We have not used the confignetwork postscript in the past, but I'll
review it to see if it can address our needs for our next compute
image (probably some time after CentOS 7.5 is out).
There may be a few complications in our environment which I'll need to
address. Over time we have acquired a variety of compute nodes and
have added 10G interfaces to some of the 1G connected compute nodes.
Interface names and corresponding information in our externally
managed DNS may not match xCAT expectations.
I'll try to work through things and ask if I have any specific issues.
Thanks for the information.
Stuart
On Wed, 30 May 2018 at 03:33 -0000, Bin XA Xu wrote:
> Hi Stuart, Is it possible for you to configure the IP on
> compute nodes as static? you can do it by adding `confignetwork -s`
> into postscripts. For details, please check
> https://xcat-docs.readthedocs.io/en/stable/guides/admin-guides/manage_clusters/common/deployment/network/cfg_network_ethernet_nic.html?highlight=static%20IP
>
> And it is recommended not to run `NetworkManager` on compute
> nodes unless you have special needs, for rhel7, xCAT will disable it
> by default.
> Bin Xu
> HPC Software Development
> Software Defined Infrastructure, IBM Systems
> Phone: 86-010-82454067
> E-mail: bx...@cn.ibm.com
>
>
> ----- Original message -----
> From: Stuart Barkley <stua...@4gh.net>
> To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
> Cc:
> Subject: Re: [xcat-user] CentOS 7, diskless compute and NetworkManager
> Date: Wed, May 30, 2018 10:56 AM
> 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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-- Daniel Boone------------------------------------------------------------------------------
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