In this article I will show how to reconfigure IP addresses in public network for RAC. `
First we have to close all cluster resources
[oracle@lodzio ~]$ crsctl stop res -all
This command can hang on stopping ASM. It’s normal, because the resource CRSD is using OCR, which is located on ASM diskgroup. In ASM alertlog you will see errors like:
ORA-15032: not all alterations performed
ORA-15027: active use of diskgroup "GRIDASM" precludes its dismount
ERROR: ALTER DISKGROUP GRIDASM DISMOUNT /* asm agent *//* {1:57617:368} */
You can resolve this by restarting CRSD – execute below commands on all nodes:
[oracle@miodzio ~]$ crsctl stop res ora.crsd -init CRS-2673: Attempting to stop 'ora.crsd' on 'miodzio' [oracle@miodzio ~]$ crsctl start res ora.crsd -init CRS-2672: Attempting to start 'ora.asm' on 'miodzio'
Now reconfigure all network devices and make appropriate changes in DNS. Make sure that all names are resolved correctly.
Delete public network from cluster configuration:
[root@lodzio ~]# oifcfg delif -global eth0/192.168.0.0
And add new public network definition
[root@lodzio ~]# oifcfg setif -global eth0/192.168.56.0:public [root@lodzio ~]# oifcfg getif eth1 10.0.0.0 global cluster_interconnect eth0 192.168.56.0 global public
Now we can modify cluster resources:
[root@lodzio ~]# srvctl modify network -S 192.168.56.0/255.255.255.0/eth0 [root@lodzio ~]# srvctl modify nodeapps -n lodzio -A lodzio-vip/255.255.255.0/eth0 [root@lodzio ~]# srvctl modify nodeapps -n miodzio -A miodzio-vip/255.255.255.0/eth0 [root@lodzio ~]# srvctl modify scan -n scan.racdomain [root@lodzio ~]# srvctl config nodeapps Network exists: 1/192.168.56.0/255.255.255.0/eth0, type static VIP exists: /lodzio-vip/192.168.56.31/192.168.56.0/255.255.255.0/eth0, hosting node lodzio VIP exists: /miodzio-vip/192.168.56.32/192.168.56.0/255.255.255.0/eth0, hosting node miodzio GSD exists ONS exists: Local port 6100, remote port 6200, EM port 2016 [root@lodzio ~]# srvctl config scan SCAN name: scan.racdomain, Network: 1/192.168.56.0/255.255.255.0/eth0 SCAN VIP name: scan1, IP: /scan.racdomain/192.168.56.41 SCAN VIP name: scan2, IP: /scan.racdomain/192.168.56.42 SCAN VIP name: scan3, IP: /scan.racdomain/192.168.56.43
And start cluster resources:
[oracle@lodzio ~]$ crsctl start res -all