Hi Abishek, Wei, I tested this feature with Ubuntu 20.04 + KVM. Some
community members tested with CentOS7 and qemu-kvm-ev and it worked.
Also, as live snapshots and live migrations, hotplug memory is a known
limitation of qemu-kvm. I cannot give you advice regarding this
replacement too, as I do not use CentOS. Best regards, Daniel Salvador
On 17/11/2021 09:07, Wei ZHOU wrote:
Hi Abishek,
I cannot give your advice on it as I did not install qemu-kvm-ev to replace
qemu-kvm before.
I suspect that the issue you faced is caused by qemu-kvm. qemu-kvm-ev
supports more advanced features than qemu-kvm.
cc @Daniel, what hypervisor did you use to test the dynamic scaling ?
-Wei
On Wed, 17 Nov 2021 at 11:42, Abishek<abckd...@gmail.com> wrote:
HI Wei,
I have not tested with qemu-kvm-ev. I am willing to try but what
effect will it have on my existing setup when I install qemu-kvm-ev in my
existing qemu-kvm. Should I have to remove qemu-kvm and install
qemu-kvm-ev? In the previous test I was able to start the machine with
Fixed Offering but the option for Scaling the VM in UI was not present
while the VM was in running state but was available when the VM was in
shutdown state only.
Thank You.
On Wed, 17 Nov 2021 at 15:23, Wei ZHOU<ustcweiz...@gmail.com> wrote:
Hi Abishek,
Have you tested with qemu-kvm-ev instead of qemu-kvm ?
-Wei
On Wed, 17 Nov 2021 at 10:00, Abishek<abckd...@gmail.com> wrote:
Hello Wei,
I am very grateful for your response. In my test environment I first
created a service offering of Custom Constrained (minCore=1,
maxCore=10,
minRam=1GB, maxRam=12GB, CPUSpeed=2000) with dynamic scaling enabled.
But
every time I tried to start the VM under this ServiceOffering I got the
above mentioned error. Please find the following agent log for that
particular VM:
https://controlc.com/4618c4d8
HOST OS : Centos 7.9
QEMU: QEMU emulator version 1.5.3 (qemu-kvm-1.5.3-175.el7_9.4),
Copyright
(c) 2003-2008 Fabrice Bellard
And I think the error seems to be with the service offering (Custom
Constrained). So, I created two Fixed services offering A(1 core and
1GB)
and B(2 Core and 2 GB) with dynamic scaling enabled. I then built a VM
based on service offering A and the VM started(finally). But I did not
find
any option to scale the VM while it's running. I was only able to scale
the
VM to shutdown state.
Thank You.
On Wed, 17 Nov 2021 at 13:11, Wei ZHOU<ustcweiz...@gmail.com> wrote:
Hi Abishek,
I guess the error is same as before:
qemu: invalid ram size: size=4194304k,slots=16,maxmem=1583660032k
What are your hypervisor/qemu version and guest OS version ?
Can you check agent.log and share the xml definition of the vm ?
-Wei
On Wed, 17 Nov 2021 at 05:18, Abishek Budhathoki <abckd...@gmail.com
wrote:
Hello Wei,
I have also tested with limited service offering where max RAM is
12GB
and
CPU is 12 core. But the result is the same. I can not start the VM.
But
if
I turn off Dynamic Scaling to Off on Advance Mode while creating
the
instance I can start the VM.
Thank You.
On Tue, 16 Nov 2021 at 20:50, Wei ZHOU<ustcweiz...@gmail.com>
wrote:
The max ram looks very huge. It would be better to double check
the
offerings.
"minRam":"(4.00 GB) 4294967296","maxRam":"(1.4749 TB)
1621666836480"
-Wei
On Tue, 16 Nov 2021 at 15:21, Abishek Budhathoki <
abckd...@gmail.com
wrote:
HI Daniel,
Extremely glad to hear that dynamic scaling is now supported in
KVM.
There is no issue of resources. I cannot start a VM with
dynamic
scaling
enabled template and service offering. But I am able to start
other
VMs.
I
have shared the logs on
https://controlc.com/204f727d
Thank You
On Tue, 16 Nov 2021 at 16:51, Abishek Budhathoki <
abckd...@gmail.com
wrote:
Hello All,
I have just upgraded my Cloudstack installation from 4.15 to
4.16
and
everything is working as expected. In the docs site(Changes
in
4.16.0.0
since 4.15) I have seen that dynamic Scaling with KVM now
works
with
Cloudstack 4.16(github #4878 Support vm dynamic scaling with
kvm).
Is
this
true? I have tried to test this but was unsuccessful. Changed
global setting enable dynamic scaling to true, created
template
with
dynamic scaling support, created service offering that
supports
dynamic
Scaling.
I only see the following error:
ERROR [c.c.a.ApiAsyncJobDispatcher]
(API-Job-Executor-12:ctx-bb24d685
job-2304) (logid:394001c9) Unexpected exception while
executing
org.apache.cloudstack.api.command.admin.vm.DeployVMCmdByAdmin
com.cloud.utils.exception.CloudRuntimeException: Unable to
start
a
VM
due
to insufficient capacity
If it's not still supported please discard this email.
Thank You.
