Oracle Grid Infrastructure INS-20802 Oracle Cluster Verification Utility failed
issue-
Start both the nodes
Ping to both public and private ip’s
Configure dnsmasq (on both nodes)
Verify whether dnsmasq is installed
#rpm –qa |grep dnsmasq
Configure dnsmasq
create new file “/etc/racdns” with settings for SCAN
[root@rac1 ~]# cat /etc/racdns
# SCAN
192.168.56.91 rac12c-scan.premier.com rac12c-scan
192.168.56.92 rac12c-scan.premier.com rac12c-scan
192.168.56.93 rac12c-scan.premier.com rac12c-scan
[root@rac1 ~]#
modify dnsmasq default configuration file “/etc/dnsmasq.conf”. One parameter addn-hosts should be changed to point to file “/etc/racdns”.
#vi /etc/dnsmasq.conf
addn-hosts=/etc/racdns
#cat /etc/dnsmasq.conf | grep addn-hosts
addn-hosts=/etc/racdns
- Start dnsmasq
service dnsmasq start
chkconfig dnsmasq on
Next step is to resolve problem with file “/etc/resolv.conf”
I’m using third network card as NAT with DHCP so each time you restart network card or reboot host the file is overwritten with automatically generated settings. Nameserver points for 192.168.1.1 which is required to resolve internet entries but not enough to resolve SCAN settings via dnsmasq.
As default dnsmasq is running on ip adress 127.0.0.1 so it requires following settings in “/etc/resolv.conf”.
cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 127.0.0.1
search appsdba.info
You must protect the file from being automatically overwritten by host reboot, network card restart etc.
[root@racerp1 ~]# chattr +i /etc/resolv.conf
Verification
It’s just running nslookup to verify all is working fine
[root@rac1 ~]# nslookup rac12c-scan.premier.com
Server: 127.0.0.1
Address: 127.0.0.1#53
Name: rac12c-scan.premier.com
Address: 192.168.56.92
Name: rac12c-scan.premier.com
Address: 192.168.56.93
Name: rac12c-scan.premier.com
Address: 192.168.56.91
[root@rac1 ~]#
[root@rac1 ~]#
