diff options
Diffstat (limited to 'cloudinit')
| -rw-r--r-- | cloudinit/sources/helpers/openstack.py | 112 |
1 files changed, 65 insertions, 47 deletions
diff --git a/cloudinit/sources/helpers/openstack.py b/cloudinit/sources/helpers/openstack.py index 3ceec837..2d0fc70e 100644 --- a/cloudinit/sources/helpers/openstack.py +++ b/cloudinit/sources/helpers/openstack.py @@ -21,6 +21,7 @@ import abc import base64 import copy +import httplib import os from cloudinit import ec2_utils @@ -154,9 +155,30 @@ class BaseReader(object): pass @abc.abstractmethod + def _fetch_available_versions(self): + pass + + @abc.abstractmethod def _read_ec2_metadata(self): pass + def _find_working_version(self, version): + search_versions = [version] + list(OS_VERSIONS) + available_versions = self._fetch_available_versions() + for potential_version in search_versions: + if not potential_version: + continue + if potential_version not in available_versions: + continue + if potential_version != version: + LOG.debug("Version '%s' not available, attempting to use" + " version '%s' instead", version, + potential_version) + return potential_version + LOG.debug("Version '%s' not available, attempting to use '%s'" + " instead", version, OS_LATEST) + return OS_LATEST + def _read_content_path(self, item): path = item.get('content_path', '').lstrip("/") path_pieces = path.split("/") @@ -166,10 +188,6 @@ class BaseReader(object): path = self._path_join(self.base_path, "openstack", *path_pieces) return self._path_read(path) - @abc.abstractmethod - def _find_working_version(self, version): - pass - def read_v2(self, version=None): """Reads a version 2 formatted location. @@ -290,6 +308,7 @@ class BaseReader(object): class ConfigDriveReader(BaseReader): def __init__(self, base_path): super(ConfigDriveReader, self).__init__(base_path) + self._versions = None def _path_join(self, base, *add_ons): components = [base] + list(add_ons) @@ -298,22 +317,21 @@ class ConfigDriveReader(BaseReader): def _path_read(self, path): return util.load_file(path) - def _find_working_version(self, version): - search_versions = [version] + list(OS_VERSIONS) - for potential_version in search_versions: - if not potential_version: - continue - path = self._path_join(self.base_path, "openstack", - potential_version) - if os.path.exists(path): - if potential_version != version: - LOG.debug("Version '%s' not available, attempting to use" - " version '%s' instead", version, - potential_version) - return potential_version - LOG.debug("Version '%s' not available, attempting to use '%s'" - " instead", version, OS_LATEST) - return OS_LATEST + def _fetch_available_versions(self): + if self._versions is not None: + return self._versions + else: + versions_available = [] + path = self._path_join(self.base_path, 'openstack') + try: + for child in os.listdir(path): + child_path = os.path.join(path, child) + if os.path.isdir(child_path): + versions_available.append(child) + except (OSError, IOError): + pass + self._versions = tuple(versions_available) + return self._versions def _read_ec2_metadata(self): path = self._path_join(self.base_path, @@ -400,40 +418,40 @@ class MetadataReader(BaseReader): self.ssl_details = ssl_details self.timeout = float(timeout) self.retries = int(retries) + self._versions = None - def _find_working_version(self, version): - search_versions = [version] + list(OS_VERSIONS) - version_path = self._path_join(self.base_path, "openstack") - versions_available = [] - try: - versions = self._path_read(version_path) - except IOError as e: - LOG.warn("Unable to read openstack versions from %s due" - " to: %s", version_path, e) + def _fetch_available_versions(self): + if self._versions is not None: + return self._versions else: - for line in versions.splitlines(): - line = line.strip() - if not line: - continue - versions_available.append(line) - for potential_version in search_versions: - if potential_version not in versions_available: - continue - if potential_version != version: - LOG.debug("Version '%s' not available, attempting to use" - " version '%s' instead", version, - potential_version) - return potential_version - LOG.debug("Version '%s' not available, searched for %s (with available" - " versions being %s), attempting to use '%s' instead", - version, search_versions, versions_available, OS_LATEST) - return OS_LATEST + path = self._path_join(self.base_path, "openstack") + versions_available = [] + try: + versions = self._path_read(path) + except IOError as e: + LOG.warn("Unable to read openstack versions from %s due" + " to: %s", path, e) + else: + for line in versions.splitlines(): + line = line.strip() + if not line: + continue + versions_available.append(line) + self._versions = tuple(versions_available) + return self._versions def _path_read(self, path): + + def should_retry(_request_args, cause): + if cause.code == httplib.NOT_FOUND: + return False + return True + response = url_helper.readurl(path, retries=self.retries, ssl_details=self.ssl_details, - timeout=self.timeout) + timeout=self.timeout, + exception_cb=should_retry) return response.contents def _path_join(self, base, *add_ons): |