Horizon plugin for OpenStack Orchestration (Heat)
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import json
import logging
import django
from django.conf import settings
from django.utils import html
from django.utils.translation import ugettext_lazy as _
from django.views.decorators.debug import sensitive_variables
from oslo_utils import strutils
from horizon import exceptions
from horizon import forms
from horizon import messages
from heat_dashboard import api
from openstack_dashboard.dashboards.project.images \
import utils as image_utils
from openstack_dashboard.dashboards.project.instances \
import utils as instance_utils
LOG = logging.getLogger(__name__)
def create_upload_form_attributes(prefix, input_type, name):
"""Creates attribute dicts for the switchable upload form
:type prefix: str
:param prefix: prefix (environment, template) of field
:type input_type: str
:param input_type: field type (file, raw, url)
:type name: str
:param name: translated text label to display to user
:rtype: dict
:return: an attribute set to pass to form build
"""
attributes = {'class': 'switched', 'data-switch-on': prefix + 'source'}
attributes['data-' + prefix + 'source-' + input_type] = name
return attributes
class TemplateForm(forms.SelfHandlingForm):
class Meta(object):
name = _('Select Template')
help_text = _('Select a template to launch a stack.')
# TODO(jomara) - update URL choice for template & environment files
# w/ client side download when applicable
base_choices = [('file', _('File')),
('raw', _('Direct Input'))]
url_choice = [('url', _('URL'))]
attributes = {'class': 'switchable', 'data-slug': 'templatesource'}
template_source = forms.ChoiceField(label=_('Template Source'),
choices=base_choices + url_choice,
widget=forms.ThemableSelectWidget(
attrs=attributes))
attributes = create_upload_form_attributes(
'template',
'file',
_('Template File'))
template_upload = forms.FileField(
label=_('Template File'),
help_text=_('A local template to upload.'),
widget=forms.FileInput(attrs=attributes),
required=False)
attributes = create_upload_form_attributes(
'template',
'url',
_('Template URL'))
template_url = forms.URLField(
label=_('Template URL'),
help_text=_('An external (HTTP) URL to load the template from.'),
widget=forms.TextInput(attrs=attributes),
required=False)
attributes = create_upload_form_attributes(
'template',
'raw',
_('Template Data'))
template_data = forms.CharField(
label=_('Template Data'),
help_text=_('The raw contents of the template.'),
widget=forms.widgets.Textarea(attrs=attributes),
required=False)
attributes = {'data-slug': 'envsource', 'class': 'switchable'}
environment_source = forms.ChoiceField(
label=_('Environment Source'),
choices=base_choices,
widget=forms.ThemableSelectWidget(attrs=attributes),
required=False)
attributes = create_upload_form_attributes(
'env',
'file',
_('Environment File'))
environment_upload = forms.FileField(
label=_('Environment File'),
help_text=_('A local environment to upload.'),
widget=forms.FileInput(attrs=attributes),
required=False)
attributes = create_upload_form_attributes(
'env',
'raw',
_('Environment Data'))
environment_data = forms.CharField(
label=_('Environment Data'),
help_text=_('The raw contents of the environment file.'),
widget=forms.widgets.Textarea(attrs=attributes),
required=False)
referenced_files = forms.CharField(label=_('Referenced Files'),
widget=forms.widgets.HiddenInput,
required=False)
if django.VERSION >= (1, 9):
# Note(Itxaka): On django>=1.9 Charfield has an strip option that
# we need to set to False as to not hit
# https://bugs.launchpad.net/python-heatclient/+bug/1546166
environment_data.strip = False
template_data.strip = False
def __init__(self, *args, **kwargs):
self.next_view = kwargs.pop('next_view')
super(TemplateForm, self).__init__(*args, **kwargs)
def clean(self):
cleaned = super(TemplateForm, self).clean()
files = self.request.FILES
self.clean_uploaded_files('template', _('template'), cleaned, files)
self.clean_uploaded_files('environment', _('environment'), cleaned,
files)
referenced_files = cleaned.get('referenced_files')
if referenced_files:
referenced_files = json.loads(referenced_files)
elif referenced_files == '':
referenced_files = {}
# Validate the template and get back the params.
kwargs = {}
if cleaned['environment_data']:
kwargs['environment'] = cleaned['environment_data']
try:
files, tpl =\
api.heat.get_template_files(cleaned.get('template_data'),
cleaned.get('template_url'),
referenced_files)
kwargs['files'] = files
kwargs['template'] = tpl
validated = api.heat.template_validate(self.request, **kwargs)
cleaned['template_validate'] = validated
cleaned['template_validate']['files'] = files
cleaned['template_validate']['template'] = tpl
except Exception as e:
raise forms.ValidationError(str(e))
return cleaned
def clean_uploaded_files(self, prefix, field_label, cleaned, files):
"""Cleans Template & Environment data from form upload.
Does some of the crunchy bits for processing uploads vs raw
data depending on what the user specified. Identical process
for environment data & template data.
:type prefix: str
:param prefix: prefix (environment, template) of field
:type field_label: str
:param field_label: translated prefix str for messages
:type input_type: dict
:param prefix: existing cleaned fields from form
:rtype: dict
:return: cleaned dict including environment & template data
"""
upload_str = prefix + "_upload"
data_str = prefix + "_data"
url = cleaned.get(prefix + '_url')
data = cleaned.get(prefix + '_data')
has_upload = upload_str in files
# Uploaded file handler
if has_upload and not url:
log_template_name = files[upload_str].name
LOG.info('got upload %s', log_template_name)
try:
tpl = files[upload_str].read().decode('utf-8')
if tpl.startswith('{'):
json.loads(tpl)
cleaned[data_str] = tpl
except Exception as e:
msg = _('There was a problem parsing the'
' %(prefix)s: %(error)s')
msg = msg % {'prefix': prefix, 'error': str(e)}
raise forms.ValidationError(msg)
# URL handler
elif url and (has_upload or data):
msg = _('Please specify a %s using only one source method.')
msg = msg % field_label
raise forms.ValidationError(msg)
elif prefix == 'template':
# Check for raw template input - blank environment allowed
if not url and not data:
msg = _('You must specify a template via one of the '
'available sources.')
raise forms.ValidationError(msg)
def create_kwargs(self, data):
kwargs = {'parameters': data['template_validate'],
'environment_data': data['environment_data']}
if data.get('stack_id'):
kwargs['stack_id'] = data['stack_id']
return kwargs
def handle(self, request, data):
kwargs = self.create_kwargs(data)
# NOTE (gabriel): This is a bit of a hack, essentially rewriting this
# request so that we can chain it as an input to the next view...
# but hey, it totally works.
request.method = 'GET'
return self.next_view.as_view()(request, **kwargs)
class ChangeTemplateForm(TemplateForm):
class Meta(object):
name = _('Edit Template')
help_text = _('Select a new template to re-launch a stack.')
stack_id = forms.CharField(label=_('Stack ID'),
widget=forms.widgets.HiddenInput)
stack_name = forms.CharField(label=_('Stack Name'),
widget=forms.TextInput(attrs={'readonly':
'readonly'}))
class PreviewTemplateForm(TemplateForm):
class Meta(object):
name = _('Preview Template')
help_text = _('Select a new template to preview a stack.')
class CreateStackForm(forms.SelfHandlingForm):
param_prefix = '__param_'
class Meta(object):
name = _('Create Stack')
environment_data = forms.CharField(
widget=forms.widgets.HiddenInput,
required=False)
if django.VERSION >= (1, 9):
# Note(Itxaka): On django>=1.9 Charfield has an strip option that
# we need to set to False as to not hit
# https://bugs.launchpad.net/python-heatclient/+bug/1546166
environment_data.strip = False
parameters = forms.CharField(
widget=forms.widgets.HiddenInput)
stack_name = forms.RegexField(
max_length=255,
label=_('Stack Name'),
help_text=_('Name of the stack to create.'),
regex=r"^[a-zA-Z][a-zA-Z0-9_.-]*$",
error_messages={'invalid':
_('Name must start with a letter and may '
'only contain letters, numbers, underscores, '
'periods and hyphens.')})
timeout_mins = forms.IntegerField(
initial=60,
label=_('Creation Timeout (minutes)'),
help_text=_('Stack creation timeout in minutes.'))
enable_rollback = forms.BooleanField(
label=_('Rollback On Failure'),
help_text=_('Enable rollback on create/update failure.'),
required=False)
def __init__(self, *args, **kwargs):
parameters = kwargs.pop('parameters')
# special case: load template data from API, not passed in params
if kwargs.get('validate_me'):
parameters = kwargs.pop('validate_me')
super(CreateStackForm, self).__init__(*args, **kwargs)
if self._stack_password_enabled():
self.fields['password'] = forms.CharField(
label=_('Password for user "%s"') % self.request.user.username,
help_text=_('This is required for operations to be performed '
'throughout the lifecycle of the stack'),
widget=forms.PasswordInput())
self._build_parameter_fields(parameters)
def _stack_password_enabled(self):
stack_settings = getattr(settings, 'OPENSTACK_HEAT_STACK', {})
return stack_settings.get('enable_user_pass', True)
def _build_parameter_fields(self, template_validate):
self.help_text = template_validate['Description']
params = template_validate.get('Parameters', {})
if template_validate.get('ParameterGroups'):
params_in_order = []
for group in template_validate['ParameterGroups']:
for param in group.get('parameters', []):
if param in params:
params_in_order.append((param, params[param]))
else:
# no parameter groups, simply sorted to make the order fixed
params_in_order = sorted(params.items())
for param_key, param in params_in_order:
field = None
field_key = self.param_prefix + param_key
initial = param.get('Value',
param.get('DefaultValue',
param.get('Default')))
field_args = {
'initial': initial,
'label': param.get('Label', param_key),
'help_text': html.escape(param.get('Description', '')),
'required': initial is None,
}
param_type = param.get('Type', None)
hidden = strutils.bool_from_string(param.get('NoEcho', 'false'))
if 'CustomConstraint' in param:
choices = self._populate_custom_choices(
param['CustomConstraint'])
field_args['choices'] = choices
field = forms.ChoiceField(**field_args)
elif 'AllowedValues' in param:
choices = map(lambda x: (x, x), param['AllowedValues'])
field_args['choices'] = choices
field = forms.ChoiceField(**field_args)
elif param_type == 'Json' and 'Default' in param:
field_args['initial'] = json.dumps(param['Default'])
field = forms.CharField(**field_args)
elif param_type in ('CommaDelimitedList', 'String', 'Json'):
if 'MinLength' in param:
field_args['min_length'] = int(param['MinLength'])
field_args['required'] = field_args['min_length'] > 0
if 'MaxLength' in param:
field_args['max_length'] = int(param['MaxLength'])
if hidden:
field_args['widget'] = forms.PasswordInput(
render_value=True)
field = forms.CharField(**field_args)
elif param_type == 'Number':
if 'MinValue' in param:
field_args['min_value'] = int(param['MinValue'])
if 'MaxValue' in param:
field_args['max_value'] = int(param['MaxValue'])
field = forms.IntegerField(**field_args)
elif param_type == 'Boolean':
field_args['required'] = False
field = forms.BooleanField(**field_args)
if field:
self.fields[field_key] = field
@sensitive_variables('password')
def handle(self, request, data):
prefix_length = len(self.param_prefix)
params_list = [(k[prefix_length:], v) for (k, v) in data.items()
if k.startswith(self.param_prefix)]
fields = {
'stack_name': data.get('stack_name'),
'timeout_mins': data.get('timeout_mins'),
'disable_rollback': not(data.get('enable_rollback')),
'parameters': dict(params_list),
'files': json.loads(data.get('parameters')).get('files'),
'template': json.loads(data.get('parameters')).get('template')
}
if data.get('password'):
fields['password'] = data.get('password')
if data.get('environment_data'):
fields['environment'] = data.get('environment_data')
try:
api.heat.stack_create(self.request, **fields)
messages.info(request, _("Stack creation started."))
return True
except Exception:
exceptions.handle(request)
def _populate_custom_choices(self, custom_type):
if custom_type == 'neutron.network':
return instance_utils.network_field_data(self.request, True)
if custom_type == 'nova.keypair':
return instance_utils.keypair_field_data(self.request, True)
if custom_type == 'glance.image':
return image_utils.image_field_data(self.request, True)
if custom_type == 'nova.flavor':
return instance_utils.flavor_field_data(self.request, True)
return []
class EditStackForm(CreateStackForm):
class Meta(object):
name = _('Update Stack Parameters')
stack_id = forms.CharField(
label=_('Stack ID'),
widget=forms.widgets.HiddenInput)
stack_name = forms.CharField(
label=_('Stack Name'),
widget=forms.TextInput(attrs={'readonly': 'readonly'}))
timeout_mins = forms.IntegerField(
initial=60,
label=_('Updating Timeout (minutes)'),
help_text=_('Stack updating timeout in minutes.'))
@sensitive_variables('password')
def handle(self, request, data):
prefix_length = len(self.param_prefix)
params_list = [(k[prefix_length:], v) for (k, v) in data.items()
if k.startswith(self.param_prefix)]
stack_id = data.get('stack_id')
fields = {
'stack_name': data.get('stack_name'),
'timeout_mins': data.get('timeout_mins'),
'disable_rollback': not(data.get('enable_rollback')),
'parameters': dict(params_list),
'files': json.loads(data.get('parameters')).get('files'),
'template': json.loads(data.get('parameters')).get('template')
}
if data.get('password'):
fields['password'] = data.get('password')
if data.get('environment_data'):
fields['environment'] = data.get('environment_data')
try:
api.heat.stack_update(self.request, stack_id=stack_id, **fields)
messages.info(request, _("Stack update started."))
return True
except Exception:
exceptions.handle(request)
class PreviewStackForm(CreateStackForm):
class Meta(object):
name = _('Preview Stack Parameters')
def __init__(self, *args, **kwargs):
self.next_view = kwargs.pop('next_view')
super(CreateStackForm, self).__init__(*args, **kwargs)
def handle(self, request, data):
prefix_length = len(self.param_prefix)
params_list = [(k[prefix_length:], v) for (k, v) in data.items()
if k.startswith(self.param_prefix)]
fields = {
'stack_name': data.get('stack_name'),
'timeout_mins': data.get('timeout_mins'),
'disable_rollback': not(data.get('enable_rollback')),
'parameters': dict(params_list),
'files': json.loads(data.get('parameters')).get('files'),
'template': json.loads(data.get('parameters')).get('template')
}
if data.get('environment_data'):
fields['environment'] = data.get('environment_data')
try:
stack_preview = api.heat.stack_preview(self.request, **fields)
request.method = 'GET'
return self.next_view.as_view()(request,
stack_preview=stack_preview)
except Exception:
exceptions.handle(request)