Juju Charms Collection
nova-compute package

ssh-keyscan of hosts in MAAS environments is incomplete

Bug #1329251 reported by James Page
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
nova-cloud-controller (Juju Charms Collection)
Fix Released
High
Unassigned
nova-compute (Juju Charms Collection)
Fix Released
High
Unassigned

Bug Description

The nova-compute and nova-cloud-controller charms setup know_hosts files for the nova and root users to support live-migration and cold migration/resize of instances.

However, the 'private-address' key passed from nova-compute to nova-cc is an IP address, which reverse lookups to the PTR record held in MAAS DNS which is <IP>.domainname rather than <HOSTNAME>.domainname, so the actual hostname the server is configured with never gets added to the known_hosts file.

The solution is probably to add a new piece of data to the relation 'hostname' which is passed from the nova-compute charm - this way the hostname the compute servers think they are using will be scanned.

Tags: openstack

Related branches

lp:~james-page/charms/trusty/nova-cloud-controller/ssh-keyscan-hostname
Jorge Niedbalski (community): Approve
Jonathan Davies (community): Approve
OpenStack Charmers: Pending requested
Diff: 12 lines (+2/-0)
1 file modified
hooks/nova_cc_utils.py (+2/-0)
lp:~james-page/charms/trusty/nova-compute/ssh-keyscan-hostname
Jonathan Davies (community): Approve
OpenStack Charmers: Pending requested
Diff: 106 lines (+23/-11)
2 files modified
hooks/nova_compute_hooks.py (+9/-6)
unit_tests/test_nova_compute_hooks.py (+14/-5)
Revision history for this message
James Page (james-page) wrote :

The impact of this bug is that live migrations won't work

Changed in nova-cloud-controller (Juju Charms Collection):
importance: Undecided → High
Changed in nova-compute (Juju Charms Collection):
importance: Undecided → High
Jonathan Davies (jpds)
Changed in nova-cloud-controller (Juju Charms Collection):
status: New → In Progress
Changed in nova-compute (Juju Charms Collection):
status: New → In Progress
Revision history for this message
Bryan Quigley (bryanquigley) wrote :

What's stopping this from being approved? Should it be re-proposed to the Github Charms project?

James Page (james-page)
Changed in nova-compute (Juju Charms Collection):
status: In Progress → Fix Committed
Changed in nova-cloud-controller (Juju Charms Collection):
status: In Progress → Fix Committed
Edward Hope-Morley (hopem)
tags: added: openstack
Edward Hope-Morley (hopem)
Changed in nova-cloud-controller (Juju Charms Collection):
status: Fix Committed → Fix Released
Changed in nova-compute (Juju Charms Collection):
status: Fix Committed → Fix Released
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