Oracle環境：

版本：Oracle 11gR2 RAC （Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production）

Rac節點資訊：

Host檔案：

安裝過程：

1、建立asmsnmp使用者：

su - grid

sqlplus / as sysasm

create user asmsnmp identified by 123456;

grant sysdba to asmsnmp;
 

2、ASM例項註冊於listener_scan1：

alter system set remote_listener='racscan:1521' scope=both sid='*';

alter system register;

3、檢視cluster name：

/u01/app/11.2.0/grid/bin/cemutlo -n

4、重歸EM：

su - oracle

emca -config dbcontrol db -repos recreate -cluster

配置過程如下： 

[[email protected] ~]$  emca -config dbcontrol db -repos recreate -cluster

STARTED EMCA at Sep 29, 2018 5:40:04 PM
EM Configuration Assistant, Version 11.2.0.0.2 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:
Database unique name: racdb
Service name: racdb
Listener port number: 1521
Listener ORACLE_HOME [ /u01/app/11.2.0/grid ]: 
Password for SYS user:  
Password for DBSNMP user:  
Password for SYSMAN user:  
Cluster name: rac-cluster
Email address for notifications (optional): 
Outgoing Mail (SMTP) server for notifications (optional): 
ASM ORACLE_HOME [ /u01/app/11.2.0/grid ]: 
ASM port [ 1521 ]: 
ASM username [ ASMSNMP ]: 
ASM user password:  
-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................ /u01/app/oracle/product/11.2.0/dbhome_1

Database instance hostname ................ rac1
Listener ORACLE_HOME ................ /u01/app/11.2.0/grid
Listener port number ................ 1521
Cluster name ................ rac-cluster
Database unique name ................ racdb
Email address for notifications ............... 
Outgoing Mail (SMTP) server for notifications ............... 
ASM ORACLE_HOME ................ /u01/app/11.2.0/grid
ASM port ................ 1521
ASM user role ................ SYSDBA
ASM username ................ ASMSNMP

-----------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: y
Sep 29, 2018 5:41:06 PM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /u01/app/oracle/cfgtoollogs/emca/racdb/emca_2018_09_29_17_40_04.log.
Sep 29, 2018 5:41:09 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Dropping the EM repository (this may take a while) ...
Sep 29, 2018 5:45:29 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Sep 29, 2018 5:45:30 PM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) ...
Sep 29, 2018 5:53:53 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
Sep 29, 2018 5:53:59 PM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository
INFO: Uploading configuration data to EM repository (this may take a while) ...
Sep 29, 2018 5:55:00 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Uploaded configuration data successfully
Sep 29, 2018 5:55:01 PM oracle.sysman.emcp.EMDBCConfig instantiateOC4JConfigFiles
INFO: Propagating /u01/app/oracle/product/11.2.0/dbhome_1/oc4j/j2ee/OC4J_DBConsole_rac1_racdb to remote nodes ...
Sep 29, 2018 5:55:03 PM oracle.sysman.emcp.EMDBCConfig instantiateOC4JConfigFiles
INFO: Propagating /u01/app/oracle/product/11.2.0/dbhome_1/oc4j/j2ee/OC4J_DBConsole_rac2_racdb to remote nodes ...
Sep 29, 2018 5:55:09 PM oracle.sysman.emcp.EMAgentConfig deployStateDirs
INFO: Propagating /u01/app/oracle/product/11.2.0/dbhome_1/rac1_racdb to remote nodes ...
Sep 29, 2018 5:55:11 PM oracle.sysman.emcp.EMAgentConfig deployStateDirs
INFO: Propagating /u01/app/oracle/product/11.2.0/dbhome_1/rac2_racdb to remote nodes ...
Sep 29, 2018 5:55:13 PM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO:  Location /u01/app/oracle/product/11.2.0/dbhome_1/EMStagePatches_racdb is not shared. Software library could not be configured. Provisioning archives will not be deployed. Please configure it manually. 
Sep 29, 2018 5:55:13 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) ...
Sep 29, 2018 5:55:32 PM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
Sep 29, 2018 5:58:24 PM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Sep 29, 2018 5:58:25 PM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://rac1:1158/em <<<<<<<<<<<
Sep 29, 2018 5:58:32 PM oracle.sysman.emcp.EMDBPostConfig showClusterDBCAgentMessage
INFO: 
****************  Current Configuration  ****************
 INSTANCE            NODE           DBCONTROL_UPLOAD_HOST
----------        ----------        ---------------------

racdb             rac1              rac1
racdb             rac2              rac1

Sep 29, 2018 5:58:32 PM 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/11.2.0/dbhome_1/rac1_racdb/sysman/config/emkey.ora.   Please 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 Sep 29, 2018 5:58:33 PM

5、啟動EM： 

分別在兩個節點的oracle使用者下執行：

[[email protected] ~]$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0 
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
https://rac1:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 11g Database Control .............. started. 
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/product/11.2.0/dbhome_1/rac1_racdb/sysman/log 
 

[[email protected] ~]$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0 
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
https://rac1:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 11g Database Control .......... started. 
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/product/11.2.0/dbhome_1/rac2_racdb/sysman/log 

6、在IE瀏覽器中開啟地址：https://racscan:1158/em ，登入即可