Cloudera Manager还是比较耗资源的，想把Cloudera Manager，移动到比较好的机器上。

在这篇文章中，Cloudera Manager安装在bigserver1上面，bigserver1是奔腾双核的CPU。

1，Cloudera Manager占资源比较多

cloudera manager占资源挺多

停止cdh，以及cloudera manager

2，从bigserver1导出数据库，copy到新机器

# mysqldump -u cdh6 -pCdh6_123 scm -h 10.0.40.237 > scm.sql

# mysqldump -u cdh6 -pCdh6_123 amon -h 10.0.40.237 > amon.sql

# mysqldump -u cdh6 -pCdh6_123 rman -h 10.0.40.237 > rman.sql

# mysqldump -u cdh6 -pCdh6_123 hue -h 10.0.40.237 > hue.sql

# mysqldump -u cdh6 -pCdh6_123 metastore -h 10.0.40.237 > metastore.sql

# mysqldump -u cdh6 -pCdh6_123 sentry -h 10.0.40.237 > sentry.sql

# mysqldump -u cdh6 -pCdh6_123 nav -h 10.0.40.237 > nav.sql

# mysqldump -u cdh6 -pCdh6_123 navms -h 10.0.40.237 > navms.sql

# mysqldump -u cdh6 -pCdh6_123 oozie -h 10.0.40.237 > oozie.sql

# scp *.sql root@bigserver5:/root/cdh6/

3，在bigserver5(新机器)创建数据并导入

CREATE DATABASE scm DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use scm;

source /root/cdh6/scm.sql;

CREATE DATABASE amon DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use amon;

source /root/cdh6/amon.sql;

CREATE DATABASE rman DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use rman;

source /root/cdh6/rman.sql;

CREATE DATABASE hue DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use hue;

source /root/cdh6/hue.sql;

CREATE DATABASE metastore DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use metastore;

source /root/cdh6/metastore.sql;

CREATE DATABASE sentry DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use sentry;

source /root/cdh6/sentry.sql;

CREATE DATABASE nav DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use nav;

source /root/cdh6/nav.sql;

CREATE DATABASE navms DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use navms;

source /root/cdh6/navms.sql;

CREATE DATABASE oozie DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

use oozie;

source /root/cdh6/oozie.sql;

grant all privileges on *.* TO cdh6@'10.%' IDENTIFIED BY 'Cdh6_123';

flush privileges;

第二，第三步，非必须。把数据库放在bigserver1(老机器)也是可以的。

4，bigserver5新机器安装cloudera-manager-server

# yum clean all && yum makecache

# yum install cloudera-manager-daemons cloudera-manager-agent cloudera-manager-server

这里的bigserver5，是集群中新增的一个datanode节点，怎么添加节点，请参考：cdh6 增加 datanode

5，将bigserver1文件同步到bigserver5

# scp -r /var/lib/cloudera-scm-server/* root@bigserver5:/var/lib/cloudera-scm-server/

# chown -R cloudera-scm:cloudera-scm /var/lib/cloudera-scm-server/

# scp -r /opt/cloudera/parcel-repo root@bigserver5:/opt/cloudera/

# chown -R cloudera-scm:cloudera-scm /opt/cloudera/parcel-repo

5，bigserver5上面，创建数据库配置

[root@bigserver5 ~]# /opt/cloudera/cm/schema/scm_prepare_database.sh -h bigserver5 mysql scm cdh6 Cdh6_123

JAVA_HOME=/usr/local/jdk1.8.0_231

Verifying that we can write to /etc/cloudera-scm-server

Creating SCM configuration file in /etc/cloudera-scm-server

Executing: /usr/local/jdk1.8.0_231/bin/java -cp :/opt/cloudera/cm/schema/../lib/* com.cloudera.enterprise.dbutil.DbCommandExecutor /etc/cloudera-scm-server/db.properties com.cloudera.cmf.db.

[ main] DbCommandExecutor INFO Unable to find JDBC driver for database type: MySQL

[ main] DbCommandExecutor ERROR JDBC Driver com.mysql.jdbc.Driver not found.

[ main] DbCommandExecutor ERROR Exiting with exit code 3

--> Error 3, giving up (use --force if you wish to ignore the error)

找不到mysql的jar包，/opt/cloudera/cm/schema/../lib/* ，根bigserver1上面的mysql-connector-java.jar包位置不一样。

解决办法：

# wget https://cdn.mysql.com//archives/mysql-connector-java-5.1/mysql-connector-java-5.1.47.tar.gz

# tar zxvf mysql-connector-java-5.1.47.tar.gz

# cd mysql-connector-java-5.1.47

# cp mysql-connector-java-5.1.47-bin.jar /opt/cloudera/cm/lib/mysql-connector-java.jar

注意：mysql-connector-java不要带有版本号。

6，在bigserver5启动Cloudera Management Service

# systemctl start cloudera-scm-server

如果用新的数据库，需要改数据连接，所有组件都要改

cloudera 数据库连接修改

Activity Monitor 数据库测试失败

如果报：不能测试状态不佳的主机的数据库连接。

解决办法：

# cd /var/lib/cloudera-scm-agent/

# rm -f cm_guid

# service cloudera-scm-agent restart

Cloudera Management Service启动后，在启动cdh，至此迁移结束。