Live scaling fails with “unhandled exception” when cpu.corespersocket is set (need support for consistent CPU sockets)
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Descrição
### problem
I’m trying to enforce a consistent CPU socket configuration across VMs by using the global setting cpu.corespersocket.
However, when this setting is enabled, live CPU scaling fails with the message:
`unhandled exception`
If I remove the setting cpu.corespersocket, the same VM live-scales successfully, so the issue is directly related to that parameter.
For some environments (especially those with CPU-based licensing tied to sockets), it is important to make sure that the socket count is always fixed (e.g., always 2 sockets regardless of the number of cores assigned).
At the moment, CloudStack does not seem to reliably honor or handle this setting during live scaling operations.
### versions
Apache CloudStack: 4.22.0
Hypervisor: VMware vCenter + ESXi
Infrastructure: Standard VMware cluster, shared storage
VM type: User instance with dynamic scaling enabled
### The steps to reproduce the bug
1. Set the setting on any VM/instance:
> `cpu.corespersocket = 2`
2. Turn on the VM/instance
3. Scale VM/instance
4. `Unhandled exception` error pops up
### What to do about it?
- Please confirm whether the cpu.corespersocket setting is fully supported for VMware live scaling.
- If this is a bug, kindly update VM reconfigure logic to correctly compute:
`cores = total_vcpu / cpu.corespersocket`
`sockets = cpu.corespersocket`
- If this is a limitation, please advise if CloudStack can support a feature to force a fixed socket count (e.g., always 2 sockets) regardless of vCPU changes.
- This is important for environments that rely on socket-based licensing.
Guia de contribuição
Direção de pesquisa
Nenhum arquivo-fonte ou teste foi indicado. Comece reproduzindo o escalonamento de CPU ao vivo no VMware com cpu.corespersocket=2 e, em seguida, rastreie o ponto de entrada do escalonamento ao vivo do VMware e seu tratamento da reconfiguração da VM. O trabalho estará concluído quando o escalonamento não gerar mais uma exceção não tratada e a configuração de socket/core for preservada ou sua limitação for claramente documentada.
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Avaliação
- Domínio
- cloud, infrastructure
- Tipo de issue
- Bug
- Dificuldade
- 4/5
- Tempo estimado
- 3-5 dias
- Status de atividade
- Pouca atividade
- Clareza
- Razoavelmente clara
- Facilidade para iniciantes
- 45/100