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swift /bin /swift-dispersion-report

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#!/usr/bin/python -u
# Copyright (c) 2010-2011 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.
import csv
import os
import socket
from ConfigParser import ConfigParser
from httplib import HTTPException
from optparse import OptionParser
from sys import argv, exit, stderr
from time import time
from uuid import uuid4
from eventlet import GreenPool, hubs, patcher, sleep, Timeout
from eventlet.pools import Pool
from swift.common import direct_client
from swift.common.client import ClientException, Connection, get_auth
from swift.common.ring import Ring
from swift.common.utils import compute_eta, get_time_units
unmounted = []
def get_error_log(prefix):
def error_log(msg_or_exc):
global unmounted
if hasattr(msg_or_exc, 'http_status') and \
msg_or_exc.http_status == 507:
identifier = '%s:%s/%s'
if identifier not in unmounted:
unmounted.append(identifier)
print >>stderr, 'ERROR: %s:%s/%s is unmounted -- This will ' \
'cause replicas designated for that device to be ' \
'considered missing until resolved or the ring is ' \
'updated.' % (msg_or_exc.http_host, msg_or_exc.http_port,
msg_or_exc.http_device)
if not hasattr(msg_or_exc, 'http_status') or \
msg_or_exc.http_status not in (404, 507):
print >>stderr, 'ERROR: %s: %s' % (prefix, msg_or_exc)
return error_log
def container_dispersion_report(coropool, connpool, account, container_ring,
retries):
with connpool.item() as conn:
containers = [c['name'] for c in conn.get_account(prefix='dispersion_',
full_listing=True)[1]]
containers_listed = len(containers)
if not containers_listed:
print >>stderr, 'No containers to query. Has ' \
'swift-dispersion-populate been run?'
return
retries_done = [0]
containers_queried = [0]
container_copies_found = [0, 0, 0, 0]
begun = time()
next_report = [time() + 2]
def direct(container, part, nodes):
found_count = 0
for node in nodes:
error_log = get_error_log('%(ip)s:%(port)s/%(device)s' % node)
try:
attempts, _junk = direct_client.retry(
direct_client.direct_head_container, node,
part, account, container, error_log=error_log,
retries=retries)
retries_done[0] += attempts - 1
found_count += 1
except ClientException, err:
if err.http_status not in (404, 507):
error_log('Giving up on /%s/%s/%s: %s' % (part, account,
container, err))
except (Exception, Timeout), err:
error_log('Giving up on /%s/%s/%s: %s' % (part, account,
container, err))
container_copies_found[found_count] += 1
containers_queried[0] += 1
if time() >= next_report[0]:
next_report[0] = time() + 5
eta, eta_unit = compute_eta(begun, containers_queried[0],
containers_listed)
print '\r\x1B[KQuerying containers: %d of %d, %d%s left, %d ' \
'retries' % (containers_queried[0], containers_listed,
round(eta), eta_unit, retries_done[0]),
container_parts = {}
for container in containers:
part, nodes = container_ring.get_nodes(account, container)
if part not in container_parts:
container_parts[part] = part
coropool.spawn(direct, container, part, nodes)
coropool.waitall()
distinct_partitions = len(container_parts)
copies_expected = distinct_partitions * container_ring.replica_count
copies_found = sum(a * b for a, b in enumerate(container_copies_found))
value = 100.0 * copies_found / copies_expected
elapsed, elapsed_unit = get_time_units(time() - begun)
print '\r\x1B[KQueried %d containers for dispersion reporting, ' \
'%d%s, %d retries' % (containers_listed, round(elapsed),
elapsed_unit, retries_done[0])
if containers_listed - distinct_partitions:
print 'There were %d overlapping partitions' % (
containers_listed - distinct_partitions)
if container_copies_found[2]:
print 'There were %d partitions missing one copy.' % \
container_copies_found[2]
if container_copies_found[1]:
print '! There were %d partitions missing two copies.' % \
container_copies_found[1]
if container_copies_found[0]:
print '!!! There were %d partitions missing all copies.' % \
container_copies_found[0]
print '%.02f%% of container copies found (%d of %d)' % (
value, copies_found, copies_expected)
print 'Sample represents %.02f%% of the container partition space' % (
100.0 * distinct_partitions / container_ring.partition_count)
def object_dispersion_report(coropool, connpool, account, object_ring,
retries):
container = 'dispersion_objects'
with connpool.item() as conn:
try:
objects = [o['name'] for o in conn.get_container(container,
prefix='dispersion_', full_listing=True)[1]]
except ClientException, err:
if err.http_status != 404:
raise
print >>stderr, 'No objects to query. Has ' \
'swift-dispersion-populate been run?'
return
objects_listed = len(objects)
if not objects_listed:
print >>stderr, 'No objects to query. Has swift-dispersion-populate ' \
'been run?'
return
retries_done = [0]
objects_queried = [0]
object_copies_found = [0, 0, 0, 0]
begun = time()
next_report = [time() + 2]
def direct(obj, part, nodes):
found_count = 0
for node in nodes:
error_log = get_error_log('%(ip)s:%(port)s/%(device)s' % node)
try:
attempts, _junk = direct_client.retry(
direct_client.direct_head_object, node, part,
account, container, obj, error_log=error_log,
retries=retries)
retries_done[0] += attempts - 1
found_count += 1
except ClientException, err:
if err.http_status not in (404, 507):
error_log('Giving up on /%s/%s/%s/%s: %s' % (part, account,
container, obj, err))
except (Exception, Timeout), err:
error_log('Giving up on /%s/%s/%s/%s: %s' % (part, account,
container, obj, err))
object_copies_found[found_count] += 1
objects_queried[0] += 1
if time() >= next_report[0]:
next_report[0] = time() + 5
eta, eta_unit = compute_eta(begun, objects_queried[0],
objects_listed)
print '\r\x1B[KQuerying objects: %d of %d, %d%s left, %d ' \
'retries' % (objects_queried[0], objects_listed, round(eta),
eta_unit, retries_done[0]),
object_parts = {}
for obj in objects:
part, nodes = object_ring.get_nodes(account, container, obj)
if part not in object_parts:
object_parts[part] = part
coropool.spawn(direct, obj, part, nodes)
coropool.waitall()
distinct_partitions = len(object_parts)
copies_expected = distinct_partitions * object_ring.replica_count
copies_found = sum(a * b for a, b in enumerate(object_copies_found))
value = 100.0 * copies_found / copies_expected
elapsed, elapsed_unit = get_time_units(time() - begun)
print '\r\x1B[KQueried %d objects for dispersion reporting, ' \
'%d%s, %d retries' % (objects_listed, round(elapsed),
elapsed_unit, retries_done[0])
if objects_listed - distinct_partitions:
print 'There were %d overlapping partitions' % (
objects_listed - distinct_partitions)
if object_copies_found[2]:
print 'There were %d partitions missing one copy.' % \
object_copies_found[2]
if object_copies_found[1]:
print '! There were %d partitions missing two copies.' % \
object_copies_found[1]
if object_copies_found[0]:
print '!!! There were %d partitions missing all copies.' % \
object_copies_found[0]
print '%.02f%% of object copies found (%d of %d)' % \
(value, copies_found, copies_expected)
print 'Sample represents %.02f%% of the object partition space' % (
100.0 * distinct_partitions / object_ring.partition_count)
if __name__ == '__main__':
patcher.monkey_patch()
hubs.get_hub().debug_exceptions = False
conffile = '/etc/swift/dispersion.conf'
if len(argv) == 2:
conffile = argv[1]
elif len(argv) > 2:
exit('Syntax: %s [conffile]' % argv[0])
c = ConfigParser()
if not c.read(conffile):
exit('Unable to read config file: %s' % conffile)
conf = dict(c.items('dispersion'))
swift_dir = conf.get('swift_dir', '/etc/swift')
dispersion_coverage = int(conf.get('dispersion_coverage', 1))
retries = int(conf.get('retries', 5))
concurrency = int(conf.get('concurrency', 25))
coropool = GreenPool(size=concurrency)
url, token = get_auth(conf['auth_url'], conf['auth_user'],
conf['auth_key'])
account = url.rsplit('/', 1)[1]
connpool = Pool(max_size=concurrency)
connpool.create = lambda: Connection(conf['auth_url'],
conf['auth_user'], conf['auth_key'],
retries=retries,
preauthurl=url, preauthtoken=token)
container_ring = Ring(os.path.join(swift_dir, 'container.ring.gz'))
object_ring = Ring(os.path.join(swift_dir, 'object.ring.gz'))
container_dispersion_report(coropool, connpool, account, container_ring,
retries)
object_dispersion_report(coropool, connpool, account, object_ring, retries)