Sometimes Hostname can be requested to be changed on where Oracle ASM is installed, in which case there are steps to be taken on Oracle ASM and HAS ( High Availability Services ).

Any database which ASM is not installed, you can change the hostname, then reboot and register and open the listener.

However, when Oracle ASM is installed for database, some configurations are required.

Now let’s explain them step by step below.

If you are planning to change the hostname and ip address of the standalone grid infrastructure ( oracle restart), then we need to do below deconfig and reconfig on the grid setup.

1. Stop the has:-

$GRID_HOME/bin/crsctl stop has

[grid@rac6 ~]$ echo $ORACLE_HOME

/u02/app/18.3.0/grid

[grid@rac6 ~]$ crsctl stop has

CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac6'

CRS-2673: Attempting to stop 'ora.DATA.dg' on 'rac6'

CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'rac6'

CRS-2677: Stop of 'ora.DATA.dg' on 'rac6' succeeded

CRS-2673: Attempting to stop 'ora.asm' on 'rac6'

CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'rac6' succeeded

CRS-2677: Stop of 'ora.asm' on 'rac6' succeeded

CRS-2673: Attempting to stop 'ora.evmd' on 'rac6'

CRS-2677: Stop of 'ora.evmd' on 'rac6' succeeded

CRS-2673: Attempting to stop 'ora.cssd' on 'rac6'

CRS-2677: Stop of 'ora.cssd' on 'rac6' succeeded

CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac6' has completed

CRS-4133: Oracle High Availability Services has been stopped.

[grid@rac6 ~]$

2 . Run the deconfig tool ( from root user )

export GRID_HOME=/u02/app/18.3.0/grid

$GRID_HOME/crs/install/roothas.pl -deconfig -force

./roothas.pl: line 8: =head1: command not found

rootcrs.sh/roothas.sh should be used instead of rootcrs.pl/roothas.pl

[root@rac6 install]# ./roothas.sh -verbose -deconfig -force

Using configuration parameter file: /u02/app/18.3.0/grid/crs/install/crsconfig_params

The log of current session can be found at:

/u02/app/grid/crsdata/rac6/crsconfig/hadeconfig.log

PRCR-1070 : Failed to check if resource ora.asm is registered

CRS-0184 : Cannot communicate with the CRS daemon.

2021/07/19 14:44:22 CLSRSC-180: An error occurred while executing the command '/u02/app/18.3.0/grid/bin/srvctl remove asm -force'

PRCR-1070 : Failed to check if resource ora.ons is registered

CRS-0184 : Cannot communicate with the CRS daemon.

2021/07/19 14:44:23 CLSRSC-180: An error occurred while executing the command '/u02/app/18.3.0/grid/bin/srvctl config ons'

2021/07/19 14:45:44 CLSRSC-337: Successfully deconfigured Oracle Restart stack

[root@rac6 install]#

3. Change hostname in this step:-

1) /etc/hosts and

2) /etc/sysconfig/network files

[root@rac6 ~]# cat /etc/hosts

127.0.0.1 localhost

192.168.0.106 rac6.samik.com

[root@rac6 ~]#

[root@rac6 ~]# vi /etc/hosts

[root@rac6 ~]#

[root@rac6 ~]# cat /etc/hosts

127.0.0.1 localhost

192.168.0.108 rac8.samik.com

[root@rac6 ~]# cat /etc/sysconfig/network

# Created by anaconda

NETWORKING=yes

HOSTNAME=rac6.samik.com

[root@rac6 ~]#

[root@rac6 ~]# vi /etc/sysconfig/network

[root@rac6 ~]#

[root@rac6 ~]# cat /etc/sysconfig/network

# Created by anaconda

NETWORKING=yes

HOSTNAME=rac8.samik.com

[oracle@root network-scripts]$ cat ifcfg-ens32

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO=none

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

NAME=ens32

UUID=f3747baa-7155-4757-9b38-66f32fed29c8

DEVICE=ens32

ONBOOT=yes

IPADDR=192.168.0.106

PREFIX=24

GATEWAY=192.168.0.1

IPV6INIT=no

[oracle@localhost network-scripts]$ vi ifcfg-ens32

[root@localhost network-scripts]# cat ifcfg-ens32

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO=none

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

NAME=ens32

UUID=f3747baa-7155-4757-9b38-66f32fed29c8

DEVICE=ens32

ONBOOT=yes

IPADDR=192.168.0.108

PREFIX=24

GATEWAY=192.168.0.1

IPV6INIT=no

4. Reboot server and then check Hostname:-

[root@rac8 ~]# hostname

rac8.samik.com

[root@rac8 ~]#

[root@rac8 ~]# cat /etc/hosts

127.0.0.1 localhost

192.168.0.108 rac8.samik.com

[root@rac8 ~]#

5. Set ASM Profile and go to $ORACLE_HOME/crs/install directory. Execute roothas.sh script and configure High Availability Services again.

[root@rac8 ~]# cd $ORACLE_HOME/crs/install

[root@rac8 install]#

[root@rac8 install]# ./roothas.sh

Using configuration parameter file: /u02/app/18.3.0/grid/crs/install/crsconfig_params

The log of current session can be found at:

/u02/app/grid/crsdata/rac8/crsconfig/roothas_2021-07-19_03-26-29PM.log

LOCAL ADD MODE

Creating OCR keys for user 'grid', privgrp 'oinstall'..

Operation successful.

LOCAL ONLY MODE

Successfully accumulated necessary OCR keys.

Creating OCR keys for user 'root', privgrp 'root'..

Operation successful.

CRS-4664: Node rac8 successfully pinned.

2021/07/19 15:26:40 CLSRSC-330: Adding Clusterware entries to file 'oracle-ohasd.service'

CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac8'

CRS-2673: Attempting to stop 'ora.evmd' on 'rac8'

CRS-2677: Stop of 'ora.evmd' on 'rac8' succeeded

CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac8' has completed

CRS-4133: Oracle High Availability Services has been stopped.

CRS-4123: Oracle High Availability Services has been started.

rac8 2021/07/19 15:29:11 /u02/app/18.3.0/grid/cdata/rac8/backup_20210719_152911.olr 70732493

2021/07/19 15:29:11 CLSRSC-327: Successfully configured Oracle Restart for a standalone server

[root@rac8 install]# crsctl check has

CRS-4638: Oracle High Availability Services is online

6. Change Auto Start parameter of ora.cssd ( Cluster Syncronization Services Daemon ) as 1 like following.

[root@rac8 install]# crsctl modify resource "ora.cssd" -init -attr "AUTO_START=1"

[root@rac8 install]#

7. Stop and Start 'has' now:-

[root@rac8 install]# crsctl stop has

CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac8'

CRS-2673: Attempting to stop 'ora.evmd' on 'rac8'

CRS-2677: Stop of 'ora.evmd' on 'rac8' succeeded

CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac8' has completed

CRS-4133: Oracle High Availability Services has been stopped.

[root@rac8 install]# crsctl start has

CRS-4123: Oracle High Availability Services has been started.

8. Now you can startup Oracle ASM Instance like following.

[grid@rac8 ~]$ sqlplus / as sysasm

SQL*Plus: Release 18.0.0.0.0 - Production on Mon Jul 19 16:11:28 2021

Version 18.3.0.0.0

Connected to an idle instance.

SQL>

SQL> startup

ORA-00099: warning: no parameter file specified for ASM instance

ASM instance started

Total System Global Area 1136934472 bytes

Fixed Size 8666696 bytes

Variable Size 1103101952 bytes

ASM Cache 25165824 bytes

ORA-15110: no diskgroups mounted

SQL>

SQL> select instance_name,status from gv$Instance;

INSTANCE_NAME STATUS

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

+ASM STARTED

SQL> select path from v$asm_disk;

PATH

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

ORCL:DISK1

SQL>

SQL> create spfile from pfile;

create spfile from pfile

ERROR at line 1:

ORA-29786: Oracle Restart attribute GET failed with error [Attribute 'SPFILE'

sts[200] lsts[0]]

SQL> shut immediate;

ORA-15100: invalid or missing disk group name

ASM instance shutdown

[grid@rac7 ~]$ cat init+ASM.ora

+ASM.__oracle_base='/u02/app/grid'#ORACLE_BASE set from in memory value

*.asm_power_limit=1

*.large_pool_size=12M

*.remote_login_passwordfile='EXCLUSIVE'

SQL>

SQL> startup pfile=init+ASM.ora

ASM instance started

Total System Global Area 1136934472 bytes

Fixed Size 8666696 bytes

Variable Size 1103101952 bytes

ASM Cache 25165824 bytes

ORA-15110: no diskgroups mounted

SQL> alter diskgroup DATA MOUNT;

Diskgroup altered.

SQL>

SQL> select path from v$asm_disk;

PATH

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

/dev/oracleasm/disks/DISK1

SQL>

SQL> create spfile from pfile;

create spfile from pfile

ERROR at line 1:

ORA-29786: Oracle Restart attribute GET failed with error [Attribute 'SPFILE'

sts[200] lsts[0]]

9. Check asm config details :-

[grid@rac8 ~]$ srvctl config asm

PRCR-1001 : Resource ora.asm does not exist

[grid@rac8 ~]$

From above error, it means, no ASM resource created that has to communicate with cluster services

10. Add ASM resource using srvctl command as :

[grid@rac8 ~]$ srvctl config asm

PRCR-1001 : Resource ora.asm does not exist

[grid@rac8 ~]$

[grid@rac8 ~]$ srvctl add asm

[grid@rac8 ~]$

[grid@rac8 ~]$ srvctl config asm

ASM home: <CRS home>

Password file:

Backup of Password file:

ASM listener: LISTENER

Spfile:

ASM diskgroup discovery string: ++no-value-at-resource-creation--never-updated-through-ASM++

[grid@rac8 ~]$

[grid@rac8 ~]$ srvctl status asm

ASM is not running.

[grid@rac8 ~]$

[grid@rac8 ~]$ srvctl start asm

[grid@rac8 ~]$

[grid@rac8 ~]$ srvctl status asm

ASM is running on rac8

[grid@rac8 ~]$

[grid@rac8 ~]$ sqlplus / as sysasm

SQL*Plus: Release 18.0.0.0.0 - Production on Mon Jul 19 20:00:38 2021

Version 18.3.0.0.0

Connected to:

Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production

Version 18.3.0.0.0

SQL>

SQL> show parameter spfile

NAME TYPE VALUE

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

spfile string

SQL>

SQL> create spfile from pfile;

create spfile from pfile

ERROR at line 1:

ORA-01078: failure in processing system parameters

LRM-00109: could not open parameter file

'/u02/app/18.3.0/grid/dbs/init+ASM.ora'

SQL> shut immediate;

11. Create pfile from ASM instance and start the instance:-

[grid@rac8 dbs]$ pwd

/u02/app/18.3.0/grid/dbs

[grid@rac8 dbs]$

[grid@rac8 dbs]$ cat init+ASM.ora_bkp

*.asm_diskstring='/dev/oracleasm/disks/*'

*.asm_power_limit=1

*.large_pool_size=12M

*.instance_type='asm'

*.remote_login_passwordfile='EXCLUSIVE'

*.asm_diskgroups='DATA'

*.diagnostic_dest='/u02/app/grid'

12. create the spfile from pfile :-

SQL> startup;

ASM instance started

Total System Global Area 1136934472 bytes

Fixed Size 8666696 bytes

Variable Size 1103101952 bytes

ASM Cache 25165824 bytes

ASM diskgroups mounted

ASM diskgroups volume enabled

SQL>

SQL> show parameter spfile

NAME TYPE VALUE

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

spfile string

SQL>

SQL> !pwd

/u02/app/18.3.0/grid/dbs

SQL> create spfile='+DATA' from pfile='/u02/app/18.3.0/grid/dbs/init+ASM.ora';

File created.

SQL>

SQL> shut immediate;

ASM diskgroups volume disabled

ASM diskgroups dismounted

ASM instance shutdown

SQL>

SQL> exit

[grid@rac8 dbs]$ sqlplus "/as sysasm"

SQL*Plus: Release 18.0.0.0.0 - Production on Mon Jul 19 22:11:16 2021

Version 18.3.0.0.0

Connected to an idle instance.

SQL>

SQL> startup;

ASM instance started

Total System Global Area 1136934472 bytes

Fixed Size 8666696 bytes

Variable Size 1103101952 bytes

ASM Cache 25165824 bytes

ASM diskgroups mounted

ASM diskgroups volume enabled

Note:- When you create spfile, please find the below output from asm alert log file-

13. Shutdown ASM instance once again :-

[grid@rac8 dbs]$ sqlplus / as sysasm

SQL*Plus: Release 18.0.0.0.0 - Production on Mon Jul 19 23:46:17 2021

Version 18.3.0.0.0

Connected to an idle instance.

SQL> startup;
ASM instance started
Total System Global Area 1136934472 bytes
Fixed Size 8666696 bytes
Variable Size 1103101952 bytes
ASM Cache 25165824 bytes
ASM diskgroups mounted
ASM diskgroups volume enabled
SQL>
SQL>
SQL> show parameter spfile
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
spfile string +DATA/ASM/ASMPARAMETERFILE/reg
istry.253.1078357407

[grid@rac8 ~]$ crsctl status resource -t

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

Name Target State Server State details

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

Local Resources

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

ora.DATA.dg

ONLINE ONLINE rac8 STABLE

ora.LISTENER.lsnr

ONLINE ONLINE rac8 STABLE

ora.asm

ONLINE ONLINE rac8 STABLE

ora.ons

OFFLINE OFFLINE rac8 STABLE

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

Cluster Resources

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

ora.cssd

1 ONLINE ONLINE rac8 STABLE

ora.diskmon

1 OFFLINE OFFLINE STABLE

ora.evmd

1 ONLINE ONLINE rac8 STABLE

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

[grid@rac8 ~]$

14. Stop and Start 'has' one more time::-

[grid@rac8 dbs]$ crsctl stop has

CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac8'

CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'rac8'

CRS-2673: Attempting to stop 'ora.evmd' on 'rac8'

CRS-2673: Attempting to stop 'ora.DATA.dg' on 'rac8'

CRS-2677: Stop of 'ora.DATA.dg' on 'rac8' succeeded

CRS-2673: Attempting to stop 'ora.asm' on 'rac8'

CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'rac8' succeeded

CRS-2677: Stop of 'ora.evmd' on 'rac8' succeeded

CRS-2677: Stop of 'ora.asm' on 'rac8' succeeded

CRS-2673: Attempting to stop 'ora.cssd' on 'rac8'

CRS-2677: Stop of 'ora.cssd' on 'rac8' succeeded

CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac8' has completed

CRS-4133: Oracle High Availability Services has been stopped.

[grid@rac8 dbs]$

[grid@rac8 dbs]$ crsctl start has

CRS-4123: Oracle High Availability Services has been started.

Now our standalone grid infrastructure is back to normal.

Amit's Oracle DBA Blog

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Tuesday, 20 July 2021

Steps For Changing Public Hostname For A Standalone Grid Infrastructure

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