Forum Discussion

stan_peachey_86's avatar
stan_peachey_86
Icon for Cirrus rankCirrus
Oct 18, 2017
Solved

Is there a way to insert a HOST header in an HTTP 1.1 health monitor request?

I'm trying to create an HTTPS health monitor that verifies the same URL path (to an image file) for multiple pools. I'm trying to find a way to insert a host header of the pool members IPs being mon...
application delivery
BIG-IP DNS
LTM
  • stan_peachey_86's avatar
    stan_peachey_86
    Oct 18, 2017

    Due to concerns about the default vhost receiving health checks, I settled on using the correct service hostname in the GET and I can use the same health check on LTMs at both our datacenters. We will need to create a unique check/header for each new service, which is not terrible.

     

    current health check: GET /path/image.svg HTTP/1.1\r\nHost: service.domain.com\r\nConnection: Close\r\n\r\n

     

Lee_Sutcliffe's avatar
Lee_Sutcliffe
Icon for Nacreous rankNacreous
Oct 18, 2017

I've not tried this myself but I 'think' if you configure your pools as using FQDNs (Ephemeral pool) then the health monitor will attempt to use DNS.. whether this translates to the GET request in the monitor using the correct host name I don't know but I'd been curious to know.

 

If I get chance I may test this later on this evening.

 

MP