[Bug 1624997] Re: live-migration fails because of " Host key verification failed"

[James Page]

I have a feeling this is related to bug 1628216 but we'll need to
confirm a few details.

For those on the bug impacted, please can you describe the network
configuration in your infrastructure;  if 'unit-get private-address'
does not match the DNS response from nslookup hostname, then we see this
type of mismatch and broken live migration due to mismatching SSH keys.

FWIW the solution in #5 might work, but it does disable any level of
encryption and security on your compute nodes, allowing anyone with
network access to tinkle with the instances running on your hypervisors.

Marking 'Incomplete' for now - if we can confirm the DNS/private-address
mismatch problem then we can mark as a dupe of bug 1628216.

** Changed in: nova-compute (Juju Charms Collection)
       Status: New => Incomplete

** Changed in: nova-compute (Juju Charms Collection)
   Importance: Undecided => Medium

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Title:
  live-migration fails because of " Host key verification failed"

Status in Landscape Server:
  New
Status in nova package in Ubuntu:
  Invalid
Status in nova-compute package in Juju Charms Collection:
  Incomplete

Bug description:
  OpenStack Mitaka deployed through Autopilot by following
  http://www.ubuntu.com/download/cloud

  While migrate an instance between two nova-compute nodes, below error
  will be captured log:

  2016-09-19 05:50:37.767 5987 ERROR nova.virt.libvirt.driver [req-1a482106-cd47-484a-bf1e-5e1c96dc2009 3473024639d04768a780d4e3b0d92438 72a68c40f9aa4a8b87100824ea708c2a - - -] [instance: 2f145635-bb76-4554-8385-861eb4fc849b] Live Migration failure: operation failed: Failed to connect to remote libvirt URI qemu+ssh://CA29/system: Cannot recv data: Host key verification failed.: Connection reset by peer
  2016-09-19 05:50:37.768 5987 DEBUG nova.virt.libvirt.driver [req-1a482106-cd47-484a-bf1e-5e1c96dc2009 3473024639d04768a780d4e3b0d92438 72a68c40f9aa4a8b87100824ea708c2a - - -] [instance: 2f145635-bb76-4554-8385-861eb4fc849b] Migration operation thread notification thread_finished /usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py:6530
  2016-09-19 05:50:37.777 5987 DEBUG nova.virt.libvirt.driver [req-1a482106-cd47-484a-bf1e-5e1c96dc2009 3473024639d04768a780d4e3b0d92438 72a68c40f9aa4a8b87100824ea708c2a - - -] [instance: 2f145635-bb76-4554-8385-861eb4fc849b] VM running on src, migration failed _live_migration_monitor /usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py:6319
  2016-09-19 05:50:37.778 5987 DEBUG nova.virt.libvirt.driver [req-1a482106-cd47-484a-bf1e-5e1c96dc2009 3473024639d04768a780d4e3b0d92438 72a68c40f9aa4a8b87100824ea708c2a - - -] [instance: 2f145635-bb76-4554-8385-861eb4fc849b] Fixed incorrect job type to be 4 _live_migration_monitor /usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py:6339
  2016-09-19 05:50:37.779 5987 ERROR nova.virt.libvirt.driver [req-1a482106-cd47-484a-bf1e-5e1c96dc2009 3473024639d04768a780d4e3b0d92438 72a68c40f9aa4a8b87100824ea708c2a - - -] [instance: 2f145635-bb76-4554-8385-861eb4fc849b] Migration operation has aborted
  2016-09-19 05:51:07.633 5987 DEBUG nova.virt.libvirt.driver [req-1a482106-cd47-484a-bf1e-5e1c96dc2009 3473024639d04768a780d4e3b0d92438 72a68c40f9aa4a8b87100824ea708c2a - - -] [instance: 2f145635-bb76-4554-8385-861eb4fc849b] Live migration monitoring is all done _live_migration /usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py:6550

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