Re: [Qemu-devel] Add an IPMI device to qemu

[Noel Burton-Krahn <noel@pistoncloud.com>]

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Thanks, Corey.

How does the lan_config_program in lan.conf work?  I couldn't find an
example in the OpenIPMI-2.0.21 tarball.  Our central controller expects
each node's ipmi module to dhcp for an address.  I'm trying to decide if I
need to run dhcpc on the interface that ipmi_sim runs on.  Can I just bind
ipmi_sim to an interface and let it dhcp for its address?  If not, how does
it work with lan_config_program?


FYI, In our setup, we have two networks for ipmi and data.  One control
node is connected to both networks and provides dhcp

controller       node1      node2 ...
IPMI  eth0 ----- ipmi0 ---- ipmi0
DATA  eth1 ----- eth0 ----- eth0

I'm using veth pairs with one end in a bridge for the ipmi interfaces and
tap devices for qemu simulating the nodes.

--
Noel




On Thu, Apr 23, 2015 at 2:42 PM, Corey Minyard <minyard@acm.org> wrote:

> On 04/22/2015 07:25 PM, Noel Burton-Krahn wrote:
> > OK, I've build qemu and openipmi.  I'm simulating a system where a
> > central control node boots from USB, then uses IPMI to boot a cluster
> > of slave nodes and provisions them by tftpboot.  If I understand
> > correctly, I'll be running one ipmi_sim per slave node, and my control
> > node will tell that to boot a qemu instance for each slave.  Sounds
> > good so far?
>
> Yes, that is correct.
>
> >
> > The sample lan.conf has two sections started by set_working_mc 0x20
> > and set_working_mc 0x30.  Is that for configuring multiple ipmi
> > simulators in a single config file?
> >
>
> That is just for testing, really.  IPMI supports configurations with
> multiple management controllers, say if you put a management controller
> in a power supply that just managed that device.
>
> However, you should be able to manage multiple VMs from a single IPMI
> simulator.  Create an MC for each VM and set it up, and send the chassis
> management commands to the individual MC.  You can use the "-t" option
> of ipmitool to set the particular MC you are addressing.
>
> -corey
>
> -corey
>

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