Public bug reported: ---Problem Description--- Running the Ubuntu16 cloud image on an ubuntu 16.04 KVM host. The KVM guest is launched with 2 network interfaces connected to 2 different open vswitch bridges.
The problem is 2-fold: #1 In the guest it seems like that the interface order is not predicitve. Device names used are eth0, eth1. The device that is listed first in libvirts domain.xml is not necessarily eth0. #2 The device names are not persistet. On the next boot eth0 might be eth1 and vice verca. Contact Information = [email protected] ---uname output--- Linux Ubuntu16 4.4.0-70-generic #91-Ubuntu SMP Wed Mar 22 12:48:02 UTC 2017 s390x s390x s390x GNU/Linux Machine Type = KVM guest ---Debugger--- A debugger is not configured ---Steps to Reproduce--- guest Domain xml: <domain type='kvm' id='6'> <name>Ubuntu16VM</name> <uuid>455e6998-cec1-4010-99a6-d033ee6d3385</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu placement='static'>2</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='s390x' machine='s390-ccw-virtio-xenial'>hvm</type> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>preserve</on_crash> <devices> <emulator>/usr/bin/qemu-system-s390x</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/xenial-server-cloudimg-s390x-disk1.img'/> <backingStore/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0000'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/config.iso'/> <backingStore/> <target dev='sda' bus='scsi'/> <readonly/> <alias name='scsi0-0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='scsi' index='0' model='virtio-scsi'> <alias name='scsi0'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0003'/> </controller> <interface type='bridge'> <mac address='52:54:00:4b:78:fa'/> <source bridge='br-mgmt'/> <virtualport type='openvswitch'> <parameters interfaceid='e45852b2-d0e9-4049-a215-d0996c607f51'/> </virtualport> <target dev='vnet0'/> <model type='virtio'/> <alias name='net0'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/> </interface> <interface type='bridge'> <mac address='52:54:00:21:13:b8'/> <source bridge='br-data'/> <virtualport type='openvswitch'> <parameters interfaceid='8d383a71-3a5f-4813-949a-b5931828e12f'/> </virtualport> <target dev='vnet1'/> <model type='virtio'/> <alias name='net1'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0002'/> </interface> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='sclp' port='0'/> <alias name='console0'/> </console> <memballoon model='virtio'> <alias name='balloon0'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0004'/> </memballoon> </devices> <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-455e6998-cec1-4010-99a6-d033ee6d3385</label> <imagelabel>libvirt-455e6998-cec1-4010-99a6-d033ee6d3385</imagelabel> </seclabel> </domain> in the guest check interfaces and remember the mac address # ip a Do a reboot (or multiple) and check again if the interface-mac combination is still the same The interface order should change from time to time Userspace tool common name: udev? Userspace rpm: ? The userspace tool has the following bit modes: 64 Userspace tool obtained from project website: na ** Affects: ubuntu Importance: Undecided Status: New ** Tags: architecture-s39064 bugnameltc-153098 severity-medium targetmilestone-inin1704 ** Tags added: architecture-s39064 bugnameltc-153098 severity-medium targetmilestone-inin1704 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1679674 Title: Interface order in kvm guest image not predictable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1679674/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
