b530de2ad5
swift-ring-builder uses outdated unbounded class method to handle not supported command. It worked for python 2.6 or older but not for python 2.7 or newer. This patch fixes the problem. Change-Id: I7dbc681ef6be44f6d79ff93189ccca13c51eab74 Fixes: bug #1154882
703 lines
28 KiB
Python
Executable File
703 lines
28 KiB
Python
Executable File
#! /usr/bin/env python
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# Copyright (c) 2010-2012 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import cPickle as pickle
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from array import array
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from errno import EEXIST
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from itertools import islice, izip
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from math import ceil
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from os import mkdir
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from os.path import basename, abspath, dirname, exists, join as pathjoin
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from sys import argv, exit, stderr
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from textwrap import wrap
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from time import time
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from swift.common import exceptions
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from swift.common.ring import RingBuilder
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from swift.common.utils import lock_parent_directory
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MAJOR_VERSION = 1
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MINOR_VERSION = 3
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EXIT_SUCCESS = 0
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EXIT_WARNING = 1
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EXIT_ERROR = 2
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def format_device(dev):
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"""
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Format a device for display.
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"""
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if ':' in dev['ip']:
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return ('d%(id)sr%(region)sz%(zone)s-'
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'[%(ip)s]:%(port)s/%(device)s_"%(meta)s"') % dev
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else:
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return ('d%(id)sr%(region)sz%(zone)s-'
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'%(ip)s:%(port)s/%(device)s_"%(meta)s"') % dev
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class Commands:
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def unknown():
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print 'Unknown command: %s' % argv[2]
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exit(EXIT_ERROR)
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def create():
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"""
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swift-ring-builder <builder_file> create <part_power> <replicas>
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<min_part_hours>
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Creates <builder_file> with 2^<part_power> partitions and <replicas>.
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<min_part_hours> is number of hours to restrict moving a partition more
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than once.
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"""
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if len(argv) < 6:
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print Commands.create.__doc__.strip()
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exit(EXIT_ERROR)
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builder = RingBuilder(int(argv[3]), float(argv[4]), int(argv[5]))
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backup_dir = pathjoin(dirname(argv[1]), 'backups')
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try:
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mkdir(backup_dir)
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except OSError, err:
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if err.errno != EEXIST:
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raise
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pickle.dump(builder.to_dict(), open(pathjoin(backup_dir,
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'%d.' % time() + basename(argv[1])), 'wb'), protocol=2)
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pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
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exit(EXIT_SUCCESS)
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def default():
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"""
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swift-ring-builder <builder_file>
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Shows information about the ring and the devices within.
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"""
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print '%s, build version %d' % (argv[1], builder.version)
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regions = 0
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zones = 0
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balance = 0
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dev_count = 0
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if builder.devs:
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regions = len(set(d['region'] for d in builder.devs
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if d is not None))
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zones = len(set((d['region'], d['zone']) for d in builder.devs
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if d is not None))
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dev_count = len([d for d in builder.devs
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if d is not None])
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balance = builder.get_balance()
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print '%d partitions, %.6f replicas, %d regions, %d zones, ' \
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'%d devices, %.02f balance' % (builder.parts, builder.replicas,
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regions, zones, dev_count,
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balance)
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print 'The minimum number of hours before a partition can be ' \
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'reassigned is %s' % builder.min_part_hours
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if builder.devs:
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print 'Devices: id region zone ip address port' \
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' name weight partitions balance meta'
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weighted_parts = builder.parts * builder.replicas / \
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sum(d['weight'] for d in builder.devs if d is not None)
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for dev in builder.devs:
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if dev is None:
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continue
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if not dev['weight']:
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if dev['parts']:
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balance = 999.99
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else:
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balance = 0
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else:
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balance = 100.0 * dev['parts'] / \
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(dev['weight'] * weighted_parts) - 100.0
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print(' %5d %5d %5d %15s %5d %9s %6.02f %10s'
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'%7.02f %s' %
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(dev['id'], dev['region'], dev['zone'], dev['ip'],
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dev['port'], dev['device'], dev['weight'], dev['parts'],
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balance, dev['meta']))
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exit(EXIT_SUCCESS)
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def search():
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"""
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swift-ring-builder <builder_file> search <search-value>
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Shows information about matching devices.
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"""
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if len(argv) < 4:
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print Commands.search.__doc__.strip()
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print
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print builder.search_devs.__doc__.strip()
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exit(EXIT_ERROR)
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devs = builder.search_devs(argv[3])
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if not devs:
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print 'No matching devices found'
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exit(EXIT_ERROR)
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print 'Devices: id region zone ip address port name ' \
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'weight partitions balance meta'
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weighted_parts = builder.parts * builder.replicas / \
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sum(d['weight'] for d in builder.devs if d is not None)
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for dev in devs:
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if not dev['weight']:
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if dev['parts']:
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balance = 999.99
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else:
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balance = 0
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else:
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balance = 100.0 * dev['parts'] / \
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(dev['weight'] * weighted_parts) - 100.0
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print(' %5d %5d %5d %15s %5d %9s %6.02f %10s %7.02f %s' %
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(dev['id'], dev['region'], dev['zone'], dev['ip'],
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dev['port'], dev['device'], dev['weight'], dev['parts'],
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balance, dev['meta']))
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exit(EXIT_SUCCESS)
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def list_parts():
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"""
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swift-ring-builder <builder_file> list_parts <search-value> [<search-value>] ..
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Returns a 2 column list of all the partitions that are assigned to any of
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the devices matching the search values given. The first column is the
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assigned partition number and the second column is the number of device
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matches for that partition. The list is ordered from most number of matches
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to least. If there are a lot of devices to match against, this command
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could take a while to run.
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"""
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if len(argv) < 4:
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print Commands.list_parts.__doc__.strip()
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print
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print builder.search_devs.__doc__.strip()
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exit(EXIT_ERROR)
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devs = []
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for arg in argv[3:]:
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devs.extend(builder.search_devs(arg) or [])
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if not devs:
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print 'No matching devices found'
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exit(EXIT_ERROR)
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devs = [d['id'] for d in devs]
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max_replicas = int(ceil(builder.replicas))
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matches = [array('i') for x in xrange(max_replicas)]
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for part in xrange(builder.parts):
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count = len([d for d in builder.get_part_devices(part)
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if d['id'] in devs])
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if count:
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matches[max_replicas - count].append(part)
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print 'Partition Matches'
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for index, parts in enumerate(matches):
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for part in parts:
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print '%9d %7d' % (part, max_replicas - index)
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exit(EXIT_SUCCESS)
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def add():
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"""
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swift-ring-builder <builder_file> add
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[r<region>]z<zone>-<ip>:<port>/<device_name>_<meta> <weight>
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[[r<region>]z<zone>-<ip>:<port>/<device_name>_<meta> <weight>] ...
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Adds devices to the ring with the given information. No partitions will be
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assigned to the new device until after running 'rebalance'. This is so you
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can make multiple device changes and rebalance them all just once.
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"""
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if len(argv) < 5 or len(argv) % 2 != 1:
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print Commands.add.__doc__.strip()
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exit(EXIT_ERROR)
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devs_and_weights = izip(islice(argv, 3, len(argv), 2),
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islice(argv, 4, len(argv), 2))
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for devstr, weightstr in devs_and_weights:
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region = 1
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rest = devstr
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if devstr.startswith('r'):
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i = 1
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while i < len(devstr) and devstr[i].isdigit():
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i += 1
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region = int(devstr[1:i])
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rest = devstr[i:]
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else:
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stderr.write("WARNING: No region specified for %s. "
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"Defaulting to region 1.\n" % devstr)
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if not rest.startswith('z'):
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print 'Invalid add value: %s' % devstr
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exit(EXIT_ERROR)
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i = 1
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while i < len(rest) and rest[i].isdigit():
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i += 1
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zone = int(rest[1:i])
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rest = rest[i:]
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if not rest.startswith('-'):
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print 'Invalid add value: %s' % devstr
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print "The on-disk ring builder is unchanged.\n"
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exit(EXIT_ERROR)
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i = 1
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if rest[i] == '[':
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i += 1
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while i < len(rest) and rest[i] != ']':
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i += 1
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i += 1
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ip = rest[1:i].lstrip('[').rstrip(']')
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rest = rest[i:]
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else:
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while i < len(rest) and rest[i] in '0123456789.':
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i += 1
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ip = rest[1:i]
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rest = rest[i:]
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if not rest.startswith(':'):
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print 'Invalid add value: %s' % devstr
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print "The on-disk ring builder is unchanged.\n"
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exit(EXIT_ERROR)
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i = 1
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while i < len(rest) and rest[i].isdigit():
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i += 1
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port = int(rest[1:i])
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rest = rest[i:]
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if not rest.startswith('/'):
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print 'Invalid add value: %s' % devstr
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print "The on-disk ring builder is unchanged.\n"
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exit(EXIT_ERROR)
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i = 1
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while i < len(rest) and rest[i] != '_':
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i += 1
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device_name = rest[1:i]
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rest = rest[i:]
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meta = ''
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if rest.startswith('_'):
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meta = rest[1:]
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try:
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weight = float(weightstr)
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except ValueError:
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print 'Invalid weight value: %s' % weightstr
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print "The on-disk ring builder is unchanged.\n"
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exit(EXIT_ERROR)
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if weight < 0:
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print 'Invalid weight value (must be positive): %s' % weightstr
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print "The on-disk ring builder is unchanged.\n"
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exit(EXIT_ERROR)
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for dev in builder.devs:
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if dev is None:
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continue
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if dev['ip'] == ip and dev['port'] == port and \
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dev['device'] == device_name:
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print 'Device %d already uses %s:%d/%s.' % \
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(dev['id'], dev['ip'], dev['port'], dev['device'])
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print "The on-disk ring builder is unchanged.\n"
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exit(EXIT_ERROR)
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builder.add_dev({'region': region, 'zone': zone, 'ip': ip,
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'port': port, 'device': device_name,
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'weight': weight, 'meta': meta})
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new_dev = builder.search_devs(
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'r%dz%d-%s:%s/%s' %
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(region, zone, ip, port, device_name))[0]['id']
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if ':' in ip:
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print(
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'Device r%dz%d-[%s]:%s/%s_"%s" with %s weight got id %s' %
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(region, zone, ip, port,
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device_name, meta, weight, new_dev))
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else:
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print('Device r%dz%d-%s:%s/%s_"%s" with %s weight got id %s' %
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(region, zone, ip, port,
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device_name, meta, weight, new_dev))
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pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
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exit(EXIT_SUCCESS)
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def set_weight():
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"""
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swift-ring-builder <builder_file> set_weight <search-value> <weight>
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[<search-value> <weight] ...
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Resets the devices' weights. No partitions will be reassigned to or from
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the device until after running 'rebalance'. This is so you can make
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multiple device changes and rebalance them all just once.
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"""
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if len(argv) < 5 or len(argv) % 2 != 1:
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print Commands.set_weight.__doc__.strip()
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print
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print builder.search_devs.__doc__.strip()
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exit(EXIT_ERROR)
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devs_and_weights = izip(islice(argv, 3, len(argv), 2),
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islice(argv, 4, len(argv), 2))
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for devstr, weightstr in devs_and_weights:
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devs = builder.search_devs(devstr)
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weight = float(weightstr)
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if not devs:
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print("Search value \"%s\" matched 0 devices.\n"
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"The on-disk ring builder is unchanged.\n"
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% devstr)
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exit(EXIT_ERROR)
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if len(devs) > 1:
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print 'Matched more than one device:'
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for dev in devs:
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print ' d%(id)sz%(zone)s-%(ip)s:%(port)s/%(device)s_' \
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'"%(meta)s"' % dev
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if raw_input('Are you sure you want to update the weight for '
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'these %s devices? (y/N) ' % len(devs)) != 'y':
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print 'Aborting device modifications'
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exit(EXIT_ERROR)
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for dev in devs:
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builder.set_dev_weight(dev['id'], weight)
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print 'd%(id)sz%(zone)s-%(ip)s:%(port)s/%(device)s_' \
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'"%(meta)s" weight set to %(weight)s' % dev
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pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
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exit(EXIT_SUCCESS)
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def set_info():
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"""
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swift-ring-builder <builder_file> set_info
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<search-value> <ip>:<port>/<device_name>_<meta>
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[<search-value> <ip>:<port>/<device_name>_<meta>] ...
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For each search-value, resets the matched device's information.
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This information isn't used to assign partitions, so you can use
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'write_ring' afterward to rewrite the current ring with the newer
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device information. Any of the parts are optional in the final
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<ip>:<port>/<device_name>_<meta> parameter; just give what you
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want to change. For instance set_info d74 _"snet: 5.6.7.8" would
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just update the meta data for device id 74.
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"""
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if len(argv) < 5 or len(argv) % 2 != 1:
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print Commands.set_info.__doc__.strip()
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print
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print builder.search_devs.__doc__.strip()
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exit(EXIT_ERROR)
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searches_and_changes = izip(islice(argv, 3, len(argv), 2),
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islice(argv, 4, len(argv), 2))
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for search_value, change_value in searches_and_changes:
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devs = builder.search_devs(search_value)
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change = []
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if len(change_value) and change_value[0].isdigit():
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i = 1
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while (i < len(change_value) and
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change_value[i] in '0123456789.'):
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i += 1
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change.append(('ip', change_value[:i]))
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change_value = change_value[i:]
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elif len(change_value) and change_value[0] == '[':
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i = 1
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while i < len(change_value) and change_value[i] != ']':
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i += 1
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i += 1
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change.append(('ip', change_value[:i].lstrip('[').rstrip(']')))
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change_value = change_value[i:]
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if change_value.startswith(':'):
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i = 1
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while i < len(change_value) and change_value[i].isdigit():
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i += 1
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change.append(('port', int(change_value[1:i])))
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change_value = change_value[i:]
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if change_value.startswith('/'):
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i = 1
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while i < len(change_value) and change_value[i] != '_':
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i += 1
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change.append(('device', change_value[1:i]))
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change_value = change_value[i:]
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if change_value.startswith('_'):
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change.append(('meta', change_value[1:]))
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change_value = ''
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if change_value or not change:
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raise ValueError('Invalid set info change value: %s' %
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repr(argv[4]))
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if not devs:
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print("Search value \"%s\" matched 0 devices.\n"
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"The on-disk ring builder is unchanged.\n"
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% search_value)
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exit(EXIT_ERROR)
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if len(devs) > 1:
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print 'Matched more than one device:'
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for dev in devs:
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print ' %s' % format_device(dev)
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if raw_input('Are you sure you want to update the info for '
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'these %s devices? (y/N) ' % len(devs)) != 'y':
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print 'Aborting device modifications'
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exit(EXIT_ERROR)
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for dev in devs:
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orig_dev_string = format_device(dev)
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test_dev = dict(dev)
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for key, value in change:
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test_dev[key] = value
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for check_dev in builder.devs:
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if not check_dev or check_dev['id'] == test_dev['id']:
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continue
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if check_dev['ip'] == test_dev['ip'] and \
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check_dev['port'] == test_dev['port'] and \
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check_dev['device'] == test_dev['device']:
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print 'Device %d already uses %s:%d/%s.' % \
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(check_dev['id'], check_dev['ip'],
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check_dev['port'], check_dev['device'])
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exit(EXIT_ERROR)
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for key, value in change:
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dev[key] = value
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print 'Device %s is now %s' % (orig_dev_string,
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format_device(dev))
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pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
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exit(EXIT_SUCCESS)
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def remove():
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"""
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swift-ring-builder <builder_file> remove <search-value> [search-value ...]
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Removes the device(s) from the ring. This should normally just be used for
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a device that has failed. For a device you wish to decommission, it's best
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to set its weight to 0, wait for it to drain all its data, then use this
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remove command. This will not take effect until after running 'rebalance'.
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This is so you can make multiple device changes and rebalance them all just
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once.
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"""
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if len(argv) < 4:
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print Commands.remove.__doc__.strip()
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print
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print builder.search_devs.__doc__.strip()
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exit(EXIT_ERROR)
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for search_value in argv[3:]:
|
|
devs = builder.search_devs(search_value)
|
|
if not devs:
|
|
print("Search value \"%s\" matched 0 devices.\n"
|
|
"The on-disk ring builder is unchanged." % search_value)
|
|
exit(EXIT_ERROR)
|
|
if len(devs) > 1:
|
|
print 'Matched more than one device:'
|
|
for dev in devs:
|
|
print ' d%(id)sr%(region)sz%(zone)s-%(ip)s:%(port)s/' \
|
|
'%(device)s_"%(meta)s"' % dev
|
|
if raw_input('Are you sure you want to remove these %s '
|
|
'devices? (y/N) ' % len(devs)) != 'y':
|
|
print 'Aborting device removals'
|
|
exit(EXIT_ERROR)
|
|
for dev in devs:
|
|
try:
|
|
builder.remove_dev(dev['id'])
|
|
except exceptions.RingBuilderError, e:
|
|
print '-' * 79
|
|
print(
|
|
"An error occurred while removing device with id %d\n"
|
|
"This usually means that you attempted to remove\n"
|
|
"the last device in a ring. If this is the case,\n"
|
|
"consider creating a new ring instead.\n"
|
|
"The on-disk ring builder is unchanged.\n"
|
|
"Original exception message: %s" %
|
|
(dev['id'], e.message)
|
|
)
|
|
print '-' * 79
|
|
exit(EXIT_ERROR)
|
|
|
|
print 'd%(id)sr%(region)sz%(zone)s-%(ip)s:%(port)s/' \
|
|
'%(device)s_"%(meta)s" marked for removal and will ' \
|
|
'be removed next rebalance.' % dev
|
|
pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def rebalance():
|
|
"""
|
|
swift-ring-builder <builder_file> rebalance <seed>
|
|
Attempts to rebalance the ring by reassigning partitions that haven't been
|
|
recently reassigned.
|
|
"""
|
|
def get_seed(index):
|
|
try:
|
|
return argv[index]
|
|
except IndexError:
|
|
pass
|
|
|
|
devs_changed = builder.devs_changed
|
|
try:
|
|
last_balance = builder.get_balance()
|
|
parts, balance = builder.rebalance(seed=get_seed(3))
|
|
except exceptions.RingBuilderError, e:
|
|
print '-' * 79
|
|
print ("An error has occurred during ring validation. Common\n"
|
|
"causes of failure are rings that are empty or do not\n"
|
|
"have enough devices to accommodate the replica count.\n"
|
|
"Original exception message:\n %s" % e.message
|
|
)
|
|
print '-' * 79
|
|
exit(EXIT_ERROR)
|
|
if not parts:
|
|
print 'No partitions could be reassigned.'
|
|
print 'Either none need to be or none can be due to ' \
|
|
'min_part_hours [%s].' % builder.min_part_hours
|
|
exit(EXIT_WARNING)
|
|
if not devs_changed and abs(last_balance - balance) < 1:
|
|
print 'Cowardly refusing to save rebalance as it did not change ' \
|
|
'at least 1%.'
|
|
exit(EXIT_WARNING)
|
|
try:
|
|
builder.validate()
|
|
except exceptions.RingValidationError, e:
|
|
print '-' * 79
|
|
print ("An error has occurred during ring validation. Common\n"
|
|
"causes of failure are rings that are empty or do not\n"
|
|
"have enough devices to accommodate the replica count.\n"
|
|
"Original exception message:\n %s" % e.message
|
|
)
|
|
print '-' * 79
|
|
exit(EXIT_ERROR)
|
|
print 'Reassigned %d (%.02f%%) partitions. Balance is now %.02f.' % \
|
|
(parts, 100.0 * parts / builder.parts, balance)
|
|
status = EXIT_SUCCESS
|
|
if balance > 5:
|
|
print '-' * 79
|
|
print 'NOTE: Balance of %.02f indicates you should push this ' % \
|
|
balance
|
|
print ' ring, wait at least %d hours, and rebalance/repush.' \
|
|
% builder.min_part_hours
|
|
print '-' * 79
|
|
status = EXIT_WARNING
|
|
ts = time()
|
|
builder.get_ring().save(
|
|
pathjoin(backup_dir, '%d.' % ts + basename(ring_file)))
|
|
pickle.dump(builder.to_dict(), open(pathjoin(backup_dir,
|
|
'%d.' % ts + basename(argv[1])), 'wb'), protocol=2)
|
|
builder.get_ring().save(ring_file)
|
|
pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
|
|
exit(status)
|
|
|
|
def validate():
|
|
"""
|
|
swift-ring-builder <builder_file> validate
|
|
Just runs the validation routines on the ring.
|
|
"""
|
|
builder.validate()
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def write_ring():
|
|
"""
|
|
swift-ring-builder <builder_file> write_ring
|
|
Just rewrites the distributable ring file. This is done automatically after
|
|
a successful rebalance, so really this is only useful after one or more
|
|
'set_info' calls when no rebalance is needed but you want to send out the
|
|
new device information.
|
|
"""
|
|
ring_data = builder.get_ring()
|
|
if not ring_data._replica2part2dev_id:
|
|
if ring_data.devs:
|
|
print 'Warning: Writing a ring with no partition ' \
|
|
'assignments but with devices; did you forget to run ' \
|
|
'"rebalance"?'
|
|
else:
|
|
print 'Warning: Writing an empty ring'
|
|
ring_data.save(
|
|
pathjoin(backup_dir, '%d.' % time() + basename(ring_file)))
|
|
ring_data.save(ring_file)
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def pretend_min_part_hours_passed():
|
|
builder.pretend_min_part_hours_passed()
|
|
pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def set_min_part_hours():
|
|
"""
|
|
swift-ring-builder <builder_file> set_min_part_hours <hours>
|
|
Changes the <min_part_hours> to the given <hours>. This should be set to
|
|
however long a full replication/update cycle takes. We're working on a way
|
|
to determine this more easily than scanning logs.
|
|
"""
|
|
if len(argv) < 4:
|
|
print Commands.set_min_part_hours.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
builder.change_min_part_hours(int(argv[3]))
|
|
print 'The minimum number of hours before a partition can be ' \
|
|
'reassigned is now set to %s' % argv[3]
|
|
pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def set_replicas():
|
|
"""
|
|
swift-ring-builder <builder_file> set_replicas <replicas>
|
|
Changes the replica count to the given <replicas>. <replicas> may
|
|
be a floating-point value, in which case some partitions will have
|
|
floor(<replicas>) replicas and some will have ceiling(<replicas>)
|
|
in the correct proportions.
|
|
|
|
A rebalance is needed to make the change take effect.
|
|
"""
|
|
if len(argv) < 4:
|
|
print Commands.set_replicas.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
|
|
new_replicas = argv[3]
|
|
try:
|
|
new_replicas = float(new_replicas)
|
|
except ValueError:
|
|
print Commands.set_replicas.__doc__.strip()
|
|
print "\"%s\" is not a valid number." % new_replicas
|
|
exit(EXIT_ERROR)
|
|
|
|
if new_replicas < 1:
|
|
print "Replica count must be at least 1."
|
|
exit(EXIT_ERROR)
|
|
|
|
builder.set_replicas(new_replicas)
|
|
print 'The replica count is now %.6f.' % builder.replicas
|
|
print 'The change will take effect after the next rebalance.'
|
|
pickle.dump(builder.to_dict(), open(argv[1], 'wb'), protocol=2)
|
|
exit(EXIT_SUCCESS)
|
|
|
|
if __name__ == '__main__':
|
|
if len(argv) < 2:
|
|
print "swift-ring-builder %(MAJOR_VERSION)s.%(MINOR_VERSION)s\n" % \
|
|
globals()
|
|
print Commands.default.__doc__.strip()
|
|
print
|
|
cmds = [c for c, f in Commands.__dict__.iteritems()
|
|
if f.__doc__ and c[0] != '_' and c != 'default']
|
|
cmds.sort()
|
|
for cmd in cmds:
|
|
print Commands.__dict__[cmd].__doc__.strip()
|
|
print
|
|
print RingBuilder.search_devs.__doc__.strip()
|
|
print
|
|
for line in wrap(' '.join(cmds), 79, initial_indent='Quick list: ',
|
|
subsequent_indent=' '):
|
|
print line
|
|
print ('Exit codes: 0 = operation successful\n'
|
|
' 1 = operation completed with warnings\n'
|
|
' 2 = error')
|
|
exit(EXIT_SUCCESS)
|
|
|
|
if exists(argv[1]):
|
|
builder = RingBuilder.load(argv[1])
|
|
elif len(argv) < 3 or argv[2] != 'create':
|
|
print 'Ring Builder file does not exist: %s' % argv[1]
|
|
exit(EXIT_ERROR)
|
|
|
|
backup_dir = pathjoin(dirname(argv[1]), 'backups')
|
|
try:
|
|
mkdir(backup_dir)
|
|
except OSError, err:
|
|
if err.errno != EEXIST:
|
|
raise
|
|
|
|
ring_file = argv[1]
|
|
if ring_file.endswith('.builder'):
|
|
ring_file = ring_file[:-len('.builder')]
|
|
ring_file += '.ring.gz'
|
|
|
|
if len(argv) == 2:
|
|
command = "default"
|
|
else:
|
|
command = argv[2]
|
|
if argv[0].endswith('-safe'):
|
|
try:
|
|
with lock_parent_directory(abspath(argv[1]), 15):
|
|
Commands.__dict__.get(command, Commands.unknown.im_func)()
|
|
except exceptions.LockTimeout:
|
|
print "Ring/builder dir currently locked."
|
|
exit(2)
|
|
else:
|
|
Commands.__dict__.get(command, Commands.unknown.im_func)()
|