Make default_os name and major versions configurable

also enable searching for os names other than redhat os

conf/server.yaml.template

@@ -3,6 +3,13 @@ SERVER:
   HOSTNAMES: []
   #  - replace.with.satellite.hostname
   #  - replace.with.satellite.hostname
+  # default os name and versions used in default_os fixture
+  DEFAULT_OS:
+    NAME: "RedHat"
+    MAJOR_VERSIONS:
+      - 6
+      - 7
+      - 8
   VERSION:
     # The full release version (6.9.2)
     RELEASE: 6.9.2

pytest_fixtures/component/os.py

@@ -2,13 +2,16 @@
 from nailgun import entities
 import pytest
 
+from robottelo.config import settings
+
 
 @pytest.fixture(scope='session')
 def default_os(
     default_architecture,
     default_partitiontable,
     default_pxetemplate,
     request,
+    session_target_sat,
 ):
     """Returns an Operating System entity read from searching Redhat family
 
@@ -17,16 +20,25 @@ def default_os(
     """
     os = getattr(request, 'param', None)
     if os is None:
-        search_string = 'name="RedHat" AND (major="6" OR major="7" OR major="8")'
+        default_name = settings.server.default_os.name
+        default_major_versions = " OR ".join(
+            [f'major="{v}"' for v in settings.server.default_os.major_versions]
+        )
+        search_string = f'name="{default_name}" AND ({default_major_versions})'
     else:
-        version = os.split(' ')[1].split('.')
-        search_string = f'family="Redhat" AND major="{version[0]}" AND minor="{version[1]}"'
-    os = entities.OperatingSystem().search(query={'search': search_string})[0].read()
+        name, version = os.split(' ')
+        version = version.split('.')
+        search_string = f'name="{name}" AND major="{version[0]}" AND minor="{version[1]}"'
+    os = (
+        session_target_sat.OperatingSystem()
+        .search(query={'search': search_string, 'per_page': 50})[0]
+        .read()
+    )
     os.architecture.append(default_architecture)
     os.ptable.append(default_partitiontable)
     os.provisioning_template.append(default_pxetemplate)
     os.update(['architecture', 'ptable', 'provisioning_template'])
-    return entities.OperatingSystem(id=os.id).read()
+    return session_target_sat.OperatingSystem(id=os.id).read()
 
 
 @pytest.fixture(scope='module')
@@ -36,8 +48,6 @@ def module_os():
 
 @pytest.fixture(scope='module')
 def os_path(default_os):
-    from robottelo.config import settings
-
     # Check what OS was found to use correct media
     if default_os.major == "6":
         os_distr_url = settings.repos.rhel6_os

robottelo/config/validators.py

@@ -9,6 +9,8 @@
     server=[
         Validator('server.hostname', default=''),
         Validator('server.hostnames', must_exist=True, is_type_of=list),
+        Validator('server.default_os.name', must_exist=True, default='RedHat'),
+        Validator('server.default_os.major_versions', must_exist=True, default=[6, 7, 8]),
         Validator('server.version.release', must_exist=True),
         Validator('server.version.source', must_exist=True),
         Validator('server.version.rhel_version', must_exist=True, cast=str),