[ovirt-users] Cannot create VM with custom memory amount

[TranceWorldLogic .]

Thanks Ondra that link is useful,
Do you have any Idea why VDSM disable balloon concept for RHEV and use for
all non-RHEV ?

Please refer to below link.
https://www.ovirt.org/documentation/sla/memory-balloon/


*"Currently the balloon memory device is being created by default by
libvirt for non RHEV environments, and VDSM disables it by default for
RHEV."*
Is there different technique use by RHEV ? Please provide me link for it
detail.
It will help me to compare ovirt and RHEV
*.*

Thanks,
~Rohit

On Tue, Jan 10, 2017 at 10:35 PM, Ondra Machacek <omachace at redhat.com>
wrote:

> Yes, if `Guaranteed memory` and `defined memory` are equal, you are
> allowed to create a VM.
>
> The difference between those you may find here:
>
>  http://www.ovirt.org/documentation/admin-guide/virt/memory-faq/
>
> On Tue, Jan 10, 2017 at 3:00 PM, TranceWorldLogic .
> <tranceworldlogic at gmail.com> wrote:
> > Thanks for your help Ondra,
> >
> > Now I able to allocate 300MB memory for VM.
> >
> > But I observe some different behaviour than mention in your mail, let me
> > explain.
> >
> > Let consider, parameter memory value is M.
> > And parameter for guaranteed memory value is G
> >
> > Case 1> M < G => Fail to create VM got same error.
> > Case 2> M = G => VM created successfully.
> > Case 3> M > G => VM created successfully.
> >
> > On GUI, in general tab it show guaranteed memory as "Physical Memory
> > Guaranteed"  and memory parameter is shown as "Defined Memory".
> > Meaning of those two parameter look to me,
> > 1> guaranteed value mean like as minimum requirement to run VM and
> > 2> memory value is like if available would be better.
> >
> > Would you please provide input on same ?
> >
> >
> > Thanks,
> > ~Rohit
> >
> > On Tue, Jan 10, 2017 at 6:50 PM, Ondra Machacek <omachace at redhat.com>
> wrote:
> >>
> >> You must make sure you have `memory` attribute higher then
> >> `memory_guaranteed`
> >>
> >> For example this will work:
> >>
> >>  memory=2*2**30,
> >>  memory_policy=types.MemoryPolicy(
> >>      guaranteed=1*2**30,
> >>  ),
> >>
> >> and this won't work:
> >>
> >>   memory=1*2**30,
> >>   memory_policy=types.MemoryPolicy(
> >>       guaranteed=2*2**30,
> >>   ),
> >>
> >> Because guaranteed memory must be higher.
> >>
> >> On Tue, Jan 10, 2017 at 2:05 PM, TranceWorldLogic .
> >> <tranceworldlogic at gmail.com> wrote:
> >> > Hi,
> >> >
> >> > I was also getting same issue.
> >> > And found that it work only for 1024 MB memory size. It may be due to
> >> > "Blank" template value, not sure.
> >> >
> >> > Please someone help us to figure out this problem.
> >> >
> >> > Thanks,
> >> > ~Rohit
> >> >
> >> > On Mon, Jan 9, 2017 at 10:36 PM, Logan Kuhn <
> support at jac-properties.com>
> >> > wrote:
> >> >>
> >> >> I'm working on a program that should take a set of variables for the
> >> >> name,
> >> >> ram and disk space as well as how many disks (IE, 3 at 10, 15 and
> >> >> 20GB).
> >> >> Most of that works, but if I try and specify an integer value for
> >> >> memory it
> >> >> will seemingly always fail.  I'm using Python 3, code and error are
> >> >> below.
> >> >>
> >> >> def create_vm(name, ram, cpu=None):
> >> >>         garbled_passwd = 'd3lrazNwa2wjUnI='
> >> >>
> >> >>         logging.basicConfig(level=logging.DEBUG,
> >> >> filename=os.path.join(baseDir, 'list_vms.log'))
> >> >>
> >> >>         # This example will connect to the server and create a new
> >> >> virtual
> >> >> machine:
> >> >>
> >> >>         # Create the connection to the server:
> >> >>         connection = sdk.Connection(
> >> >>             url='https://ovirt.example.com/ovirt-engine/api',
> >> >>             username='admin at internal',
> >> >>             password=base64.b64decode(garbled_passwd).decode('utf-8'
> ),
> >> >>             ca_file='/etc/pki/tls/certs/examplecert.pem',
> >> >>             debug=True,
> >> >>             log=logging.getLogger(),
> >> >>         )
> >> >>
> >> >>         # Get the reference to the "vms" service:
> >> >>         vms_service = connection.system_service().vms_service()
> >> >>
> >> >>         # Use the "add" method to create a new virtual machine:
> >> >>         cpu = types.CpuTopology(cores=2, sockets=1)
> >> >>
> >> >>         vms_service.add(
> >> >>             types.Vm(
> >> >>                 name=name,
> >> >>                 memory=400,
> >> >>                 cpu=types.Cpu(topology=cpu),
> >> >>                 cluster=types.Cluster(
> >> >>                     name='Default',
> >> >>                 ),
> >> >>                 template=types.Template(
> >> >>                     name='Blank',
> >> >>                 ),
> >> >>             ),
> >> >>         )
> >> >>
> >> >>         # Close the connection to the server:
> >> >>         connection.close()
> >> >>
> >> >> ovirtsdk4.Error: Fault reason is "Operation Failed". Fault detail is
> >> >> "[Cannot add VM. Physical Memory Guaranteed cannot exceed Memory
> >> >> Size.]".
> >> >> HTTP response code is 400.
> >> >>
> >> >> The Template is unmodified from installation time.  I know the other
> >> >> settings are right because if I comment out the memory line then it
> >> >> creates
> >> >> a VM with the memory value from the "Blank" template.
> >> >>
> >> >> Regards,
> >> >> Logan
> >> >>
> >> >> _______________________________________________
> >> >> Users mailing list
> >> >> Users at ovirt.org
> >> >> http://lists.ovirt.org/mailman/listinfo/users
> >> >>
> >> >
> >> >
> >> > _______________________________________________
> >> > Users mailing list
> >> > Users at ovirt.org
> >> > http://lists.ovirt.org/mailman/listinfo/users
> >> >
> >
> >
>
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