Adding a Node To 10gR2 RAC cluster

Summary:

=============================================================

This presentation will provide detail steps for Oracle DBA and Linux Engineer to add new node to existing 10gR2 (10.2.0.3) database RAC.

The most critical steps that need to be followed are:

• Pre-install checking
• Adding an Oracle clusterware home to new nodes using OUI in interactive node
• Adding an Oracle home to new nodes using OUI in interactive mode
• Reconfigure listener on new node using NETCA
• Adding ASM instance to new nodes manually

Part I: Pre-install checking

1. Verify cluster healthy on existing nodes (ocrcheck, cluvfy)

2. Check OS version, Kernel parameters, /etc/hosts file and ensure they are identical on all nodes

3. Cross check ssh login on all nodes

4. Cross ping hostname and hostname-pn on all nodes

5. Copy .profile from existing node to new node

6. Ensure ocr, css files and shared ASM disk are visible from new node and have right permission

7. Backup crs, ocr and oraInventory on existing nodes

8. Change permission on $ORA_CRS_HOME/bin/vipca.orig and $ORA_CRS_HOME/bin/srvctl.orig on existing node

change permission from

$ ls -lrat *.orig

-rwxr-x--x 1 root users 5380 Feb 27 2007 vipca.orig

-rwxr-x--x 1 root users 5800 Feb 27 2007 srvctl.orig

to

$ls -lrat *.orig

-rwxr-x--x 1 oracle oinstall 5380 2007-02-27 18:47 vipca.orig

-rwxr-x--x 1 oracle oinstall 5800 2007-02-27 18:47 srvctl.orig

9. Comment out two lines below in $ORA_CRS_HOME/bin/srvctl on existing nodes

#LD_ASSUME_KERNEL=2.4.19

#export LD_ASSUME_KERNEL

10. Add "unset LD_ASSUME_KERNEL" in $ORA_CRS_HOME/bin/vipca line 126

Step9 and 10 are 10.2.0.3 specific. The issue is fixed on 10.2.0.4. Please reference Oracle metalink Doc ID: Note:414163.1 -- 10gR2 RAC Install issues on Oracle EL5 or RHEL5 or SLES10 (VIPCA Failures)

11. Ensure $ORACLE_BASE directory exist on new node with correct permission

Part II: Adding an Oracle Clusterware Home to a New Node Using OUI in Interactive Mode

=============================================================Ensure that you have successfully installed Oracle Clusterware on at least one node in your cluster environment. To use these procedures as shown, your $ORA_CRS_HOME environment variable must identify your successfully installed Oracle Clusterware home.

1. Set the DISPLAY environment variable and run the addNode.sh script from existing node (node1)

. ./ .profile

DISPLAY=ipaddress:0.0; export DISPLAY

cd $ORA_CRS_HOME/oui/bin

./addNode.sh

2.The Oracle Universal Installer (OUI) displays the Node Selection Page

3. Enter the node that you want to add and verify the entries that OUI displays on the Summary Page click Next.

4. Monitor the progress of the copy crs home to new node and verify the total size of the CRS directory

5. Execute configuration scripts by root users

a. Run the orainstRoot.sh script on the new node if OUI prompts you to do so.

ausdfsgriddb10:/u01/app/oracle/oraInventory # ./orainstRoot.sh

Changing permissions of /u01/app/oracle/oraInventory to 770.

Changing groupname of /u01/app/oracle/oraInventory to oinstall.

The execution of the script is complete

b. Run the rootaddNode.sh script from the $ORA_CRS_HOME/install/ directory on the node from which you are running OUI.

ausdfsgriddb01:/u01/app/oracle/product/10.2.0/crs_1/install # ./rootaddnode.sh

clscfg: EXISTING configuration version 3 detected.

clscfg: version 3 is 10G Release 2.

Attempting to add 1 new nodes to the configuration

Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897.

node :

node 10: ausdfsgriddb10 ausdfsgriddb10-pn ausdfsgriddb10

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

Operation successful.

/u01/app/oracle/product/10.2.0/crs_1/bin/srvctl add nodeapps -n ausdfsgriddb10 -A ausdfsgriddb10-vip.us.dell.com/255.255.240.0/eth0 -o /u01/app/oracle/product/10.2.0/crs_1

c. Run the root.sh script on the new node from $ORA_CRS_HOME to start Oracle Clusterware on the new node.

ausdfsgriddb10:/u01/app/oracle/product/10.2.0/crs_1 # ./root.sh

WARNING: directory '/u01/app/oracle/product/10.2.0' is not owned by root

WARNING: directory '/u01/app/oracle/product' is not owned by root

WARNING: directory '/u01/app/oracle' is not owned by root

Checking to see if Oracle CRS stack is already configured

/etc/oracle does not exist. Creating it now.

OCR LOCATIONS = /u02/oradata/ocr1,/u02/oradata/ocr2

OCR backup directory '/u01/app/oracle/product/10.2.0/crs_1/cdata/dfsddeamercrs' does not exist. Creating now

Setting the permissions on OCR backup directory

Setting up NS directories

Oracle Cluster Registry configuration upgraded successfully

WARNING: directory '/u01/app/oracle/product/10.2.0' is not owned by root

WARNING: directory '/u01/app/oracle/product' is not owned by root

WARNING: directory '/u01/app/oracle' is not owned by root

clscfg: EXISTING configuration version 3 detected.

clscfg: version 3 is 10G Release 2.

Successfully accumulated necessary OCR keys.

Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897.

node :

node 1: ausdfsgriddb01 ausdfsgriddb01-pn ausdfsgriddb01

node 2: ausdfsgriddb02 ausdfsgriddb02-pn ausdfsgriddb02

node 3: ausdfsgriddb03 ausdfsgriddb03-pn ausdfsgriddb03

node 4: ausdfsgriddb04 ausdfsgriddb04-pn ausdfsgriddb04

node 5: ausdfsgriddb05 ausdfsgriddb05-pn ausdfsgriddb05

node 6: ausdfsgriddb06 ausdfsgriddb06-pn ausdfsgriddb06

node 7: ausdfsgriddb07 ausdfsgriddb07-pn ausdfsgriddb07

node 8: ausdfsgriddb08 ausdfsgriddb08-pn ausdfsgriddb08

clscfg: Arguments check out successfully.

NO KEYS WERE WRITTEN. Supply -force parameter to override.

-force is destructive and will destroy any previous cluster

configuration.

Oracle Cluster Registry for cluster has already been initialized

Startup will be queued to init within 30 seconds.

Adding daemons to inittab

Expecting the CRS daemons to be up within 600 seconds.

CSS is active on these nodes.

ausdfsgriddb01

ausdfsgriddb02

ausdfsgriddb03

ausdfsgriddb04

ausdfsgriddb05

ausdfsgriddb06

ausdfsgriddb07

ausdfsgriddb08

ausdfsgriddb09

ausdfsgriddb10

CSS is active on all nodes.

Waiting for the Oracle CRSD and EVMD to start

Oracle CRS stack installed and running under init(1M)

Running vipca(silent) for configuring nodeapps

Creating VIP application resource on (0) nodes.

Creating GSD application resource on (0) nodes.

Creating ONS application resource on (0) nodes.

Starting VIP application resource on (8) nodes.........

Starting GSD application resource on (8) nodes.........

Starting ONS application resource on (8) nodes.........

Done.

6. Verify crs is started on new node and nodeapps are started except for listener, and then exit OUI.

7. Obtain the remote port identifier, which you need to know for the next step, by running the following command on the existing node from the $ORA_CRS_HOME/opmn/conf directory:

$ cat $ORA_CRS_HOME/opmn/conf/ons.config

localport=6113

remoteport=6201

loglevel=3

useocr=on

9.From the $ORA_CRS_HOME/bin directory on an existing node, run the Oracle Notification Service (RACGONS) utility as in the following example where remote_port is the port number from the previous step and node2 is the name of the node that you are adding:

./racgons add_config New_Node:Remote_Port

Ex:

$ ./racgons add_config ausdfsgriddb10:6201

10. Move the Oracle created S96init.crs script to S11 and chkconfig init.crs off and then back on to ensure CRS will start properly during a reboot. Finally, reboot the node and confirm. (SE)

mv /etc/init.d/rc3.d/S96init.crs /etc/init.d/rc3.d/S11init.crs

chkconfig -e init.crs (Now within vi change to on and “:wq”)

chkconfig -e init.crs (Now within vi change to off and “:wq”)

chkconfig -e init.crs (Now within vi change to on and “:wq”)

Part III: Adding an Oracle Home to a New Node Using OUI in Interactive Mode

================================================

Ensure that you have successfully installed Oracle with the Oracle RAC software on at least one node in your cluster environment. To use these procedures as shown, your $ORACLE_HOME environment variable must identify your successfully installed Oracle home.

1. Go to $ORACLE_HOME/oui/bin and run the addNode.sh script on node1.

. ./ .profile

DISPLAY=ipaddress:0.0; export DISPLAY

cd $ORACLE_HOME/oui/bin

./addNode.sh

2. When OUI displays the Node Selection Page, select the node to be added and click Next.

3. Verify the entries that OUI displays on the Summary Page and click Next.

4.Run the root.sh script on the new node from Oracle_home when OUI prompts you to do so.

ausdfsgriddb10:/u01/app/oracle/product/10.2.0/db_1 # ./root.sh

Running Oracle10 root.sh script...

The following environment variables are set as:

ORACLE_OWNER= oracle

ORACLE_HOME= /u01/app/oracle/product/10.2.0/db_1

Enter the full pathname of the local bin directory: [/usr/local/bin]:

Copying dbhome to /usr/local/bin ...

Copying oraenv to /usr/local/bin ...

Copying coraenv to /usr/local/bin ...

Creating /etc/oratab file...

Entries will be added to the /etc/oratab file as needed by

Database Configuration Assistant when a database is created

Finished running generic part of root.sh script.

Now product-specific root actions will be performed.

Part IV: reconfigure listener on new node

On the new node, run the Oracle Net Configuration Assistant (NETCA) to add a Listener.

export DISPLAY=ipaddress:0.0

./netca &

Waiting for listener configuration to complete. Verify listener is up using srvctl

Part V: add ASM instance on new node manually

======================================================

a. add ASM entry in /etc/oratab on new node

+ASM10:/u01/app/oracle/product/10.2.0/db_1:N

b. modify init+ASM10.ora in /u01/app/oracle/product/10.2.0/db_1/dbs

cd /u01/app/oracle/product/10.2.0/db_1/dbs

mv init+ASM1.ora init+ASM10.ora

mv orapw+ASM1 orapw+ASM10

c. create admin directories for ASM instance

mkdir /u01/app/oracle/admin/+ASM/udump

cdump

hdump

bdump

pfile

d. copy init.ora to new node

cd /u01/app/oracle/admin/+ASM/pfile

scp ausdfsgriddb01:/u01/app/oracle/admin/+ASM/pfile/init.ora .

e. add new ASM instance in /u01/app/oracle/admin/+ASM/pfile/init.ora on all RAC nodes

+ASM10.instance_number=10

f. add ASM to cluster

srvctl add asm -n ausdfsgriddb10 -i +ASM10 –o /u01/app/oracle/product/10.2.0/db_1

g. start asm instance

srvctl start asm -n ausdfsgriddb10