Issues while Add / Delete RAC Node in Oracle 10g R2

Question

Hi,
I have an requirement to add a New Node in the existing 2 Node RAC at Production, where 1 Node is Active & other one is passive due to licence issue & cannot keep both the nodes as active. Due to performance issues (Memory , CPU Cores ..etc) we are adding another new node.
Right now we are planning to add a 3rd database node making the new node as active and current active one as passive which is a swap & later on after final observation delete and decommission the current passive node.
This activity is checked at the Dev database with the same infrastructure (OS + Memory ..etc) but want to check what is the best approach (or) challenges we face during the RAC Node Addition / Deletion
RAC DB Version : 10.2.o.4
OS Version : RHEL 5.8
(1) Is the approach is right one , First Adding the node & later on delete
(2) If the approach is the correct , what would be the behavious of the 3rd node in means of active (or) passive
(3) We have taken RMAN backup , OS backup , CRS , ORACLE_HOME , ASM_Home backup , OCR & VD.
(4) Could you please give detail steps for adding / deleting node in 10g R2.
(5) Are they any known bugs to us with the DB release (or) OS while performing this activity.
Since this is a production machine we want to more proactive . Please correct or add any thing i am missing out ...
With Thanks,
Rakesh

Answer 1

Hello Rakesh,
Please follow the following steps.
Node Addition Steps
1. Install and configure OS and hardware for new node.
2. Add Oracle Clusterware to the new node.
3. Configure ONS for the new node.
4. Add ASM home to the new node.
5. Add Databse home to the new node.
6. Add a listener to the new node.
7. Add ASM instance to the New Node.
8. Add a database instance to the new node.
Details of steps
1. run cluvfy to verify whether New node is ready for addition or not.
     $ cluvfy stage -pre crsinst -n node2
2. from node1, execute
          $/u01/app/crs11g/oui/bin/addNode.sh
3. Specify node2 vip address and follow instructions.
4. In the last of installtion it may through an wornig and will ask to click on YES. click on YES
5. from node1,
          /u01/app/crs11g/bin/racgons add_config node2:6200
6. from Node1,set ORACLE_HOME=ASM_HOME and then execute addNode.sh from $ASM_HOME/oui/bin and Follow instrusctions.
7. From node1, set ORACLE_HOME=DB_HOME and then
     /u01/app/oracle/product/11.1.0/db_1/oui/bin/addNode.sh
     and Follow instructions.
8. from node2 start NETCA and configure listener for new node. While configuring Listener select the name of new node.
9. from node1 start dbca from ASM Home to configure ASM instance for new node.
10. Again from node1 start dbca from DB Home to add DB instance
Node deletion Steps
1. Delete the Database instance on the node to be deleted.
2. Clean up the ASM instance.
3. Remove the listener from the node to be deleted.
4. Remove the node from the database.
5. Remove the node from ASM.
6. Remove ONS configuration from the node to be deleted.
7. Remove the node from the clusterware
Details of Steps
1. Remove database Instance of node2
     Dbca -> instance Management -> delete instance -> password for sys -> select node -> finish.
2. Stop asm for node2 from any nodes.
     $srvctl stop asm –n node2
3. Remove asm for node2
     $ srvctl remove asm -n node2
4. Remove Listener from Node2 using NETCA.
5. From Node2:
          ./runInstaller -updateNodeList ORACLE_HOME=$ORACLE_HOME "CLUSTER_NODES=node2" -local
6. From Node2, start runinstaller from Oracle_DB_Home/oui/bin, and remove "DB_HOME"
     $ ./runinstaller
     On the WELCOME Screen -> Deinstall product -> Select dbhome name (OraDb10g_Home1) -> Remove
7. From Node1:
          ./runInstaller -updateNodeList ORACLE_HOME=$ORACLE_HOME "CLUSTER_NODES=node1"
8. From Node2, set Oracle_Home to asm_1 and then fire:
          ./runInstaller -updateNodeList ORACLE_HOME=$ORACLE_HOME "CLUSTER_NODES=node2" -local
9. From Node2, start OUI and deinstall ASM Home.
10. From Node1, Set ORACLE_HOME= /u01/app/oracle/product/11.1.0/asm_1
11. From Node1: from /u01/app/oracle/product/11.1.0/asm_1/oui/bin, start OUI
          ./runInstaller -updateNodeList ORACLE_HOME=$ORACLE_HOME "CLUSTER_NODES=node1"
12. From Node2: as a root user (#) execute rootdelete.sh from /u01/app/crs11g/install
     # /u01/app/crs11g/install/rootdelete.sh
13.From Node-1 first find out the node numbers
     # /u01/app/crs11g/bin/olsnodes -n
     output : node1 1
          node2 2
14. From Node-1 as a root user (#):
     # /u01/app/crs11g/install/rootdeletenode.sh node2[Node_Name] 2[node_no]
     output:
          CRS nodeapps are deleted successfully
          clscfg: EXISTING configuration version 4 detected.
          clscfg: version 4 is 11 Release 1.
          Node deletion operation successful.
          'node2' deleted successfully
15. From Node2 set ORACLE_HOME=CRS_HOME and then execute
     $$ORACLE_HOME/oui/bin/runInstaller -updateNodeList ORACLE_HOME=$ORACLE_HOME "CLUSTER_NODES=node2" CRS=TRUE -local
16. ./runInstaller and remove CRS_HOME
17. From Node-1:
     $ /u01/app/crs11g/oui/bin/runInstaller -updateNodeList ORACLE_HOME=$ORACLE_HOME "CLUSTER_NODES=node1" CRS=TRUE
18. check node is deleted from ./crs_stat -t