Change VIP Hostname on Oracle RAC

This note is not intended as a means to change the Public or Private Hostnames themselves.  Public or Private hostnames can only be changed by removing/adding nodes, or reinstalling Oracle Clusterware.   VIP Hostnames can be changed, however.

- Check original  configuration before:

srvctl config nodeapps -n node1 -a

Assume, change from "test01-vip" to "test01-virtual"

Example:

# srvctl  config nodeapps -n test01 -a

VIP exists.: /test01-vip/192.168.254.88/255.255.255.0/eth0

-Stop Resources instance, asm and nodeapps

srvctl stop instance -d db -i db1

srvctl stop asm -n test01

srvctl stop nodeapps -n test01

- After that change DNS or hosts file. (192.168.254.88          test01-virtual) on this node and every nodes (RAC)

- Modify VIP hostname on nodeapps by using srvctl command-line (root user)

srvctl modify nodeapps -n [-o ] [-A ] 

Options Description: 

-n Node name. 

-o Oracle home for the cluster software (CRS-Home). 

-A The node level VIP address (/netmask[/if1[|if2|...]]). 

Example:

$ su - 

# srvctl  modify nodeapps -n test01 -A test01-virtual/255.255.255.0/eth0

- Start Resources  nodeapps, asm and instance

srvct start nodeapps -n test01

srvctl start asm -n test01

srvctl start instance -d db -i db1

- Don't forget to change VIP hostname on applications and client.

- Check... Check and Check..