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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Tags added: kernel-hyper-v

** Tags added: kernel-da-key

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https://bugs.launchpad.net/bugs/1311070

Title:
  hyper-v:IP Injection on Ubuntu 13.10 guest during Failover and Test
  Failover is corrupting the existing entries

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  [HyperV Replica :: http://technet.microsoft.com/en-us/library/jj134172.aspx]
   [Guest IP Injection :: http://blogs.technet.com/b/virtualization/archive/2012/05/29/inject-ip-address-into-the-vm-during-failover.aspx]

  hv_set_ifconfig script is corrupting the last entry inside
  /etc/network/interfaces.

  It is creating 2 entries for eth1 Leading to failure of IP Injection.

  
  1) Create Ubuntu 13.10 virtual machine.
   
  2) Attach network adapters 'Network Adapter' and 'Adapter2' on primary and configured via DHCP.
  cat /etc/network/interfaces
  # This file describes the network interfaces available on your system
  # and how to activate them. For more information, see interfaces(5).
  # The loopback network interface
  auto lo
  iface lo inet loopback
  # The primary network interface
  auto eth0
          iface eth0 inet dhcp
  auto eth1
          iface eth1 inet dhcp

  3) Enable Replication.
   
  4) Set Failover IP settings on second adapter (Adapter2)
  Set-VMNetworkAdapterFailoverConfiguration -ComputerName $computerName -VMName $vmname -IPv4Address 192.168.100.10 -IPv4SubnetMask 255.255.0.0 -IPv4PreferredDNSServer 192.168.100.101 -IPv4AlternateDNSServer 192.168.100.102 -IPv4DefaultGateway 192.168.100.1 -VMNetworkAdapterName 'Adapter2'
   
  5) Do Failover
  cat /etc/network/interfaces
  # This file describes the network interfaces available on your system
  # and how to activate them. For more information, see interfaces(5).
  # The loopback network interface
  auto lo
  iface lo inet loopback
  # The primary network interface
  auto eth0
  iface eth0 inet dhcp
  iface eth1 inet dhcp
  # The following stanza(s) added by hv_set_ifconfig
  auto eth1
  iface eth1 inet static
          address 192.168.100.10
          netmask 255.255.0.0
          gateway 192.168.100.1
          dns-nameservers 192.168.100.101 192.168.100.102
  #End of hv_set_ifconfig stanzas

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