Generic Host HTTPS monitor

Hello Zuke.

To set a custom HTTPS with specific host header you can set 3 different https monitors

ltm monitor https https_1 {
    adaptive disabled
    defaults-from https
    destination *:*
    interval 5
    ip-dscp 0
    recv 200\sOK
    recv-disable none
    send "GET / HTTP/1.1\r\nHost: myapp1.domain.com\r\nConnection: Close\r\n\r\n"
    time-until-up 0
    timeout 16
}
 
ltm monitor https https_2 {
    adaptive disabled
    defaults-from https
    destination *:*
    interval 5
    ip-dscp 0
    recv 200\sOK
    recv-disable none
    send "GET / HTTP/1.1\r\nHost: myapp2.domain.com\r\nConnection: Close\r\n\r\n"
    time-until-up 0
    timeout 16
}
 
ltm monitor https https_3 {
    adaptive disabled
    defaults-from https
    destination *:*
    interval 5
    ip-dscp 0
    recv 200\sOK
    recv-disable none
    send "GET / HTTP/1.1\r\nHost: myapp3.domain.com\r\nConnection: Close\r\n\r\n"
    time-until-up 0
    timeout 16
}

And finally configure the pool to consider UP if at least one of them is OK (including all the monitors in the list).

ltm pool mypool {
  members {
    172.16.20.1:https {
      address 172.16.20.1
      session monitor-enabled
      state up
    }
    172.16.20.2:https {
      address 172.16.20.2
      session monitor-enabled
      state up
    }
    172.16.20.3:https {
      address 172.16.20.3
      session monitor-enabled
      state up
    }
  }
  monitor min 1 of { https_1 https_2 https_3 }
}

BTW, use "200\sOK" as received string.

REF - https://support.f5.com/csp/article/K5917

Let me know if this is helpful.

KR,

Dario.