Add an CLI command to reinstall a subcloud

This commit adds a new CLI command to reinstall a subcloud with its
previous install configurations. The reinstall process will reuse
the previous install values and use the same software version as the
system controller.

CLI format:
dcmanager subcloud reinstall <id/name>

Users are required to type "reinstall" to start the reinstall, any
other input will abort the reinstall operation. After the reinstall
and bootstrap tasks complete a subcloud reconfigure command with
deploy_config file is expected to deploy the subcloud and make it
online.

Tests see in https://review.opendev.org/#/c/746615/.

Change-Id: Iecc439ae23cc0f018bcc3d1eebcbf1d0a8b29d45
Story: 2007267
Task: 40731
Depends-On: https://review.opendev.org/#/c/746615/
Signed-off-by: Yuxing Jiang <yuxing.jiang@windriver.com>

distributedcloud-client/dcmanagerclient/api/v1/subcloud_manager.py

@@ -13,7 +13,7 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 #
-# Copyright (c) 2017-2019 Wind River Systems, Inc.
+# Copyright (c) 2017-2020 Wind River Systems, Inc.
 #
 # The right to copy, distribute, modify, or otherwise make use
 # of this software may be licensed only pursuant to the terms
@@ -128,6 +128,18 @@ class subcloud_manager(base.ResourceManager):
         resource.append(self.json_to_resource(json_object))
         return resource
 
+    def subcloud_reinstall(self, url):
+        fields = dict()
+        enc = MultipartEncoder(fields=fields)
+        headers = {'Content-Type': enc.content_type}
+        resp = self.http_client.patch(url, enc, headers=headers)
+        if resp.status_code != 200:
+            self._raise_api_exception(resp)
+        json_object = get_json(resp)
+        resource = list()
+        resource.append(self.json_to_resource(json_object))
+        return resource
+
     def subcloud_list(self, url):
         resp = self.http_client.get(url)
         if resp.status_code != 200:
@@ -224,3 +236,7 @@ class subcloud_manager(base.ResourceManager):
         data = kwargs.get('data')
         url = '/subclouds/%s/reconfigure' % subcloud_ref
         return self.subcloud_reconfigure(url, files, data)
+
+    def reinstall_subcloud(self, subcloud_ref):
+        url = '/subclouds/%s/reinstall' % subcloud_ref
+        return self.subcloud_reinstall(url)

distributedcloud-client/dcmanagerclient/commands/v1/subcloud_manager.py

@@ -22,6 +22,7 @@
 import base64
 import getpass
 import os
+import six
 
 from osc_lib.command import command
 
@@ -557,3 +558,39 @@ class ReconfigSubcloud(base.DCManagerShowOne):
         except Exception:
             error_msg = "Unable to reconfigure subcloud %s" % (subcloud_ref)
             raise exceptions.DCManagerClientException(error_msg)
+
+
+class ReinstallSubcloud(base.DCManagerShowOne):
+    """Reinstall a subcloud."""
+
+    def _get_format_function(self):
+        return detail_format
+
+    def get_parser(self, prog_name):
+        parser = super(ReinstallSubcloud, self).get_parser(prog_name)
+
+        parser.add_argument(
+            'subcloud',
+            help='Name or ID of the subcloud to reinstall.'
+        )
+        return parser
+
+    def _get_resources(self, parsed_args):
+        subcloud_ref = parsed_args.subcloud
+        dcmanager_client = self.app.client_manager.subcloud_manager
+
+        # Require user to type reinstall to confirm
+        print("WARNING: This will reinstall the subcloud. "
+              "All applications and data on the subcloud will be lost.")
+        confirm = six.moves.input(
+            "Please type \"reinstall\" to confirm:").strip().lower()
+        if confirm == 'reinstall':
+            try:
+                return dcmanager_client.subcloud_manager.reinstall_subcloud(
+                    subcloud_ref=subcloud_ref)
+            except Exception:
+                error_msg = "Unable to reinstall subcloud %s" % (subcloud_ref)
+                raise exceptions.DCManagerClientException(error_msg)
+        else:
+            msg = "Subcloud %s will not be reinstalled" % (subcloud_ref)
+            raise exceptions.DCManagerClientException(msg)

distributedcloud-client/dcmanagerclient/shell.py

@@ -490,6 +490,7 @@ class DCManagerShell(app.App):
             'subcloud manage': sm.ManageSubcloud,
             'subcloud update': sm.UpdateSubcloud,
             'subcloud reconfig': sm.ReconfigSubcloud,
+            'subcloud reinstall': sm.ReinstallSubcloud,
             'subcloud-group add': gm.AddSubcloudGroup,
             'subcloud-group delete': gm.DeleteSubcloudGroup,
             'subcloud-group list': gm.ListSubcloudGroup,

distributedcloud-client/dcmanagerclient/tests/v1/test_subcloud_manager.py

@@ -314,3 +314,19 @@ class TestCLISubcloudManagerV1(base.BaseCommandTest):
                               app_args=[ID, '--deploy-config', file_path])
         self.assertTrue('deploy-config file does not exist'
                         in str(e))
+
+    @mock.patch('six.moves.input', return_value='reinstall')
+    def test_reinstall_subcloud(self, mock_input):
+        self.client.subcloud_manager.reinstall_subcloud.\
+            return_value = [SUBCLOUD]
+        actual_call = self.call(
+            subcloud_cmd.ReinstallSubcloud, app_args=[ID])
+        self.assertEqual((ID, NAME,
+                          DESCRIPTION, LOCATION,
+                          SOFTWARE_VERSION, MANAGEMENT_STATE,
+                          AVAILABILITY_STATUS, DEPLOY_STATUS,
+                          MANAGEMENT_SUBNET, MANAGEMENT_START_IP,
+                          MANAGEMENT_END_IP, MANAGEMENT_GATEWAY_IP,
+                          SYSTEMCONTROLLER_GATEWAY_IP,
+                          DEFAULT_SUBCLOUD_GROUP_ID,
+                          TIME_NOW, TIME_NOW), actual_call[1])