148 lines
4.2 KiB
Python
148 lines
4.2 KiB
Python
# Copyright 2018 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import contextlib
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import logging
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import re
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import sys
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from openstack import exceptions as os_exc
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import six
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from metalsmith import exceptions
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LOG = logging.getLogger(__name__)
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def log_res(res):
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if res is None:
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return None
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elif getattr(res, 'name', None):
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return '%s (UUID %s)' % (res.name, res.id)
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else:
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return res.id
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def get_capabilities(node):
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caps = node.properties.get('capabilities') or {}
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if not isinstance(caps, dict):
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caps = dict(x.split(':', 1) for x in caps.split(',') if x)
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return caps
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def get_root_disk(root_size_gb, node):
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"""Validate and calculate the root disk size."""
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if root_size_gb is not None:
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if not isinstance(root_size_gb, int):
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raise TypeError("The root_size_gb argument must be "
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"a positive integer, got %r" % root_size_gb)
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elif root_size_gb <= 0:
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raise ValueError("The root_size_gb argument must be "
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"a positive integer, got %d" % root_size_gb)
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else:
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try:
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assert int(node.properties['local_gb']) > 0
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except KeyError:
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LOG.debug('No local_gb for node %s and no root partition size '
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'specified', log_res(node))
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return
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except (TypeError, ValueError, AssertionError):
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raise exceptions.UnknownRootDiskSize(
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'The local_gb for node %(node)s is invalid: '
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'expected positive integer, got %(value)s' %
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{'node': log_res(node),
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'value': node.properties['local_gb']})
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# allow for partitioning and config drive
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root_size_gb = int(node.properties['local_gb']) - 1
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return root_size_gb
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_HOSTNAME_RE = re.compile(r"""^
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[a-z0-9][a-z0-9\-]{0,61}[a-z0-9] # host
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(\.[a-z0-9][a-z0-9\-]{0,61}[a-z0-9])* # domain
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$""", re.IGNORECASE | re.VERBOSE)
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def is_hostname_safe(hostname):
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"""Check for valid host name.
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Nominally, checks that the supplied hostname conforms to:
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* http://en.wikipedia.org/wiki/Hostname
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* http://tools.ietf.org/html/rfc952
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* http://tools.ietf.org/html/rfc1123
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:param hostname: The hostname to be validated.
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:returns: True if valid. False if not.
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"""
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if not isinstance(hostname, six.string_types) or len(hostname) > 255:
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return False
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return _HOSTNAME_RE.match(hostname) is not None
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def check_hostname(hostname):
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"""Check the provided host name.
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:raises: ValueError on inappropriate value of ``hostname``
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"""
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if hostname is not None and not is_hostname_safe(hostname):
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raise ValueError("%s cannot be used as a hostname" % hostname)
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def parse_checksums(checksums):
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"""Parse standard checksums file."""
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result = {}
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for line in checksums.split('\n'):
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if not line.strip():
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continue
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checksum, fname = line.strip().split(None, 1)
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result[fname.strip().lstrip('*')] = checksum.strip()
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return result
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def default_hostname(node):
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if node.name and is_hostname_safe(node.name):
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return node.name
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else:
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return node.id
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def hostname_for(node, allocation=None):
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if allocation is not None and allocation.name:
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return allocation.name
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else:
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return default_hostname(node)
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@contextlib.contextmanager
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def reraise_os_exc(reraise_as, failure_message='Clean up failed'):
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exc_info = sys.exc_info()
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is_expected = isinstance(exc_info[1], os_exc.SDKException)
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try:
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yield is_expected
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except Exception:
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LOG.exception(failure_message)
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if is_expected:
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raise reraise_as(str(exc_info[1]))
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else:
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six.reraise(*exc_info)
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