3957dbc5d4
When added a new devices into builder the add_dev function returns it unique id. blueprint argparse-in-swift-ring-builder Change-Id: I57080bb625e812f6cea71199df907a44b332b552
758 lines
30 KiB
Python
Executable File
758 lines
30 KiB
Python
Executable File
#! /usr/bin/env python
|
|
# Copyright (c) 2010-2012 OpenStack, LLC.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
# implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from array import array
|
|
from errno import EEXIST
|
|
from itertools import islice, izip
|
|
from math import ceil
|
|
from os import mkdir
|
|
from os.path import basename, abspath, dirname, exists, join as pathjoin
|
|
from sys import argv, exit, stderr
|
|
from textwrap import wrap
|
|
from time import time
|
|
|
|
from swift.common import exceptions
|
|
from swift.common.ring import RingBuilder
|
|
from swift.common.ring.builder import MAX_BALANCE
|
|
from swift.common.utils import lock_parent_directory
|
|
from swift.common.ring.utils import parse_search_value
|
|
|
|
MAJOR_VERSION = 1
|
|
MINOR_VERSION = 3
|
|
EXIT_SUCCESS = 0
|
|
EXIT_WARNING = 1
|
|
EXIT_ERROR = 2
|
|
|
|
|
|
def format_device(dev):
|
|
"""
|
|
Format a device for display.
|
|
"""
|
|
copy_dev = dev.copy()
|
|
for key in ('ip', 'replication_ip'):
|
|
if ':' in copy_dev[key]:
|
|
copy_dev[key] = '[' + copy_dev[key] + ']'
|
|
return ('d%(id)sr%(region)sz%(zone)s-%(ip)s:%(port)sR'
|
|
'%(replication_ip)s:%(replication_port)s/%(device)s_'
|
|
'"%(meta)s"' % copy_dev)
|
|
|
|
|
|
class Commands:
|
|
|
|
def unknown():
|
|
print 'Unknown command: %s' % argv[2]
|
|
exit(EXIT_ERROR)
|
|
|
|
def create():
|
|
"""
|
|
swift-ring-builder <builder_file> create <part_power> <replicas>
|
|
<min_part_hours>
|
|
Creates <builder_file> with 2^<part_power> partitions and <replicas>.
|
|
<min_part_hours> is number of hours to restrict moving a partition more
|
|
than once.
|
|
"""
|
|
if len(argv) < 6:
|
|
print Commands.create.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
builder = RingBuilder(int(argv[3]), float(argv[4]), int(argv[5]))
|
|
backup_dir = pathjoin(dirname(argv[1]), 'backups')
|
|
try:
|
|
mkdir(backup_dir)
|
|
except OSError, err:
|
|
if err.errno != EEXIST:
|
|
raise
|
|
builder.save(pathjoin(backup_dir, '%d.' % time() + basename(argv[1])))
|
|
builder.save(argv[1])
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def default():
|
|
"""
|
|
swift-ring-builder <builder_file>
|
|
Shows information about the ring and the devices within.
|
|
"""
|
|
print '%s, build version %d' % (argv[1], builder.version)
|
|
regions = 0
|
|
zones = 0
|
|
balance = 0
|
|
dev_count = 0
|
|
if builder.devs:
|
|
regions = len(set(d['region'] for d in builder.devs
|
|
if d is not None))
|
|
zones = len(set((d['region'], d['zone']) for d in builder.devs
|
|
if d is not None))
|
|
dev_count = len([dev for dev in builder.devs
|
|
if dev is not None])
|
|
balance = builder.get_balance()
|
|
print '%d partitions, %.6f replicas, %d regions, %d zones, ' \
|
|
'%d devices, %.02f balance' % (builder.parts, builder.replicas,
|
|
regions, zones, dev_count,
|
|
balance)
|
|
print 'The minimum number of hours before a partition can be ' \
|
|
'reassigned is %s' % builder.min_part_hours
|
|
if builder.devs:
|
|
print 'Devices: id region zone ip address port ' \
|
|
'replication ip replication port name ' \
|
|
'weight partitions balance meta'
|
|
weighted_parts = builder.parts * builder.replicas / \
|
|
sum(d['weight'] for d in builder.devs if d is not None)
|
|
for dev in builder.devs:
|
|
if dev is None:
|
|
continue
|
|
if not dev['weight']:
|
|
if dev['parts']:
|
|
balance = MAX_BALANCE
|
|
else:
|
|
balance = 0
|
|
else:
|
|
balance = 100.0 * dev['parts'] / \
|
|
(dev['weight'] * weighted_parts) - 100.0
|
|
print(' %5d %7d %5d %15s %5d %15s %17d %9s %6.02f '
|
|
'%10s %7.02f %s' %
|
|
(dev['id'], dev['region'], dev['zone'], dev['ip'],
|
|
dev['port'], dev['replication_ip'],
|
|
dev['replication_port'], dev['device'], dev['weight'],
|
|
dev['parts'], balance, dev['meta']))
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def search():
|
|
"""
|
|
swift-ring-builder <builder_file> search <search-value>
|
|
Shows information about matching devices.
|
|
"""
|
|
if len(argv) < 4:
|
|
print Commands.search.__doc__.strip()
|
|
print
|
|
print parse_search_value.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
devs = builder.search_devs(parse_search_value(argv[3]))
|
|
if not devs:
|
|
print 'No matching devices found'
|
|
exit(EXIT_ERROR)
|
|
print 'Devices: id region zone ip address port ' \
|
|
'replication ip replication port name weight partitions ' \
|
|
'balance meta'
|
|
weighted_parts = builder.parts * builder.replicas / \
|
|
sum(d['weight'] for d in builder.devs if d is not None)
|
|
for dev in devs:
|
|
if not dev['weight']:
|
|
if dev['parts']:
|
|
balance = MAX_BALANCE
|
|
else:
|
|
balance = 0
|
|
else:
|
|
balance = 100.0 * dev['parts'] / \
|
|
(dev['weight'] * weighted_parts) - 100.0
|
|
print(' %5d %7d %5d %15s %5d %15s %17d %9s %6.02f %10s '
|
|
'%7.02f %s' %
|
|
(dev['id'], dev['region'], dev['zone'], dev['ip'],
|
|
dev['port'], dev['replication_ip'], dev['replication_port'],
|
|
dev['device'], dev['weight'], dev['parts'], balance,
|
|
dev['meta']))
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def list_parts():
|
|
"""
|
|
swift-ring-builder <builder_file> list_parts <search-value> [<search-value>] ..
|
|
Returns a 2 column list of all the partitions that are assigned to any of
|
|
the devices matching the search values given. The first column is the
|
|
assigned partition number and the second column is the number of device
|
|
matches for that partition. The list is ordered from most number of matches
|
|
to least. If there are a lot of devices to match against, this command
|
|
could take a while to run.
|
|
"""
|
|
if len(argv) < 4:
|
|
print Commands.list_parts.__doc__.strip()
|
|
print
|
|
print parse_search_value.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
devs = []
|
|
for arg in argv[3:]:
|
|
devs.extend(builder.search_devs(parse_search_value(arg)) or [])
|
|
if not devs:
|
|
print 'No matching devices found'
|
|
exit(EXIT_ERROR)
|
|
devs = [d['id'] for d in devs]
|
|
max_replicas = int(ceil(builder.replicas))
|
|
matches = [array('i') for x in xrange(max_replicas)]
|
|
for part in xrange(builder.parts):
|
|
count = len([d for d in builder.get_part_devices(part)
|
|
if d['id'] in devs])
|
|
if count:
|
|
matches[max_replicas - count].append(part)
|
|
print 'Partition Matches'
|
|
for index, parts in enumerate(matches):
|
|
for part in parts:
|
|
print '%9d %7d' % (part, max_replicas - index)
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def add():
|
|
"""
|
|
swift-ring-builder <builder_file> add
|
|
[r<region>]z<zone>-<ip>:<port>[R<r_ip>:<r_port>]/<device_name>_<meta>
|
|
<weight>
|
|
[[r<region>]z<zone>-<ip>:<port>[R<r_ip>:<r_port>]/<device_name>_<meta>
|
|
<weight>] ...
|
|
|
|
Where <r_ip> and <r_port> are replication ip and port.
|
|
|
|
Adds devices to the ring with the given information. No partitions will be
|
|
assigned to the new device until after running 'rebalance'. This is so you
|
|
can make multiple device changes and rebalance them all just once.
|
|
"""
|
|
if len(argv) < 5 or len(argv) % 2 != 1:
|
|
print Commands.add.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
|
|
devs_and_weights = izip(islice(argv, 3, len(argv), 2),
|
|
islice(argv, 4, len(argv), 2))
|
|
for devstr, weightstr in devs_and_weights:
|
|
region = 1
|
|
rest = devstr
|
|
if devstr.startswith('r'):
|
|
i = 1
|
|
while i < len(devstr) and devstr[i].isdigit():
|
|
i += 1
|
|
region = int(devstr[1:i])
|
|
rest = devstr[i:]
|
|
else:
|
|
stderr.write("WARNING: No region specified for %s. "
|
|
"Defaulting to region 1.\n" % devstr)
|
|
|
|
if not rest.startswith('z'):
|
|
print 'Invalid add value: %s' % devstr
|
|
exit(EXIT_ERROR)
|
|
i = 1
|
|
while i < len(rest) and rest[i].isdigit():
|
|
i += 1
|
|
zone = int(rest[1:i])
|
|
rest = rest[i:]
|
|
|
|
if not rest.startswith('-'):
|
|
print 'Invalid add value: %s' % devstr
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
i = 1
|
|
if rest[i] == '[':
|
|
i += 1
|
|
while i < len(rest) and rest[i] != ']':
|
|
i += 1
|
|
i += 1
|
|
ip = rest[1:i].lstrip('[').rstrip(']')
|
|
rest = rest[i:]
|
|
else:
|
|
while i < len(rest) and rest[i] in '0123456789.':
|
|
i += 1
|
|
ip = rest[1:i]
|
|
rest = rest[i:]
|
|
|
|
if not rest.startswith(':'):
|
|
print 'Invalid add value: %s' % devstr
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
i = 1
|
|
while i < len(rest) and rest[i].isdigit():
|
|
i += 1
|
|
port = int(rest[1:i])
|
|
rest = rest[i:]
|
|
|
|
replication_ip = ip
|
|
replication_port = port
|
|
if rest.startswith('R'):
|
|
i = 1
|
|
if rest[i] == '[':
|
|
i += 1
|
|
while i < len(rest) and rest[i] != ']':
|
|
i += 1
|
|
i += 1
|
|
replication_ip = rest[1:i].lstrip('[').rstrip(']')
|
|
rest = rest[i:]
|
|
else:
|
|
while i < len(rest) and rest[i] in '0123456789.':
|
|
i += 1
|
|
replication_ip = rest[1:i]
|
|
rest = rest[i:]
|
|
|
|
if not rest.startswith(':'):
|
|
print 'Invalid add value: %s' % devstr
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
i = 1
|
|
while i < len(rest) and rest[i].isdigit():
|
|
i += 1
|
|
replication_port = int(rest[1:i])
|
|
rest = rest[i:]
|
|
|
|
if not rest.startswith('/'):
|
|
print 'Invalid add value: %s' % devstr
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
i = 1
|
|
while i < len(rest) and rest[i] != '_':
|
|
i += 1
|
|
device_name = rest[1:i]
|
|
rest = rest[i:]
|
|
|
|
meta = ''
|
|
if rest.startswith('_'):
|
|
meta = rest[1:]
|
|
|
|
try:
|
|
weight = float(weightstr)
|
|
except ValueError:
|
|
print 'Invalid weight value: %s' % weightstr
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
|
|
if weight < 0:
|
|
print 'Invalid weight value (must be positive): %s' % weightstr
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
|
|
for dev in builder.devs:
|
|
if dev is None:
|
|
continue
|
|
if dev['ip'] == ip and dev['port'] == port and \
|
|
dev['device'] == device_name:
|
|
print 'Device %d already uses %s:%d/%s.' % \
|
|
(dev['id'], dev['ip'], dev['port'], dev['device'])
|
|
print "The on-disk ring builder is unchanged.\n"
|
|
exit(EXIT_ERROR)
|
|
dev_params = {'region': region, 'zone': zone, 'ip': ip,
|
|
'port': port, 'replication_ip': replication_ip,
|
|
'replication_port': replication_port,
|
|
'device': device_name, 'weight': weight,
|
|
'meta': meta}
|
|
dev_id = builder.add_dev(dev_params)
|
|
print('Device %s with %s weight got id %s' %
|
|
(format_device(dev_params), weight, dev_id))
|
|
builder.save(argv[1])
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def set_weight():
|
|
"""
|
|
swift-ring-builder <builder_file> set_weight <search-value> <weight>
|
|
[<search-value> <weight] ...
|
|
|
|
Resets the devices' weights. No partitions will be reassigned to or from
|
|
the device until after running 'rebalance'. This is so you can make
|
|
multiple device changes and rebalance them all just once.
|
|
"""
|
|
if len(argv) < 5 or len(argv) % 2 != 1:
|
|
print Commands.set_weight.__doc__.strip()
|
|
print
|
|
print parse_search_value.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
|
|
devs_and_weights = izip(islice(argv, 3, len(argv), 2),
|
|
islice(argv, 4, len(argv), 2))
|
|
for devstr, weightstr in devs_and_weights:
|
|
devs = builder.search_devs(parse_search_value(devstr))
|
|
weight = float(weightstr)
|
|
if not devs:
|
|
print("Search value \"%s\" matched 0 devices.\n"
|
|
"The on-disk ring builder is unchanged.\n"
|
|
% devstr)
|
|
exit(EXIT_ERROR)
|
|
if len(devs) > 1:
|
|
print 'Matched more than one device:'
|
|
for dev in devs:
|
|
print ' %s' % format_device(dev)
|
|
if raw_input('Are you sure you want to update the weight for '
|
|
'these %s devices? (y/N) ' % len(devs)) != 'y':
|
|
print 'Aborting device modifications'
|
|
exit(EXIT_ERROR)
|
|
for dev in devs:
|
|
builder.set_dev_weight(dev['id'], weight)
|
|
print '%s weight set to %s' % (format_device(dev),
|
|
dev['weight'])
|
|
builder.save(argv[1])
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def set_info():
|
|
"""
|
|
swift-ring-builder <builder_file> set_info
|
|
<search-value> <ip>:<port>[R<r_ip>:<r_port>]/<device_name>_<meta>
|
|
[<search-value> <ip>:<port>[R<r_ip>:<r_port>]/<device_name>_<meta>] ...
|
|
|
|
Where <r_ip> and <r_port> are replication ip and port.
|
|
|
|
For each search-value, resets the matched device's information.
|
|
This information isn't used to assign partitions, so you can use
|
|
'write_ring' afterward to rewrite the current ring with the newer
|
|
device information. Any of the parts are optional in the final
|
|
<ip>:<port>/<device_name>_<meta> parameter; just give what you
|
|
want to change. For instance set_info d74 _"snet: 5.6.7.8" would
|
|
just update the meta data for device id 74.
|
|
"""
|
|
if len(argv) < 5 or len(argv) % 2 != 1:
|
|
print Commands.set_info.__doc__.strip()
|
|
print
|
|
print parse_search_value.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
|
|
searches_and_changes = izip(islice(argv, 3, len(argv), 2),
|
|
islice(argv, 4, len(argv), 2))
|
|
|
|
for search_value, change_value in searches_and_changes:
|
|
devs = builder.search_devs(parse_search_value(search_value))
|
|
change = []
|
|
if len(change_value) and change_value[0].isdigit():
|
|
i = 1
|
|
while (i < len(change_value) and
|
|
change_value[i] in '0123456789.'):
|
|
i += 1
|
|
change.append(('ip', change_value[:i]))
|
|
change_value = change_value[i:]
|
|
elif len(change_value) and change_value[0] == '[':
|
|
i = 1
|
|
while i < len(change_value) and change_value[i] != ']':
|
|
i += 1
|
|
i += 1
|
|
change.append(('ip', change_value[:i].lstrip('[').rstrip(']')))
|
|
change_value = change_value[i:]
|
|
if change_value.startswith(':'):
|
|
i = 1
|
|
while i < len(change_value) and change_value[i].isdigit():
|
|
i += 1
|
|
change.append(('port', int(change_value[1:i])))
|
|
change_value = change_value[i:]
|
|
if change_value.startswith('R'):
|
|
change_value = change_value[1:]
|
|
if len(change_value) and change_value[0].isdigit():
|
|
i = 1
|
|
while (i < len(change_value) and
|
|
change_value[i] in '0123456789.'):
|
|
i += 1
|
|
change.append(('replication_ip', change_value[:i]))
|
|
change_value = change_value[i:]
|
|
elif len(change_value) and change_value[0] == '[':
|
|
i = 1
|
|
while i < len(change_value) and change_value[i] != ']':
|
|
i += 1
|
|
i += 1
|
|
change.append(('replication_ip',
|
|
change_value[:i].lstrip('[').rstrip(']')))
|
|
change_value = change_value[i:]
|
|
if change_value.startswith(':'):
|
|
i = 1
|
|
while i < len(change_value) and change_value[i].isdigit():
|
|
i += 1
|
|
change.append(('replication_port', int(change_value[1:i])))
|
|
change_value = change_value[i:]
|
|
if change_value.startswith('/'):
|
|
i = 1
|
|
while i < len(change_value) and change_value[i] != '_':
|
|
i += 1
|
|
change.append(('device', change_value[1:i]))
|
|
change_value = change_value[i:]
|
|
if change_value.startswith('_'):
|
|
change.append(('meta', change_value[1:]))
|
|
change_value = ''
|
|
if change_value or not change:
|
|
raise ValueError('Invalid set info change value: %s' %
|
|
repr(argv[4]))
|
|
if not devs:
|
|
print("Search value \"%s\" matched 0 devices.\n"
|
|
"The on-disk ring builder is unchanged.\n"
|
|
% search_value)
|
|
exit(EXIT_ERROR)
|
|
if len(devs) > 1:
|
|
print 'Matched more than one device:'
|
|
for dev in devs:
|
|
print ' %s' % format_device(dev)
|
|
if raw_input('Are you sure you want to update the info for '
|
|
'these %s devices? (y/N) ' % len(devs)) != 'y':
|
|
print 'Aborting device modifications'
|
|
exit(EXIT_ERROR)
|
|
for dev in devs:
|
|
orig_dev_string = format_device(dev)
|
|
test_dev = dict(dev)
|
|
for key, value in change:
|
|
test_dev[key] = value
|
|
for check_dev in builder.devs:
|
|
if not check_dev or check_dev['id'] == test_dev['id']:
|
|
continue
|
|
if check_dev['ip'] == test_dev['ip'] and \
|
|
check_dev['port'] == test_dev['port'] and \
|
|
check_dev['device'] == test_dev['device']:
|
|
print 'Device %d already uses %s:%d/%s.' % \
|
|
(check_dev['id'], check_dev['ip'],
|
|
check_dev['port'], check_dev['device'])
|
|
exit(EXIT_ERROR)
|
|
for key, value in change:
|
|
dev[key] = value
|
|
print 'Device %s is now %s' % (orig_dev_string,
|
|
format_device(dev))
|
|
builder.save(argv[1])
|
|
exit(EXIT_SUCCESS)
|
|
|
|
def remove():
|
|
"""
|
|
swift-ring-builder <builder_file> remove <search-value> [search-value ...]
|
|
Removes the device(s) from the ring. This should normally just be used for
|
|
a device that has failed. For a device you wish to decommission, it's best
|
|
to set its weight to 0, wait for it to drain all its data, then use this
|
|
remove command. This will not take effect until after running 'rebalance'.
|
|
This is so you can make multiple device changes and rebalance them all just
|
|
once.
|
|
"""
|
|
if len(argv) < 4:
|
|
print Commands.remove.__doc__.strip()
|
|
print
|
|
print parse_search_value.__doc__.strip()
|
|
exit(EXIT_ERROR)
|
|
|
|
for search_value in argv[3:]:
|
|
devs = builder.search_devs(parse_search_value(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 ' %s' % format_device(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 '%s marked for removal and will ' \
|
|
'be removed next rebalance.' % format_device(dev)
|
|
builder.save(argv[1])
|
|
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 we set device's weight to zero, currently balance will be set
|
|
# special value(MAX_BALANCE) until zero weighted device return all
|
|
# its partitions. So we cannot check balance has changed.
|
|
# Thus we need to check balance or last_balance is special value.
|
|
if not devs_changed and abs(last_balance - balance) < 1 and \
|
|
not (last_balance == MAX_BALANCE and balance == MAX_BALANCE):
|
|
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)))
|
|
builder.save(pathjoin(backup_dir, '%d.' % ts + basename(argv[1])))
|
|
builder.get_ring().save(ring_file)
|
|
builder.save(argv[1])
|
|
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()
|
|
builder.save(argv[1])
|
|
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]
|
|
builder.save(argv[1])
|
|
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.'
|
|
builder.save(argv[1])
|
|
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 parse_search_value.__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)()
|