[Openstack] Openstack icehous one controller and two compute node

Fiorenza Meini fmeini at esseweb.eu
Fri Feb 6 14:15:57 UTC 2015

Il 06/02/2015 15:08, Lars Kellogg-Stedman ha scritto:
> On Thu, Feb 05, 2015 at 09:10:43AM +0100, Fiorenza Meini wrote:
>> Thanks for your suggestion, my configuration of tenant_network_types is gre.
>> Neutron has different component:
>> neutron-dhcp-agent
>> neutron-l3-agent
>> neutron-metadata-agent
>> neutron-plugin-openvswitch-agent
>> neutron-server
>> On my second node, I started only neutron-plugin-openvswitch-agent.
>> Which is the virtual network point of union between two nodes ?
> I'm not sure I understand your question...
> Your compute nodes connect to your controller(s) via GRE tunnels,
> which are set up by the Neutron openvswitch agent.  In a typical
> configuration, L3 routing happens on the network host, while the
> compute hosts are stricly L2 environments.
> The compute hosts only need the openvswitch agent, which in addition
> to setting up the tunnels is also responsible managing port
> assignments on the OVS integration bridge, br-int.  All the other
> logic happens on your controller(s), where all the other neutron
> agents are running.
> This is an old post of mine that talks about how things are connected
> in a GRE (or VXLAN) environment:
>    http://blog.oddbit.com/2013/11/14/quantum-in-too-much-detail/
> This post doesn't cover the new hotness that is Neutron DVR or HA
> routers, but it's still a good starting point.

I think  L2 layer is working: I can see this on my second node:

5 DEBUG neutronclient.client [-] RESP:200 {'date': 'Fri, 06 Feb 2015 
13:28:11 GMT', 'content-length': '731', 'content-type': 
'application/json; charset=UTF-8', 'x-openstack-request-id': 
'req-ab82f7a9-b557-44b3-a474-26c8e37003c4'} {"ports": [{"status": 
"ACTIVE", "binding:host_id": "elanor", "allowed_address_pairs": [], 
"extra_dhcp_opts": [], "device_owner": "compute:None", 
"binding:profile": {}, "fixed_ips": [{"subnet_id": 
"42b697f2-2f68-4218-bb86-35337881fdd2", "ip_address": ""}], 
"id": "27e71fa9-5a48-40fc-b006-5593ec34e837", "security_groups": 
["26ead0e4-84e1-4593-b612-f6ddc46f937b"], "device_id": 
"23cbaabb-96df-45be-aefa-ec9c8d114cf0", "name": "", "admin_state_up": 
true, "network_id": "489ec53f-56a8-4e5a-bcc3-f27c68de39f3", "tenant_id": 
"9a26a147891a46249567d793a6e7c9b7", "binding:vif_details": 
{"port_filter": true, "ovs_hybrid_plug": true}, "binding:vnic_type": 
"normal", "binding:vif_type": "ovs", "mac_address": "fa:16:3e:5a:99:14"}]}


The problem is that the VM hasn't the network interface configured with 
the ip, and I see on VM log file that cloud-init cannot 
contact (which I presume is metadata service).

How can I tell to nova-compute on the second node, that metaservice is 
on another host ? I have no more ideas

Fiorenza Meini

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