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Posted to commits@cloudstack.apache.org by "kiranchavala (via GitHub)" <gi...@apache.org> on 2025/07/16 06:07:13 UTC
[I] Unable to add more than 2 volume or network to a vm deployed from a UEFI image [cloudstack]
kiranchavala opened a new issue, #11212:
URL: https://github.com/apache/cloudstack/issues/11212
### problem
Unable to add more than 2 volume or network to a vm deployed from a UEFI image
### versions
ACS 4.20.1
### The steps to reproduce the bug
1. Register a UEFI image Template
https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
2. Deploy the vm by enabling UEFI secure mode in advanced settings
<img width="596" height="268" alt="Image" src="https://github.com/user-attachments/assets/bb1449a9-74c7-4ce8-a5bf-e94d7446ab88" />
3. Once the vm is in running state , attach multiple volumes , Exception observed
Logs
```
2025-07-16 04:28:28,947 DEBUG [kvm.storage.KVMStorageProcessor] (AgentRequest-Handler-3:[]) (logid:) Attaching device: <disk device='disk' type='file'>
<driver name='qemu' type='qcow2' cache='none' />
<source file='/mnt/7b881182-e6d4-3e65-bf10-662bf0530b84/c6ef61d1-300f-442a-86e5-e31f482b64ab'/>
<target dev='vdc' bus='virtio'/>
<serial>c6ef61d1300f442a86e5</serial>
</disk>
2025-07-16 04:28:28,953 WARN [kvm.storage.KVMStorageProcessor] (AgentRequest-Handler-3:[]) (logid:) Failed to attach device to i-2-653-VM: internal error: No more available PCI slots
2025-07-16 04:28:28,953 DEBUG [kvm.storage.KVMStorageProcessor] (AgentRequest-Handler-3:[]) (logid:) Failed to attach volume [id: 394, uuid: c6ef61d1-300f-442a-86e5-e31f482b64ab, name: test2, path: c6ef61d1-300f-442a-86e5-e31f482b64ab], due to org.libvirt.LibvirtException: internal error: No more available PCI slots
```
4. Try to attach multiple networks, Exception observed
```
2025-07-16 04:36:02,019 DEBUG [kvm.resource.BridgeVifDriver] (AgentRequest-Handler-1:[]) (logid:) Successfully executed process [2045246] for command [/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh -v 2144 -p eth1 -b breth1-2144 -o add ].
2025-07-16 04:36:02,021 WARN [resource.wrapper.LibvirtPlugNicCommandWrapper] (AgentRequest-Handler-1:[]) (logid:) Plug Nic failed due to org.libvirt.LibvirtException: internal error: No more available PCI slots org.libvirt.LibvirtException: internal error: No more available PCI slots
at org.libvirt.ErrorHandler.processError(Unknown Source)
at org.libvirt.ErrorHandler.processError(Unknown Source)
```
Workaround
Change the following settings on the vm after stopping
nicAdapter to e1000 or rtl813
rootDiskController to scsi or sata
https://prnt.sc/9wSS5uX0tVYX
### What to do about it?
If the Template is a UEFI enabled , Cloudstack should check if the template is UEFI enabled or not and populated the necessary settings for root disk and nic adapter
yum install libguestfs-tools
virt-inspector --format=raw -a noble-server-cloudimg-amd64.img 2>/dev/null | grep -i '<uefi>true</uefi>'
virt-inspector -a AlmaLinux-8-GenericCloud-UEFI-latest.x86_64.qcow2 2>/dev/null | grep -i '<uefi>true</uefi>'
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Re: [I] Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image [cloudstack]
Posted by "tcp-dw (via GitHub)" <gi...@apache.org>.
tcp-dw commented on issue #11212:
URL: https://github.com/apache/cloudstack/issues/11212#issuecomment-3470580538
I have tested attachment of multiple disks on a VM in KVM environment and getting the same error on a LAB with ACS v4.20.2.
1. I did a test with UEFI VM with virtio-scsi (OS Type: Other PV virtio-scsi 64bit) with 12 DATA disks (13 disks with ROOT included). It has successfully attached 13 disks in two scsi controllers. During attaching the 13th disk DATA-13 I got the following error:
Failed to attach volume DATA-13 to VM XXXXXX; org.libvirt.LibvirtException: internal error: No more available PCI slots
2. Changed UEFI VM OS Type to AlmaLinux 8 (legagy virtio-blk driver) and added the 13th DATA disk successfully but by attaching the 14th DATA disk I got the same error as above:
Failed to attach volume DATA-14 to VM XXXXXX; org.libvirt.LibvirtException: internal error: No more available PCI slots.
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Re: [I] Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image [cloudstack]
Posted by "weizhouapache (via GitHub)" <gi...@apache.org>.
weizhouapache commented on issue #11212:
URL: https://github.com/apache/cloudstack/issues/11212#issuecomment-3355004468
this may be similar to #7490 (fixed by #9823)
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Re: [I] Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image [cloudstack]
Posted by "weizhouapache (via GitHub)" <gi...@apache.org>.
weizhouapache commented on issue #11212:
URL: https://github.com/apache/cloudstack/issues/11212#issuecomment-3473567626
> I have tested attachment of multiple disks on a VM in KVM environment and getting the same error on a LAB with ACS v4.20.2.
>
> 1. I did a test with UEFI VM with virtio-scsi (OS Type: Other PV virtio-scsi 64bit) with 12 DATA disks (13 disks with ROOT included). It has successfully attached 13 disks in two scsi controllers. During attaching the 13th disk DATA-13 I got the following error:
> Failed to attach volume DATA-13 to VM XXXXXX; org.libvirt.LibvirtException: internal error: No more available PCI slots
> 2. Changed UEFI VM OS Type to AlmaLinux 8 (legagy virtio-blk driver) and added the 13th DATA disk successfully but by attaching the 14th DATA disk I got the same error as above:
> Failed to attach volume DATA-14 to VM XXXXXX; org.libvirt.LibvirtException: internal error: No more available PCI slots.
@tcp-dw
can you share some logs in agent.log in both cases ?
can you also test the steps (1) stop the vm , (2) attach volumes (3) and start the vm ?
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Re: [I] Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image [cloudstack]
Posted by "DaanHoogland (via GitHub)" <gi...@apache.org>.
DaanHoogland commented on issue #11212:
URL: https://github.com/apache/cloudstack/issues/11212#issuecomment-3469267703
@kiranchavala can you check this again?
> this may be similar to [#7490](https://github.com/apache/cloudstack/issues/7490) (fixed by [#9823](https://github.com/apache/cloudstack/pull/9823))
that would mean 4.19.2 ?!
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Re: [I] Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image [cloudstack]
Posted by "tcp-dw (via GitHub)" <gi...@apache.org>.
tcp-dw commented on issue #11212:
URL: https://github.com/apache/cloudstack/issues/11212#issuecomment-3476481467
Sure, you will find attached **_Host-agent-and-daemon.log_** (with respective sections from host's agent.log and daemon.log during the tests reported above). Host is running qemu_v5.2.0/libvirt_v7.0.0.
Today, I did the following actions:
1. I stopped this VM changed OS-type back to "Other PV virtio-scsi" and added more disks until the maximum of allowed data disks of 32 (33 total with Root including). Error message from UI was: "Failed to attach volume. The specified VM already has the maximum number of data disks (32) attached. Please specify another VM.".
2. I started this VM from UI and curiously this VM with 33 disks has been successfully started! Then stopped it, changed OS-type to "AlmaLinux 8" and started again successfully. In both OS-types OS can see 33 block devices in total (sd* in vistio-scsi and vd* in virtio-block mode).
3. Then while it is running I removed most DATA disks and left 12 DATA disks (13 total). Stopped VM, changed back to virtio-scsi and started VM.
Then tried again adding data disks while running. Added DATA-13, DATA-14, ...,DATA-19 but during adding DATA-20 I got again the error "Failed to attach volume. Failed to attach volume DATA-20 to VM ACS-LAB-NET-8-ROUTED-VPC; org.libvirt.LibvirtException: internal error: No more available PCI slots". I have attached logs from both management server (**_ACS-CreateAndAttach-DATA-20.log_**) and host (**_Host-agent-and-daemon-2ndtest.log_**) for this last action.
I hope that it is useful.
[Host-agent-and-daemon.log](https://github.com/user-attachments/files/23285517/Host-agent-and-daemon.log)
[ACS-CreateAndAttach-DATA-20.log](https://github.com/user-attachments/files/23285519/ACS-CreateAndAttach-DATA-20.log)
[Host-agent-and-daemon-2ndtest.log](https://github.com/user-attachments/files/23285520/Host-agent-and-daemon-2ndtest.log)
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Re: [I] Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image [cloudstack]
Posted by "weizhouapache (via GitHub)" <gi...@apache.org>.
weizhouapache commented on issue #11212:
URL: https://github.com/apache/cloudstack/issues/11212#issuecomment-3469546998
> [@kiranchavala](https://github.com/kiranchavala) can you check this again?
>
> > this may be similar to [#7490](https://github.com/apache/cloudstack/issues/7490) (fixed by [#9823](https://github.com/apache/cloudstack/pull/9823))
>
> that would mean 4.19.2 ?!
similar, not the same issue 😄
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