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# Copyright (C) 2017 Canonical Ltd.
#
# This file is part of cloud-init. See LICENSE file for license information.
import argparse
import re
import sys
from . import dump
from . import show
def get_parser(parser=None):
if not parser:
parser = argparse.ArgumentParser(
prog='cloudinit-analyze',
description='Devel tool: Analyze cloud-init logs and data')
subparsers = parser.add_subparsers(title='Subcommands', dest='subcommand')
subparsers.required = True
parser_blame = subparsers.add_parser(
'blame', help='Print list of executed stages ordered by time to init')
parser_blame.add_argument(
'-i', '--infile', action='store', dest='infile',
default='/var/log/cloud-init.log',
help='specify where to read input.')
parser_blame.add_argument(
'-o', '--outfile', action='store', dest='outfile', default='-',
help='specify where to write output. ')
parser_blame.set_defaults(action=('blame', analyze_blame))
parser_show = subparsers.add_parser(
'show', help='Print list of in-order events during execution')
parser_show.add_argument('-f', '--format', action='store',
dest='print_format', default='%I%D @%Es +%ds',
help='specify formatting of output.')
parser_show.add_argument('-i', '--infile', action='store',
dest='infile', default='/var/log/cloud-init.log',
help='specify where to read input.')
parser_show.add_argument('-o', '--outfile', action='store',
dest='outfile', default='-',
help='specify where to write output.')
parser_show.set_defaults(action=('show', analyze_show))
parser_dump = subparsers.add_parser(
'dump', help='Dump cloud-init events in JSON format')
parser_dump.add_argument('-i', '--infile', action='store',
dest='infile', default='/var/log/cloud-init.log',
help='specify where to read input. ')
parser_dump.add_argument('-o', '--outfile', action='store',
dest='outfile', default='-',
help='specify where to write output. ')
parser_dump.set_defaults(action=('dump', analyze_dump))
return parser
def analyze_blame(name, args):
"""Report a list of records sorted by largest time delta.
For example:
30.210s (init-local) searching for datasource
8.706s (init-network) reading and applying user-data
166ms (modules-config) ....
807us (modules-final) ...
We generate event records parsing cloud-init logs, formatting the output
and sorting by record data ('delta')
"""
(infh, outfh) = configure_io(args)
blame_format = ' %ds (%n)'
r = re.compile('(^\s+\d+\.\d+)', re.MULTILINE)
for idx, record in enumerate(show.show_events(_get_events(infh),
blame_format)):
srecs = sorted(filter(r.match, record), reverse=True)
outfh.write('-- Boot Record %02d --\n' % (idx + 1))
outfh.write('\n'.join(srecs) + '\n')
outfh.write('\n')
outfh.write('%d boot records analyzed\n' % (idx + 1))
def analyze_show(name, args):
"""Generate output records using the 'standard' format to printing events.
Example output follows:
Starting stage: (init-local)
...
Finished stage: (init-local) 0.105195 seconds
Starting stage: (init-network)
...
Finished stage: (init-network) 0.339024 seconds
Starting stage: (modules-config)
...
Finished stage: (modules-config) 0.NNN seconds
Starting stage: (modules-final)
...
Finished stage: (modules-final) 0.NNN seconds
"""
(infh, outfh) = configure_io(args)
for idx, record in enumerate(show.show_events(_get_events(infh),
args.print_format)):
outfh.write('-- Boot Record %02d --\n' % (idx + 1))
outfh.write('The total time elapsed since completing an event is'
' printed after the "@" character.\n')
outfh.write('The time the event takes is printed after the "+" '
'character.\n\n')
outfh.write('\n'.join(record) + '\n')
outfh.write('%d boot records analyzed\n' % (idx + 1))
def analyze_dump(name, args):
"""Dump cloud-init events in json format"""
(infh, outfh) = configure_io(args)
outfh.write(dump.json_dumps(_get_events(infh)) + '\n')
def _get_events(infile):
rawdata = None
events, rawdata = show.load_events(infile, None)
if not events:
events, _ = dump.dump_events(rawdata=rawdata)
return events
def configure_io(args):
"""Common parsing and setup of input/output files"""
if args.infile == '-':
infh = sys.stdin
else:
try:
infh = open(args.infile, 'r')
except (FileNotFoundError, PermissionError):
sys.stderr.write('Cannot open file %s\n' % args.infile)
sys.exit(1)
if args.outfile == '-':
outfh = sys.stdout
else:
try:
outfh = open(args.outfile, 'w')
except PermissionError:
sys.stderr.write('Cannot open file %s\n' % args.outfile)
sys.exit(1)
return (infh, outfh)
if __name__ == '__main__':
parser = get_parser()
args = parser.parse_args()
(name, action_functor) = args.action
action_functor(name, args)
# vi: ts=4 expandtab
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