CentOS 7 安装 CDH6.2.0（centos 7 安装 Django）

本教程为离线安装版本，在线安装太费时间了，本教程是本人根据官方文档亲自操作完成，中间踩过坑，趟过雷，现把过程记录一下。

一、准备工作

1、准备四台电脑

192.168.1.101 node1 2CPU 8G内存 50G硬盘
192.168.1.102 node2 2CPU 2G内存 50G硬盘
192.168.1.103 node3 2CPU 2G内存 50G硬盘
192.168.1.104 mysql.node 2CPU 1G内存 50G硬盘
所有电脑禁用防火墙
systemctl stop firewalld
systemctl disable firewalld

2、离线文件下载

• CM 6.2.0

下载地址：
https://archive.cloudera.com/cm6/6.2.0/redhat7/yum/RPMS/x86_64/cloudera-manager-daemons-6.2.0-968826.el7.x86_64.rpm
https://archive.cloudera.com/cm6/6.2.0/redhat7/yum/RPMS/x86_64/cloudera-manager-agent-6.2.0-968826.el7.x86_64.rpm
https://archive.cloudera.com/cm6/6.2.0/redhat7/yum/RPMS/x86_64/cloudera-manager-server-6.2.0-968826.el7.x86_64.rpm

• CDH 6.2.0

下载地址：
https://archive.cloudera.com/cdh6/6.2.0/parcels/CDH-6.2.0-1.cdh6.2.0.p0.967373-el7.parcel
https://archive.cloudera.com/cdh6/6.2.0/parcels/manifest.json
https://archive.cloudera.com/cdh6/6.2.0/parcels/CDH-6.2.0-1.cdh6.2.0.p0.967373-el7.parcel.sha1

• JDK1.8.0_212

准备 linux JDK： jdk-8u212-linux-x64.tar.gz

二、配置hostname及hosts

1、在node1上执行以下命令

#将主机名改为node1
> hostnamectl set-hostname node1
# 编辑 /etc/hosts文件，增加以下行
192.168.1.101 node1
192.168.1.102 node2
192.168.1.103 node3
192.168.1.104 mysql.node

2、在node2上执行以下命令

#将主机名改为node2
> hostnamectl set-hostname node2
# 编辑 /etc/hosts文件，增加以下行
192.168.1.101 node1
192.168.1.102 node2
192.168.1.103 node3
192.168.1.104 mysql.node

3、在node3上执行以下命令

#将主机名改为node3
> hostnamectl set-hostname node3
# 编辑 /etc/hosts文件，增加以下行
192.168.1.101 node1
192.168.1.102 node2
192.168.1.103 node3
192.168.1.104 mysql.node

4、在mysql.node上执行以下命令

> hostnamectl set-hostname mysql.node
# 编辑 /etc/hosts文件，增加以下行
192.168.1.101 node1
192.168.1.102 node2
192.168.1.103 node3
192.168.1.104 mysql.node

三、JDK安装

分别在 node1、node2、node3电脑上安装JDK，JDK 要求

• 必需是64位
• 必需1.8及以上
• 相同版本的JDK安装在所有的集群电脑上
• 必需安装在 /usr/java/目录下

四、配置免密登录

1、分别在node1、node2、node3 机器上生成密钥对

# 进入用户主目录
> cd ~
# 生成密钥对
> ssh-keygen -t rsa
然后一路回车键

2、在node1上执行

# 进入.ssh
> cd ~/.ssh
# 把本机的公钥追加到自身的~/.ssh/authorized_keys文件里
> ssh-copy-id node1
# 将authorized_keys文件复制到第二台主机
> scp ~/.ssh/authorized_keys node2:~/.ssh/

3、在node2上执行

> cd ~/.ssh
> ssh-copy-id node2
> scp ~/.ssh/authorized_keys node3:~/.ssh/

4、在node3上执行

> cd ~/.ssh
> ssh-copy-id node3
> scp ~/.ssh/authorized_keys mysql.node:~/.ssh/

5、在mysql.node上执行

> cd ~/.ssh
> ssh-copy-id mysql.node
> scp ~/.ssh/authorized_keys node1:~/.ssh/
> scp ~/.ssh/authorized_keys node2:~/.ssh/
> scp ~/.ssh/authorized_keys node3:~/.ssh/

6、免密码ssh配置完成

五、安装Cloudera Manager Server

1、将下载下来的cloudera-manager-daemons-6.2.0-968826.el7.x86_64.rpm、cloudera-manager-agent-6.2.0-968826.el7.x86_64.rpm、cloudera-manager-server-6.2.0-968826.el7.x86_64.rpm上传到 node1电脑/tmp目录下

2、node1上安装cloudera-manager-daemons、cloudera-manager-agent、cloudera-manager-server

> cd /tmp
> yum -y localinstall cloudera-manager-daemons-6.2.0-968826.el7.x86_64.rpm
> yum -y localinstall cloudera-manager-agent-6.2.0-968826.el7.x86_64.rpm
> yum -y localinstall cloudera-manager-server-6.2.0-968826.el7.x86_64.rpm

3、node2、node3 上只安装cloudera-manager-daemons、cloudera-manager-agent，把这两个安装文件上传到 node2、node3 /tmp目录下

> cd /tmp
> yum -y localinstall cloudera-manager-daemons-6.2.0-968826.el7.x86_64.rpm
> yum -y localinstall cloudera-manager-agent-6.2.0-968826.el7.x86_64.rpm

4、将以下文件拷贝到node1 /opt/cloudera/parcel-repo 目录下，安装CDH 本地源

CDH-6.2.0-1.cdh6.2.0.p0.967373-el7.parcel
manifest.json
CDH-6.2.0-1.cdh6.2.0.p0.967373-el7.parcel.sha1
CDH-6.2.0-1.cdh6.2.0.p0.967373-el7.parcel.sha1 将此文件重命名为
CDH-6.2.0-1.cdh6.2.0.p0.967373-el7.parcel.sha

5、修改node1、node2、node3电脑中 /etc/cloudera-scm-agent/config.ini文件

将文件中 server_host=localhost 改为 server_host=node1

六、安装MySQL数据库

1、在mysql.node电脑上安装Mysql

# 如果电脑中没有 wget工具
> yum -y install wget
> wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
> rpm -ivh mysql-community-release-el7-5.noarch.rpm
> yum install mysql-server

2、按照官方的建议，将/etc/my.cnf文件内容更改为以下配置

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
transaction-isolation = READ-COMMITTED
# Disabling symbolic-links is recommended to prevent assorted security risks;
# to do so, uncomment this line:
symbolic-links = 0
key_buffer_size = 32M
max_allowed_packet = 32M
thread_stack = 256K
thread_cache_size = 64
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1
max_connections = 550
#expire_logs_days = 10
#max_binlog_size = 100M
#log_bin should be on a disk with enough free space.
#Replace '/var/lib/mysql/mysql_binary_log' with an appropriate path for your
#system and chown the specified folder to the mysql user.
log_bin=/var/lib/mysql/mysql_binary_log
#In later versions of MySQL, if you enable the binary log and do not set
#a server_id, MySQL will not start. The server_id must be unique within
#the replicating group.
server_id=1
binlog_format = mixed
read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M
# InnoDB settings
innodb_file_per_table = 1
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 64M
innodb_buffer_pool_size = 4G
innodb_thread_concurrency = 8
innodb_flush_method = O_DIRECT
innodb_log_file_size = 512M
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
sql_mode=STRICT_ALL_TABLES

3、将mysql设置为开机启动

> systemctl enable mysqld

4、启动Mysql server

> systemctl start mysqld

5、运行/usr/bin/mysql_secure_installation设置MySQL root密码和其他安全相关设置。

> /usr/bin/mysql_secure_installation
[...]
Enter current password for root (enter for none):
OK, successfully used password, moving on...
[...]
Set root password? [Y/n] Y
New password:
Re-enter new password:
Remove anonymous users? [Y/n] Y
[...]
Disallow root login remotely? [Y/n] N
[...]
Remove test database and access to it [Y/n] Y
[...]
Reload privilege tables now? [Y/n] Y
All done!

6、Mysql安装完成

7、为Cloudera 软件创建相应的数据库及用户

mysql> CREATE USER '<user>' IDENTIFIED BY '<password>';
mysql> CREATE DATABASE <database> DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
mysql> GRANT ALL ON <database>.* TO '<user>'@'%' IDENTIFIED BY '<password>';

注：可能Mysql会无法远程连接，如果无法连接请进行以下步骤

> mysql -uroot -p[password]
mysql> show databases;
mysql> use mysql;
mysql> select host from user where user = 'root';
mysql> update user set host='%' where user='root' and host='localhost';
mysql> exit

七、Cloudera Manager Server 连接数据库

1、在node1上，提供JDBC连接驱动

这里提供的是 mysql-connector-java-5.1.46.jar，
将此文件放到 node1电脑/usr/share/java/（必需这个目录）目录下，
并重命名为mysql-connector-java.jar

2、Cloudera Manager Server 提供了一个脚本来配置数据库

> /opt/cloudera/cm/schema/scm_prepare_database.sh [options] <databaseType> <databaseName> <databaseUser> <password>

• databaseType: [mysql | oracle | postgresql]
• databaseName: 数据库名
• databaseUser: 数据库用户名
• password: 数据库密码

3、如果Mysql和Cloudera Manager Server 在同一台机器上，则执行以下命令

# 此示例假定您已创建Cloudera Management Server数据库和数据库用户，同时命名为scm：
> /opt/cloudera/cm/schema/scm_prepare_database.sh mysql scm scm
Enter SCM password:
...
[main] DbCommandExecutor INFO Successfully connected to database.
All done, your SCM database is configured correctly!

4、如果Mysql和Cloudera Manager Server 不在同一台机器上，则执行以下命令

# 本教程为不同机器安装，所以执行这个命令
> /opt/cloudera/cm/schema/scm_prepare_database.sh mysql -h mysql.node --scm-host node1 scm scm
Enter database password:
...
[main] DbCommandExecutor INFO Successfully connected to database.
All done, your SCM database is configured correctly!

八、启动Cloudera Manager Server 和 Agent

1、启动 Cloudera Manager Server

> systemctl start cloudera-scm-server

2、执行以下命令可以查看server日志

> tail -f /var/log/cloudera-scm-server/cloudera-scm-server.log

当看到此日志条目时，Cloudera Manager管理控制台已准备就绪：

INFO WebServerImpl:com.cloudera.server.cmf.WebServerImpl: Started Jetty server.

3、分别在 node1、node2、node3 上启动agent

> systemctl start cloudera-scm-agent

4、执行以下命令查看agent日志

> tail -f /var/log/cloudera-scm-agent/cloudera-scm-agent.log

5、在浏览器中打开 http://<server_host>:7180， 默认用户名、密码：admin

6、登录成功，配置集群，结束