Add detection of package manager for undercloud upgrade

In [1] we removed protection for yum not being available.
We should get it back for train because it may still run on
centos-7 and have yum.
[1] 9c53cb3ef5

2. Removed redundant jobs from layout to get the patch in.

Closes-Bug: #1903498
Change-Id: I5a5d942c87af1f97ebc9ff9bc7be7919af564b46

tripleoclient/tests/v1/undercloud/test_install_upgrade.py

@@ -564,6 +564,8 @@ class TestUndercloudUpgrade(TestPluginV1):
         app_args.verbose_level = 1
         self.cmd = undercloud.UpgradeUndercloud(self.app, app_args)
 
+    @mock.patch('os.system')
+    @mock.patch('sys.version_info')
     @mock.patch('tripleoclient.utils.prompt_user_for_confirmation',
                 return_value=True)
     @mock.patch.object(sys, 'executable', 'python2')
@@ -578,11 +580,28 @@ class TestUndercloudUpgrade(TestPluginV1):
                                         mock_subprocess,
                                         mock_wr,
                                         mock_os, mock_copy, mock_user,
-                                        mock_confirm):
+                                        mock_confirm, mock_sys,
+                                        mock_os_sys):
         arglist = ['--no-validations']
         verifylist = []
         parsed_args = self.check_parser(self.cmd, arglist, verifylist)
 
+        mock_sys.major = 3
+        mock_os_sys.return_value = 0
+        # DisplayCommandBase.take_action() returns two tuples
+        self.cmd.take_action(parsed_args)
+        mock_run_command.assert_called_with(
+            ['sudo', 'dnf', 'upgrade', '-y',
+             'python2-tripleoclient',
+             'openstack-tripleo-common',
+             'openstack-tripleo-heat-templates',
+             'openstack-tripleo-validations',
+             'tripleo-ansible'],
+            name='Update extra packages'
+        )
+        mock_os_sys.assert_called_with("which dnf")
+
+        mock_sys.major = 2
         # DisplayCommandBase.take_action() returns two tuples
         self.cmd.take_action(parsed_args)
         mock_run_command.assert_called_with(
@@ -594,6 +613,7 @@ class TestUndercloudUpgrade(TestPluginV1):
              'tripleo-ansible'],
             name='Update extra packages'
         )
+
         mock_subprocess.assert_called_with([
             'openstack', 'undercloud', 'upgrade', '--skip-package-updates',
             '--no-validations'])

tripleoclient/v1/undercloud.py

@@ -182,8 +182,11 @@ class UpgradeUndercloud(InstallUndercloud):
 
         if not packages:
             return
+        pkg_manager = 'yum'
+        if sys.version_info.major >= 3 and os.system('which dnf') == 0:
+            pkg_manager = 'dnf'
 
-        cmd = ['sudo', 'yum', 'upgrade', '-y'] + packages
+        cmd = ['sudo', pkg_manager, 'upgrade', '-y'] + packages
 
         if not dry_run:
             self.log.warning("Updating necessary packages: {}".format(

zuul.d/layout.yaml

@@ -39,32 +39,12 @@
               - ^tripleoclient/v1/tripleo_container_image.py$
         - tripleo-ci-centos-7-scenario000-multinode-oooq-container-upgrades:
             dependencies: *deps_unit_lint
-        - tripleo-ci-centos-8-scenario000-multinode-oooq-container-updates-train:
-            dependencies: *deps_unit_lint
-        - tripleo-ci-centos-8-scenario007-multinode-oooq-container:
-            vars: *multi_consumer_vars
-            dependencies: *deps_cprovider
-        - tripleo-ci-centos-8-scenario001-standalone:
+        - tripleo-ci-centos-8-containers-undercloud-minion:
             vars: &sa_consumer_vars
               consumer_job: true
               build_container_images: false
-              tags:
-                - standalone
-            dependencies: *deps_cprovider
-        - tripleo-ci-centos-8-scenario002-standalone:
-            vars: *sa_consumer_vars
-            dependencies: *deps_cprovider
-        - tripleo-ci-centos-8-scenario003-standalone:
-            vars: *sa_consumer_vars
-            dependencies: *deps_cprovider
-        - tripleo-ci-centos-8-scenario004-standalone:
-            vars: *sa_consumer_vars
-            dependencies: *deps_cprovider
-        - tripleo-ci-centos-8-scenario012-standalone:
-            vars: *sa_consumer_vars
-            dependencies: *deps_cprovider
-        - tripleo-ci-centos-8-containers-undercloud-minion:
-            vars: *sa_consumer_vars
+              remove_tags:
+                - build
             dependencies: *deps_cprovider
             files:
               - ^config-generator/.*minion.*$