mathwest opened a new issue, #12658:
URL: https://github.com/apache/cloudstack/issues/12658

   ### problem
   
   If you set up an network offering fr VPC and deploys said offering in an VPC 
with "InternalLBVM" as the LB service handler it appears ACS still treats it as 
a full VR instead of "Just" an Internal LB VM and runs the full set of tests on 
it. including DNS and DHCP. This causes the VM to fail health checks every 10 
minutes.
   
   We discovered this since we saw InternalLBVM was an optioon and liked the 
idea of having a seperate VM handling the app to DB traffic rather than sending 
it thrugh the already "loaded" VR for the entire VPC.
   
   ### versions
   
   The versions of ACS, hypervisors, storage, network etc..
   
   ACS Ver: 4.22.0
   Hypervisor: KVM
   Storage: Ceph
   Network: Advanced with VXLAN with multicast for guest, Public, Management 
and storage are all Vlan based.
   
   
   ### The steps to reproduce the bug
   
   1. Create a bog standard network offering for a VPC with all services 
enabled on VR and internal LB using Internal LBVM
   2. Deploy offering on an VPC
   3. Deploy the LB through the VPC - Networks - Internal LB view.
   4. Attach instances to the LB so it deploys fully.
   5. Watch the event log get filled up with an error every 10 minutes due to 
failing health checks for the LBVM
   
   <img width="1486" height="377" alt="Image" 
src="https://github.com/user-attachments/assets/e5273bb6-0a69-4fb3-b75c-bc259a9df410";
 />
   
   ### What to do about it?
   
   Disable DHCP and DNS health checks on any VR/Internal LB VM that is 
designated as only the role of an internal LB.


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