iRule (or ?) to Direct Traffic During Maintenance

Create a new monitor and new pool for each web application. Then forward traffic based on the path to the correct pool.

Example:

• App1 path = /dct/
• App2 path = /zct/
• App3 path = /yct/

Create a monitor per application.

Create a pool per application with the same pool members but assign the associated monitor.

Using iRule or Traffic Policy to select the pool based on the URL:

when HTTP_REQUEST {
    switch -glob [HTTP::uri] {
        /dct* {
            pool app1_dct_pool
        }
        /zct* {
            pool app2_zct_pool
        }
        /yct* {
            pool app3_yct_pool
        }
        default {
            # Using default assigned pool
            pool [LB::server pool]
        }
    }
}