Forum Discussion

Nimbostratus

Apr 08, 2015

iRule to isolate node

I need help with an iRule. I have BigIP LTM v11.6 HF4 We have a webfarm configuration that runs a primary server node and several secondaries. What I want to accomplish, is to ensure that when s...

Nimbostratus

Apr 08, 2015

Thank you! If primary is offline, yes corp can \ should use secondary nodes. The two pool solution sounds good.

As I understand it, I should leave the pool that contains all members as the default pool for the virtual server, and then the iRule would handle the redirect to the pool that contains only the primary server.

At the pool level, the Priority Group activation should be set to "less than" 1 available member for the "new" primary only pool, but for the pool the contains all the nodes, Priority Group activation should remain disabled?

Sound correct?

Thanks again.

shaggy
Nimbostratus
Apr 13, 2015
There won't be a pool that contains only the primary server. The two pools would be - 1) a pool with all members and priority group activation enabled (less than 1, and the primary node has the highest priority) and 2) a pool with only secondary servers (no priority group activation). The default pool shouldn't matter since the iRule will make all pool decisions in this configuration. Does this VS have persistence enabled?