文档 <http://site.clairvoyantsoft.com/migrate-cloudera-scm-database-from-postgresql-to-mysql/>
http://node0:7180/api/v14/cm/deployment -------------正确网址。
#####1.停止服务；
1.在UI界面，停止集群；
2.在UI界面，停止cm的service，monitor等全部服务；
3.在Linux，停止agent服务：service cloudera-scm-agent stop
#####2.备份CM配置，通过API ------
$ curl -v -u admin:admin http://node0:7180/api/<version>/cm/deployment > /home/user/deployment
本机：
$ curl -v -u admin:admin http://node0:7180/api/v14/cm/deployment > /home/user/deployment
注意：这个文件被保留和保护至关重要,因为它将需要重新导入功能配置到新数据库中。（v14）
Obtain version with: http://manager_host:7180/api/version
#####3.对postgre的db和server目录做备份。
#cd /var/lib/cloudera-scm-server-db/
#tar -cvf /home/user/cloudera-scm-server-db.tar .
#cd /etc/cloudera-scm-server/
#tar -cvf /home/user/cloudera-scm-server.tar .
文件归档在 /home/user/ 下。
#####4.在server端，停止server，停止server-db，抛弃server-db off
$ sudo service cloudera-scm-server stop
$ sudo service cloudera-scm-server-db stop
$ sudo chkconfig cloudera-scm-server-db off
#####5.保证mysql server正确安装。--------------------<font color=red>[1]</font>
#####6.安装、配置mysql软件------<font color=red>[2]</font>
#####7.创建"temp" db 并且赋权限，记录“示例1:运行脚本当MySQL安装在另一个主机”<font color=red>[3]</font>
#mysql -h mysql_hostname -u user -p
mysql> create database temp;
mysql> grant all on *.* to 'temp'@'%' identified by 'temp' with grant option;
#####8.执行/usr/share/cmf/schema/scm_prepare_database.sh(可重置)
$/usr/share/cmf/schema/scm_prepare_database.sh mysql -h mysql_hostname -u user -p --scm-host manager_host <scm_db_name> <scm_user> <scm_password>
Note: run $ /usr/share/cmf/schema/scm_prepare_database.sh
with no arguments to get syntax assistance
#####9.开启server服务。
service httpd start
$ sudo service cloudera-scm-server start
#####10.Cloudera Manager web用户界面登录和上传企业许可证密钥。
#####11.重启scm-server
$ sudo service cloudera-scm-server restart
#####12.修复CM配置（step2），通过API---
$ curl --upload-file /home/user/deployment -u admin:admin http://node0:7180/api/v14/cm/deployment?deleteCurrentDeployment=true -H "Content-Type: application/json"
//add http header option（恢复集群的命令）： -H "Content-Type: application/json" ..if required
//verify that there are no errors, the command prints the api even on connection failure.
#####13.登录CM，验证当前的配置选项。所有服务现在应该可用但是停止状态。
尝试，所有主机-重新运行升级向导。
#####14.cleanup:
$ yum erase cloudera-manager-server-sb
#####15.如果scm-agent启动失败，你必须删除或者一出pid ./var/lib/cloudera-scm-agent/ 并且重启agent。
###参考网址
[1] <http://www.cloudera.com/documentation/enterprise/latest/topics/cm_ig_mysql.html#cmig_topic_5_5_2>
[2] <http://dev.mysql.com/downloads/mysql/>
[3] <http://www.cloudera.com/documentation/enterprise/latest/topics/cm_ig_installing_configuring_dbs.html#concept_i2r_m3m_hn__example_fsj_cyp_bm>
[4] ref: https://gist.github.com/gwenshap/7044525</br>
<font color = 'red'>[5] <http://site.clairvoyantsoft.com/migrate-cloudera-scm-database-from-postgresql-to-mysql/>【译】</br></font>
http://cwiki.apachecn.org/pages/viewpage.action?pageId=2888090
参考网址1-----配置mysql server和jdbc driver：
1.
参考网址3：在另一台主机配置mysql2，连接mysql1。
---
3、 查看postgresql 的scm用户的密码
grep password /etc/cloudera-scm-server/db.properties
会得到如下信息：
[root@hadoop1 /]# grep password /etc/cloudera-scm-server/db.properties
com.cloudera.cmf.db.password=pfxlUudKJo
4、 登陆postgresql 数据库
psql -h localhost -p 7432 -U scm
输入第三步查到的密码
/usr/share/cmf/schema/scm_prepare_database.sh postgresql scm scm scm
/etc/init.d/cloudera-manager-server-db restart
http://blog.csdn.net/dracotianlong/article/details/7907633
<http://blog.csdn.net/mirabelle521/article/details/71169631>
**guid删除，重新运行升级向导**
/var/lib/cloudera-scm-agent/cm_guid 删除guid--主机状况不良（由于原集群的guid存在唯一性，过时）
---http://blog.csdn.net/wonder4/article/details/58585180
---http://blog.csdn.net/u011031430/article/details/74057601
---https://www.cloudera.com/documentation/enterprise/release-notes/topics/cm_rn_known_issues.html#rn_OPSAPS-34847
---**重新运行升级向导<br>**
---parcel没有分发，但是是活动的<BR>
**取消parcel异常分发状态--激活卡主**
> use curl -X POST with Cloudera API.
> http://node0:7180/api/v14/cm/deployment中找到相应的配置。
> 格式API文档：http://node0:7180/static/apidocs/
curl -u admin:admin -X POST http://node0:7180/api/v14/clusters/cluster/parcels/products/KAFKA/versions/2.0.2-1.2.0.2.p0.5/commands/deactivate
curl -u admin:admin -X POST http://node0:7180/api/v14/clusters/cluster/parcels/products/CDH/versions/5.8.0-1.cdh5.8.0.p0.42/commands/deactivate
<http://community.cloudera.com/t5/Cloudera-Manager-Installation/Parcel-not-distributed-but-have-active-state-ACTIVATING/m-p/32474/highlight/true><br>
**ctrl + B**
拒绝连接-- /etc/hosts
**官方文档**
https://www.cloudera.com/documentation/enterprise/latest/topics/installation.html