Forum Discussion

cathy_123's avatar
cathy_123
Icon for Cirrus rankCirrus
Mar 15, 2019

F5 health check logs no response or bad response

Hello Guys,   Would like to ask regarding the health check. so we have client wanted to know if our node wasnt able to reply or it did reply but a bad response. so this is the logs   sample: ...
devops
health check
health monitor
logs
LTM
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Mar 15, 2019

Hi Cathy,

if the problem persists, you may check the connectivity of the individual nodes via 

curl
.

 curl -vk https://172.217.168.227/

... combine the 

curl
command with 
rdexec $rd_id
if the the backend system is only reachable via a given route domain. 

 rdexec 1 curl -vk https://172.217.168.227/

... if you need to perform a forensic analysis for your given case. Then "Unable to connect - for whatever reason" is all you can say to your client.

You would need to enable "Monitor Logging" for the LTM monitors to get much more detailed information. But keep in mind that "Monitor Logging" have to become enabled on each LTM cluster unit seperately and must be re-enabled after each reboot of your units...

K12531: Troubleshooting health monitors

https://support.f5.com/csp/article/K12531

Cheers, Kai