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Auto Restart Enterprise Manager Cloud ControlAgent 12c;

March 5th, 2012 | Posted in 11gR2, 12c, Blog, enterprise manager, RAC | 3 Comments

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Introduction:

Oracle Restart is a component added to the 11gR2 in order to improve the highavailability of dierent database resources.Database instances, listeners are resources that can be automatically restartedafter a hardware or software failure or whenever the server host restarts.

These components can be easily added to the Oracle Restart using the crsctl addcommand.

In this article, I am going to show you how to add the Enterprise Manager Agent12c component to the Oracle Restart.

The following procedure has been tested on 11.2.0.3 RAC environment underRedhat Enterprise Linux. Apply the following steps on each node of the cluster.

Auto Restart Enterprise Manager Cloud Control ... http://www.oracle-class.com/?p=2597

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The procedure:

The Agent cloud control 12c is installed under the /opt/agent12c directory.The agent can be started / Stopped by running $AGENT_HOME/bin/emctl startagent , $AGENT_HOME/bin/emctl stop agent commands, where$AGENT_HOME is /opt/agent12c/agent_inst in my case.

First, login to one of the RAC nodes as a root user, change the directory to$GRID_HOME/crs/script (or $CRS_HOME/crs/script). Create two scriptscrs_agent12c.sh and agentstartup.sh with the following contents; (Remember tochange the values to reect your environment);

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[grid@node1 script]$ cat crs_agent12c.sh 01.

#!/bin/bash 02.

# 03.

# dbcagent.sh - script to start and stop the EMC 12c agent 04.

# 05.

06.

ORACLE_BASE=/opt/app/oracle 07.

ORACLE_HOME=/opt/app/oracle/product/11.2.0/db_1 08.

LIBRARY_PATH=$ORACLE_HOME/lib 09.

ORACLE_SID=tstdb1 10.

ORACLE_UNQNAME=tstdb 11.

PATH=$ORACLE_HOME/bin:$PATH 12.

13.

export ORACLE_BASE 14.

export ORACLE_HOME 15.

export LD_LIBRARY_PATH 16.

export ORACLE_SID 17.

export ORACLE_UNQNAME 18.

export PATH 19.

20.

agent_start () { 21.

sudo -u oracle /opt/11.2.0/grid/crs/script/agentstartup.sh start 22.

} 23.

24.

agent_stop () { 25.

sudo -u oracle /opt/11.2.0/grid/crs/script/agentstartup.sh stop 26.

} 27.

28.

agent_check () { 29.

sudo -u oracle /opt/11.2.0/grid/crs/script/agentstartup.sh check 30.

} 31.

32.

case "$1" in 33.

start) 34.

agent_start 35.

;; 36.

stop) 37.

agent_stop 38.

;; 39.

check) 40.

agent_check 41.

;; 42.

clean) 43.


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agent_clean $(ps -C emagent -o pid=) 44.

;; 45.

*) 46.

echo $"Usage: `basename $0` {start|stop|status|clean}" 47.

exit 1 48.

esac 49.

[grid@node1 script]$ 50.

51.

52.

[grid@node1 script]$ cat agentstartup.sh 53.

#!/bin/bash 54.

# 55.

56.

ORACLE_BASE=/opt/app/oracle 57.

ORACLE_HOME=/opt/app/oracle/product/11.2.0/db_1 58.

LIBRARY_PATH=$ORACLE_HOME/lib 59.

ORACLE_SID=tstdb1 60.

ORACLE_UNQNAME=tstdb 61.

AGENT_HOME=/opt/agent12c/agent_inst 62.

63.

export ORACLE_BASE 64.

export ORACLE_HOME 65.

export LD_LIBRARY_PATH 66.

export ORACLE_SID 67.

export ORACLE_UNQNAME 68.

export AGENT_HOME 69.

70.

agent_start () { 71.

$AGENT_HOME/bin/emctl start agent 72.

} 73.

74.

agent_stop () { 75.

$AGENT_HOME/bin/emctl stop agent 76.

} 77.

78.

agent_check () { 79.

$AGENT_HOME/bin/emctl status agent 80.

} 81.

82.

case "$1" in 83.

start) 84.

agent_start 85.

;; 86.

stop) 87.

agent_stop 88.

;; 89.

check) 90.

agent_check 91.

;; 92.

clean) 93.

agent_clean $(ps -C emagent -o pid=) 94.

;; 95.

*) 96.

echo $"Usage: `basename $0` {start|stop|status|clean}" 97.

exit 1 98.

esac 99.

[grid@node1 script]$ 100.

Run the following commands:


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[root@node1 ~]# chown -R grid:oinstall $GRID_HOME/crs/script 01.

[root@node1 ~]# chmod 755 $GRID_HOME/crs/script/* 02.

Now, edit the /etc/sudoers le where all the access rules are saved. Per default,sudo requires authentication through a password. When NOPASSWD is speciedthe execution of the commands will not requires a password.


[root@node1 ~]# chmod 640 /etc/sudoers 01.

02.

####Comment out the line (#Defaults requiretty) in /etc/sudoers files 03.

04.

####Add the following lines to /etc/sudoers where node1 is the hostname. 05.

06.

grid node1 =(oracle) NOPASSWD: /opt/11.2.0/grid/crs/script/agentstartup.sh start 07.

grid node1 =(oracle) NOPASSWD: /opt/11.2.0/grid/crs/script/agentstartup.sh stop 08.

grid node1 =(oracle) NOPASSWD: /opt/11.2.0/grid/crs/script/agentstartup.sh check 09.

10.

11.

[root@node1 ~]# chmod 440 /etc/sudoers 12.

Modify the following les permission;

[root@node1 ~]# chmod 664 /opt/agent12c/agent_inst/sysman/config/emd.properties 01.

[root@node1 ~]# chmod 755 /opt/agent12c/agent_inst/bin/emctl 02.

Now, lets add the resource to Oracle restart;


[root@node1 ~]# su - grid 01.

[grid@node1 ~]$ crsctl add resource crs_agent12c -type local_resource -attr " ACTION_SCRIPT=

/11.2.0/grid/crs/script

/crs_agent12c.sh,DESCRIPTION=Local Ressource for Agent 12c, DEGREE=1, ENABLED=1, AUTO

02.

[grid@node1 ~]$ 03.

[grid@node1 ~]$ crsctl start res crs_agent12c 04.

CRS-2672: Attempting to start 'crs_agent12c' on 'node1' 05.

CRS-2676: Start of 'crs_agent12c' on 'node1' succeeded 06.

[grid@node1 ~]$ 07.

08.

09.

[grid@node1 ~]$ crsctl status res crs_agent12c 10.

NAME=crs_agent12c 11.

TYPE=local_resource 12.

TARGET=ONLINE 13.

STATE=ONLINE on node1 14.

15.

[grid@node1 ~]$ 16.

Hope it helps!,Wissem


4 of 12 05/03/2014 04:56 PM

3 Comments to Auto Restart Enterprise Manager Cloud

Control Agent 12c;

Andreas says:April 11, 2012 at 9:12 am

Hello Wissem,

thank you for the scripts, they are very helpful! However, there seems to bea small problem: I cannot nd the denition of agent_clean(), which isreferenced in this command:

agent_clean $(ps -C emagent -o pid=)

Can you add the missing function? The start, stop, and check actions areeasy to understand, but I do not understand yet what the clean() function iscalled for.

Reply

1.

Auto Restart Enterprise Manager Cloud Control Agent 12c All Things

Oracle says:May 10, 2012 at 10:25 am

[...] the full article here: Auto Restart Enterprise Manager Cloud ControlAgent 12c; Wissem El [...]

Reply

2.

Joachim Pierre says:November 20, 2012 at 8:20 pm

I dont understand agent_clean either. Please elaborate.

Reply

3.

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Adrian Iriarte: Saludos, Que buen articulo, casi siempre al momento dequerer implementar soluciones para el...Patricia: Hi Wissem, is there a workaround for this? I mean I want to usethe sqlnet.authentication_services =none,...Brian: I created the cdb manually using the instruction, but then I tried tocreate pdb within in, it failed. have...Farmer Johnson: Hi Wissem. How did you avoid the error you hadprevisouly encountered: sudo opatch auto...Hctor Moro: Querido Nelson; Despus de entrevistar a mas de 50profesionales de primer nivel en Uruguay, al n te...What is NO2 Maximus: I genuinely apreciated your site! You shoulupdate it with new info!Nav: Indeed helpful, to the point article..Koti: Can you please explain all the sections of AWR report in RAC. I meanto ask output produced by awrgrpt.sql...Himanshu: Nice post.can you please comment on this Why RMAN restoredthe DATA_REORTING datae to +DATA diskgroup?Enrique: Great post.gabriel: what version of sqldeveloper support plugable database?Kal: Quality thanks


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