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Diffstat (limited to 'cloudinit/handlers/cloud_config.py')
| -rw-r--r-- | cloudinit/handlers/cloud_config.py | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/cloudinit/handlers/cloud_config.py b/cloudinit/handlers/cloud_config.py deleted file mode 100644 index cad4dc0f..00000000 --- a/cloudinit/handlers/cloud_config.py +++ /dev/null @@ -1,163 +0,0 @@ -# vi: ts=4 expandtab -# -# Copyright (C) 2012 Canonical Ltd. -# Copyright (C) 2012 Hewlett-Packard Development Company, L.P. -# Copyright (C) 2012 Yahoo! Inc. -# -# Author: Scott Moser <scott.moser@canonical.com> -# Author: Juerg Haefliger <juerg.haefliger@hp.com> -# Author: Joshua Harlow <harlowja@yahoo-inc.com> -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License version 3, as -# published by the Free Software Foundation. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see <http://www.gnu.org/licenses/>. - -import jsonpatch - -from cloudinit import handlers -from cloudinit import log as logging -from cloudinit import mergers -from cloudinit import util - -from cloudinit.settings import (PER_ALWAYS) - -LOG = logging.getLogger(__name__) - -MERGE_HEADER = 'Merge-Type' - -# Due to the way the loading of yaml configuration was done previously, -# where previously each cloud config part was appended to a larger yaml -# file and then finally that file was loaded as one big yaml file we need -# to mimic that behavior by altering the default strategy to be replacing -# keys of prior merges. -# -# -# For example -# #file 1 -# a: 3 -# #file 2 -# a: 22 -# #combined file (comments not included) -# a: 3 -# a: 22 -# -# This gets loaded into yaml with final result {'a': 22} -DEF_MERGERS = mergers.string_extract_mergers('dict(replace)+list()+str()') -CLOUD_PREFIX = "#cloud-config" -JSONP_PREFIX = "#cloud-config-jsonp" - -# The file header -> content types this module will handle. -CC_TYPES = { - JSONP_PREFIX: handlers.type_from_starts_with(JSONP_PREFIX), - CLOUD_PREFIX: handlers.type_from_starts_with(CLOUD_PREFIX), -} - - -class CloudConfigPartHandler(handlers.Handler): - def __init__(self, paths, **_kwargs): - handlers.Handler.__init__(self, PER_ALWAYS, version=3) - self.cloud_buf = None - self.cloud_fn = paths.get_ipath("cloud_config") - if 'cloud_config_path' in _kwargs: - self.cloud_fn = paths.get_ipath(_kwargs["cloud_config_path"]) - self.file_names = [] - - def list_types(self): - return list(CC_TYPES.values()) - - def _write_cloud_config(self): - if not self.cloud_fn: - return - # Capture which files we merged from... - file_lines = [] - if self.file_names: - file_lines.append("# from %s files" % (len(self.file_names))) - for fn in self.file_names: - if not fn: - fn = '?' - file_lines.append("# %s" % (fn)) - file_lines.append("") - if self.cloud_buf is not None: - # Something was actually gathered.... - lines = [ - CLOUD_PREFIX, - '', - ] - lines.extend(file_lines) - lines.append(util.yaml_dumps(self.cloud_buf)) - else: - lines = [] - util.write_file(self.cloud_fn, "\n".join(lines), 0o600) - - def _extract_mergers(self, payload, headers): - merge_header_headers = '' - for h in [MERGE_HEADER, 'X-%s' % (MERGE_HEADER)]: - tmp_h = headers.get(h, '') - if tmp_h: - merge_header_headers = tmp_h - break - # Select either the merge-type from the content - # or the merge type from the headers or default to our own set - # if neither exists (or is empty) from the later. - payload_yaml = util.load_yaml(payload) - mergers_yaml = mergers.dict_extract_mergers(payload_yaml) - mergers_header = mergers.string_extract_mergers(merge_header_headers) - all_mergers = [] - all_mergers.extend(mergers_yaml) - all_mergers.extend(mergers_header) - if not all_mergers: - all_mergers = DEF_MERGERS - return (payload_yaml, all_mergers) - - def _merge_patch(self, payload): - # JSON doesn't handle comments in this manner, so ensure that - # if we started with this 'type' that we remove it before - # attempting to load it as json (which the jsonpatch library will - # attempt to do). - payload = payload.lstrip() - payload = util.strip_prefix_suffix(payload, prefix=JSONP_PREFIX) - patch = jsonpatch.JsonPatch.from_string(payload) - LOG.debug("Merging by applying json patch %s", patch) - self.cloud_buf = patch.apply(self.cloud_buf, in_place=False) - - def _merge_part(self, payload, headers): - (payload_yaml, my_mergers) = self._extract_mergers(payload, headers) - LOG.debug("Merging by applying %s", my_mergers) - merger = mergers.construct(my_mergers) - self.cloud_buf = merger.merge(self.cloud_buf, payload_yaml) - - def _reset(self): - self.file_names = [] - self.cloud_buf = None - - def handle_part(self, data, ctype, filename, payload, frequency, headers): - if ctype == handlers.CONTENT_START: - self._reset() - return - if ctype == handlers.CONTENT_END: - self._write_cloud_config() - self._reset() - return - try: - # First time through, merge with an empty dict... - if self.cloud_buf is None or not self.file_names: - self.cloud_buf = {} - if ctype == CC_TYPES[JSONP_PREFIX]: - self._merge_patch(payload) - else: - self._merge_part(payload, headers) - # Ensure filename is ok to store - for i in ("\n", "\r", "\t"): - filename = filename.replace(i, " ") - self.file_names.append(filename.strip()) - except Exception: - util.logexc(LOG, "Failed at merging in cloud config part from %s", - filename) |