Add undercloud_enable_selinux

Expose selinux configuration via the undercloud.conf

Change-Id: I6973fec9bcc55373f89e5c873ff6ae7050fff432
Depends-On: I2109bf62e307df92b6bdb57600c58dd61482f46d
Partial-Bug: #1779005

releasenotes/notes/add-undercloud_enable_selinux-configuration-67d2fb994496ef16.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Add `undercloud_enable_selinux` configuration to the undercloud.conf.
+    This option is a boolean option to enable or disable SELinux during the
+    undercloud installation.

tripleoclient/config/undercloud.py

@@ -250,6 +250,10 @@ class UndercloudConfig(StandaloneConfig):
                             'Whether to enable the debug log level for '
                             'Undercloud OpenStack services.')
                         ),
+            cfg.BoolOpt('undercloud_enable_selinux',
+                        default=True,
+                        help=_('Enable or disable SELinux during the '
+                               'deployment.')),
             cfg.BoolOpt('undercloud_update_packages',
                         default=False,
                         help=_(

tripleoclient/tests/config/test_config_undercloud.py

@@ -61,6 +61,7 @@ class TestUndercloudConfig(base.TestCase):
                     'templates',
                     'undercloud_admin_host',
                     'undercloud_debug',
+                    'undercloud_enable_selinux',
                     'undercloud_hostname',
                     'undercloud_log_file',
                     'undercloud_nameservers',
@@ -119,6 +120,7 @@ class TestUndercloudConfig(base.TestCase):
                     'templates',
                     'undercloud_admin_host',
                     'undercloud_debug',
+                    'undercloud_enable_selinux',
                     'undercloud_hostname',
                     'undercloud_log_file',
                     'undercloud_nameservers',

tripleoclient/v1/undercloud_config.py

@@ -284,6 +284,11 @@ def prepare_undercloud_deploy(upgrade=False, no_validations=False,
     # Parse the undercloud.conf options to include necessary args and
     # yaml files for undercloud deploy command
 
+    if CONF.get('undercloud_enable_selinux'):
+        env_data['SELinuxMode'] = 'enforcing'
+    else:
+        env_data['SELinuxMode'] = 'permissive'
+
     if CONF.get('undercloud_ntp_servers', None):
         env_data['NtpServer'] = CONF['undercloud_ntp_servers'][0]