I had a similar problem with the USB-based IPMI network interfaces. I
blacklisted the driver. In the image for your node, add the following file:
/etc/modprobe.d/usbeth_blacklist.conf
With the content (verify that cdc_ether is the correct driver first!)
blacklist cdc_ether
You can probably also edit /etc/sysconfig/network-scripts/ifcfg-usb0 and
set ONBOOT=no
_______________________________________________________________________
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On Tue, May 29, 2018 at 7:43 PM, Stuart Barkley <stua...@4gh.net> wrote:
> I haven't seen a response to the question below.
>
> Should I expect to be running NetworkManager on diskless compute nodes
> with CentOS 7 and xCAT 2.13.X?
>
> When deploying the updated compute image on certain nodes, I'm now
> finding NetworkManager bringing up unwanted interfaces using dhcp.
> Specifically, on our IBM compute nodes DHCP is bringing up the usb
> based network interface to the IPMI device confusing OpenMPI.
>
> Thanks for any insights,
> Stuart
>
> [Also, I've been having problems sending email to this list for the
> last few months. Perhaps it is time to migrate the mailing list off
> of sourceforge.]
>
> On Mon, 5 Mar 2018 at 21:20 -0000, Stuart Barkley wrote:
>
> > Date: Mon, 5 Mar 2018 21:20:25
> > From: Stuart Barkley <stua...@4gh.net>
> > Reply-To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
> > To: xcat-user@lists.sourceforge.net
> > Subject: [xcat-user] CentOS 7, diskless compute and NetworkManager
> >
> > What is the current recommended configuration regarding NetworkManager
> > for diskless compute nodes (CentOS 7.3/7.4)?
> >
> > We are upgrading xCAT with a large jump (from 2.8 to 2.13.8) and
> > running into issues with our compute images losing IP address after 12
> > hours (dhclient is not running). The Release Notes for 2.13 show
> > Issue 1972 as being resolved, but this sounds like the problem we are
> > seeing.
> >
> > <https://github.com/xcat2/xcat-core/issues/1972> has a long set of
> > comments and some of the referenced patches seem to be applied.
> > <https://github.com/xcat2/xcat-core/issues/1972#issuecomment-254120700>
> > references a fix <https://github.com/xcat2/xcat-core/pull/1977/files>
> > which adds NetworkManager to the compute image. This change seems to
> > address our problem, but does not seem to have made it into mainline
> > xCAT.
> >
> > In general, I would prefer to not have NetworkManager running, but
> > that is mostly a historical bias. NetworkManager does bring in a few
> > unneeded modules (ppp and wireless support in particular), but I can
> > live with it if necessary.
> >
> > We are not explicitly running hardeths, configeth or anything similar.
> >
> > Is NetworkManager required? Or should I remove it and search for some
> > other cause of the problem?
> >
> > Thanks for any suggestions,
> > Stuart Barkley
> > --
> > I've never been lost; I was once bewildered for three days, but never
> lost!
> > -- Daniel Boone
>
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