环境：redhat 5.8-64bit

db: oracle 11.2.0.4- 64bit

准备继续学习下ocp的相关知识点，在vm中创建oem，其中一些emca、emctl用法和在操作中出错的情景，详细如下：

=====1、emca和emctl用法

1，修改DBSNMP密码：

重新配置DBCONSOLE，需要输入DBSNMP密码，但任何密码都会显示错误，需要预先修改。

sql>alter user dbsnmp identified by xxx;

2，删除早期DBCONSOLE创建的用户：

sql>drop role MGMT_USER;

sql>drop user MGMT_VIEW cascade;

sql>drop user sysman cascade;

3，删除早期DBCONSOLE创建的对象：

sql>drop PUBLIC SYNONYM MGMT_TARGET_BLACKOUTS;

sql>drop public synonym SETEMVIEWUSERCONTEXT;

4，重新创建DBCONSOLE：(如果是在windows下，要先到注册表删除DBCONSOLE的服务，重启电脑)

$emca -config dbcontrol db -repos create

如果此命令还是失败，可直接利用重建命令：

$emca -config dbcontrol db -repos recreate

根据提示，先输入SID，再输入Y继续；

输入端口1521，输入SYS密码，输入DBSNMP密码，输入SYSMAN 密码，输入Y继续

完成。

5，检查状态 emctl status dbconsole。

附emca常用命令：

创建一个EM资料库

emca -repos create

重建一个EM资料库

emca -repos recreate

删除一个EM资料库

emca -repos drop

配置数据库的 Database Control

emca -config dbcontrol db

删除数据库的 Database Control配置

emca -deconfig dbcontrol db

重新配置db control的端口，默认端口在1158

emca -reconfig ports

emca -reconfig ports -dbcontrol_http_port 1160

emca -reconfig ports -agent_port 3940

先设置ORACLE_SID环境变量后,启动EM console服务

emctl start dbconsole

先设置ORACLE_SID环境变量后,停止EM console服务

emctl stop dbconsole

先设置ORACLE_SID环境变量后,查看EM console服务的状态

emctl status dbconsole

配置dbconsole的步骤

emca -repos create

emca -config dbcontrol db

emctl start dbconsole

重新配置dbconsole的步骤

emca -repos drop

emca -repos create

emca -config dbcontrol db

emctl start dbconsole

-------------------------------------------------------------------------------------------------------------------------

Oracle 10G重建EM DB Control.

1.drop configuration files and repository run :

emca -deconfig dbcontrol db -repos drop

2. Logon SQLPLUS as user SYS or SYSTEM, and drop the sysman account and mangement objects:

a. drop user sysman cascade;

b. drop role MGMT_USER;

c. drop user MGMT_VIEW cascade;

d. drop public synonym MGMT_TARGET_BLACKOUTS;

e. drop public synonym SETEMVIEWUSERCONTEXT;

3.Create configuration files and repository run

emca -config dbcontrol db -repos create

创建EM时,提示的端口号,应为实例的断口号,比如1521,不是EM的端口号(比如1158)

EM的端口号在这个文件中可以查到10.2.0\db_1\sysman\config\emca.properties

然后,进行em后,界面出来了,但报了一个错:

Java.lang.Exception: Exception in sending Request :: null

很多功能不能用,提示重新登录.

在Oracle论坛上查到了解决办法:

找到下面的文件

10.2.0\db_1\ZYKNET_ORC2\sysman\config\emd.properties

其中的agentTZRegion缺省是GMT,改为你所在的时区即可,例如:

agentTZRegion=Asia/Chungking

关于时区的列表参考：10.2.0\db_1\sysman\admin\supportedtzs.lst

然后，重启OracleDBConsole

=====2、操作时出错的情景

1.  emca： 按要求配置了.bash_profile中的环境变量

点击(此处)折叠或打开

ORACLE_UNQNAME=orcl; export ORACLE_UNQNAME

ORACLE_HOSTNAME=srv1; export ORACLE_HOSTNAME

ORACLE_HOMENAME配置时，开始配置了localhost

EM Configuration issue. /u01/app/oracle/product/10.2.0/db_1/localhost_orcl not found.

2. emca配置用户locked问题

srv1:/home/oracle> emca -config dbcontrol db -repos create

STARTED EMCA at Feb 25, 2015 10:55:33 AM

EM Configuration Assistant, Version 11.2.0.3.0 Production

Copyright (c) 2003, 2011, Oracle.  All rights reserved.

Enter the following information:

Database SID: orcl

Listener port number: 1521

Listener ORACLE_HOME [ /u01/app/oracle/product/10.2.0/db_1 ]:

Password for SYS user:

Password for DBSNMP user:

Feb 25, 2015 10:56:17 AM oracle.sysman.emcp.util.GeneralUtil initSQLEngineLoacly

WARNING: ORA-28000: the account is locked

这个地方 DBSNMP用户被locked了，需要解锁

sysdba用户: alter user sysman account unlock;即可

3. 由于开始时配置ORACLE_HOSTNAME=localhost,导致出错，只能用命令emca -config dbcontrol db -repos recreate重新创建下

点击(此处)折叠或打开

srv1:/home/oracle> emca -config dbcontrol db -repos recreate

STARTED EMCA at Feb 25, 2015 10:58:39 AM

EM Configuration Assistant, Version 11.2.0.3.0 Production

Copyright (c) 2003, 2011, Oracle. All rights reserved.

Enter the following information:

Database SID: orcl

Listener port number: 1521

Listener ORACLE_HOME [ /u01/app/oracle/product/10.2.0/db_1 ]:

Password for SYS user:

Password for DBSNMP user:

Password for SYSMAN user:

Email address for notifications (optional):

Outgoing Mail (SMTP) server for notifications (optional):

-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................ /u01/app/oracle/product/10.2.0/db_1

Local hostname ................ srv1

Listener ORACLE_HOME ................ /u01/app/oracle/product/10.2.0/db_1

Listener port number ................ 1521

Database SID ................ orcl

Email address for notifications ...............

Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------

----------------------------------------------------------------------

WARNING : While repository is dropped the database will be put in quiesce mode.

----------------------------------------------------------------------

Do you wish to continue? [yes(Y)/no(N)]: Y

Feb 25, 2015 10:58:59 AM oracle.sysman.emcp.EMConfig perform

INFO: This operation is being logged at /u01/app/oracle/cfgtoollogs/emca/orcl/emca_2015_02_25_10_58_38.log.

Feb 25, 2015 10:59:01 AM oracle.sysman.emcp.EMReposConfig invoke

INFO: Dropping the EM repository (this may take a while) ...

Feb 25, 2015 11:03:13 AM oracle.sysman.emcp.EMReposConfig invoke

INFO: Repository successfully dropped

Feb 25, 2015 11:03:15 AM oracle.sysman.emcp.EMReposConfig createRepository

INFO: Creating the EM repository (this may take a while) ...

Feb 25, 2015 11:15:06 AM oracle.sysman.emcp.EMReposConfig invoke

INFO: Repository successfully created

Feb 25, 2015 11:15:23 AM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository

INFO: Uploading configuration data to EM repository (this may take a while) ...

Feb 25, 2015 11:17:37 AM oracle.sysman.emcp.EMReposConfig invoke

INFO: Uploaded configuration data successfully

Feb 25, 2015 11:17:45 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole

INFO: Securing Database Control (this may take a while) ...

Feb 25, 2015 11:18:06 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole

INFO: Database Control secured successfully.

Feb 25, 2015 11:18:06 AM oracle.sysman.emcp.util.DBControlUtil startOMS

INFO: Starting Database Control (this may take a while) ...

Feb 25, 2015 11:20:37 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration

INFO: Database Control started successfully

Feb 25, 2015 11:20:37 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration

INFO: >>>>>>>>>>> The Database Control URL is <<<<<<<<<<<

Feb 25, 2015 11:20:52 AM oracle.sysman.emcp.EMDBPostConfig invoke

WARNING:

************************ WARNING ************************

Management Repository has been placed in secure mode wherein Enterprise Manager data will be encrypted. The encryption key has been placed in the file: /u01/app/oracle/product/10.2.0/db_1/srv1_orcl/sysman/config/emkey.ora. Ensure this file is backed up as the encrypted data will become unusable if this file is lost.

***********************************************************

Enterprise Manager configuration completed successfully

FINISHED EMCA at Feb 25, 2015 11:20:52 AM

创建完毕，成功！！注意：：用360浏览器打开时，无法登陆，用firefox没有问题，，这里对360浏览器吐槽下！！！！