Discussions
Categories
- 17.9K All Categories
- 3.4K Industry Applications
- 3.4K Intelligent Advisor
- 75 Insurance
- 537.6K On-Premises Infrastructure
- 138.7K Analytics Software
- 38.6K Application Development Software
- 6.1K Cloud Platform
- 109.6K Database Software
- 17.6K Enterprise Manager
- 8.8K Hardware
- 71.3K Infrastructure Software
- 105.4K Integration
- 41.6K Security Software
Want to configure DNS for my RAC setup
Dear RAC Experts,
Already RAC DB is up and running on my laptop.
I am trying to configure DNS for RAC setup.
Quesions
1) Can i use yum to download (bind* cach *) packages ?
2) named.conf files is NOT existing on my server.
>> Linux Machine details
[[email protected] ~]# cat /etc/*release
Red Hat Enterprise Linux Server release 5.7 (Tikanga)
[[email protected] ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
#::1 localhost6.localdomain6 localhost6i
# Public IP
192.168.212.40 rac1 rac1.example.com
192.168.212.41 rac2 rac2.example.com
# Private IP
10.0.0.1 rac1-priv
10.0.0.2 rac2-priv
# Virtual IP
192.168.212.70 rac1-vip
192.168.212.71 rac2-vip
# Scan IP
192.168.212.90 rac-scan
>>
[[email protected] ~]$ crsctl check cluster -all
**************************************************************
rac1:
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
rac2:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
[[email protected] ~]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node rac2
But i found no files to setup DNS for my system.
Answers
-
[[email protected] ~]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node rac2
But i found no files to setup DNS for my system.
You are not using DNS, but a host-file only.
In order to overcome the installation requirement without setting up a DNS-based SCAN resolution, you can use a hosts-file based workaround. In this case, you would use a typical hosts-file entry to resolve the SCAN to only 1 IP address and one IP address only.
To install and configure DNS just follow this link:
https://oracle-base.com/articles/linux/dns-configuration-for-scan
-
Hi ,
I am using RHEL 5.7 (personal Laptop)
In may case, is it possible to download following packages using yum ?
yum install bind-libs bind bind-utils
# yum install system-config-bind
[[email protected] ~]# yum install bind-libs bind bind-utils
Loaded plugins: product-id, security, subscription-manager
Updating Red Hat repositories.
Setting up Install Process
No package bind available.
Nothing to do
[[email protected] ~]# yum install system-config-bind
Loaded plugins: product-id, security, subscription-manager
Updating Red Hat repositories.
Setting up Install Process
No package system-config-bind available.
Nothing to do
How do i process further ?
-
Hi,
Levi posted a link to a website.
Please follow the steps mentioned there.
Regards
Markus
-
Hi,
I am unable to download any packages on RHEL and OEL
[[email protected] ~]# yum install bind-libs bind bind-utils
Loaded plugins: rhnplugin, security
This system is not registered with ULN.
ULN support will be disabled.
Setting up Install Process
No package bind available.
Nothing to do
[[email protected] ~]# yum install bind*
Loaded plugins: rhnplugin, security
This system is not registered with ULN.
ULN support will be disabled.
Setting up Install Process
Nothing to do
-
Message "This system is not registered with ULN."
==> google
==> https://flashdba.com/2012/10/08/this-system-is-not-registered-with-uln-rhn/
-
People have written books how to setup and configure DNS servers. It is not rocket science to setup a cache-only name server, but you still have to understand how DNS fits into your network infrastructure. If you do not configure DNS correctly, you will not be able to connect to the Internet, for example. There are also security concerns you have to be aware off, since other name servers or firewall configurations may not accept requests from your own DNS service.
Installing DNS depends on your OS release. What you are using may apply to RHEL 6, but not 5. I don't have an old OL 5 running at the moment, but the command you can use to install the software is probably the following:
# yum install bind caching-nameserver
You will then need to configure /etc/named.conf to setup your authoritative zone (domain name, e.g. example.com), which needs to forward requests for other records to your corporate or public DNS server. It also means you need to create the necessary addr-arpa configuration files to include the forward and reverse lookup addresses for the computers you require.
Why bother for your purpose? From what I can tell, considering all you past posts regarding RAC, I think you have enough trouble installing and configuring Oracle RAC. Why do you want to add DNS on top of it, which is yet another skill set? It will be easier for you just to manage the /etc/hosts file on each of your RAC nodes.
-
Hi Dude,
I am getting too much confusion to configure DNS.
Basically i am NOT a UNIX admin but an Oracle DBA.
Now i am planning to install RAC on OEL 6.x
I think 6.9 is NOT compatible for vmbox.
I am planning to install 12.2.0.1 RAC on 6.5 with DNS setup.
[[email protected] yum.repos.d]# yum install bind caching-nameserver
Loaded plugins: rhnplugin, security
This system is not registered with ULN.
ULN support will be disabled.
Setting up Install Process
No package bind available.
No package caching-nameserver available.
Nothing to do
Do i need ULN registration for further setup, if i go for OEL 6.5 ?
-
You do not need ULN registration regardless.
-
Now i am planning to install RAC on OEL 6.xI think 6.9 is NOT compatible for vmbox.
Whatever you choose, be sure to mention your set up since installation and procedures are different between major OS release versions. I'm not aware that 6.9 was incompatible with either VirtualBox or VMware, unless you are using some unreasonably old and ancient version.
And btw, it's OL not OEL.
-
No, you don't need ULN registration. Please read https://flashdba.com/2012/10/08/this-system-is-not-registered-with-uln-rhn/
