>
<!-- bi下面有两个NameNode，分别是nn1，nn2 -->
<property>
<name>dfs.ha.namenodes.bi</name>
<value>nn1,nn2</value>
</property>
<!-- nn1的RPC通信地址 -->
<property>
<name>dfs.namenode.rpc-address.bi.nn1</name>
<value>mini01:9000</value>
</property>
<!-- nn1的http通信地址 -->
<property>
<name>dfs.namenode.http-address.bi.nn1</name>
<value>mini01:50070</value>
</property>
<!-- nn2的RPC通信地址 -->
<property>
<name>dfs.namenode.rpc-address.bi.nn2</name>
<value>mini02:9000</value>
</property>
<!-- nn2的http通信地址 -->
<property>
<name>dfs.namenode.http-address.bi.nn2</name>
<value>mini02:50070</value>
</property>
<!-- 指定NameNode的edits元数据在JournalNode上的存放位置 -->
<property>
<name>dfs.namenode.shared.edits.dir</name>
<value>qjournal://mini05:8485;mini06:8485;mini07:8485/bi</value>
</property>