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

[Ondra Machacek]

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
>> >
>
>