8i | 9i | 10g | 11g | 12c | 13c | 18c | 19c | 21c | Misc | PL/SQL | SQL | RAC | WebLogic | Linux

Home » Misc » Here

Comments for Oracle Database 12c Release 1 (12.1) RAC On Oracle Linux 7 Using VirtualBox


David said...

Great work here Tim...

Rafael Assis said...

My DNS no found with o DNS:192.168.56.1, a change by 127.0.0.1 and then found.

Tim... said...

Hi.

That would only work if you put the DNS on each RAC node, which would work, but would be a silly idea for anything but a play system. I suggest using the DNS on the host machine, not the guests.

Cheers

Tim...

jag said...

I had same issue with DNS not able to resolve,
I made my DNS server 192.168.56.101, which works and also for DNSMASQ - you need to uncomment scan entries /etc/hosts (rather than /etc/host file) and /etc/resolve.conf file make nameserver 192.168.56.101

I have tried these on my MAC

Tim... said...

Jag:

Typo fixed. :)

Running Dnsmasq on the RAC node will lead to problems when doing failover testing. You turn off the node, you've lost the DNS? This is why it is better to have DNS on the host, or on another VM. You can run Dnsmasq on your Mac.

https://oracle-base.com/articles/misc/dnsmasq-for-simple-dns-configurations-mac-osx

That's what I do for my MAC. :)

Cheers

Tim...

Aleks said...

Hello,
thank you for this excellent article.

I got following arror after executing root.sh script on the second node ( on the first node it completed successfully )

CLSRSC-507: The root script cannot proceed on this node kvmrac2 because either the first-node operations have not completed on node kvmrac1 or there was an error in obtaining the status of the first-node operations.
>End Co

Tim... said...

Hi.

Don't know what to say really. It certainly seems the second node does not believe the config is complete on the first node. I would consider going back to your last snapshot and trying again.

Cheers

Tim...

Alessandro said...

Hi,
great tutorial as all blog. Compliments !!! Anyway I meant that 4TB of shared memory max (kernel.shmmax = 4398046511104). This is a big monster of database. Powerfull. :)

Anonymous said...

Hi Tim
I followed as you mentioned in the article for the DNS scan lookup but its not working for me, can you help me with this.

[root@ol7-121-rac1 ~]# nslookup ol7-121-scan
;; connection timed out; no servers could be reached

[root@ol7-121-rac1 ~]# nslookup ol7-121-scan.localdomain
;; connection timed out; no servers could be reached

[root@ol7-121-rac1 ~]#

Tim... said...

Hi.

If these lookups work from the host, but not the guests, your network setup is incorrect. If they don't work from the host, your DNS config is incorrect.

Cheers

Tim...

Anonymous said...

THe nslookup doesnt work from the VM also and my host is windows, can you help me in configuring the DNS correctly

Tim... said...

Not sure I can say more than I did here. I'm no expert at DNS. Just check your settings are correct for you subnet.

https://oracle-base.com/articles/linux/dns-configuration-for-scan

Cheers

Tim...

sergio.e.samayoa@gma said...

https://github.com/oraclebase/vagrant/tree/master/rac/ol7_121/README.md
About "Windows Host Build Failure (Workaround)"
Happens also in linux because by default DHCP server is enabled and with IP 192.168.56.200, to solve just disable it.

Tim... said...

Hi.

Thanks for the heads-up. I've made a note in the README.txt about it.

Cheers

Tim...

DO NOT ask technical questions here! They will be deleted!

These comments should relate to the contents of a specific article. Constructive criticism is good. Advertising and offensive comments are bad and will be deleted!

If you post personal information (name, email address etc.) you are agreeing to them being stored and displayed. Feel free to remain anonymous.