[one-users] VM networking configuration CentOS

[Mark Kusch]

Hi list!

Problem solved... Still it FEELS like NetworkManager broke networking
in the VMs, still not confirmed.

Solution:
$ sudo su -
# modprobe nbd max_part=63
# qemu-nbd -c /dev/nbd0 /tmp/qcowimag
# install -d /mnt/centos
# mount /dev/nbd0p1 /mnt/centos
# chattr +i /mnt/centos/etc/sysconfig/network-scripts/ifcfg-eth0
# umount /mnt/centos
# ...

No, that's not nice!, but setting NM_CONTROLLED="no" didn't help.
Hope this may help someone sometime.

# kraM

On 15:24 Mon 21 Oct, Mark Kusch wrote:
> Hi list,
> 
> feels like an issue with NetworkManager in CentOS (not confirmed yet).
> ifcfg-eth0 has configured eth0 to be managed by
> `NetworkManager' (NM_CONTROLLED="yes").
> 
> Current approach is to mount and modify the qcow image
> and configure NM_CONTROLLED="no".
> 
> Currently no success.
> 
> # kraM
> 
> 
> On 14:49 Mon 21 Oct, Mark Kusch wrote:
> > Hi list,
> > 
> > I've a vnet defining IP and MAC address fields (required).
> > I've a working bridge configuration which should grant accecss to a
> > corporate DHCP server configured for exactly these IP/MAC pairs.
> > I've a CentOS qcow2 image with eth0 configuration set to DHCP.
> > 
> > When instantiating a VM it comes up with eth0 configured with IP
> > 0.192.222.10/24. MAC address is configured correctly from the vnet.
> > 
> > onevm show $ID lists expected networking configuration.
> > 
> > Any hint why the VMs come up with such an IP address? Could that be
> > OpenNebula related? Or does this feel to you like CentOS related?
> > 
> > In HOPE anyone has seen such an issue and can point me somewhere
> > which explains it to me and hopefully results in a solution ;)
> > 
> > Thanks!
> > 
> > # kraM
> > 
> > 
> > Some details:
> > $ onevnet show $ID # perfectly fine
> > USED LEASES                                                                     
> > LEASE=[ MAC="54:52:00:c0:de:0a", IP="192.168.198.10", IP6_LINK="fe80::5652:ff:fec0:de0a", USED="1", VID="19" ]
> > 
> > $onevm show $ID # perfectly fine
> > VM NICS                                                                         
> > ID NETWORK              VLAN BRIDGE       IP              MAC              
> > 0  VNet                 yes br1           192.168.198.10  54:52:00:c0:de:0a
> >                                           fe80::5652:ff:fec0:de0a
> > 
> > ifcfg-eth0 from qcow2 image:
> > DEVICE="eth0"
> > BOOTPROTO="dhcp"
> > IPV6INIT="yes"
> > MTU="1500"
> > NM_CONTROLLED="yes"
> > ONBOOT="yes"
> > TYPE="Ethernet"
> > UUID="708d6105-c3fe-44e9-8572-f6738042f930"
> > 
> > ifcfg-eth0 on VM:
> > DEVICE=eth0
> > BOOTPROTO=none
> > ONBOOT=yes
> > TYPE=Ethernet
> > NETMASK=255.255.255.0
> > IPADDR=0.192.222.10
> > GATEWAY=0.192.222.1
> > 
> > qcow2 image source:
> > - http://cloud.centos.org/i/one/c6-x86_64-20121130-1.qcow2.gz
> > - http://wiki.centos.org/Cloud/OpenNebula/QuickStart (found in this guide)
> > 
> > -- 
> > Mark Kusch
> > Silpion IT-Solutions GmbH: Systems Engineer
> > 
> > Tel.: +49 (40) 399976-51
> > Fax.: +49 (40) 399976-40
> > Mail: mark.kusch at silpion.de
> > 
> > Firmensitz: Brandshofer Deich 48, 20539 Hamburg
> > Geschäftsführer: Dipl.-Ing. (FH) Patrick Postel
> > Registergericht: Amtsgericht Hamburg HRB 78585
> > Finanzbehörde: Hamburg
> > USt.-Ident.-Nr.: DE213610768
> 
> 
> 
> > _______________________________________________
> > Users mailing list
> > Users at lists.opennebula.org
> > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
> 
> 
> -- 
> Mark Kusch
> Silpion IT-Solutions GmbH: Systems Engineer
> 
> Tel.: +49 (40) 399976-51
> Fax.: +49 (40) 399976-40
> Mail: mark.kusch at silpion.de
> 
> Firmensitz: Brandshofer Deich 48, 20539 Hamburg
> Geschäftsführer: Dipl.-Ing. (FH) Patrick Postel
> Registergericht: Amtsgericht Hamburg HRB 78585
> Finanzbehörde: Hamburg
> USt.-Ident.-Nr.: DE213610768



> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org


-- 
Mark Kusch
Silpion IT-Solutions GmbH: Systems Engineer

Tel.: +49 (40) 399976-51
Fax.: +49 (40) 399976-40
Mail: mark.kusch at silpion.de

Firmensitz: Brandshofer Deich 48, 20539 Hamburg
Geschäftsführer: Dipl.-Ing. (FH) Patrick Postel
Registergericht: Amtsgericht Hamburg HRB 78585
Finanzbehörde: Hamburg
USt.-Ident.-Nr.: DE213610768
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