Could not resolve the DNS issue

SUSE Product Topics SLES Networking
1

Hi Experts,

I am new to SUSE LInux and I am trying to install SAP system.
I am facing the below issue while starting installation.

Problem with the DNS configuration: could not determine the DNS domain of host localhost

Below are config details: If i do nslookup to local host it is resolving.

localhost:~ # nslookup localhost
Server: 62.241.198.246
Address: 62.241.198.246#53

Non-authoritative answer:
Name: localhost
Address: 127.0.0.1

Under network settings, hostname is mentioned localhost and domain mentioned as suse by default.
iN this case it is not resolving.

localhost:~/saptemp # nslookup localhost.suse

Server: 62.241.198.246

Address: 62.241.198.246#53

**
server can’t find localhost.suse: NXDOMAIN

======================================
more /etc/resolv.conf

/etc/resolv.conf

search pp.htv.fi

nameserver 62.241.198.246

nameserver 62.241.198.245

What could be the issue in this case?
I am not linux admin, if some can help on this would be great.

Thanks in advance.

2

Hi
You should be using a FQDN (Fully Qualified Domain Name) the .suse is just for local use and temporarily until you set your hostname and domain. This is normally done via YaST network settings against the interface(s) in use.

I normally set mine also in the /etc/hosts file against 127.0.0.2

For example;

hostname -f

oscar.homelinux.org


dig oscar.homelinux.org @gekkota-dns1

; <<>> DiG 9.11.2 <<>> oscar.homelinux.org @gekkota-dns1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7080
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;oscar.homelinux.org.		IN	A

;; ANSWER SECTION:
oscar.homelinux.org.	2	IN	A	192.168.10.80

;; Query time: 5 msec
;; SERVER: 192.168.10.3#53(192.168.10.3)
;; WHEN: Fri Oct 18 16:25:20 CDT 2019
;; MSG SIZE  rcvd: 64
3

Hi Malcolmlewis,

Thanks for your response.
Below is current status. Still i am unable to resolve DNS by giving this way: nslookup sapecc
Something I am missing which i am unable to trace it out.
Seeking more help on this.

apecc:/etc # dig sapecc.chandra.com

; <<>> DiG 9.9.6-P1 <<>> sapecc.chandra.com

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25110

;; flags: qr rd ra
; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:
; udp: 4096

;; QUESTION SECTION:

;sapecc.chandra.com. IN A

;; ANSWER SECTION:
sapecc.chandra.com. 300 IN A 64.99.80.121

;; Query time: 272 msec

;; SERVER: 62.241.198.246#53(62.241.198.246)

;; WHEN: Sat Oct 19 10:14:24 EDT 2019

;; MSG SIZE rcvd: 63

==========================

sapecc:/etc # nslookup sapecc.chandra.com

Server: 62.241.198.246

Address: 62.241.198.246
#53

Non-authoritative answer:

Name: sapecc.chandra.com

Address: 64.99.80.121

============================

Host file:

IP-Address Full-Qualified-Hostname Short-Hostname

127.0.0.1 sapecc.chandra.com sapecc
#127.0.0.1 localhost

special IPv6 addresses

::1 localhost ipv6-localhost ipv6-loopback

fe00::0 ipv6-localnet

ff00::0 ipv6-mcastprefix

ff02::1 ipv6-allnodes

ff02::2 ipv6-allrouters

ff02::3 ipv6-allhosts

4

Hi
The 127.0.0.1 and localhost are important, move your hostname and fqdn to 127.0.0.2 instead.

It all resolves here, so it must be your DNS servers that are the issue…

nslookup sapecc.chandra.com

Server:		192.168.10.3
Address:	192.168.10.3#53

Non-authoritative answer:
Name:	sapecc.chandra.com
Address: 64.99.80.121

dig sapecc.chandra.com @8.8.8.8

; <<>> DiG 9.11.2 <<>> sapecc.chandra.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43799
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;sapecc.chandra.com.		IN	A

;; ANSWER SECTION:
sapecc.chandra.com.	299	IN	A	64.99.80.121

;; Query time: 114 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sat Oct 19 11:10:16 CDT 2019
;; MSG SIZE  rcvd: 63
5

By the way, SLES11 is in last phase of support (even for SAP-based one) and it is highly recommended to switch either to SLES12SP4 or even ro SLES15SP1.

6

Hi
LTSS goes to 31 Mar 2022 for SUSE Linux Enterprise Server for SAP Applications 11 SP4. It’s already out of general support…

7

Hi Malcolm,

Thanks for your help and pointed to help on the issue in the right direction.
Finally I am able to solve with your help.
It is the problem in DNS setting where currently it was to Auto mode to obtain IP automatically.
This was the issue which was causing this. I have changed to static by assigning IP.
Thanks for your help once again:)