Remove support for CentOS 7

With the move to RHEL/CentOS 8 we no longer have Python 2 in our images
so there is no need for checking which Python version (2.x or 3.x) is
used inside of containers.

We also no longer have to support yum as a value for
distro_package_manager.

Partially-Implements: blueprint centos-rhel-8

Change-Id: Ie45cf3465fedddbde7856961527421883ba3d5c9

2 files changed, 10 insertions, 37 deletions

diff --git a/kolla/tests/test_build.py b/kolla/tests/test_build.py
index 1b633de4c..ad5e47600 100644
--- a/kolla/tests/test_build.py
+++ b/kolla/tests/test_build.py
@@ -551,19 +551,12 @@ class KollaWorkerTest(base.TestCase):
         kolla = build.KollaWorker(self.conf)
         self.assertEqual('3.6', kolla.distro_python_version)
 
-    def test_build_distro_python_version_centos7(self):
-        """check distro_python_version for CentOS 7.6.1810"""
+    def test_build_distro_python_version_centos(self):
+        """check distro_python_version for CentOS 8.0.1905"""
         self.conf.set_override('base', 'centos')
-        self.conf.set_override('base_tag', '7.6.1810')
+        self.conf.set_override('base_tag', '8.0.1905')
         kolla = build.KollaWorker(self.conf)
-        self.assertEqual('2.7', kolla.distro_python_version)
-
-    def test_build_distro_python_version_rhel7(self):
-        """check distro_python_version for RHEL7"""
-        self.conf.set_override('base', 'rhel')
-        self.conf.set_override('base_tag', '7')
-        kolla = build.KollaWorker(self.conf)
-        self.assertEqual('2.7', kolla.distro_python_version)
+        self.assertEqual('3.6', kolla.distro_python_version)
 
     def test_build_distro_package_manager(self):
         """check distro_package_manager conf value is taken"""
@@ -585,20 +578,6 @@ class KollaWorkerTest(base.TestCase):
         kolla = build.KollaWorker(self.conf)
         self.assertEqual('dnf', kolla.distro_package_manager)
 
-    def test_build_distro_package_manager_rhel7(self):
-        """check distro_package_manager yum for rhel7"""
-        self.conf.set_override('base', 'rhel')
-        self.conf.set_override('base_tag', '7')
-        kolla = build.KollaWorker(self.conf)
-        self.assertEqual('yum', kolla.distro_package_manager)
-
-    def test_build_distro_package_manager_rhel7_minor(self):
-        """check distro_package_manager yum for rhel7"""
-        self.conf.set_override('base', 'rhel')
-        self.conf.set_override('base_tag', '7.6.1801')
-        kolla = build.KollaWorker(self.conf)
-        self.assertEqual('yum', kolla.distro_package_manager)
-
     def test_build_distro_package_manager_debian(self):
         """check distro_package_manager apt for debian"""
         self.conf.set_override('base', 'debian')
diff --git a/kolla/tests/test_methods.py b/kolla/tests/test_methods.py
index c33aba7f9..d2f6ac283 100644
--- a/kolla/tests/test_methods.py
+++ b/kolla/tests/test_methods.py
@@ -27,7 +27,6 @@ class MethodsTest(base.TestCase):
             'base_arch': 'x86_64',
             'base_distro': 'rhel',
             'base_package_type': 'rpm',
-            'distro_package_manager': 'yum'
         }
 
         result = methods.handle_repos(template_vars, ['grafana'], 'enable')
@@ -39,11 +38,10 @@ class MethodsTest(base.TestCase):
             'base_arch': 'x86_64',
             'base_distro': 'centos',
             'base_package_type': 'rpm',
-            'distro_package_manager': 'yum'
         }
 
         result = methods.handle_repos(template_vars, ['grafana'], 'enable')
-        expectCmd = 'RUN yum-config-manager  --enable grafana'
+        expectCmd = 'RUN dnf config-manager  --enable grafana || true'
         self.assertEqual(expectCmd, result)
 
     def test_enable_repos_centos_missing_repo(self):
@@ -51,7 +49,6 @@ class MethodsTest(base.TestCase):
             'base_arch': 'x86_64',
             'base_distro': 'centos',
             'base_package_type': 'rpm',
-            'distro_package_manager': 'yum'
         }
 
         result = methods.handle_repos(template_vars, ['missing_repo'],
@@ -64,13 +61,12 @@ class MethodsTest(base.TestCase):
             'base_arch': 'x86_64',
             'base_distro': 'centos',
             'base_package_type': 'rpm',
-            'distro_package_manager': 'yum'
         }
 
         result = methods.handle_repos(template_vars, ['grafana', 'ceph'],
                                       'enable')
-        expectCmd = 'RUN yum-config-manager  --enable grafana '
-        expectCmd += '--enable centos-ceph-nautilus'
+        expectCmd = 'RUN dnf config-manager  --enable grafana '
+        expectCmd += '--enable centos-ceph-nautilus || true'
         self.assertEqual(expectCmd, result)
 
     def test_enable_repos_debian(self):
@@ -118,11 +114,10 @@ class MethodsTest(base.TestCase):
             'base_arch': 'x86_64',
             'base_distro': 'centos',
             'base_package_type': 'rpm',
-            'distro_package_manager': 'yum'
         }
 
         result = methods.handle_repos(template_vars, ['grafana'], 'disable')
-        expectCmd = 'RUN yum-config-manager  --disable grafana'
+        expectCmd = 'RUN dnf config-manager  --disable grafana || true'
         self.assertEqual(expectCmd, result)
 
     def test_disable_repos_centos_multiple(self):
@@ -130,13 +125,12 @@ class MethodsTest(base.TestCase):
             'base_arch': 'x86_64',
             'base_distro': 'centos',
             'base_package_type': 'rpm',
-            'distro_package_manager': 'yum'
         }
 
         result = methods.handle_repos(template_vars, ['grafana', 'ceph'],
                                       'disable')
-        expectCmd = 'RUN yum-config-manager  --disable grafana '
-        expectCmd += '--disable centos-ceph-nautilus'
+        expectCmd = 'RUN dnf config-manager  --disable grafana '
+        expectCmd += '--disable centos-ceph-nautilus || true'
         self.assertEqual(expectCmd, result)
 
     # NOTE(hrw): there is no disabling of repos for Debian/Ubuntu