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# Copyright (C) 2017 Canonical Ltd.
#
# This file is part of cloud-init. See LICENSE file for license information.
"""Define 'status' utility and handler as part of cloud-init commandline."""
import argparse
import os
import sys
from time import gmtime, strftime, sleep
from cloudinit.distros import uses_systemd
from cloudinit.stages import Init
from cloudinit.util import get_cmdline, load_file, load_json
CLOUDINIT_DISABLED_FILE = '/etc/cloud/cloud-init.disabled'
# customer visible status messages
STATUS_ENABLED_NOT_RUN = 'not run'
STATUS_RUNNING = 'running'
STATUS_DONE = 'done'
STATUS_ERROR = 'error'
STATUS_DISABLED = 'disabled'
def get_parser(parser=None):
"""Build or extend an arg parser for status utility.
@param parser: Optional existing ArgumentParser instance representing the
status subcommand which will be extended to support the args of
this utility.
@returns: ArgumentParser with proper argument configuration.
"""
if not parser:
parser = argparse.ArgumentParser(
prog='status',
description='Report run status of cloud init')
parser.add_argument(
'-l', '--long', action='store_true', default=False,
help=('Report long format of statuses including run stage name and'
' error messages'))
parser.add_argument(
'-w', '--wait', action='store_true', default=False,
help='Block waiting on cloud-init to complete')
return parser
def handle_status_args(name, args):
"""Handle calls to 'cloud-init status' as a subcommand."""
# Read configured paths
init = Init(ds_deps=[])
init.read_cfg()
status, status_detail, time = _get_status_details(init.paths)
if args.wait:
while status in (STATUS_ENABLED_NOT_RUN, STATUS_RUNNING):
sys.stdout.write('.')
sys.stdout.flush()
status, status_detail, time = _get_status_details(init.paths)
sleep(0.25)
sys.stdout.write('\n')
if args.long:
print('status: {0}'.format(status))
if time:
print('time: {0}'.format(time))
print('detail:\n{0}'.format(status_detail))
else:
print('status: {0}'.format(status))
return 1 if status == STATUS_ERROR else 0
def _is_cloudinit_disabled(disable_file, paths):
"""Report whether cloud-init is disabled.
@param disable_file: The path to the cloud-init disable file.
@param paths: An initialized cloudinit.helpers.Paths object.
@returns: A tuple containing (bool, reason) about cloud-init's status and
why.
"""
is_disabled = False
cmdline_parts = get_cmdline().split()
if not uses_systemd():
reason = 'Cloud-init enabled on sysvinit'
elif 'cloud-init=enabled' in cmdline_parts:
reason = 'Cloud-init enabled by kernel command line cloud-init=enabled'
elif os.path.exists(disable_file):
is_disabled = True
reason = 'Cloud-init disabled by {0}'.format(disable_file)
elif 'cloud-init=disabled' in cmdline_parts:
is_disabled = True
reason = 'Cloud-init disabled by kernel parameter cloud-init=disabled'
elif not os.path.exists(os.path.join(paths.run_dir, 'enabled')):
is_disabled = True
reason = 'Cloud-init disabled by cloud-init-generator'
else:
reason = 'Cloud-init enabled by systemd cloud-init-generator'
return (is_disabled, reason)
def _get_status_details(paths):
"""Return a 3-tuple of status, status_details and time of last event.
@param paths: An initialized cloudinit.helpers.paths object.
Values are obtained from parsing paths.run_dir/status.json.
"""
status = STATUS_ENABLED_NOT_RUN
status_detail = ''
status_v1 = {}
status_file = os.path.join(paths.run_dir, 'status.json')
result_file = os.path.join(paths.run_dir, 'result.json')
(is_disabled, reason) = _is_cloudinit_disabled(
CLOUDINIT_DISABLED_FILE, paths)
if is_disabled:
status = STATUS_DISABLED
status_detail = reason
if os.path.exists(status_file):
if not os.path.exists(result_file):
status = STATUS_RUNNING
status_v1 = load_json(load_file(status_file)).get('v1', {})
errors = []
latest_event = 0
for key, value in sorted(status_v1.items()):
if key == 'stage':
if value:
status = STATUS_RUNNING
status_detail = 'Running in stage: {0}'.format(value)
elif key == 'datasource':
status_detail = value
elif isinstance(value, dict):
errors.extend(value.get('errors', []))
start = value.get('start') or 0
finished = value.get('finished') or 0
if finished == 0 and start != 0:
status = STATUS_RUNNING
event_time = max(start, finished)
if event_time > latest_event:
latest_event = event_time
if errors:
status = STATUS_ERROR
status_detail = '\n'.join(errors)
elif status == STATUS_ENABLED_NOT_RUN and latest_event > 0:
status = STATUS_DONE
if latest_event:
time = strftime('%a, %d %b %Y %H:%M:%S %z', gmtime(latest_event))
else:
time = ''
return status, status_detail, time
def main():
"""Tool to report status of cloud-init."""
parser = get_parser()
sys.exit(handle_status_args('status', parser.parse_args()))
if __name__ == '__main__':
main()
# vi: ts=4 expandtab
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