OAS - CHANGING HOSTNAME

Question

Hi,
I have 2 servers working in Service Guard cluster.
The dcmctl listcomponents gives OC4J (2 instances) and OHS.
When the application is moved to other node (ie. because of failure) then it doesn;t start. I suppose it is connected with different hostname of these two nodes.
In this configuration, is it possible to in easy way change the hostname in configuration ???
I will be greatfull for any ideas..
Radek

Answer 1

Change Hostname of database & application
Steps to be followed:
1)     Database & Application must be open.
1. Deregister the current database server (Required)
As the database hostname and/or port will be changed, the current database server node needs to be de-registered.
To deregister the current database server node, run the following command as the owner of the Oracle RDBMS file system and current database instance:
2)     Login on database in our case login on machine 192.168.1.182 with orat user.
3)     Go to this directory by following command:
4)     orat@emaarmgft $ cd $ORACLE_HOME/appsutil
5)     Type this command:
6)     orat@emaarmgft $ perl bin/adgentns.pl appspass=apps contextfile=DEV_emaarmgft.xml -removeserver
7)     output is something like this:
Generate Tns Names
Classpath : :/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/charsets.jar:
/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/core.jar:/u04/oracle/devdb/9.2.0
/jre/1.4.2/lib/graphics.jar:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/javaplugin.jar
:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/security.jar:/u04/oracle/devdb/9.2.0/jre/
1.4.2/lib/server.jar:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/xml.jar:/u04/oracle/d
evdb/9.2.0/jdbc/lib/classes12.jar:/u04/oracle/devdb/9.2.0/appsutil/java/xmlparse
rv2.zip:/u04/oracle/devdb/9.2.0/appsutil/java:/u04/oracle/devdb/9.2.0/jlib/netcf
g.jar
Loading ORACLE_HOME environment from /u04/oracle/devdb/9.2.0
Logfile: /u04/oracle/devdb/9.2.0/appsutil/log/DEV_emaarmgft/10251131/NetServiceHandler.log
adgentns.pl exiting with status 0
ERRORCODE = 0 ERRORCODE_END
2. Deregister the current Applications server (Required)
As the Applications hostname will be changed, the current Applications server node needs to be de-registered.
To deregister the current Applications server node, run the following command as the owner of the Oracle Applications file system and current database instance:
perl $AD_TOP/bin/adgentns.pl appspass=<APPSpwd> \
contextfile=<CONTEXT> -removeserver
Login in application: applt
Go to following directory;
applt@emaarmgft$ cd $APPL_TOP/admin
then put the following command:
perl $AD_TOP/bin/adgentns.pl appspass=<APPSpwd> \
contextfile=DEV_emaarmgft.xml -removeserver
=======================================================================================================
Locate the System Name:
The System name is the database name
Verify with sql query:
select DB_NAME from FND_DATABASES;
Locate the server name corresponding to the tier in question:
Query on the Applications tier:
select NAME, SERVER_TYPE from FND_APP_SERVERS, FND_NODES
where FND_APP_SERVERS.NODE_ID = FND_NODES.NODE_ID and
SERVER_TYPE='APPS' and FND_NODES.NODE_NAME=upper('hostname');
Run the following PL/SQL block:
begin
FND_NET_SERVICES.remove_server('<SYSTEM_NAME'>, '<SERVER_NAME>');
end;
IN our case Something is like this:
8)     then login in sqlplus
9)     put this command
10)     SQL> conn
Enter user-name: apps
Enter password:
Connected.
SQL> begin
2 fnd_net_services.remove_server('DEV','emaarmgft_DEV_APPS');
3 end;
4 /
PL/SQL procedure successfully completed.
SQL> commit;
     Commit complete.
=================================================================================================
2. Update the AutoConfig Context files in Database Tier (conditional)
If the Context file values have already been changed previously and you had to manually remove the Tier server, then you can skip this step
Create a new context file using the following syntax:-
This will create a new Context file of the format <SID>_<new hostname>.xml in the current working directory
11)     Then go to following path like this:
12)     Login in orat
13)     cd $ORACLE_HOME/appsutil
14)     Type this command orat@emaarmgft $ perl ./bin/adclonectx.pl contextfile=$CONTEXT_FILE
15) Output this something like this
/u04/oracle/devdb/9.2.0/jre/1.4.2/bin/java -classpath /u04/oracle/devdb/9.2.0/jd
bc/lib/classes12.jar:/u04/oracle/devdb/9.2.0/appsutil/java/xmlparserv2.zip:/u04/
oracle/devdb/9.2.0/jre/1.4.2/lib/rt.jar:/u04/oracle/devdb/9.2.0/appsutil/java: o
racle.apps.ad.context.CloneContext -e /u04/oracle/devdb/9.2.0/appsutil/DEV_emaa
rmgft.xml -perl "/u04/oracle/devdb/9.2.0/Apache/perl/bin/perl" -perl5lib "/u04/o
racle/devdb/9.2.0/Apache/perl/lib/5.00503:/u04/oracle/devdb/9.2.0/Apache/perl/li
b/site_perl/5.005:/u04/oracle/devdb/9.2.0/appsutil/perl" -tmpl ./bin/../template
/adxdbctx.tmp
Provide the values required for creation of the new Database Context file.
Do you want to use a virtual hostname for the target node (y/n) [n] ?:
Target hostname [emaarmgft]:emgftest
Target instance is a Real Application Cluster (RAC) instance (y/n) [n]:
Target System database name [DEV]:
Oracle OS User [orat]:
Oracle OS Group [dba]:
Target system RDBMS ORACLE_HOME directory [u04/oracle/devdb/9.2.0]:
Target system utl_file accessible directories list [usr/tmp]:
Number of DATA_TOP's on the target system [4]:
Target system DATA_TOP 1:
RC-00212: Warning: Input value cannot be null
Target system DATA_TOP 1:1
RC-00213: Warning: The path specified must be the absolute path
Target system DATA_TOP 1: /u04/oracle/devdb
Target system DATA_TOP 2: /u04/oracle/devdata
Target system DATA_TOP 3: /u04/oracle/devab
Target system DATA_TOP 4: /u04/oracle/devbc
Do you want to preserve the Display set to emaarmgft:0.0 (y/n) [y] ?:n
Target system Display [emgftest:0.0]:
Do you want to preserve the port values from the source system on the target sys
tem (y/n) [y] ?:
Database port is 1522
New context path and file name [DEV_emgftest.xml]:
Creating the new Database Context file from :
/u04/oracle/devdb/9.2.0/appsutil/template/adxdbctx.tmp
The new database context file has been created :
/u04/oracle/devdb/9.2.0/appsutil/DEV_emgftest.xml
Log file located at /u04/oracle/devdb/9.2.0/appsutil/CloneContext_10251144.log
orat@emaarmgft $
=============================================================================================
2. Update the AutoConfig Context files in Application Tier(conditional)
If the Context file values have already been changed previously and you had to manually remove the Tier server, then you can skip this step
Create a new context file using the following syntax:-
cd $APPL_TOP/admin
perl $AD_TOP/bin/adclonectx.pl contextfile=$CONTEXT_FILE
This will create a new Context file of the format <SID>_<new hostname>.xml in
Login in Application: applt
applt@emaarmgft$ cd $APPL_TOP
applt@emaarmgft$ perl $AD_TOP/bin/adclonectx.pl contextfile=$CONTEXT_FILE
This will create a new contextfile. In our case a new contextfile will create in $APPL_TOP/admin directory with this name:
DEV_emgftest.xml
===========================================================================================
3. Shutdown the Applications Tier Services (Required)
Shutdown the Middle Tier services using the script under the following location:-
applt@emaarmgft$ cd $APPLCSF/scripts/DEV_emaarmgft
applt@emaarmgft$ ./adstpall.sh apps/apps
Run AutoConfig on the Database Tier (Required)
Run AutoConfig on the database tier node using the following syntax:-
cd <RDBMS ORACLE_HOME>/appsutil/bin/
./adconfig.sh contextfile=<RDBMS ORACLE_HOME>/appsutil/<SID>_<new_hostname>.xml
15)     go to following path like this:
16)     orat@emaarmgft $ cd $ORACLE_HOME/appsutil
17)     orat@emaarmgft $ cd bin
18)     orat@emaarmgft $ ./adconfig.sh contextfile=$ORACLE_HOME/appsutil/DEV_emgftest.xml
19)     output is something like this:
Enter the APPS user password:
AutoConfig is configuring the Database environment...
AutoConfig will consider the custom templates if present.
Using ORACLE_HOME location : /u04/oracle/devdb/9.2.0
Classpath : :/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/cha
rsets.jar:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/core.jar:/u04/oracle/devdb/9.2.0
/jre/1.4.2/lib/graphics.jar:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/javaplugin.jar
:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/security.jar:/u04/oracle/devdb/9.2.0/jre/
1.4.2/lib/server.jar:/u04/oracle/devdb/9.2.0/jre/1.4.2/lib/xml.jar:/u04/oracle/d
evdb/9.2.0/jdbc/lib/classes12.jar:/u04/oracle/devdb/9.2.0/appsutil/java/xmlparse
rv2.zip:/u04/oracle/devdb/9.2.0/appsutil/java:/u04/oracle/devdb/9.2.0/jlib/netcfg.jar
Using Context file : /u04/oracle/devdb/9.2.0/appsutil/DEV_emgftest.xml
Context Value Management will now update the Context file
Updating Context file...COMPLETED
Attempting upload of Context file and templates to database...COMPLETED
Updating rdbms version in Context file to db920
Updating rdbms type in Context file to 64 bits
Configuring templates from ORACLE_HOME ...
AutoConfig completed with errors.
The log file for this session is located at: /u04/oracle/devdb/9.2.0/appsutil/log/DEV_emgftest/10251218/adconfig.log
=======================================================================================================
Run AutoConfig on the Applications Tier(s) (Required)
Run AutoConfig on the Applications tier node using the following syntax:-
cd <COMMON_TOP>/admin/scripts/<CONTEXT_NAME>
./adautocfg.sh appspass=<appspasswd>
20)     login in application with applt
21 ) then go to follwing directory
22) cd $APPLCSF/scripts/DEV_emgftest/
23) applt@emaarmgft $ ./adautocfg.sh appspass=apps
24) Output is something like this:
AutoConfig is configuring the Applications environment...
AutoConfig will consider the custom templates if present.
Using APPL_TOP location : /u03/oracle/devappl
Classpath : :/usr/java14/jre/lib/charsets.jar:/usr/jav
a14/jre/lib/core.jar:/usr/java14/jre/lib/graphics.jar:/usr/java14/jre/lib/ibmcer
tpathprovider.jar:/usr/java14/jre/lib/ibmjaaslm.jar:/usr/java14/jre/lib/ibmjcefw
.jar:/usr/java14/jre/lib/ibmjgssprovider.jar:/usr/java14/jre/lib/ibmjssefips.jar
:/usr/java14/jre/lib/ibmjsseprovider.jar:/usr/java14/jre/lib/ibmorb.jar:/usr/jav
a14/jre/lib/ibmorbapi.jar:/usr/java14/jre/lib/ibmpkcs.jar:/usr/java14/jre/lib/ja
vaplugin.jar:/usr/java14/jre/lib/security.jar:/usr/java14/jre/lib/server.jar:/us
r/java14/jre/lib/xml.jar:/usr/java14/lib/dt.jar:/usr/java14/lib/tools.jar:/u03/o
racle/devcomn/java/appsborg2.zip:/u03/oracle/devcomn/java
Using Context file : /u03/oracle/devappl/admin/DEV_emaarmgft.xm
l
Context Value Management will now update the Context file
Updating Context file...COMPLETED
Attempting upload of Context file and templates to database...COMPLETED
Configuring templates from all of the product tops...
Configuring AD_TOP........COMPLETED
Configuring FND_TOP.......COMPLETED
Configuring ICX_TOP.......COMPLETED
Configuring IEO_TOP.......COMPLETED
Configuring ABM_TOP.......COMPLETED
Configuring ECX_TOP.......COMPLETED
Configuring BIS_TOP.......COMPLETED
Configuring GL_TOP........COMPLETED
Configuring AMS_TOP.......COMPLETED
Configuring CCT_TOP.......COMPLETED
Configuring WSH_TOP.......COMPLETED
Configuring CLN_TOP.......COMPLETED
Configuring OKE_TOP.......COMPLETED
Configuring OKL_TOP.......COMPLETED
Configuring OKS_TOP.......COMPLETED
Configuring CSF_TOP.......COMPLETED
Configuring XNC_TOP.......COMPLETED
Configuring IGS_TOP.......COMPLETED
Configuring IBY_TOP.......COMPLETED
Configuring PA_TOP........COMPLETED
Configuring JTF_TOP.......COMPLETED
Configuring MWA_TOP.......COMPLETED
Configuring CN_TOP........COMPLETED
Configuring CSI_TOP.......COMPLETED
Configuring WIP_TOP.......COMPLETED
Configuring CSE_TOP.......COMPLETED
Configuring EAM_TOP.......COMPLETED
Configuring IMT_TOP.......COMPLETED
Configuring FTE_TOP.......COMPLETED
Configuring ONT_TOP.......COMPLETED
Configuring AR_TOP........COMPLETED
Configuring AHL_TOP.......COMPLETED
Configuring OZF_TOP.......COMPLETED
Configuring IES_TOP.......COMPLETED
Configuring CSD_TOP.......COMPLETED
Configuring IGC_TOP.......COMPLETED
AutoConfig completed successfully.
The log file for this session is located at: /u03/oracle/devappl/admin/DEV_emaar
mgft/log/10251222/adconfig.log
5. Shutdown the Database Listener (required)
Shutdown the DB TNS listener using the script under the following location (old configuration script)
<RDBMS ORACLE_HOME>/appsutil/scripts/<old SID_hostname>/addlnctl.sh stop {listener}
6. Shutdown the Database (conditional)
If the hostname of the Database Tier is to be changed shutdown the Database now
Shutdown the DB TNS listener using the script under the following location (old configuration script)
<RDBMS ORACLE_HOME>/appsutil/scripts/<old SID_hostname>/addbctl.sh stop immediate
26)     then login in oracle user like orat
27)     go to this directory
28)     cd $ORACLE_HOME/appsutil/scripts/DEV_emaarmgft
29)     shutdown the listener
30)     shutdown the database.
Change the machine hostname (conditional)
Login in root user
Type the following command:
# chdev –l inet0 –a hostname=emgftest
Change the hostname like:
# vi /etc/hosts
This will open a vi editor
Type the following entry:
192.168.1.182     emgftest.emaarmgf.com
save it .
Shutdown the Machine:
#shutdown –r
Start the Database (conditional)
If the database was stopped in a previous step, source your new environment file, and start the Database
<RDBMS ORACLE_HOME>/appsutil/scripts/<new SID_hostname>/addbctl.sh start
9. Start the DB TNS Listener (required)
Source you new environment file and start the Database listener
<RDBMS ORACLE_HOME>/appsutil/scripts/<new SID_hostname>/addlnctl.sh start {listener}
If the port was changed, ensure it starts on the new port
10. Start the Applications Tier Services
Start the Applications Tier Services using the following script:-
$COMMON_TOP/admin/scripts/<SID_hostname>/adstrtal.sh apps <appspasswd>