/
utils.py
831 lines (690 loc) · 27.7 KB
/
utils.py
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# Copyright 2012 OpenStack LLC.
# All Rights Reserved.
#
# 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 collections
from io import BytesIO
import json
from muranopkgcheck import manager as check_manager
from muranopkgcheck import pkg_loader as check_pkg_loader
from muranopkgcheck import validators as check_validators
import os
import re
import shutil
import sys
import tempfile
import textwrap
import uuid
import warnings
import zipfile
from oslo_log import log as logging
from oslo_serialization import jsonutils
from oslo_utils import encodeutils
from oslo_utils import uuidutils
import prettytable
import requests
import urllib
import yaml
import yaql
from muranoclient.common import exceptions
from muranoclient.i18n import _
try:
import yaql.language # noqa
from muranoclient.common.yaqlexpression import YaqlExpression
except ImportError:
# no yaql.language means legacy yaql
from muranoclient.common.yaqlexpression_legacy import YaqlExpression
LOG = logging.getLogger(__name__)
# Decorator for cli-args
def arg(*args, **kwargs):
def _decorator(func):
# Because of the semantics of decorator composition if we just append
# to the options list positional options will appear to be backwards.
func.__dict__.setdefault('arguments', []).insert(0, (args, kwargs))
return func
return _decorator
def json_formatter(js):
return jsonutils.dumps(js, indent=2)
def text_wrap_formatter(d):
return '\n'.join(textwrap.wrap(d or '', 55))
def pretty_choice_list(l):
return ', '.join("'%s'" % i for i in l)
def print_list(objs, fields, field_labels, formatters=None, sortby=0):
if formatters is None:
formatters = {}
pt = prettytable.PrettyTable([f for f in field_labels], caching=False)
pt.align = 'l'
for o in objs:
row = []
for field in fields:
if field in formatters:
row.append(formatters[field](o))
else:
data = getattr(o, field, None) or ''
row.append(data)
pt.add_row(row)
result = encodeutils.safe_encode(pt.get_string())
result = result.decode()
print(result)
def print_dict(d, formatters=None):
if formatters is None:
formatters = {}
pt = prettytable.PrettyTable(['Property', 'Value'], caching=False)
pt.align = 'l'
for field in d.keys():
if field in formatters:
pt.add_row([field, formatters[field](d[field])])
else:
pt.add_row([field, d[field]])
result = encodeutils.safe_encode(pt.get_string(sortby='Property'))
result = result.decode()
print(result)
def find_resource(manager, name_or_id, *args, **kwargs):
"""Helper for the _find_* methods."""
# first try to get entity as integer id
try:
if isinstance(name_or_id, int) or name_or_id.isdigit():
return manager.get(int(name_or_id), *args, **kwargs)
except exceptions.NotFound:
pass
# now try to get entity as uuid
try:
uuid.UUID(str(name_or_id))
return manager.get(name_or_id, *args, **kwargs)
except (ValueError, exceptions.NotFound):
pass
# finally try to find entity by name
try:
return manager.find(name=name_or_id)
except exceptions.NotFound:
msg = "No %s with a name or ID of '%s' exists." % \
(manager.resource_class.__name__.lower(), name_or_id)
raise exceptions.CommandError(msg)
def string_to_bool(arg):
return arg.strip().lower() in ('t', 'true', 'yes', '1')
def env(*vars, **kwargs):
"""Search for the first defined of possibly many env vars
Returns the first environment variable defined in vars, or
returns the default defined in kwargs.
"""
for v in vars:
value = os.environ.get(v, None)
if value:
return value
return kwargs.get('default', '')
def exit(msg=''):
if msg:
print(encodeutils.safe_encode(msg), file=sys.stderr)
sys.exit(1)
def getsockopt(self, *args, **kwargs):
"""Allows us to monkey patch eventlet's GreenSocket
A function which allows us to monkey patch eventlet's
GreenSocket, adding a required 'getsockopt' method.
TODO: (mclaren) we can remove this once the eventlet fix
(https://bitbucket.org/eventlet/eventlet/commits/609f230)
lands in mainstream packages.
NOTE: Already in 0.13, but we can't be sure that all clients
that use python-muranoclient also use newest eventlet
"""
return self.fd.getsockopt(*args, **kwargs)
def exception_to_str(exc):
try:
error = str(exc)
except UnicodeError:
error = ("Caught '%(exception)s' exception." %
{"exception": exc.__class__.__name__})
return encodeutils.safe_encode(error, errors='ignore')
class NoCloseProxy(object):
"""A proxy object, that does nothing on close."""
def __init__(self, obj):
self.obj = obj
def close(self):
return
def __getattr__(self, name):
return getattr(self.obj, name)
class File(object):
def __init__(self, name, binary=True):
self.name = name
self.binary = binary
def open(self):
mode = 'rb' if self.binary else 'r'
if hasattr(self.name, 'read'):
# NOTE(kzaitsev) We do not want to close a file object
# passed to File wrapper. The caller should be responsible
# for closing it
return NoCloseProxy(self.name)
else:
if os.path.isfile(self.name):
return open(self.name, mode)
if os.path.isdir(self.name):
tmp = tempfile.NamedTemporaryFile()
archive = zipfile.ZipFile(tmp, 'w', zipfile.ZIP_DEFLATED)
for root, dirs, files in os.walk(self.name):
for _file in files:
destination = os.path.relpath(
os.path.join(root, _file), os.path.join(self.name))
archive.write(os.path.join(root, _file), destination)
tmp.flush()
return open(tmp.name, mode)
url = urllib.parse.urlparse(self.name)
if url.scheme in ('http', 'https'):
resp = requests.get(self.name, stream=True)
if not resp.ok:
raise ValueError("Got non-ok status({0}) "
"while connecting to {1}".format(
resp.status_code, self.name))
temp_file = tempfile.NamedTemporaryFile(mode='w+b')
for chunk in resp.iter_content(1024 * 1024):
temp_file.write(chunk)
temp_file.flush()
return open(temp_file.name, mode)
raise ValueError("Can't open {0}".format(self.name))
def to_url(filename, base_url, version='', path='/', extension=''):
if urllib.parse.urlparse(filename).scheme in ('http', 'https'):
return filename
if not base_url:
raise ValueError("No base_url for repository supplied")
if '/' in filename or filename in ('.', '..'):
raise ValueError("Invalid filename path supplied: {0}".format(
filename))
version = '.' + version if version else ''
return urllib.parse.urljoin(base_url,
path + filename + version + extension)
class FileWrapperMixin(object):
def __init__(self, file_wrapper):
self.file_wrapper = file_wrapper
try:
self._file = self.file_wrapper.open()
except Exception:
# NOTE(kzaitsev): We need to have _file available at __del__ time.
self._file = None
raise
def file(self):
self._file.seek(0)
return self._file
def close(self):
if self._file and not self._file.closed:
self._file.close()
def save(self, dst, binary=True):
file_name = self.file_wrapper.name
if urllib.parse.urlparse(file_name).scheme:
file_name = file_name.split('/')[-1]
dst = os.path.join(dst, file_name)
mode = 'wb' if binary else 'w'
with open(dst, mode) as dst_file:
self._file.seek(0)
shutil.copyfileobj(self._file, dst_file)
def __del__(self):
self.close()
class Package(FileWrapperMixin):
"""Represents murano package contents."""
@staticmethod
def from_file(file_obj):
if not isinstance(file_obj, File):
file_obj = File(file_obj)
pkg = Package(file_obj)
errs = pkg.validate()
if errs:
raise exceptions.HTTPBadRequest(details=errs)
return pkg
@staticmethod
def fromFile(file_obj):
warnings.warn("Use from_file function", DeprecationWarning)
return Package.from_file(file_obj)
@staticmethod
def from_location(name, base_url='', version='', url='', path=None):
"""Open file using one of three possible options
If path is supplied search for name file in the path, otherwise
if url is supplied - open that url and finally search murano
repository for the package.
"""
if path:
pkg_name = os.path.join(path, name)
file_name = None
for f in [pkg_name, pkg_name + '.zip']:
if os.path.exists(f):
file_name = f
if file_name:
return Package.from_file(file_name)
LOG.error("Couldn't find file for package {0}, tried {1}".format(
name, [pkg_name, pkg_name + '.zip']))
if url:
return Package.from_file(url)
return Package.from_file(to_url(
name,
base_url=base_url,
version=version,
path='apps/',
extension='.zip')
)
def validate(self):
m = check_manager.Manager(self._file,
loader=check_pkg_loader.ZipLoader)
errors = m.validate(
validators=[check_validators.manifest.ManifestValidator],
only_errors=True)
if errors:
fmt = check_manager.PlainTextFormatter().format
return 'Invalid Murano package\n{}\n'.format(fmt(errors))
@property
def contents(self):
"""Contents of a package."""
if not hasattr(self, '_contents'):
try:
self._file.seek(0)
self._zip_obj = zipfile.ZipFile(
BytesIO(self._file.read()))
except Exception as e:
LOG.error("Error {0} occurred,"
" while parsing the package".format(e))
raise
return self._zip_obj
@property
def manifest(self):
"""Parsed manifest file of a package."""
if not hasattr(self, '_manifest'):
try:
self._manifest = yaml.safe_load(
self.contents.open('manifest.yaml'))
except Exception as e:
LOG.error("Error {0} occurred, while extracting "
"manifest from package".format(e))
raise
return self._manifest
def images(self):
"""Returns a list of required image specifications."""
if 'images.lst' not in self.contents.namelist():
return []
try:
return yaml.safe_load(
self.contents.open('images.lst')).get('Images', [])
except Exception:
return []
@property
def resolvers(self):
if not hasattr(self, '_resolvers'):
self.classes
return self._resolvers
@property
def classes(self):
if not hasattr(self, '_classes'):
self._classes = {}
self._resolvers = {}
for class_name, class_file in (
self.manifest.get('Classes', {}).items()):
filename = "Classes/%s" % class_file
if filename not in self.contents.namelist():
continue
klass_list = yaml.load_all(self.contents.open(filename),
DummyYaqlYamlLoader)
if not klass_list:
raise ValueError('No classes defined in file')
resolver = None
for klass in klass_list:
ns = klass.get('Namespaces')
if ns:
resolver = NamespaceResolver(ns)
name = klass.get('Name')
if name and resolver:
name = resolver.resolve_name(name)
if name == class_name:
self._classes[class_name] = klass
self._resolvers[class_name] = resolver
break
return self._classes
@property
def ui(self):
if not hasattr(self, '_ui'):
if 'UI/ui.yaml' in self.contents.namelist():
self._ui = self.contents.open('UI/ui.yaml')
else:
self._ui = None
return self._ui
@property
def logo(self):
if not hasattr(self, '_logo'):
if 'logo.png' in self.contents.namelist():
self._logo = self.contents.open('logo.png')
else:
self._logo = None
return self._logo
def _get_package_order(self, packages_graph):
"""Sorts packages according to dependencies between them
Murano allows cyclic dependencies. It is impossible
to do topological sort for graph with cycles, so at first
graph condensation should be built.
For condensation building Kosaraju's algorithm is used.
Packages in strongly connected components can be situated
in random order to each other.
"""
def topological_sort(graph, start_node):
order = []
not_seen = set(graph)
def dfs(node):
not_seen.discard(node)
for dep_node in graph[node]:
if dep_node in not_seen:
dfs(dep_node)
order.append(node)
dfs(start_node)
return order
def transpose_graph(graph):
transposed = collections.defaultdict(list)
for node, deps in graph.items():
for dep in deps:
transposed[dep].append(node)
return transposed
order = topological_sort(packages_graph, self.manifest['FullName'])
order.reverse()
transposed = transpose_graph(packages_graph)
def top_sort_by_components(graph, component_order):
result = []
seen = set()
def dfs(node):
seen.add(node)
result.append(node)
for dep_node in graph[node]:
if dep_node not in seen:
dfs(dep_node)
for item in component_order:
if item not in seen:
dfs(item)
return reversed(result)
return top_sort_by_components(transposed, order)
def requirements(self, base_url, path=None, dep_dict=None):
"""Scans Require section of manifests of all the dependencies.
Returns a dict with FQPNs as keys and respective Package objects
as values, ordered by topological sort.
:param base_url: url of packages location
:param path: local path of packages location
:param dep_dict: unused. Left for backward compatibility
"""
unordered_requirements = {}
requirements_graph = collections.defaultdict(list)
dep_queue = collections.deque([(self.manifest['FullName'], self)])
while dep_queue:
dep_name, dep_file = dep_queue.popleft()
unordered_requirements[dep_name] = dep_file
direct_deps = Package._get_direct_deps(dep_file, base_url, path)
for name, file in direct_deps:
if name not in unordered_requirements:
dep_queue.append((name, file))
requirements_graph[dep_name] = [dep[0] for dep in direct_deps]
ordered_reqs_names = self._get_package_order(requirements_graph)
ordered_reqs_dict = collections.OrderedDict()
for name in ordered_reqs_names:
ordered_reqs_dict[name] = unordered_requirements[name]
return ordered_reqs_dict
@staticmethod
def _get_direct_deps(package, base_url, path):
result = []
if 'Require' in package.manifest:
for dep_name, ver in package.manifest['Require'].items():
try:
req_file = Package.from_location(
dep_name,
version=ver,
path=path,
base_url=base_url,
)
except Exception as e:
LOG.error("Error {0} occurred while parsing package {1}, "
"required by {2} package".format(
e, dep_name,
package.manifest['FullName']))
continue
result.append((req_file.manifest['FullName'], req_file))
return result
def save_image_local(image_spec, base_url, dst):
dst = os.path.join(dst, image_spec['Name'])
download_url = to_url(
image_spec.get("Url", image_spec['Name']),
base_url=base_url,
path='images/'
)
with open(dst, "w") as image_file:
response = requests.get(download_url, stream=True)
total_length = response.headers.get('content-length')
if total_length is None:
image_file.write(response.content)
else:
dl = 0
total_length = int(total_length)
for chunk in response.iter_content(1024 * 1024):
dl += len(chunk)
image_file.write(chunk)
done = int(50 * dl / total_length)
sys.stdout.write("\r[{0}{1}]".
format('=' * done, ' ' * (50 - done)))
sys.stdout.flush()
sys.stdout.write("\n")
image_file.flush()
def ensure_images(glance_client, image_specs, base_url,
local_path=None,
is_package_public=False):
"""Ensure that images are available
Ensure that images from image_specs are available in glance. If not
attempts: instructs glance to download the images and sets murano-specific
metadata for it.
"""
def _image_valid(image, keys):
for key in keys:
if key not in image:
LOG.warning("Image specification invalid: "
"No {0} key in image ").format(key)
return False
return True
keys = ['Name', 'DiskFormat', 'ContainerFormat', ]
installed_images = []
for image_spec in image_specs:
if not _image_valid(image_spec, keys):
continue
filters = {
'name': image_spec["Name"],
'disk_format': image_spec["DiskFormat"],
'container_format': image_spec["ContainerFormat"],
}
images = glance_client.images.list(filters=filters)
try:
img = next(images).to_dict()
except StopIteration:
img = None
update_metadata = False
if img:
LOG.info("Found desired image {0}, id {1}".format(
img['name'], img['id']))
# check for murano meta-data
if 'murano_image_info' in img.get('properties', {}):
LOG.info("Image {0} already has murano meta-data".format(
image_spec['Name']))
else:
update_metadata = True
else:
LOG.info("Desired image {0} not found attempting "
"to download".format(image_spec['Name']))
update_metadata = True
img_file = None
if local_path:
img_file = os.path.join(local_path, image_spec['Name'])
if img_file and not os.path.exists(img_file):
LOG.error("Image file {0} does not exist."
.format(img_file))
if img_file and os.path.exists(img_file):
img = glance_client.images.create(
name=image_spec['Name'],
container_format=image_spec['ContainerFormat'],
disk_format=image_spec['DiskFormat'],
data=open(img_file, 'rb'),
)
img = img.to_dict()
else:
download_url = to_url(
image_spec.get("Url", image_spec['Name']),
base_url=base_url,
path='images/',
)
LOG.info("Instructing glance to download image {0}".format(
image_spec['Name']))
img = glance_client.images.create(
name=image_spec["Name"],
container_format=image_spec['ContainerFormat'],
disk_format=image_spec['DiskFormat'],
copy_from=download_url)
img = img.to_dict()
if is_package_public:
try:
glance_client.images.update(img['id'], is_public=True)
LOG.debug('Success update for image {0}'.format(img['id']))
except Exception as e:
LOG.exception(_("Error {0} occurred while setting "
"image {1} public").format(e, img['id']))
installed_images.append(img)
if update_metadata and 'Meta' in image_spec:
LOG.info("Updating image {0} metadata".format(
image_spec['Name']))
murano_image_info = jsonutils.dumps(image_spec['Meta'])
glance_client.images.update(
img['id'], properties={'murano_image_info':
murano_image_info})
return installed_images
class Bundle(FileWrapperMixin):
"""Represents murano bundle contents."""
@staticmethod
def from_file(file_obj):
if not isinstance(file_obj, File):
file_obj = File(file_obj, binary=False)
return Bundle(file_obj)
@staticmethod
def fromFile(file_obj):
warnings.warn("Use from_file function", DeprecationWarning)
return Bundle.from_file(file_obj)
def package_specs(self):
"""Get a generator yielding package specifications
Returns a generator yielding package specifications i.e.
dicts with 'Name' and 'Version' fields
"""
self._file.seek(0)
bundle = None
try:
# NOTE(kzaitsev) jsonutils throws a type error here
# see bug 1515231
bundle = json.load(self._file)
except ValueError:
pass
if bundle is None:
try:
bundle = yaml.safe_load(self._file)
except yaml.error.YAMLError:
pass
if bundle is None or 'Packages' not in bundle:
raise ValueError("Can't parse bundle contents")
for package in bundle['Packages']:
if 'Name' not in package:
continue
yield package
def packages(self, base_url='', path=None):
"""Get a generator yielding Package objects
Returns a generator, yielding Package objects for each package
found in the bundle.
"""
for package in self.package_specs():
try:
pkg_obj = Package.from_location(
package['Name'],
version=package.get('Version'),
url=package.get('Url'),
path=path,
base_url=base_url,
)
except Exception as e:
LOG.error("Error {0} occurred while obtaining "
"package {1}".format(e, package['Name']))
continue
yield pkg_obj
class DummyYaqlYamlLoader(yaml.SafeLoader):
"""Constructor that treats !yaql as string."""
pass
DummyYaqlYamlLoader.add_constructor(
u'!yaql', DummyYaqlYamlLoader.yaml_constructors[u'tag:yaml.org,2002:str'])
class YaqlYamlLoader(yaml.SafeLoader):
pass
# workaround for PyYAML bug: http://pyyaml.org/ticket/221
resolvers = {}
for k, v in yaml.SafeLoader.yaml_implicit_resolvers.items():
resolvers[k] = v[:]
YaqlYamlLoader.yaml_implicit_resolvers = resolvers
def yaql_constructor(loader, node):
value = loader.construct_scalar(node)
return YaqlExpression(value)
YaqlYamlLoader.add_constructor(u'!yaql', yaql_constructor)
YaqlYamlLoader.add_implicit_resolver(u'!yaql', YaqlExpression, None)
def traverse_and_replace(obj,
pattern=re.compile(r'^===id(\d+)===$'),
replacements=None):
"""Helper function that traverses object model and substitutes ids.
Recursively checks values of objects found in `obj` against `pattern`,
and replaces strings that match pattern with uuidutils.generate_uuid().
Keeps track of any replacements already made, i.e. ===id1=== would
always be the same, across `obj`. Uses 1st group, found in the `pattern`
regexp as unique identifier of a replacement
"""
if replacements is None:
replacements = collections.defaultdict(
lambda: uuidutils.generate_uuid(dashed=False))
def _maybe_replace(obj, key, value):
"""Check and replace value against pattern"""
if isinstance(value, str):
m = pattern.search(value)
if m:
if m.group(1) not in replacements:
replacements[m.group(1)] = uuidutils.generate_uuid(
dashed=False)
obj[key] = replacements[m.group(1)]
if isinstance(obj, list):
for key, value in enumerate(obj):
if isinstance(value, (list, dict)):
traverse_and_replace(value, pattern, replacements)
else:
_maybe_replace(obj, key, value)
elif isinstance(obj, dict):
for key, value in obj.items():
if isinstance(value, (list, dict)):
traverse_and_replace(value, pattern, replacements)
else:
_maybe_replace(obj, key, value)
else:
_maybe_replace(obj, key, value)
class NamespaceResolver(object):
"""Copied from main murano repo
original at murano/dsl/namespace_resolver.py
"""
def __init__(self, namespaces):
self._namespaces = namespaces
self._namespaces[''] = ''
def resolve_name(self, name, relative=None):
if name is None:
raise ValueError()
if name and name.startswith(':'):
return name[1:]
if ':' in name:
parts = name.split(':')
if len(parts) != 2 or not parts[1]:
raise NameError('Incorrectly formatted name ' + name)
if parts[0] not in self._namespaces:
raise KeyError('Unknown namespace prefix ' + parts[0])
return '.'.join((self._namespaces[parts[0]], parts[1]))
if not relative and '=' in self._namespaces and '.' not in name:
return '.'.join((self._namespaces['='], name))
if relative and '.' not in name:
return '.'.join((relative, name))
return name