11gr2 Rac Install: Stuck at the DNS SCAN portion.

Question

Hi Guys, it's Xev.
Ok, I have followed his install guide to the dot. http://www.oracle-base.com/articles/11g/oracle-db-11gr2-rac-installation-on-oel5-using-virtualbox.php#install_grid_infrastructure
During the Grid Infrastructure install portion, it's stops me and tells me that "No Locally adapter is defined" when I am right here, it won't let me past this point right below...
http://www.oracle-base.com/articles/11g/images/ol5-112-rac/47-grid-ssh-connectivity.jpg
Now, this install document, tells you to put the 3 SCAN Ip addresses in the /ect/hosts file and does not tell you that you need to install DNS on a server and configure it, or does he? The way he says it to
me just doesn't make sense.
My question is to only people that have actually installed 11gr2 RAC using VirtualBox and using oracle linux 5.8.
He says in the install document this right here, but some how i think he is just flat out wrong.
I quote from the install document,,,
If you are not using DNS, the "/etc/hosts" file must contain the following information.
127.0.0.1 localhost.localdomain localhost
# Public
192.168.0.101 ol5-112-rac1.localdomain ol5-112-rac1
192.168.0.102 ol5-112-rac2.localdomain ol5-112-rac2
# Private
192.168.1.101 ol5-112-rac1-priv.localdomain ol5-112-rac1-priv
192.168.1.102 ol5-112-rac2-priv.localdomain ol5-112-rac2-priv
# Virtual
192.168.0.103 ol5-112-rac1-vip.localdomain ol5-112-rac1-vip
192.168.0.104 ol5-112-rac2-vip.localdomain ol5-112-rac2-vip
# SCAN
192.168.0.105 ol5-112-scan.localdomain ol5-112-scan
192.168.0.106 ol5-112-scan.localdomain ol5-112-scan
192.168.0.107 ol5-112-scan.localdomain ol5-112-scan
Note. The SCAN address should not really be defined in the hosts file. Instead is should be defined on the DNS to round-robin between 3 addresses on the same subnet as the public IPs. For this installation, we will compromise and use the hosts file. This is not possible if you are using 11.2.0.2 onward.
If you are using DNS, then only the first line needs to be present in the "/etc/hosts" file. The other entries are defined in the DNS, as described here. Having said that, I typically include all but the SCAN addresses..
END QUOTE.
So, Guys, what does he actually mean with this? MY Grid install fails when it's trying to resolved the scan. DO I need to install DNS like he gives in the link above, OR can the install work with the SCAN in the /ect/hosts file? I Personally think this is just wrong, and you have to have DNS working 3 ip round-robin for the SCAN to work.
Please only reply to this thread if you have actually successfully installled 11rg2 Rac (11.0.1) on Oracle Linux 5.8 using VirtualBox, or actually know where i am going wrong by your own experience, not just goggle searching.....but you got it to work....
I am begging on my knees for help with this, since I have been at this for weeks now.
If you help me through this, I'll be your friend
Xev.

Answer 1

Hi Shivendra,
I followed the instructions on shivenracdba: configure DNS for Installtion of Oracle Grid Infrastructure RAC cluster
named starts right up with no errors, but when i try to do the nslookups for both nodes and the scan cluster it fails with these errors...
This is what happens on rac, the primary node.
[oracle@rac1 grid]$ nslookup rac
;; Got SERVFAIL reply from 192.168.72.129, trying next server
;; Got SERVFAIL reply from 192.168.72.129, trying next server
Server:         192.168.72.128
Address:        192.168.72.128#53
** server can't find rac: SERVFAIL
[oracle@rac1 grid]$ nslookup rac2
;; Got SERVFAIL reply from 192.168.72.129, trying next server
;; Got SERVFAIL reply from 192.168.72.129, trying next server
Server:         192.168.72.128
Address:        192.168.72.128#53
** server can't find rac2: SERVFAIL
[oracle@rac1 grid]$ nslookup rac-cluster-scan
;; Got SERVFAIL reply from 192.168.72.129, trying next server
;; Got SERVFAIL reply from 192.168.72.129, trying next server
Server:         192.168.72.128
Address:        192.168.72.128#53
** server can't find rac-cluster-scan: SERVFAIL
This is what happens on rac2, the secondary node.
[oracle@rac2 ~]$ nslookup rac
;; Got SERVFAIL reply from 192.168.72.129, trying next server
;; Got SERVFAIL reply from 192.168.72.129, trying next server
Server:         192.168.72.128
Address:        192.168.72.128#53
** server can't find rac: SERVFAIL
[oracle@rac2 ~]$ nslookup rac2
;; Got SERVFAIL reply from 192.168.72.129, trying next server
;; Got SERVFAIL reply from 192.168.72.129, trying next server
Server:         192.168.72.128
Address:        192.168.72.128#53
** server can't find rac2: SERVFAIL
[oracle@rac2 ~]$ nslookup rac-cluster-scan
;; Got SERVFAIL reply from 192.168.72.129, trying next server
;; Got SERVFAIL reply from 192.168.72.129, trying next server
Server:         192.168.72.128
Address:        192.168.72.128#53
** server can't find rac-cluster-scan: SERVFAIL
Now, this is what I for all the files that I have configured......I hope they are right?
Do i need to run the named DNS server on both nodes? It's running on both nodes now...and the service starts..
Here are all my files that pertain to the DNS configuration for RAC.
These are the files that are on "rac" the primary node....
[root@rac1 named]# cat forward.zone
$TTL 86400
@          IN     SOA    rac.  rac. (
                         42 ; serial (d. adams)
                         3H ; refresh
                        15M ; retry
                         1W ; expiry
                         1D ) ; minimum
@          IN   NS     rac.
rac       IN   A      192.168.72.128
localhost                     IN A    127.0.0.1
rac2                          IN A    192.168.72.129
rac-vip                       IN A    192.168.72.102
rac2-vip                      IN A    192.168.72.104
rac-cluster-scan              IN A    192.168.72.106
rac-cluster-scan              IN A    192.168.72.107
rac-cluster-scan              IN A    192.168.72.108
[root@rac1 named]# cat reverse.zone
$TTL 86400
@        IN     SOA    rac.  rac. (
                         42 ; serial (d. adams)
                         3H ; refresh
                        15M ; retry
                         1W ; expiry
                         1D ) ; minimum
@         IN   NS   rac.
128.72.168.192      IN   PTR  rac.
1.0.0.127           IN   PTR  localhost.
129.72.168.192      IN   PTR  rac2.
102.72.168.192      IN   PTR  rac-vip.
104.72.168.192      IN   PTR  rac2-vip.
106.72.168.192      IN   PTR  rac-cluster-scan.
107.72.168.192      IN   PTR  rac-cluster-scan.
108.72.168.192      IN   PTR  rac-cluster-scan.
[root@rac1 named]# cat named.rfc1912.zones
zone "rac" IN {
                 type master;
                 file "forward.zone";
zone "72.168.192.in-addr.arpa" IN {
                 type master;
                 file "reverse.zone";
[root@rac1 named]# cd /var/named/chroot/etc
[root@rac1 etc]# ls
named.conf
[root@rac1 etc]# cat named.conf
options {
listen-on port 53 { 192.168.72.128; };
# listen-on-v6 port 53 { ::1; };
        directory "/var/named";
        recursion yes;
logging {
        channel default_debug {
        file "data/named.run";
        severity dynamic;
  include "named.rfc1912.zones";
[root@rac1 etc]# cat /etc/resolv.conf
# Generated by NetworkManager
# No nameservers found; try putting DNS servers into your
# ifcfg files in /etc/sysconfig/network-scripts like so:
# DNS1=xxx.xxx.xxx.xxx
# DNS2=xxx.xxx.xxx.xxx
# DOMAIN=lab.foo.com bar.foo.com
search rac2
search rac
nameserver 192.168.72.129
nameserver 192.168.72.128
and this is the content of my /ect/hosts file on rac, the primary node.
[root@rac1 etc]# cd /etc
[root@rac1 etc]# cat hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               rac1.localdomain rac1 localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
#eth1 - PUBLIC
192.168.72.128 rac
192.168.72.129 rac2
#VIP
192.168.72.102 rac-vip
192.168.72.104 rac2-vip
#eth2 - PRIVATE
192.168.140.128 rac-pvt
192.168.140.129 rac2-pvt
These are the files that are on "rac2" the secondary node....
[root@rac2 named]# cat forward.zone
$TTL 86400
@          IN     SOA    rac.  rac. (
                         42 ; serial (d. adams)
                         3H ; refresh
                        15M ; retry
                         1W ; expiry
                         1D ) ; minimum
@          IN   NS     rac.
rac       IN   A      192.168.72.128
localhost                     IN A    127.0.0.1
rac2                          IN A    192.168.72.129
rac-vip                       IN A    192.168.72.102
rac2-vip                      IN A    192.168.72.104
rac-cluster-scan              IN A    192.168.72.106
rac-cluster-scan              IN A    192.168.72.107
rac-cluster-scan              IN A    192.168.72.108
[root@rac2 named]# cat reverse.zone
$TTL 86400
@        IN     SOA    rac.  rac. (
                         42 ; serial (d. adams)
                         3H ; refresh
                        15M ; retry
                         1W ; expiry
                         1D ) ; minimum
@         IN   NS   rac.
128.72.168.192      IN   PTR  rac.
1.0.0.127           IN   PTR  localhost.
129.72.168.192      IN   PTR  rac2.
102.72.168.192      IN   PTR  rac-vip.
104.72.168.192      IN   PTR  rac2-vip.
106.72.168.192      IN   PTR  rac-cluster-scan.
107.72.168.192      IN   PTR  rac-cluster-scan.
108.72.168.192      IN   PTR  rac-cluster-scan.
[root@rac2 named]# cat named.rfc1912.zones
zone "rac" IN {
                 type master;
                 file "forward.zone";
zone "72.168.192.in-addr.arpa" IN {
                 type master;
                 file "reverse.zone";
[root@rac2 etc]# cat named.conf
options {
listen-on port 53 { 192.168.72.129; };
# listen-on-v6 port 53 { ::1; };
        directory "/var/named";
        recursion yes;
logging {
        channel default_debug {
        file "data/named.run";
        severity dynamic;
  include "named.rfc1912.zones";
[root@rac2 etc]# cd /etc
[root@rac2 etc]# cat resolv.conf
# Generated by NetworkManager
# No nameservers found; try putting DNS servers into your
# ifcfg files in /etc/sysconfig/network-scripts like so:
# DNS1=xxx.xxx.xxx.xxx
# DNS2=xxx.xxx.xxx.xxx
# DOMAIN=lab.foo.com bar.foo.com
search rac2
search rac
nameserver 192.168.72.129
nameserver 192.168.72.128
[root@rac2 ~]# cd /etc
[root@rac2 etc]# cat hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               rac2.localdomain rac2 localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
#eth1 - PUBLIC
192.168.72.128 rac
192.168.72.129 rac2
#VIP
192.168.72.102 rac-vip
192.168.72.104 rac2-vip
#eth2 - PRIVATE
192.168.140.128 rac-pvt
192.168.140.129 rac2-pvt
That is everything on both nodes...
Shivendra, what am I to do??