OpenStack-Tempest No nw_info cache associated with instance
When using Tempest to test an OpenStack-Cloud, it is easy to run into this error
tempest.lib.exceptions.BadRequest: Bad request Details: {u'message': u'No nw_info cache associated with instance', u'code': 400}
In fact, networks are not configured proper. Tempest needs a full configured network, connected to the external network, to get some things working. This must be available to all tempest projects/tenante, hence it is enough to create it for each, but use the same name. I created a heat stack for this, and called this network needed-for-tempest. .. code:
heat_template_version: 2014-10-16 description: > Setting up a private Network with an snat-router parameters: public_net_id: type: string description: ID of public network for which floating IP addresses will be allocated resources: ### Creates a Neutron network and subnet network: type: OS::Neutron::Net properties: name: needed-for-tempest subnet: type: OS::Neutron::Subnet properties: name: needed-for-tempest1 dns_nameservers: - 37.123.105.116 - 37.123.105.117 network_id: { get_resource: network } ip_version: 4 gateway_ip: 10.0.0.1 cidr: 10.0.0.0/24 allocation_pools: - { start: 10.0.0.230, end: 10.0.0.240 } router: type: OS::Neutron::Router properties: external_gateway_info: { network: { get_param: public_net_id } } router_subnet_connect: type: OS::Neutron::RouterInterface depends_on: [ subnet, router ] properties: router_id: { get_resource: router } subnet: { get_resource: subnet }
Of cource, tempest.conf has to be edited as well:
[network] fixed_network_name = needed-for-tempest