Forum Discussion

Nimbostratus

Nov 14, 2017

redirect IIS 500 error to another host in pool

Hi expert, I need help to configure my F5 LTM to redirect the connection to another host in the pool when one of the host/node in the pool have internal server error 500. How can i redirect ...

Nimbostratus

Nov 15, 2017

here is the output:

[root@f5:Active:Standalone] config  curl -s -v  172.16.5.76 1> /dev/null
* About to connect() to 172.16.5.76 port 80 (0)
*   Trying 172.16.5.76... connected
* Connected to 172.16.5.76 (172.16.5.76) port 80 (0)
> GET / HTTP/1.1
> User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 OpenSSL/1.0.1l zlib/1.2.3 libidn/1.18
> Host: 172.16.5.76
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: text/html
< Last-Modified: Thu, 13 Apr 2017 19:11:24 GMT
< Accept-Ranges: bytes
< ETag: "31cc9dbe89b4d21:0"
< Server: Microsoft-IIS/10.0
< X-Powered-By: ASP.NET
< Date: Wed, 15 Nov 2017 20:15:47 GMT
< Content-Length: 703
<
{ [data not shown]
* Connection 0 to host 172.16.5.76 left intact

Lee_Sutcliffe
Nacreous
Nov 15, 2017
That looks fine. Try just putting
200 OK
in the receive string. Any issues please output the tmsh/cli monitor config:
Shamsul_Alam_34
Nimbostratus
Nov 16, 2017
Still failed. No clue what going wrong here.

My monitor setting as below:

Node setting

Pool setting
Lee_Sutcliffe
Nacreous
Nov 16, 2017
Could you change your node monitor to gateway_icmp and remove https_443 from the pool so you're only using the Check_header_200-OK monitor
Shamsul_Alam_34
Nimbostratus
Nov 16, 2017
Still same after changed the setting as you requested

Monitor setting

POOL setting
Lee_Sutcliffe
Nacreous
Nov 16, 2017
Just noticed the Curl command you ran earlier is using TCP/80.

Could you create an HTTP (parent profile http) health monitor, first without a receive string. Then with the receive string.

Thanks
Shamsul_Alam_34
Nimbostratus
Nov 16, 2017
Still same. Monitor for HTTP

Pool
Lee_Sutcliffe
Nacreous
Nov 16, 2017
please remove https from the active health monitors