Allow environment variables

Allow use environment variables for auth settings in place of options.
These are compatible with python-novaclient's environment variables.

Fixes bug #1098259

Also add set the service_type and add an option to change it

Fixes bug #1089274

Change-Id: I20b5714e19a34d1a29eb33002e32e9dafefe5e9d

doc/command.rst

@@ -36,25 +36,35 @@ Global Options
    URL to use as an endpoint instead of the one specified by the Service
    Catalog
 
+.. option:: --service_type <service-type>
+
+   Alternative service type to use for your cloud provider (default is
+   'hpext:lbaas')
+
 .. option:: --os_auth_url <auth-url>
 
-   The OpenStack authentication URL
+   The OpenStack authentication URL.  Default is ``OS_AUTH_URL`` or
+   ``LIBRA_URL`` environment variables
 
 .. option:: --os_username <auth-user-name>
 
-   The user name to use for authentication
+   The user name to use for authentication.  Default is ``OS_USERNAME`` or
+   ``LIBRA_USERNAME`` environment variables
 
 .. option:: --os_password <auth-password>
 
-   The password to use for authentication
+   The password to use for authentication.  Default is ``OS_PASSWORD`` or
+   ``LIBRA_PASSWORD`` environment variables
 
 .. option:: --os_tenant_name <auth-tenant-name>
 
-   The tenant to authenticate to
+   The tenant to authenticate to.  Default is ``OS_TENANT_NAME`` or
+   ``LIBRA_PROJECT_ID`` environment variables
 
 .. option:: --os_region_name <region-name>
 
-   The region the load balancer is located
+   The region the load balancer is located.  Default is ``OS_REGION_NAME`` or
+   ``LIBRA_REGION_NAME`` environment variables
 
 .. _libra_client-commands:
 

libraclient/client.py

@@ -21,9 +21,7 @@ def main():
     options = ClientOptions()
     args = options.run()
 
-    api = LibraAPI(args.os_username, args.os_password, args.os_tenant_name,
-                   args.os_auth_url, args.os_region_name, args.insecure,
-                   args.debug, args.bypass_url)
+    api = LibraAPI(args)
 
     cmd = args.command.replace('-', '_')
     method = getattr(api, '{cmd}_lb'.format(cmd=cmd))

libraclient/clientoptions.py

@@ -13,6 +13,9 @@
 # under the License.
 
 import argparse
+from novaclient import utils
+
+LIBRA_DEFAULT_SERVICE_TYPE = 'hpext:lbaas'
 
 
 class ClientOptions(object):
@@ -24,30 +27,35 @@ class ClientOptions(object):
             '--os_auth_url',
             metavar='<auth-url>',
             required=True,
+            default=utils.env('OS_AUTH_URL', 'LIBRA_URL'),
             help='Authentication URL'
         )
         self.options.add_argument(
             '--os_username',
             metavar='<auth-user-name>',
             required=True,
+            default=utils.env('OS_USERNAME', 'LIBRA_USERNAME'),
             help='Authentication username'
         )
         self.options.add_argument(
             '--os_password',
             metavar='<auth-password>',
             required=True,
+            default=utils.env('OS_PASSWORD', 'LIBRA_PASSWORD'),
             help='Authentication password'
         )
         self.options.add_argument(
             '--os_tenant_name',
             metavar='<auth-tenant-name>',
             required=True,
+            default=utils.env('OS_TENANT_NAME', 'LIBRA_PROJECT_ID'),
             help='Authentication tenant'
         )
         self.options.add_argument(
             '--os_region_name',
             metavar='<region-name>',
             required=True,
+            default=utils.env('OS_REGION_NAME', 'LIBRAL_REGION_NAME'),
             help='Authentication region'
         )
         self.options.add_argument(
@@ -64,6 +72,12 @@ class ClientOptions(object):
             '--bypass_url',
             help='Use this API endpoint instead of the Service Catalog'
         )
+        self.options.add_argument(
+            '--service_type',
+            default=LIBRA_DEFAULT_SERVICE_TYPE,
+            help='Default ' + LIBRA_DEFAULT_SERVICE_TYPE
+        )
+
         subparsers = self.options.add_subparsers(
             metavar='<subcommand>', dest='command'
         )

libraclient/libraapi.py

@@ -51,18 +51,17 @@ novaclient.exceptions.from_response = from_response
 
 
 class LibraAPI(object):
-    def __init__(self, username, password, tenant, auth_url, region,
-                 insecure, debug, bypass_url):
+    def __init__(self, args):
         self.nova = client.HTTPClient(
-            username,
-            password,
-            tenant,
-            auth_url,
-            region_name=region,
-            service_type='compute',
-            http_log_debug=debug,
-            insecure=insecure,
-            bypass_url=bypass_url
+            args.os_username,
+            args.os_password,
+            args.os_tenant_name,
+            args.os_auth_url,
+            region_name=args.os_region_name,
+            service_type=args.service_type,
+            http_log_debug=args.debug,
+            insecure=args.insecure,
+            bypass_url=args.bypass_url
         )
 
     def limits_lb(self, args):

tests/test_lbaas_client.py

@@ -30,12 +30,25 @@ class DummyModifyArgs(object):
         self.name = 'a-modified-loadbalancer'
         self.algorithm = 'LEAST_CONNECTIONS'
 
+class MockLibraArgs(object):
+    def __init__(self, username, password, tenant, auth_url, region):
+        self.os_username=username
+        self.os_password=password
+        self.os_tenant_name=tenant
+        self.os_auth_url=auth_url
+        self.os_region_name=region
+        self.service_type='compute'
+        self.debug=False
+        self.insecure=False
+        self.bypass_url=None
+
 class MockLibraAPI(LibraAPI):
     """ Used to capture data that would be sent to the API server """
     def __init__(self, username, password, tenant, auth_url, region):
         self.postdata = None
         self.putdata = None
-        return super(MockLibraAPI, self).__init__(username, password, tenant, auth_url, region, False, False, None)
+        args=MockLibraArgs(username, password, tenant, auth_url, region)
+        return super(MockLibraAPI, self).__init__(args)
     def _post(self, url, **kwargs):
         """ Store the post data and execute as normal """
         self.postdata = kwargs['body']