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# Copyright (C) 2013 Yahoo! Inc.
#
# This file is part of cloud-init. See LICENSE file for license information.
"""
Debug
-----
**Summary:** helper to debug cloud-init *internal* datastructures.
This module will enable for outputting various internal information that
cloud-init sources provide to either a file or to the output console/log
location that this cloud-init has been configured with when running.
.. note::
Log configurations are not output.
**Internal name:** ``cc_debug``
**Module frequency:** per instance
**Supported distros:** all
**Config keys**::
debug:
verbose: true/false (defaulting to true)
output: (location to write output, defaulting to console + log)
"""
import copy
from io import StringIO
from cloudinit import type_utils
from cloudinit import util
from cloudinit import safeyaml
SKIP_KEYS = frozenset(['log_cfgs'])
def _make_header(text):
header = StringIO()
header.write("-" * 80)
header.write("\n")
header.write(text.center(80, ' '))
header.write("\n")
header.write("-" * 80)
header.write("\n")
return header.getvalue()
def _dumps(obj):
text = safeyaml.dumps(obj, explicit_start=False, explicit_end=False)
return text.rstrip()
def handle(name, cfg, cloud, log, args):
"""Handler method activated by cloud-init."""
verbose = util.get_cfg_by_path(cfg, ('debug', 'verbose'), default=True)
if args:
# if args are provided (from cmdline) then explicitly set verbose
out_file = args[0]
verbose = True
else:
out_file = util.get_cfg_by_path(cfg, ('debug', 'output'))
if not verbose:
log.debug(("Skipping module named %s,"
" verbose printing disabled"), name)
return
# Clean out some keys that we just don't care about showing...
dump_cfg = copy.deepcopy(cfg)
for k in SKIP_KEYS:
dump_cfg.pop(k, None)
all_keys = list(dump_cfg)
for k in all_keys:
if k.startswith("_"):
dump_cfg.pop(k, None)
# Now dump it...
to_print = StringIO()
to_print.write(_make_header("Config"))
to_print.write(_dumps(dump_cfg))
to_print.write("\n")
to_print.write(_make_header("MetaData"))
to_print.write(_dumps(cloud.datasource.metadata))
to_print.write("\n")
to_print.write(_make_header("Misc"))
to_print.write("Datasource: %s\n" %
(type_utils.obj_name(cloud.datasource)))
to_print.write("Distro: %s\n" % (type_utils.obj_name(cloud.distro)))
to_print.write("Hostname: %s\n" % (cloud.get_hostname(True)))
to_print.write("Instance ID: %s\n" % (cloud.get_instance_id()))
to_print.write("Locale: %s\n" % (cloud.get_locale()))
to_print.write("Launch IDX: %s\n" % (cloud.launch_index))
contents = to_print.getvalue()
content_to_file = []
for line in contents.splitlines():
line = "ci-info: %s\n" % (line)
content_to_file.append(line)
if out_file:
util.write_file(out_file, "".join(content_to_file), 0o644, "w")
else:
util.multi_log("".join(content_to_file), console=True, stderr=False)
# vi: ts=4 expandtab
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