F5 - Sharepoint App Pool down does not load balancing

Hello

 

It is a TCP-Probe on the Port. The strange thing the load balancer stays green. The testcase is:

 

Stopp AppPool on Server 1 / AppPool on Server 2 is running -> F5 switches and Website is displayed

 

Stopp AppPool on Server 2 / AppPool on Server 1 is running -> F5 does not switch and Website is Not displayed

 

Actually the behaviour should be the same on both testcases.

 

Greetings

 

Heinrich

 

load balancing behaviors will be based on your health monitor, in a very basic configuration the f5 will load balance a connection to pool member as long as the pool member has a green status/available, Do you mind posting your configuration, not 100% but I would assume the default settings in the tcp monitor will check the port if its up and running. You will need to more then a simple port monitor to check your application status on the web server.

 

Best to ask your web team to create a test page for you, that contains a simple sting such as SERVER_UP, then create a custom http monitor to request the page with a recv string. Below is an example

 

ltm monitor http custom-monitorhttp { adaptive disabled defaults-from http destination : interval 5 ip-dscp 0 recv SERVER_UP recv-disable none send "GET /HealthCheck.html\r\n" time-until-up 0 timeout 16

 

[root@bipipbrplab01:Active:Disconnected] config curl --get http://10.1.2.12/HealthCheck.html

 

F5 Test Page

 

SERVER_UP

 

The web server software is running.

 

[root@bipipb01:Active:Disconnected] config

 

Hello Hier the output

 

ltm virtual CM-CH-PRD-APPNAME-STAGE-443 {

 

description CM-CH-PRD-APPNAME-STAGE-443

 

destination 10.123.123.123%2:https

 

ip-protocol tcp

 

mask 255.255.255.255

 

partition T3-ZZ02-F5S01

 

persist {

 

source_addr_3m {

 

default yes

 

}

 

}

 

pool SF01-CH-PRD-APPNAME-STAGE-443

 

profiles {

 

/Common/tcp { }

 

}

 

source 0.0.0.0/0

 

source-address-translation {

 

pool vlan_1265_8

 

type snat

 

}

 

translate-address enabled

 

translate-port enabled

 

vlans {

 

T3-CH02-VL1220

 

T3-CH02-VL1221

 

T3-CH02-VL1222

 

T3-CH02-VL1226

 

T3-CH02-VL1227

 

T3-CH02-VL1263

 

T3-CH02-VL1264

 

T3-CH02-VL1265

 

T3-CH02-VL1268

 

T3-CH02-VL74

 

ltm pool SF01-CH-PRD-APPNAME-STAGE-443 {

 

members {

 

SERVER1:any {

 

address 10.123.83.125

 

session monitor-enabled

 

state up

 

}

 

SERVER2:any {

 

address 10.123.83.126

 

session monitor-enabled

 

state up

 

}

 

}

 

monitor PROBE-CH-ZZZ-APPNAME-STAGE-8082

 

partition T3-ZZ02-F5S01

 

Thanks the last thing we need to look at is the monitor configurations

 

"tmsh ltm monitor "parent monitor" PROBE-CH-ZZZ-APPNAME-STAGE-8082

 

I intended that

 

"tmsh ltm monitor "parent monitor" PROBE-CH-ZZZ-APPNAME-STAGE-8082

 

is the command.

 

But the output is: Syntax error

 

What is the exact command.

 

Thank you for the answer

 

Hi

 

try the below, from the ltm module in tmsh(tmsh ltm) change your directory to ensure you are in the partition T3-ZZ02-F5S01 "cd /T3-ZZ02-F5S01"

 

"list monitor all-properties" you will then see all your custom configured monitors find the monitor PROBE-CH-ZZZ-APPNAME-STAGE-8082 and post the configuration

 

Hello KevinA Thank you I will try.

 

Do you have an example for a probe for SharePoint on Prem 2016.

 

That could be also very helpful.

 

Heinrichxx