Changing SCAN LISTENER from etc/hosts on Linux to use DNS which mean the from one IP to 3 IPs
The SCAN listener will remain the same without any change therefore like i mentioned before the these steps only provide changing for SCAN to use DNS.
“I Will not post any output”
the configuration for the IP should be added to DNS and to check this on OS level you should nslookup command :-
On node #1 run the below command to check the Listener status and see the current configuration:-
srvctl status scan
srvctl status scan_listener
srvctl config scan
srvctl config scan_listener
On node #2 run the below command to check the Listener status and see the current configuration:-
srvctl status scan
srvctl status scan_listener
srvctl config scan
srvctl config scan_listener
The output should be the same for both.
Stop all the listeners on your RAC as root :-
srvctl stop scan_listener
srvctl stop scan
srvctl status scan
srvctl status scan_listener
Remove or comment any entire in /etc/hosts after done stop the listener.
Let’s modify the scan :-
srvctl modify scan -n
srvctl modify scan_listener –u
Start listener :-
srvctl start scan
srvctl start scan_listener
srvctl status scan
srvctl status scan_listener
Thanks
Osama
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Published by Osama Mustafa
Osama considered as one of the leaders in Cloud technology, DevOps and database in the Middle-East. I have more than ten years of experience within the industry. moreover, certfied 4x AWS , 4x Azure and 6x OCI, have also obtained database certifications for multiple providers.
In addition to having experience with Oracle database and Oracle products, such as middle-ware, OID, OAM and OIM, I have gained substantial knowledge with different databases.
Currently, I am architecting and implementing Cloud and DevOps. On top of that, I'm providing solutions for companies that allow them to implement the solutions and to follow the best practices.
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