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Re: Something like a KVM switch for multiple Raspberry Pis

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"Rob" <nomail@example.com> wrote in message 
news:slrnmvq1a2.lmg.nomail@xs9.xs4all.nl...
> James Harris <james.harris.1@gmail.com> wrote:
>>
>> "Rob" <nomail@example.com> wrote in message
>> news:slrnmvp0th.87d.nomail@xs9.xs4all.nl...
>>> James Harris <james.harris.1@gmail.com> wrote:
>>>> "rickman" <gnuarm@gmail.com> wrote in message
>>>> news:mthne9$pjl$1@dont-email.me...
>>>>> On 9/18/2015 2:42 PM, Martin Gregorie wrote:
>>>>
>>>> ...
>>>>
>>>>>> Put that way, it sounds very like an RPi with USB keyboard+mouse 
>>>>>> +
>>>>>> HDMI
>>>>>> monitor plus an Ethernet hub/switch connecting all the RPIs
>>>>>> together.
>>>>>>
>>>>>> Use the one with keyboard etc to login to the other headless 
>>>>>> RPis.
>>>>>
>>>>> Exactly.  Unless there is some advantage to having a device on the
>>>>> pi
>>>>> that actually plugs into the HDMI/USB connectors to emulate the
>>>>> physical devices.
>>>>
>>>> Sure. Remote desktop or VNC etc can only work on a running OS and,
>>>> what
>>>> is more, a running OS which has suitable apps. For bare-metal
>>>> programming, OS development and to see what's happening in the boot
>>>> process you need access to the real inputs and outputs.
>>>
>>> Then throw out the Raspberries, get a decent Intel/AMD based server,
>>> install VMware ESXi and you can do all the "bare metal programming",
>>> OS development etc that you like and have access to consoles over 
>>> the
>>> network.
>>
>> I have tried QEMU as a Raspberry Pi emulator but, IIRC, its emulation
>> was not close enough.
>>
>> I just looked for VMWare ESXi and found, in common with other VMWare
>> products that it is hard to understand. I am not sure what the
>> difference is between Vsphere and ESXi, for example. I know that 
>> Vsphere
>> is a hypervisor but the video describing it spoke of installing ESXi.
>> Two names for the same thing?
>>
>> ESXi seems to be a type 1 hypervisor. Doesn't that mean that it has 
>> to
>> run on a Raspberry Pi in order to emulate a Raspberry Pi?
>>
>> If I installed ESXi (or some other VMWare product) on an Intel/AMD
>> machine how are you suggesting I get that to emulate a Raspberry Pi
>> accurately?
>
> Just forget about the Raspberry thing.

Why? The whole point of some of what I am looking at is to run on the 
specific Raspberry Pi hardware. I think you are mixing my requirements 
up with someone else's.

> I presume when you want to teach about programming

I don't want to teach about programming... Perhaps you are thinking of 
the post by "DisneyWizard"?

> it does not matter
> if the platform is Raspberry or PC.  What ESXi gives you is a large
> number of virtual Intel (PC) machines on a single box, and the way
> to monitor it all via the network.  You can see the console and input
> keyboard/mouse input over the network.  And the virtual machines of
> course also have network so you can do SSH or VNC just as well.

I don't know about "DisneyWizard" but I currently use Oracle VirtualBox 
and DosBox for such testing on a PC. ESXi sounds like another option, 
though.

> This suggestion was just meant as a solution to the original problem
> of setting up some system where multiple users in a classroom should
> be able to work on a computer with someone monitoring their activity,

OK but that's nothing to do with me.

> not a solution to the problem that was described in the first post
> where already the assumption was made that it would be done on RPi
> and some hardware was required to switch their HDMI/USB connections
> onto a monitoring station.

Different requirement.

James

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Thread

Something like a KVM switch for multiple Raspberry Pis "James Harris" <james.harris.1@gmail.com> - 2015-09-06 18:00 +0100
  Re: Something like a KVM switch for multiple Raspberry Pis Dave Higton <dave@davehigton.me.uk> - 2015-09-06 21:46 +0100
    Re: Something like a KVM switch for multiple Raspberry Pis "James Harris" <james.harris.1@gmail.com> - 2015-09-07 17:42 +0100
  Re: Something like a KVM switch for multiple Raspberry Pis ray carter <ray@zianet.com> - 2015-09-07 00:36 +0000
  Re: Something like a KVM switch for multiple Raspberry Pis davehigton14@gmail.com - 2015-09-07 03:54 -0700
  Re: Something like a KVM switch for multiple Raspberry Pis Gordon Levi <gordon@address.invalid> - 2015-09-08 00:54 +1000
  Re: Something like a KVM switch for multiple Raspberry Pis Andrew Smallshaw <andrews@sdf.lonestar.org> - 2015-09-13 12:45 +0000
    Re: Something like a KVM switch for multiple Raspberry Pis Alan Adams <alan@adamshome.org.uk> - 2015-09-13 19:22 +0100
    Re: Something like a KVM switch for multiple Raspberry Pis Jonathan Lane <tidux@faeroes.freeshell.org> - 2015-09-27 15:28 +0000
  Re: Something like a KVM switch for multiple Raspberry Pis Martin Gregorie <martin@address-in-sig.invalid> - 2015-09-13 13:48 +0000
    Re: Something like a KVM switch for multiple Raspberry Pis David James <david@tcs01.demon.co.uk> - 2015-09-13 14:22 +0000
      Re: Something like a KVM switch for multiple Raspberry Pis Martin Gregorie <martin@address-in-sig.invalid> - 2015-09-13 17:42 +0000
        Re: Something like a KVM switch for multiple Raspberry Pis David James <david@tcs01.demon.co.uk> - 2015-09-16 00:01 +0000
  Re: Something like a KVM switch for multiple Raspberry Pis DisneyWizard the Fantasmic! <wiz@FANTASMIC!disneywizard.com> - 2015-09-17 08:38 -0700
    Re: Something like a KVM switch for multiple Raspberry Pis rickman <gnuarm@gmail.com> - 2015-09-18 08:40 -0400
      Re: Something like a KVM switch for multiple Raspberry Pis Rob Morley <nospam@ntlworld.com> - 2015-09-18 14:26 +0100
      Re: Something like a KVM switch for multiple Raspberry Pis Martin Gregorie <martin@address-in-sig.invalid> - 2015-09-18 18:42 +0000
        Re: Something like a KVM switch for multiple Raspberry Pis rickman <gnuarm@gmail.com> - 2015-09-18 15:09 -0400
          Re: Something like a KVM switch for multiple Raspberry Pis "James Harris" <james.harris.1@gmail.com> - 2015-09-18 20:17 +0100
            Re: Something like a KVM switch for multiple Raspberry Pis Rob <nomail@example.com> - 2015-09-18 21:35 +0000
              Re: Something like a KVM switch for multiple Raspberry Pis "James Harris" <james.harris.1@gmail.com> - 2015-09-18 23:19 +0100
                Re: Something like a KVM switch for multiple Raspberry Pis Rob <nomail@example.com> - 2015-09-19 06:48 +0000
                Re: Something like a KVM switch for multiple Raspberry Pis "James Harris" <james.harris.1@gmail.com> - 2015-09-19 11:15 +0100
                Re: Something like a KVM switch for multiple Raspberry Pis mm0fmf <none@mailinator.com> - 2015-09-19 08:13 +0100
                Re: Something like a KVM switch for multiple Raspberry Pis "James Harris" <james.harris.1@gmail.com> - 2015-09-19 11:19 +0100
            Re: Something like a KVM switch for multiple Raspberry Pis rickman <gnuarm@gmail.com> - 2015-09-19 11:31 -0400
            Re: Something like a KVM switch for multiple Raspberry Pis druck <news@druck.org.uk> - 2015-09-19 19:39 +0100
              Re: Something like a KVM switch for multiple Raspberry Pis colonel_hack@yahoo.com - 2015-09-20 22:06 -0700

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