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Hi. I'm also a newbie in OpenStack technology and I have a very similar trouble. When I try to launch an instance, status goes through Scheduling, Networking, Spawning and ends in Error when I try to launch from a Volume, and goes directly to Error, if I don't select a volume. Keypair is configured, a private network is configured and still is not working.

In computer node (node2), "nova list" command returns nothing, and listing /var/lib/nova shows:

./instances:
total 20K
drwxr-xr-x 4 nova nova 4.0K Mar 19 11:25 .
drwxr-xr-x 9 nova nova 4.0K Mar 18 10:02 ..
drwxr-xr-x 2 nova nova 4.0K Mar 19 08:12 _base
-rw-r--r-- 1 nova nova   28 Mar 19 11:21 compute_nodes
drwxr-xr-x 2 nova nova 4.0K Mar 19 08:12 locks

./instances/_base:
total 814M
drwxr-xr-x 2 nova nova 4.0K Mar 19 08:12 .
drwxr-xr-x 4 nova nova 4.0K Mar 19 11:25 ..
-rw-r--r-- 1 nova nova 2.2G Mar 19 10:41 58ae19aba5fa0e09d82627d319ad17eb9f5fc4d6
-rw-r--r-- 1 nova nova  40M Mar 19 11:21 7aeb628c3dc777fd7b8ed1c1be48650620077532

./instances/locks:
total 8.0K
drwxr-xr-x 2 nova nova 4.0K Mar 19 08:12 .
drwxr-xr-x 4 nova nova 4.0K Mar 19 11:25 ..
-rw-r--r-- 1 nova nova    0 Mar 19 08:11 nova-58ae19aba5fa0e09d82627d319ad17eb9f5fc4d6
-rw-r--r-- 1 nova nova    0 Mar 19 08:11 nova-7aeb628c3dc777fd7b8ed1c1be48650620077532
-rw-r--r-- 1 nova nova    0 Mar 19 08:12 nova-_var_lib_nova_instances__base_58ae19aba5fa0e09d82627d319ad17eb9f5fc4d6
-rw-r--r-- 1 nova nova    0 Mar 19 10:56 nova-_var_lib_nova_instances__base_7aeb628c3dc777fd7b8ed1c1be48650620077532

In controller node (controler) "nova-manage service list" shows:

# nova-manage service list
Binary           Host                                 Zone             Status     State Updated_At
nova-consoleauth controller                           internal         enabled    :-)   2014-03-19 11:31:43
nova-cert        controller                           internal         enabled    :-)   2014-03-19 11:31:43
nova-scheduler   controller                           internal         enabled    :-)   2014-03-19 11:31:52
nova-conductor   controller                           internal         enabled    :-)   2014-03-19 11:31:50
nova-compute     node2                                nova             enabled    :-)   2014-03-19 11:31:47

I'm thinking that I'm in a deadlock, Can someone help me??

Best regards, Roberto