Old bug. I'm going to mark this as Invalid for neutron since there is a
flag to control the behavior, forcing the dhcp-agent to provide a route
if the network is isolated.
In the dhcp-agent.ini file you should un-comment and set this value to
True:
# The DHCP server can assist with providing metadata support on isolated
# networks. Setting this value to True will cause the DHCP server to append
# specific host routes to the DHCP request. The metadata service will only be
# activated when the subnet does not contain any router port. The guest
# instance must be configured to request host routes via DHCP (Option 121).
# This option doesn't have any effect when force_metadata is set to True.
# (boolean value)
enable_isolated_metadata = true
** Changed in: neutron
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1618013
Title:
metadata route is absent and metadata server unavailable for instance
with network w/o gateway
Status in neutron:
Invalid
Status in OpenStack Compute (nova):
Incomplete
Bug description:
ubuntu 14.04
latest devstack (28.08.2016)
enabled services: nova, glance, cinder, keystone, horizon, neutron,
neutron-vpnaas, ec2-api
steps to reproduce:
0) source demo credentials
1) create network
2) create subnet without gateway
3) boot instance from cirros image
4) run vnc console
5) run 'route -n':
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.10.0.0 10.10.2.1 255.255.0.0 UG 0 0 0 eth0
10.10.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
6) run 'curl http://169.254.169.254/latest/'
curl: (7) Failed to connect to 169.254.169.254: Network is unreachable
if user runs instance with predefined network that all works well:
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.10.1.1 0.0.0.0 UG 0 0 0 eth0
10.10.0.0 10.10.1.1 255.255.0.0 UG 0 0 0 eth0
10.10.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.169.254 10.10.1.1 255.255.255.255 UGH 0 0 0 eth0
according to gating jobs it was broken between "Aug 25 2:05 PM" (last check
pipeline - https://review.openstack.org/#/c/360230/)
and "Aug 26 1:05 AM" (patch 4 first check pipeline -
https://review.openstack.org/#/c/357766/)
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