概述：oracle数据库的日常管理可以使用命令行及图形化界面进行管理；命令行的命令工具有sqlplus 、srvctl 、 crsctl 等命令，图形化界面有10g版本的EM dbconsole、11g版本的EM dbconsole、grid control 集中管理、12c版本中的EM express、cloud control集中管理；本文将对11g中的EM dbconsole工具进行简单安装介绍。
实验思路：
1、重建em
2、打开em管理界面进行查看
实验：
emca的具体命令
emca -help
[oracle@cube ~]$ emca
/u01/app/oracle/product/11.2.0/db_1/bin/emca [operation] [mode] [dbType] [flags] [parameters]
-h | –h | -help | –help: prints this help message
-version: prints the version
-config dbcontrol db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure Database Control for a database
-config centralAgent (db | asm) [-cluster] [-silent] [parameters]: configure central agent management
-config all db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure both Database Control and central agent management
-deconfig dbcontrol db [-repos drop] [-cluster] [-silent] [parameters]: de-configure Database Control
-deconfig centralAgent (db | asm) [-cluster] [ -silent] [parameters]: de-configure central agent management
-deconfig all db [-repos drop] [-cluster] [-silent] [parameters]: de-configure both Database Control and central agent management
-addNode (db | asm) [-silent] [parameters]: configure EM for a newly added node for a database
-deleteNode (db | asm) [-silent] [parameters]: de-configure EM for for a database on node getting deleted
-addInst (db | asm) [-silent] [parameters]: configure EM for a new RAC instance
-deleteInst (db | asm) [-silent] [parameters]: de-configure EM for a specified RAC instance
-reconfig ports [-cluster] [parameters]: explicitly reassign Database Control ports
-reconfig dbcontrol -cluster [-silent] [parameters]: reconfigures RAC Database Control deployment
-displayConfig dbcontrol -cluster [-silent] [parameters]: displays information about the RAC Database Control configuration
-migrate -from dbcontrol -to centralAgent [-repos drop] [-cluster] [-silent] [parameters]: migrates EM configuration from Database Control to central agent
-upgrade (db | asm | db_asm) [-cluster] [-silent] [parameters]: upgrades an earlier version of the EM configuration to the current version
-updateTargets crs [-silent] [parameters]: updates new crs home for all dbcontrol and central agents on crs upgrade
-restore (db | asm | db_asm) [-cluster] [-silent] [parameters]: restores the current version of the EM configuration to an earlier version
Parameters and Options:
[parameters]: [ -respFile fileName ] [ -paramName paramValue ]*
db: perform configuration operation for a database (including databases that use ASM)
asm: perform configuration operation for an ASM-only instance
db_asm: perform upgrade/restore operation for a database and an ASM instance
-repos create: create a new Database Control repository
-repos drop: drop the current Database Control repository
-repos recreate: drop the current Database Control repository and recreate a new one
-cluster: perform configuration operation for a RAC database
-silent: perform configuration operation without prompting for parameters
-backup: configure automatic backup for a database
Parameters for single instance databases
ORACLE_HOSTNAME: Local hostname
SID: Database SID
PORT: Listener port number
ORACLE_HOME: Database ORACLE_HOME
LISTENER_OH: Listener ORACLE_HOME
HOST: Listener Host
HOST_USER: Host username for automatic backup
HOST_USER_PWD: Host user password for automatic backup
BACKUP_SCHEDULE: Automatic backup schedule (HH:MM)
EMAIL_ADDRESS: Email address for notifications
MAIL_SERVER_NAME: Outgoing Mail (SMTP) server for notifications
ASM_OH: ASM ORACLE_HOME
ASM_SID: ASM SID
ASM_PORT: ASM port
ASM_USER_ROLE: ASM user role
ASM_USER_NAME: ASM username
ASM_USER_PWD: ASM user password
SRC_OH: ORACLE_HOME for the database to be upgraded
DBSNMP_PWD: Password for DBSNMP user
SYSMAN_PWD: Password for SYSMAN user
SYS_PWD: Password for SYS user
DBCONTROL_HTTP_PORT: Database Control HTTP port
AGENT_PORT: EM agent port
RMI_PORT: RMI port for Database Control
JMS_PORT: JMS port for Database Control
EM_SWLIB_STAGE_LOC: Software library location
PORTS_FILE: Path to a static file specifying the ports to use (Default value : ${ORACLE_HOME}/install/staticports.ini).
Additional Parameters for cluster databases
CLUSTER_NAME: Cluster name
DB_UNIQUE_NAME: Database unique name
SERVICE_NAME: Service name
EM_NODE: Database Control node name
EM_NODE_LIST: Agent Node list [comma separated]
Note: For Desktop Class Install always pass parameter ORACLE_HOSTNAME
as “localhost” to any emca command
重建em
[oracle@cube ~]$ emca -config dbcontrol db -repos recreate
STARTED EMCA at Dec 27, 2017 2:44:58 PM
EM Configuration Assistant, Version 11.2.0.3.0 Production
Copyright (c) 2003, 2011, Oracle. All rights reserved.
Enter the following information:
Database SID: CUBE
Listener port number: 1521
Listener ORACLE_HOME [ /u01/app/oracle/product/11.2.0/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/11.2.0/db_1
Local hostname ……………. cube
Listener ORACLE_HOME ……………. /u01/app/oracle/product/11.2.0/db_1
Listener port number ……………. 1521
Database SID ……………. CUBE
Email address for notifications ……………
Outgoing Mail (SMTP) server for notifications ……………
—————————————————————–
Do you wish to continue? [yes(Y)/no(N)]: Y
INFO: Securing Database Control (this may take a while) …
Dec 27, 2017 2:56:55 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
Dec 27, 2017 2:56:55 PM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) …
Dec 27, 2017 2:58:12 PM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Dec 27, 2017 2:58:12 PM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://cube:1158/em <<<<<<<<<<<
Dec 27, 2017 2:58:19 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/db_1/cube_CUBE/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 Dec 27, 2017 2:58:19 PM
至此，重建EM完成 可以通过浏览器访问管理监控oracle数据库运行状态。。