大数据之—CDH搭建
前言
1、CDH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。
由于组件齐全，安装维护方便，国内已经有不少公司部署了CDH大数据平台，此处选择CDH 6.3版本。
2、安装CDH前准备
推荐硬件配置： 每台主机：CPU4核、内存8G、硬盘500G
主机配置:
192.168.8.137 node1
192.168.8.138 node2
192.168.8.139 node3
软件版本：
- 操作系统：CentOS release 7.8 (Final) 64位
- JDK：1.8
- 数据库：MySQL 5.6.49
- JDBC：MySQL Connector Java 5.1.38
- Cloudera Manager： 6.3.1
- CDH：6.3.1
3、配置
- 配置
# node1
echo "HOSTNAME=node1" >> /etc/sysconfig/network
# node2
echo "HOSTNAME=node2" >> /etc/sysconfig/network
# node3
echo "HOSTNAME=node3" >> /etc/sysconfig/network
- 配置
所有节点关闭防火墙
systemctl disable firewalld;systemctl stop firewalld
- 配置
所有节点配置SeLinux
vim /etc/selinux/config
# 修改内容
SELINUX=permissive
同步配置：xsync /etc/selinux/config
- 配置
所有节点NTP时间服务配置
yum install ntp
systemctl start ntpd
systemctl enable ntpd
- 配置
所有节点安装python
CDH要求python 2.7版本，此处系统自带，略过
- 配置
所有节点修改Linux swappiness参数
为了避免服务器使用swap功能而影响服务器性能，一般都会把vm.swappiness修改为0（cloudera建议10以下）
cd /usr/lib/tuned/ && grep "vm.swappiness" * -R
# 将以下三个文件的 vm.swappiness 的值全部修改为0
vim /usr/lib/tuned/latency-performance/tuned.conf
vim /usr/lib/tuned/throughput-performance/tuned.conf
vim /usr/lib/tuned/virtual-guest/tuned.conf
同步配置：xsync /usr/lib/tuned/latency-performance/tuned.conf /usr/lib/tuned/throughput-performance/tuned.conf /usr/lib/tuned/virtual-guest/tuned.conf
- 配置
所有节点禁用透明页
vim /etc/rc.local
# 追加以下内容
echo never > /sys/kernel/mm/transparent_hugepage/defrag
echo never > /sys/kernel/mm/transparent_hugepage/enabled
此项配置无法同步
- 配置
所有节点安装JDK，已经安装过并且配置过环境变量的就不用重新安装了
cloudera-scm-server一直启动失败的解决办法：https://blog.csdn.net/a544258023/article/details/107856387
jdk1.8改成自己的jdk安装目录
mkdir -p /usr/java
ln -s /opt/jdk/java8 /usr/java/default
- 配置
主节点：安装mysql数据库
此处安装MySQL5.6版本，安装步骤略过
- 配置
主节点安装mysql
docker run -d -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=root mysql:5.7.41
docker exec -it mysql bash
# 创建CDH源数据库、用户、amon服务的数据库
mysql -uroot -proot
create database cmf DEFAULT CHARACTER SET utf8;
create database amon DEFAULT CHARACTER SET utf8;
grant all on cmf.* TO 'cmf'@'%' IDENTIFIED BY 'www.research.com';
grant all on amon.* TO 'amon'@'%' IDENTIFIED BY 'www.research.com';
flush privileges;
4、下载安装包
软件已经存到网盘中了，需要的话可自取
链接：https://pan.baidu.com/s/1UH50Uweyi7yg6bV7dl02mQ
提取码：nx7p
主节点安装MySQL的jdbc驱动
mkdir -p /opt/cdh/soft # cdh的资源上传目录
mkdir -p /usr/share/java && mv /opt/cdh/soft/mysql-connector-java-5.1.47.jar /usr/share/java/mysql-connector-java.jar && cd /usr/share/java && ll
部署CDH
mkdir -p /opt/cdh/cloudera-manager && cd /opt/cdh/cloudera-manager
tar -zvxf /opt/cdh/soft/cm6.3.1-redhat7.tar.gz -C /opt/cdh/cloudera-manager
同步资源：xsync /opt/cdh
所有节点都要安装的内容
# 有顺序要求，顺序不对启动就会导致文件没有权限，主要是某一个包在安装的时候会自动创建cloudera-scm用户与cloudera-scm组
rpm -ivh /opt/cdh/cloudera-manager/cm6.3.1/RPMS/x86_64/cloudera-manager-daemons-6.3.1-1466458.el7.x86_64.rpm --nodeps --force
rpm -ivh /opt/cdh/cloudera-manager/cm6.3.1/RPMS/x86_64/cloudera-manager-agent-6.3.1-1466458.el7.x86_64.rpm --nodeps --force
只有主节点node1上安装的内容
rpm -ivh /opt/cdh/cloudera-manager/cm6.3.1/RPMS/x86_64/cloudera-manager-server-6.3.1-1466458.el7.x86_64.rpm --nodeps --force
所有节点 修改agent配置，指向server节点node1
sed -i "s/server_host=localhost/server_host=此处修改为主节点的ip/g" /etc/cloudera-scm-agent/config.ini
例如：sed -i "s/server_host=localhost/server_host=192.168.8.137/g" /etc/cloudera-scm-agent/config.ini
主节点node1修改server配置
chmod 777 /etc/cloudera-scm-server/db.properties && vim /etc/cloudera-scm-server/db.properties
# Copyright (c) 2012 Cloudera, Inc. All rights reserved.
#
# This file describes the database connection.
#
# The database type
# Currently 'mysql', 'postgresql' and 'oracle' are valid databases.
# com.cloudera.cmf.db.type=mysql
# The database host
# If a non standard port is needed, use 'hostname:port'
#com.cloudera.cmf.db.host=localhost
# The database name
#com.cloudera.cmf.db.name=cmf
# The database user
#com.cloudera.cmf.db.user=cmf
# The database user's password
#com.cloudera.cmf.db.password=
# The db setup type
# After fresh install it is set to INIT
# and will be changed post config.
# If scm-server uses Embedded DB then it is set to EMBEDDED
# If scm-server uses External DB then it is set to EXTERNAL
# com.cloudera.cmf.db.setupType=INIT
com.cloudera.cmf.db.type=mysql
com.cloudera.cmf.db.host=node1
com.cloudera.cmf.db.name=cmf
com.cloudera.cmf.db.user=cmf
com.cloudera.cmf.db.password=www.research.com
com.cloudera.cmf.db.setupType=EXTERNAL
主节点部署离线parcel源
mkdir -p /var/www/html/cdh6_parcel
cp /opt/cdh/soft/CDH-6.3.1-1.cdh6.3.1.p0.1470567-el7.parcel /var/www/html/cdh6_parcel/ && cp /opt/cdh/soft/CDH-6.3.1-1.cdh6.3.1.p0.1470567-el7.parcel.sha1 /var/www/html/cdh6_parcel/CDH-6.3.1-1.cdh6.3.1.p0.1470567-el7.parcel.sha && cp /opt/cdh/soft/manifest.json /var/www/html/cdh6_parcel/ && ll /var/www/html/cdh6_parcel/ && systemctl start httpd
页面访问：http://node1/cdh6_parcel/
启动主节点
# 启动
systemctl start cloudera-scm-server
systemctl stop cloudera-scm-server
systemctl status cloudera-scm-server
# 查看文件夹（没有日志文件是因为安装顺序错了）
ll /var/log/cloudera-scm-server/
# 查看启动日志
tailf /var/log/cloudera-scm-server/cloudera-scm-server.log
journalctl -f -u cloudera-scm-server.service
所有节点启动
systemctl start cloudera-scm-agent
systemctl stop cloudera-scm-agent
systemctl status cloudera-scm-agent
web页面操作
登录主节点的7180端口：http://node1:7180/
登陆用户名:admin 登陆密码: admin
TODO ....