Forum Discussion
andrew_waldvoge
Nimbostratus
NimbostratusGTM Load Balancing between VS and CNAME
We are currently using Global Availability to LB between to Virtual Servers.
I need to add a CNAME to a CDN into the mix. Seems this is pretty doable through an iRule.
The problem with this is that we only use the CDN during peak hours so I need to be able to manually switch between the CNAME and the Virtual Servers. I guess this could be accomplished by adding and removing an iRule that references the CNAME as needed, but I am hoping there is an "easier" way similar to the way the Global Availability algorithm works with Virtual Servers.
Any suggestions would be appreciated, thanks.
2 Replies
- JRahm
Admin
You could do this in an iRule, just set your peak start/end times, then if { peak times } cname ... else { pool VirtServers } 
andrew_waldvogeJason, thanks for the suggestion. Unfortunately, the powers that be have forced me to leave it as a manual step.
I've implemented what seems to be the simplest solution by creating a CNAME pool along with the VS pool and, using Global Availability, ordering the pools accordingly.
Originally I just created a simple iRule that I could add and remove,
when DNS_REQUEST {
cname "url.example.net"
ttl 300
}
but it was just an extra thing to confuse the "operators" doing day to day DNS management.
