http2 monitor using eav

[neeeewbie]

Hi guys

I need your help!

we check pool member using http2 monitor using eav but I can't find reverse option on eav

how to enable reverse option on eav ??

I referenced https://devcentral.f5.com/s/articles/Using-a-BIG-IP-EAV-external-monitor-to-monitor-HTTP-2-h2c-serve...

thanks

[jaikumar_f5 · Accepted solution]

Actually in my opinion, EAV (external) monitors never had the reverse option. Because that's totally breaks the logic of std ouput which marks the node up. Reverse option could be found on http / https monitors, i've seen it. But not on the external monitor. The script run, writes to standard output, if thats true, pool member is marked up. There' no reverse option here.

Feel free to correct otherwise.

[neeeewbie]

thank you for sharing your knowledge

do you know other way for using reverse option?

[alven_kim]

There is a concept of EAV in the link below.

EAV only determines the status-up/down of stdout.

If the string is returned to stdout, it will unconditionally state-up.

If there's no stdout, state-down.

Unfortunately, I also failed to use the receive-enable-string/disable-string function using the monitor of h2c.

<EAV Concept> - https://support.f5.com/csp/article/K1561

Important: Any node that fails to meet the EAV criteria should not be sent to stdout. If you create an EAV script that displays a node as up for a positive response, but also displays down for a negative response, the bigd process will interpret both responses as up.