Open Stack

Hi all,
I'm installing OpenStack using devstack. In my PC I had Mitaka, but since
it is no more available I decided to switch to Ocata.
When Devstack tries to activate keystone I have this error:

2017-07-26 11:35:39.230 9579 INFO keystone.assignment.core
[req-ce831f95-e2a4-4923-9b24-96680b674602 - - - - -] Creating the default
role 9fe2ff9ee4384b1894a90878d3e92bab because it does not exist.
+./stack.sh:main:1067                      create_keystone_accounts
+lib/keystone:create_keystone_accounts:383  local admin_project
++lib/keystone:create_keystone_accounts:384  openstack project show admin
-f value -c id
Discovering versions from the identity service failed when creating the
password plugin. Attempting to determine version from URL.
Could not determine a suitable URL for the plugin
+lib/keystone:create_keystone_accounts:384  admin_project=
+lib/keystone:create_keystone_accounts:1   exit_trap
+./stack.sh:exit_trap:491                  local r=1
++./stack.sh:exit_trap:492                  jobs -p
+./stack.sh:exit_trap:492                  jobs=
+./stack.sh:exit_trap:495                  [[ -n '' ]]
+./stack.sh:exit_trap:501                  kill_spinner
+./stack.sh:kill_spinner:387               '[' '!' -z '' ']'
+./stack.sh:exit_trap:503                  [[ 1 -ne 0 ]]
+./stack.sh:exit_trap:504                  echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:505                  generate-subunit 1501055656 6085
fail
+./stack.sh:exit_trap:506                  [[ -z /opt/stack/logs ]]
+./stack.sh:exit_trap:509
/home/onossona/devstack/tools/worlddump.py -d /opt/stack/logs
World dumping... see /opt/stack/logs/worlddump-2017-07-26-093541.txt for
details
+./stack.sh:exit_trap:515                  exit 1

I'm also attaching my local.conf.

I intend to use openstack with the onos sona plugin, that natively supports
mitaka, but since it is no more available I want to try with a more recent
release of OpenStack.
Could you help me to solve this issue?
I did not find any suitable solution online.
Thanks
-- 
Silvia Fichera
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