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On 02/21/2016 11:40 PM, Andrey Kurilin wrote:
> Hi!
> `novaclient.client.Client` entry-point supports almost the same
> arguments as `novaclient.v2.client.Client`. The difference is only in
> api_version, so you can set up region via `novaclient.client.Client` in
> the same way as `novaclient.v2.client.Client`.

The easiest way to get a properly constructed nova Client is with 
os-client-config:

import os_client_config

OS_PROJECT_NAME="d8af8a8f-a573-48e6-898a-af333b970a2d"
OS_USERNAME="0b8c435b-cc4d-4e05-8a47-a2ada0539af1"
OS_PASSWORD="REDACTED"
OS_AUTH_URL="http://auth.vexxhost.net"
OS_REGION_NAME="ca-ymq-1"

client = os_client_config.make_client(
     'compute',
     auth_url=OS_AUTH_URL, username=OS_USERNAME,
     password=OS_PASSWORD, project_name=OS_PROJECT_NAME,
     region_name=OS_REGION_NAME)

The upside is that the constructor interface is the same for all of the 
rest of the client libs too (just change the first argument) - and it 
will also read in OS_ env vars or named clouds from clouds.yaml if you 
have them set.

(The 'simplest' way is to put your auth and region information into a 
clouds.yaml file like this:

http://docs.openstack.org/developer/os-client-config/#site-specific-file-locations

Such as:

# ~/.config/openstack/clouds.yaml
clouds:
   vexxhost:
      profile: vexxhost
      auth:
        project_name: d8af8a8f-a573-48e6-898a-af333b970a2d
        username: 0b8c435b-cc4d-4e05-8a47-a2ada0539af1
        password: REDACTED
      region_name: ca-ymq-1


And do:

client = os_client_config.make_client('compute', cloud='vexxhost')


If you don't want to do that for some reason but you'd like to construct 
a novaclient Client object by hand:


from keystoneauth1 import loading
from keystoneauth1 import session as ksa_session
from novaclient import client as nova_client

OS_PROJECT_NAME="d8af8a8f-a573-48e6-898a-af333b970a2d"
OS_USERNAME="0b8c435b-cc4d-4e05-8a47-a2ada0539af1"
OS_PASSWORD="REDACTED"
OS_AUTH_URL="http://auth.vexxhost.net"
OS_REGION_NAME="ca-ymq-1"

# Get the auth loader for the password auth plugin
loader = loading.get_plugin_loader('password')
# Construct the auth plugin
auth_plugin = loader.load_from_options(
     auth_url=OS_AUTH_URL, username=OS_USERNAME, password=OS_PASSWORD,
     project_name=OS_PROJECT_NAME)

# Construct a keystone session
# Other arguments that are potentially useful here are:
#  verify - bool, whether or not to verify SSL connection validity
#  cert - SSL cert information
#  timout - time in seconds to use for connection level TCP timeouts
session = ksa_session.Session(auth_plugin)

# Now make the client
# Other arguments you may be interested in:
#  service_name - if you need to specify a service name for finding the
#                 right service in the catalog
#  service_type - if the cloud in question has given a different
#                 service type (should be 'compute' for nova - but
#                 novaclient sets it, so it's safe to omit in most cases
#  endpoint_override - if you want to tell it to use a different URL
#                      than what the keystone catalog returns
#  endpoint_type - if you need to specify admin or internal
#                  endpoints rather than the default 'public'
#                  Note that in glance and barbican, this key is called
#                  'interface'
client = nova_client.Client(
     version='2.0', # or set the specific microversion you want
     session=session, region_name=OS_REGION_NAME)

It might be clear why I prefer the os_client_config factory function 
instead - but what I prefer and what you prefer might not be the same 
thing. :)

> On Mon, Feb 22, 2016 at 6:11 AM, Xav Paice <xavpaice at gmail.com
> <mailto:xavpaice at gmail.com>> wrote:
>
>     Hi,
>
>     In http://docs.openstack.org/developer/python-novaclient/api.html
>     it's got some pretty clear instructions not to
>     use novaclient.v2.client.Client but I can't see another way to
>     specify the region - there's more than one in my installation, and
>     no param for region in novaclient.client.Client
>
>     Shall I hunt down/write a blueprint for that?
>
>     __________________________________________________________________________
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>
>
> --
> Best regards,
> Andrey Kurilin.
>
>
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