[Bug 1510345] Re: Network is unreachable Wily ec2 c4 instance family

[Ben Howard]

Confirmed fix via KVM instances [1, 2]. Image is working its way through
automated daily publication and testing. I'll manually confirm it before
release. I booted a prior version using an "rtl8139" NIC and got ens3,
whereas with the new build yielded eth0.

ETA is likely EOD US Mountain time.

[1] http://cloud-images.ubuntu.com/wily/20151029/wily-server-cloudimg-amd64-disk1.img
[2] 
$ qemu-system-x86_64 \
   -smp 2 \
   -m 1024 \
   -machine accel=kvm \
   -drive file=wily-server-cloudimg-amd64-disk1.img,if=virtio,bus=0,cache=unsafe,unit=0,snapshot=on \
   -cdrom seed.iso} \
   -net nic,model=rtl8139 \
   -net user


** Changed in: ubuntu-on-ec2
       Status: Confirmed => In Progress

** Also affects: livecd-rootfs (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: livecd-rootfs (Ubuntu)
     Assignee: (unassigned) => Ben Howard (utlemming)

** Changed in: livecd-rootfs (Ubuntu)
       Status: New => In Progress

** Changed in: livecd-rootfs (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1510345

Title:
  Network is unreachable Wily ec2 c4 instance family

Status in Ubuntu on EC2:
  In Progress
Status in livecd-rootfs package in Ubuntu:
  In Progress

Bug description:
  I've made several attempts to launch a c4.xlarge and c4.8xlarge
  instances using Ubuntu 15.10 Wily but am unable to ping the instance
  after it has started running. The console shows that the instance
  reachability check failed.

  I am able to successfully launch c4.xlarge instances using Ubuntu
  14.04 and t2.large instances using Ubuntu 15.10.

  I've tried with both of these instance AMIs:

  ubuntu/images/hvm-ssd/ubuntu-wily-15.10-amd64-server-20151021 - ami-225ebd11
  ubuntu/images-testing/hvm-ssd/ubuntu-wily-daily-amd64-server-20151026 - ami-ea20cdd9

  Might there be a problem with the Ubuntu Kernel in 15.10 for the c4
  instances?

  Looking at the system log it seems that the network never comes up:

  [  140.699509] cloud-init[1469]: 2015-10-26 20:45:49,887 -
  url_helper.py[WARNING]: Calling 'http://169.254.169.254/2009-04-04
  /meta-data/instance-id' failed [0/120s]: request error [('Connection
  aborted.', OSError(101, 'Network is unreachable'))]

  
  Thread at AWS forums: https://forums.aws.amazon.com/thread.jspa?threadID=218656

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