ICAP Monitor

Hi Pavlos,

 

 

You could capture a tcpdump of a simple ICAP request and response and handcraft a custom TCP send and receive string for a TCP monitor. Here is a solution detailing the escape sequences you can use in a monitor:

 

 

SOL4186: Entering escape sequences in an ECV health monitor's send and receive strings

 

http://support.f5.com/kb/en-us/solutions/public/4000/100/sol4186.html

 

 

Aaron

Unfortunately, I can't do that because monitor request must carry the Request Method "OPTIONS" and header "Host" which is different for every pool member.

 

 

Thanks for your reply.

 

 

Regards,

 

Pavlos

 

 

 

Hi Pavlos,

 

 

If it's a single static request/response, you should be able to configure a TCP send and receive string to monitor the ICAP servers. Does each server require a different Host header value? Or could you use a generic value for all of them? If the former, you could use a single TCP monitor. If the latter, you could potentially use a TCP monitor per server and assign that to the specific pool member.

 

 

Aaron

Unfortunately, they require the host header. But, you gave me enough info to proceed thank you vary much.

 

Regards,

 

Pavlos

 

 

Hi,

I don't know if this is still relevant to anyone, but I have just used a standard HTTP monitor (since ICAP is clear text as well) and the ICAP OPTIONS method:

https://tools.ietf.org/html/rfc3507section-4.10.1

send "OPTIONS icap://ICAP_SERVER ICAP/1.0\r\n\r\n"
recv "ICAP/1.0 200 OK"