一、概述

Cloudera版本（Cloudera’s Distribution Including Apache Hadoop，简称“CDH”），基于Web的用户界面,支持大多数Hadoop组件，包括HDFS、MapReduce、Hive、Pig、 Hbase、Zookeeper、Sqoop,简化了大数据平台的安装、使用难度。

二、安装部署

| 序号 | IP地址 | 主机名 |系统版本|
| -------- | -------- | -------- |
| 1 | 172.20.2.222 | cm-server |centos7.3
| 2 | 172.20.2.203 | hadoop-1 |centos7.3
| 3 | 172.20.2.204 | hadoop-2 |centos7.3
| 4 | 172.20.2.205 | hadoop-3 |centos7.3

2.2.1 基础环境部署

a.修改主机名配置hosts

systemctl stop firewalld
hostnamectl set-hostname  cm-server   #更改个主机名
sed -i 's/SELINUX=enforcing/SELINUX=disable/g' /etc/selinux/config
setenforce 0
cat >>/etc/hosts<<EOF    #添加各个节点hosts解析
172.20.2.222    cm-server
172.20.2.203      hadoop-1
172.20.2.204      hadoop-2
172.20.2.205      hadoop-3
EOF

b.配置cm-server免密钥登录其他节点

ssh-keygen -t rsa     #在cm-server生成密钥对
for num in `seq 1 3`;do ssh-copy-id -i /root/.ssh/id_rsa.pub root@hadoop-$num;done

c.在cm-server安装数据库
在cm-server上安装mariadb，用于后期数据存储

yum install mariadb*
systemctl start mariadb
mysql -uroot password "mysqladmin"
登录数据库后我们采用root登录

e.java环境配置
如果系统有安装java环境卸载干净使用oracle的jdk，此处使用jdk-7u80-linux-x64.rpm,在各节点均配置java环境

rpm -ivh jdk-7u80-linux-x64.rpm
cat >/etc/profile.d/java.sh<<EOF
export JAVA_HOME=/usr/java/jdk1.8.0_121
export CLASSPATH=.:\$JAVA_HOME/jre/lib/rt.jar:\$JAVA_HOME/lib/dt.jar:\$JAVA_HOME/lib/tools.jar 
export PATH=\$PATH:\$JAVA_HOME/bin
EOF
source /etc/profile.d/java.sh

f.配置各节点服务器需求

sysctl -w vm.swappiness=10
echo "vm.swappiness=10" >>/etc/sysctl.conf
echo never > /sys/kernel/mm/transparent_hugepage/defrag
echo never > /sys/kernel/mm/transparent_hugepage/enabled

2.2.2 Cloudera Manager安装

a.下载解压相关软件包

mkdir /software && cd /software
wget -c https://archive.cloudera.com/cm5/cm/5/cloudera-manager-centos7-cm5.14.1_x86_64.tar.gz 
wget -c http://archive.cloudera.com/cdh5/parcels/5.14.2/CDH-5.14.2-1.cdh5.14.2.p0.3-el7.parcel
wget -c http://archive.cloudera.com/cdh5/parcels/5.14.2/CDH-5.14.2-1.cdh5.14.2.p0.3-el7.parcel.sha1 -O CDH-5.14.2-1.cdh5.14.2.p0.3-el7.parcel.sha
wget -c http://archive.cloudera.com/cdh5/parcels/5.14.2/manifest.json
wget -c https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.46.zip
tar -zxvf cloudera-manager-centos7-cm5.14.1_x86_64.tar.gz -C /opt/   #解压cm包
unzip mysql-connector-java-5.1.46.zip  #解压java-mysql连接jar包
cp mysql-connector-java-5.1.46/mysql-connector-java-5.1.46-bin.jar /opt/cm-5.14.1/share/cmf/lib/    #将jar包复制到cm的lib目录下
cp mysql-connector-java-5.1.46/mysql-connector-java-5.1.46-bin.jar 

b.创建用户及初始化数据库

useradd --system --home=/opt/cm-5.14.1/run/cloudera-scm-server/ --no-create-home --shell=/bin/false --comment "Cloudera SCM User" cloudera-scm     #在各个节点均创建用户
vim /opt/cm-5.14.1/etc/cloudera-scm-agent/config.ini将其中的server_host=cm-server     #指向cm-server
usage: /opt/cm-5.14.1/share/cmf/schema/scm_prepare_database.sh [options] (postgresql|mysql|oracle) database username [password]    #使用选项
/opt/cm-5.14.1/share/cmf/schema/scm_prepare_database.sh mysql cmdb -h"cm-server" -uroot -pmysqladmin --scm-host cm-server scm scm scm

c.将文件将cm-server修改完成的文件分发到其他各节点

for i in `seq 1 3`;do scp -r /opt/cm-5.14.1 hadoop-$i:/opt/;done

d.创建本地源

mv CDH-5.14.2-1.cdh5.14.2.p0.3-el7.parcel* manifest.json /opt/cloudera/parcel-repo/

e.启动服务
在cm-server启动server和agent服务，在其他节点启动agent服务

/opt/cm-5.14.1/etc/init.d/cloudera-scm-server start
/opt/cm-5.14.1/etc/init.d/cloudera-scm-agent start

2.2.2 Cloudera Manager的web界面配置

服务器均启动后，可以浏览器访问cm-server的7180端口,用户名/密码为admin/admin

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接受协议继续

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勾选管理的主机继续操作

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选择CDH-5.14版本

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parcel安装

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群集设置（选择安装的服务）

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集群安装

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完成安装

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后期可添加服务

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