Windows Vista Forums

Adding host OS to domain when DC is a guest VM
  1. #1


    Shannon Guest

    Adding host OS to domain when DC is a guest VM

    Hi

    It appears that you need your host machines in the domain in order to get
    any use out of SCVMM '08. This is a home configuration and I've only got two
    machines to play with and don't want to add a third one as a domain
    controller so here's the scenario I'm considering and will it work?

    Install a domain controller as a VM on host machine B. Add host machine A
    to the domain. Install a domain controller as a VM on host machine A. Add
    host machine B to the domain.



    In my head it seems like it will work but I'm wondering if I'll have any
    unusual auth problems due to the fact that the host OS will boot long before
    the DC VM.

    Regards

      My System SpecsSystem Spec

  2. #2


    Bo Berglund Guest

    Re: Adding host OS to domain when DC is a guest VM

    On Fri, 6 Mar 2009 19:31:01 -0800, Shannon
    <Shannon@xxxxxx> wrote:

    >Hi
    >
    >It appears that you need your host machines in the domain in order to get
    >any use out of SCVMM '08. This is a home configuration and I've only got two
    >machines to play with and don't want to add a third one as a domain
    >controller so here's the scenario I'm considering and will it work?
    >
    >Install a domain controller as a VM on host machine B. Add host machine A
    >to the domain. Install a domain controller as a VM on host machine A. Add
    >host machine B to the domain.
    >
    >In my head it seems like it will work but I'm wondering if I'll have any
    >unusual auth problems due to the fact that the host OS will boot long before
    >the DC VM.
    >
    The host cannot attach to a domain on startup if its DC is a virtual
    machine running on itself.
    Hen-and-egg problem....
    --

    Bo Berglund (Sweden)

      My System SpecsSystem Spec

  3. #3


    Shannon Guest

    Re: Adding host OS to domain when DC is a guest VM

    Hi Bo

    That's why I'm installing a second one on the other machine. Machine A is
    up and running and it VM DC is running. Machine B is rebooted and allowed to
    attach to that DC. Once up Machine A is rebooted and allowed to attach via
    the VM on Machine B.

    I guess the real question is will the connections survive the reboots as
    long as one of the VMs is up?

    "Bo Berglund" wrote:

    > On Fri, 6 Mar 2009 19:31:01 -0800, Shannon
    > <Shannon@xxxxxx> wrote:
    >

    > >Hi
    > >
    > >It appears that you need your host machines in the domain in order to get
    > >any use out of SCVMM '08. This is a home configuration and I've only got two
    > >machines to play with and don't want to add a third one as a domain
    > >controller so here's the scenario I'm considering and will it work?
    > >
    > >Install a domain controller as a VM on host machine B. Add host machine A
    > >to the domain. Install a domain controller as a VM on host machine A. Add
    > >host machine B to the domain.
    > >
    > >In my head it seems like it will work but I'm wondering if I'll have any
    > >unusual auth problems due to the fact that the host OS will boot long before
    > >the DC VM.
    > >
    >
    > The host cannot attach to a domain on startup if its DC is a virtual
    > machine running on itself.
    > Hen-and-egg problem....
    > --
    >
    > Bo Berglund (Sweden)
    >

      My System SpecsSystem Spec

  4. #4


    Bo Berglund Guest

    Re: Adding host OS to domain when DC is a guest VM

    On Sat, 7 Mar 2009 05:43:01 -0800, Shannon
    <Shannon@xxxxxx> wrote:

    >> On Fri, 6 Mar 2009 19:31:01 -0800, Shannon
    >> <Shannon@xxxxxx> wrote:
    >>

    >> >Hi
    >> >
    >> >It appears that you need your host machines in the domain in order to get
    >> >any use out of SCVMM '08. This is a home configuration and I've only got two
    >> >machines to play with and don't want to add a third one as a domain
    >> >controller so here's the scenario I'm considering and will it work?
    >> >
    >> >Install a domain controller as a VM on host machine B. Add host machine A
    >> >to the domain. Install a domain controller as a VM on host machine A. Add
    >> >host machine B to the domain.
    >> >
    >> >In my head it seems like it will work but I'm wondering if I'll have any
    >> >unusual auth problems due to the fact that the host OS will boot long before
    >> >the DC VM.
    >> >
    >>
    >> The host cannot attach to a domain on startup if its DC is a virtual
    >> machine running on itself.
    >> Hen-and-egg problem....
    >> --
    >>

    >Hi Bo
    >
    >That's why I'm installing a second one on the other machine. Machine A is
    >up and running and it VM DC is running. Machine B is rebooted and allowed to
    >attach to that DC. Once up Machine A is rebooted and allowed to attach via
    >the VM on Machine B.
    >
    >I guess the real question is will the connections survive the reboots as
    >long as one of the VMs is up?
    >
    As with most questions regarding virtualization you can ask "what do I
    do if the virtual machine is a physical machine?".
    The answer invariably is the same for both.
    In this case, if one host is already running and its guest is also
    running and is attached to the same network as the second host then
    the first host and its guest look just like two computers on the
    network to the second host. If one of these is the DC of the domain
    the second host is a member of, then fine, the second host will be
    able to talk to its DC over the network.

    --

    Bo Berglund (Sweden)

      My System SpecsSystem Spec

  5. #5


    Kerry Brown Guest

    Re: Adding host OS to domain when DC is a guest VM

    You can actually run with only one domain controller in a child partition
    and the parent is joined to the domain. On start up the parent will use
    cached credentials. You need to set the child DC to start up before any
    other children. There are other considerations as well. See Option 4 and
    some of the comments in the following blog.

    http://blogs.msdn.com/virtual_pc_guy...r-dilemma.aspx

    It's obviously not an optimum situation and may not be something you want to
    put into production. I have done this a few times while testing and for
    demos. I've had a child DC with the parent joined to the domain and managed
    by SCVVM also running as a child. You have to play with the timing that the
    children start up with. You have to do a bit of testing to see how long it
    takes the DC to start up then set the children to delay for at least this
    long. Depending on your hardware it may take ten minutes or so to get
    everything up and running from a cold boot. Updates can be a problem as this
    may delay the startup of the DC. I've found it best to update in this
    order - child DC first, parent, then the rest of the children.

    --
    Kerry Brown
    MS-MVP - Windows Desktop Experience: Systems Administration
    http://www.vistahelp.ca/phpBB2/




    "Shannon" <Shannon@xxxxxx> wrote in message
    news:1585A919-E005-423A-9EC8-A21B52DACD27@xxxxxx

    > Hi
    >
    > It appears that you need your host machines in the domain in order to get
    > any use out of SCVMM '08. This is a home configuration and I've only got
    > two
    > machines to play with and don't want to add a third one as a domain
    > controller so here's the scenario I'm considering and will it work?
    >
    > Install a domain controller as a VM on host machine B. Add host machine A
    > to the domain. Install a domain controller as a VM on host machine A.
    > Add
    > host machine B to the domain.
    >
    > In my head it seems like it will work but I'm wondering if I'll have any
    > unusual auth problems due to the fact that the host OS will boot long
    > before
    > the DC VM.
    >
    > Regards

      My System SpecsSystem Spec

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