Use inventory object to validate the hosts and services

inventory complete the hosts and services check, we should use it
rather than complete it again[1]

[1]: https://review.opendev.org/#/c/673537/

Change-Id: Iad1e78be8cba0e378a623d17ad408b3e43a48daf

kolla_cli/api/exceptions.py

@@ -69,16 +69,6 @@ class InvalidConfiguration(ClientException):
     pass
 
 
-class InvalidHosts(ClientException):
-    """Invalid hosts"""
-    pass
-
-
-class InvalidServices(ClientException):
-    """Invalid services"""
-    pass
-
-
 class FailedOperation(ClientException):
     pass
 

kolla_cli/common/ansible/utils.py

@@ -12,10 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from kolla_cli.api.exceptions import InvalidHosts
-from kolla_cli.api.exceptions import InvalidServices
 from kolla_cli.common.inventory import Inventory
-import kolla_cli.i18n as u
 
 
 def check_kolla_args(hostnames=[], servicenames=[]):
@@ -25,18 +22,7 @@ def check_kolla_args(hostnames=[], servicenames=[]):
 
     inventory = Inventory.load()
     if hostnames:
-        all_hosts = inventory.get_hostnames()
-        invalid_hosts = list(set(hostnames) - set(all_hosts))
-        if invalid_hosts:
-            raise InvalidHosts(
-                u._('Hosts {hosts} are not valid.').format(
-                    hosts=invalid_hosts))
+        inventory.validate_hostnames(hostnames)
 
     if servicenames:
-        all_services = [service.name
-                        for service in inventory.get_services()]
-        invalid_services = list(set(servicenames) - set(all_services))
-        if invalid_services:
-            raise InvalidServices(
-                u._('Services {services} are not valid.').format(
-                    services=invalid_services))
+        inventory.validate_servicenames(servicenames)