horizon  20.1.2
About: OpenStack Horizon (Optional Service: Dashboard) provides a web-based self-service portal to interact with underlying OpenStack services, such as launching an instance, assigning IP addresses and configuring access controls.
The "Xena" series (latest release).
  Fossies Dox: horizon-20.1.2.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

resize_instance.py
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1# Copyright 2013 CentRin Data, Inc.
2#
3# Licensed under the Apache License, Version 2.0 (the "License"); you may
4# not use this file except in compliance with the License. You may obtain
5# a copy of the License at
6#
7# http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12# License for the specific language governing permissions and limitations
13# under the License.
14
15
16import json
17
18from django.utils import encoding
19from django.utils.translation import ugettext_lazy as _
20from django.views.decorators.debug import sensitive_variables
21
22from horizon import exceptions
23from horizon import forms
24from horizon import workflows
25from openstack_dashboard import api
27 import utils as instance_utils
29 import create_instance
30
31
32class SetFlavorChoiceAction(workflows.Action):
33 old_flavor_id = forms.CharField(required=False, widget=forms.HiddenInput())
34 old_flavor_name = forms.CharField(
35 label=_("Old Flavor"),
36 widget=forms.TextInput(attrs={'readonly': 'readonly'}),
37 required=False,
38 )
39 flavor = forms.ThemableChoiceField(
40 label=_("New Flavor"),
41 help_text=_("Choose the flavor to launch."))
42
43 class Meta(object):
44 name = _("Flavor Choice")
45 slug = 'flavor_choice'
46 help_text_template = ("project/instances/"
47 "_flavors_and_quotas.html")
48
49 def populate_flavor_choices(self, request, context):
50 old_flavor_name = context.get('old_flavor_name')
51 flavors = context.get('flavors').values()
52
53 # Remove current flavor from the list of flavor choices
54 flavors = [flavor for flavor in flavors
55 if flavor.name != old_flavor_name]
56
57 if flavors:
58 if len(flavors) > 1:
59 flavors = instance_utils.sort_flavor_list(request, flavors)
60 else:
61 flavor = flavors[0]
62 flavors = [(flavor.id, flavor.name)]
63 flavors.insert(0, ("", _("Select a New Flavor")))
64 else:
65 flavors.insert(0, ("", _("No flavors available")))
66 return flavors
67
68 def get_help_text(self, extra_context=None):
69 extra = {} if extra_context is None else dict(extra_context)
70 try:
71 extra['usages'] = api.nova.tenant_absolute_limits(self.request,
72 reserved=True)
73 extra['usages_json'] = json.dumps(extra['usages'])
74 flavors = json.dumps([f._info for f in
75 instance_utils.flavor_list(self.request)])
76 extra['flavors'] = flavors
77 extra['resize_instance'] = True
78 except Exception:
79 exceptions.handle(self.request,
80 _("Unable to retrieve quota information."))
81 return super().get_help_text(extra)
82
83
84class SetFlavorChoice(workflows.Step):
85 action_class = SetFlavorChoiceAction
86 depends_on = ("instance_id", "name")
87 contributes = ("old_flavor_id", "old_flavor_name", "flavors", "flavor")
88
89
90class ResizeInstance(workflows.Workflow):
91 slug = "resize_instance"
92 name = _("Resize Instance")
93 finalize_button_name = _("Resize")
94 success_message = _('Request for resizing of instance "%s" '
95 'has been submitted.')
96 failure_message = _('Unable to resize instance "%s".')
97 success_url = "horizon:project:instances:index"
98 default_steps = (SetFlavorChoice, create_instance.SetAdvanced)
99
100 def format_status_message(self, message):
101 if "%s" in message:
102 return message % self.context.get('name', 'unknown instance')
103 return message
104
105 @sensitive_variables('context')
106 def handle(self, request, context):
107 instance_id = context.get('instance_id', None)
108 flavor = context.get('flavor', None)
109 disk_config = context.get('disk_config', None)
110 try:
111 api.nova.server_resize(request, instance_id, flavor, disk_config)
112 return True
113 except Exception as e:
114 self.failure_message = encoding.force_text(e)
115 return False