/usr/lib/python2.7/dist-packages/swift/common/middleware/recon.py is in python-swift 2.7.0-0ubuntu2.
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#
# 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 errno
import json
import os
import time
from swift import gettext_ as _
from swift import __version__ as swiftver
from swift.common.storage_policy import POLICIES
from swift.common.swob import Request, Response
from swift.common.utils import get_logger, config_true_value, \
SWIFT_CONF_FILE
from swift.common.constraints import check_mount
from resource import getpagesize
from hashlib import md5
class ReconMiddleware(object):
"""
Recon middleware used for monitoring.
/recon/load|mem|async... will return various system metrics.
Needs to be added to the pipeline and requires a filter
declaration in the object-server.conf:
[filter:recon]
use = egg:swift#recon
recon_cache_path = /var/cache/swift
"""
def __init__(self, app, conf, *args, **kwargs):
self.app = app
self.devices = conf.get('devices', '/srv/node')
swift_dir = conf.get('swift_dir', '/etc/swift')
self.logger = get_logger(conf, log_route='recon')
self.recon_cache_path = conf.get('recon_cache_path',
'/var/cache/swift')
self.object_recon_cache = os.path.join(self.recon_cache_path,
'object.recon')
self.container_recon_cache = os.path.join(self.recon_cache_path,
'container.recon')
self.account_recon_cache = os.path.join(self.recon_cache_path,
'account.recon')
self.drive_recon_cache = os.path.join(self.recon_cache_path,
'drive.recon')
self.account_ring_path = os.path.join(swift_dir, 'account.ring.gz')
self.container_ring_path = os.path.join(swift_dir, 'container.ring.gz')
self.rings = [self.account_ring_path, self.container_ring_path]
# include all object ring files (for all policies)
for policy in POLICIES:
self.rings.append(os.path.join(swift_dir,
policy.ring_name + '.ring.gz'))
self.mount_check = config_true_value(conf.get('mount_check', 'true'))
def _from_recon_cache(self, cache_keys, cache_file, openr=open):
"""retrieve values from a recon cache file
:params cache_keys: list of cache items to retrieve
:params cache_file: cache file to retrieve items from.
:params openr: open to use [for unittests]
:return: dict of cache items and their values or none if not found
"""
try:
with openr(cache_file, 'r') as f:
recondata = json.load(f)
return dict((key, recondata.get(key)) for key in cache_keys)
except IOError:
self.logger.exception(_('Error reading recon cache file'))
except ValueError:
self.logger.exception(_('Error parsing recon cache file'))
except Exception:
self.logger.exception(_('Error retrieving recon data'))
return dict((key, None) for key in cache_keys)
def get_version(self):
"""get swift version"""
verinfo = {'version': swiftver}
return verinfo
def get_mounted(self, openr=open):
"""get ALL mounted fs from /proc/mounts"""
mounts = []
with openr('/proc/mounts', 'r') as procmounts:
for line in procmounts:
mount = {}
mount['device'], mount['path'], opt1, opt2, opt3, \
opt4 = line.rstrip().split()
mounts.append(mount)
return mounts
def get_load(self, openr=open):
"""get info from /proc/loadavg"""
loadavg = {}
with openr('/proc/loadavg', 'r') as f:
onemin, fivemin, ftmin, tasks, procs = f.read().rstrip().split()
loadavg['1m'] = float(onemin)
loadavg['5m'] = float(fivemin)
loadavg['15m'] = float(ftmin)
loadavg['tasks'] = tasks
loadavg['processes'] = int(procs)
return loadavg
def get_mem(self, openr=open):
"""get info from /proc/meminfo"""
meminfo = {}
with openr('/proc/meminfo', 'r') as memlines:
for i in memlines:
entry = i.rstrip().split(":")
meminfo[entry[0]] = entry[1].strip()
return meminfo
def get_async_info(self):
"""get # of async pendings"""
return self._from_recon_cache(['async_pending'],
self.object_recon_cache)
def get_driveaudit_error(self):
"""get # of drive audit errors"""
return self._from_recon_cache(['drive_audit_errors'],
self.drive_recon_cache)
def get_replication_info(self, recon_type):
"""get replication info"""
replication_list = ['replication_time',
'replication_stats',
'replication_last']
if recon_type == 'account':
return self._from_recon_cache(replication_list,
self.account_recon_cache)
elif recon_type == 'container':
return self._from_recon_cache(replication_list,
self.container_recon_cache)
elif recon_type == 'object':
replication_list += ['object_replication_time',
'object_replication_last']
return self._from_recon_cache(replication_list,
self.object_recon_cache)
else:
return None
def get_device_info(self):
"""get devices"""
try:
return {self.devices: os.listdir(self.devices)}
except Exception:
self.logger.exception(_('Error listing devices'))
return {self.devices: None}
def get_updater_info(self, recon_type):
"""get updater info"""
if recon_type == 'container':
return self._from_recon_cache(['container_updater_sweep'],
self.container_recon_cache)
elif recon_type == 'object':
return self._from_recon_cache(['object_updater_sweep'],
self.object_recon_cache)
else:
return None
def get_expirer_info(self, recon_type):
"""get expirer info"""
if recon_type == 'object':
return self._from_recon_cache(['object_expiration_pass',
'expired_last_pass'],
self.object_recon_cache)
def get_auditor_info(self, recon_type):
"""get auditor info"""
if recon_type == 'account':
return self._from_recon_cache(['account_audits_passed',
'account_auditor_pass_completed',
'account_audits_since',
'account_audits_failed'],
self.account_recon_cache)
elif recon_type == 'container':
return self._from_recon_cache(['container_audits_passed',
'container_auditor_pass_completed',
'container_audits_since',
'container_audits_failed'],
self.container_recon_cache)
elif recon_type == 'object':
return self._from_recon_cache(['object_auditor_stats_ALL',
'object_auditor_stats_ZBF'],
self.object_recon_cache)
else:
return None
def get_unmounted(self):
"""list unmounted (failed?) devices"""
mountlist = []
for entry in os.listdir(self.devices):
if not os.path.isdir(os.path.join(self.devices, entry)):
continue
try:
mounted = check_mount(self.devices, entry)
except OSError as err:
mounted = str(err)
mpoint = {'device': entry, 'mounted': mounted}
if mpoint['mounted'] is not True:
mountlist.append(mpoint)
return mountlist
def get_diskusage(self):
"""get disk utilization statistics"""
devices = []
for entry in os.listdir(self.devices):
if not os.path.isdir(os.path.join(self.devices, entry)):
continue
try:
mounted = check_mount(self.devices, entry)
except OSError as err:
devices.append({'device': entry, 'mounted': str(err),
'size': '', 'used': '', 'avail': ''})
continue
if mounted:
path = os.path.join(self.devices, entry)
disk = os.statvfs(path)
capacity = disk.f_bsize * disk.f_blocks
available = disk.f_bsize * disk.f_bavail
used = disk.f_bsize * (disk.f_blocks - disk.f_bavail)
devices.append({'device': entry, 'mounted': True,
'size': capacity, 'used': used,
'avail': available})
else:
devices.append({'device': entry, 'mounted': False,
'size': '', 'used': '', 'avail': ''})
return devices
def get_ring_md5(self, openr=open):
"""get all ring md5sum's"""
sums = {}
for ringfile in self.rings:
md5sum = md5()
if os.path.exists(ringfile):
try:
with openr(ringfile, 'rb') as f:
block = f.read(4096)
while block:
md5sum.update(block)
block = f.read(4096)
sums[ringfile] = md5sum.hexdigest()
except IOError as err:
sums[ringfile] = None
if err.errno != errno.ENOENT:
self.logger.exception(_('Error reading ringfile'))
return sums
def get_swift_conf_md5(self, openr=open):
"""get md5 of swift.conf"""
md5sum = md5()
try:
with openr(SWIFT_CONF_FILE, 'r') as fh:
chunk = fh.read(4096)
while chunk:
md5sum.update(chunk)
chunk = fh.read(4096)
except IOError as err:
if err.errno != errno.ENOENT:
self.logger.exception(_('Error reading swift.conf'))
hexsum = None
else:
hexsum = md5sum.hexdigest()
return {SWIFT_CONF_FILE: hexsum}
def get_quarantine_count(self):
"""get obj/container/account quarantine counts"""
qcounts = {"objects": 0, "containers": 0, "accounts": 0,
"policies": {}}
qdir = "quarantined"
for device in os.listdir(self.devices):
qpath = os.path.join(self.devices, device, qdir)
if os.path.exists(qpath):
for qtype in os.listdir(qpath):
qtgt = os.path.join(qpath, qtype)
linkcount = os.lstat(qtgt).st_nlink
if linkcount > 2:
if qtype.startswith('objects'):
if '-' in qtype:
pkey = qtype.split('-', 1)[1]
else:
pkey = '0'
qcounts['policies'].setdefault(pkey,
{'objects': 0})
qcounts['policies'][pkey]['objects'] \
+= linkcount - 2
qcounts['objects'] += linkcount - 2
else:
qcounts[qtype] += linkcount - 2
return qcounts
def get_socket_info(self, openr=open):
"""
get info from /proc/net/sockstat and sockstat6
Note: The mem value is actually kernel pages, but we return bytes
allocated based on the systems page size.
"""
sockstat = {}
try:
with openr('/proc/net/sockstat', 'r') as proc_sockstat:
for entry in proc_sockstat:
if entry.startswith("TCP: inuse"):
tcpstats = entry.split()
sockstat['tcp_in_use'] = int(tcpstats[2])
sockstat['orphan'] = int(tcpstats[4])
sockstat['time_wait'] = int(tcpstats[6])
sockstat['tcp_mem_allocated_bytes'] = \
int(tcpstats[10]) * getpagesize()
except IOError as e:
if e.errno != errno.ENOENT:
raise
try:
with openr('/proc/net/sockstat6', 'r') as proc_sockstat6:
for entry in proc_sockstat6:
if entry.startswith("TCP6: inuse"):
sockstat['tcp6_in_use'] = int(entry.split()[2])
except IOError as e:
if e.errno != errno.ENOENT:
raise
return sockstat
def get_time(self):
"""get current time"""
return time.time()
def GET(self, req):
root, rcheck, rtype = req.split_path(1, 3, True)
all_rtypes = ['account', 'container', 'object']
if rcheck == "mem":
content = self.get_mem()
elif rcheck == "load":
content = self.get_load()
elif rcheck == "async":
content = self.get_async_info()
elif rcheck == 'replication' and rtype in all_rtypes:
content = self.get_replication_info(rtype)
elif rcheck == 'replication' and rtype is None:
# handle old style object replication requests
content = self.get_replication_info('object')
elif rcheck == "devices":
content = self.get_device_info()
elif rcheck == "updater" and rtype in ['container', 'object']:
content = self.get_updater_info(rtype)
elif rcheck == "auditor" and rtype in all_rtypes:
content = self.get_auditor_info(rtype)
elif rcheck == "expirer" and rtype == 'object':
content = self.get_expirer_info(rtype)
elif rcheck == "mounted":
content = self.get_mounted()
elif rcheck == "unmounted":
content = self.get_unmounted()
elif rcheck == "diskusage":
content = self.get_diskusage()
elif rcheck == "ringmd5":
content = self.get_ring_md5()
elif rcheck == "swiftconfmd5":
content = self.get_swift_conf_md5()
elif rcheck == "quarantined":
content = self.get_quarantine_count()
elif rcheck == "sockstat":
content = self.get_socket_info()
elif rcheck == "version":
content = self.get_version()
elif rcheck == "driveaudit":
content = self.get_driveaudit_error()
elif rcheck == "time":
content = self.get_time()
else:
content = "Invalid path: %s" % req.path
return Response(request=req, status="404 Not Found",
body=content, content_type="text/plain")
if content is not None:
return Response(request=req, body=json.dumps(content),
content_type="application/json")
else:
return Response(request=req, status="500 Server Error",
body="Internal server error.",
content_type="text/plain")
def __call__(self, env, start_response):
req = Request(env)
if req.path.startswith('/recon/'):
return self.GET(req)(env, start_response)
else:
return self.app(env, start_response)
def filter_factory(global_conf, **local_conf):
conf = global_conf.copy()
conf.update(local_conf)
def recon_filter(app):
return ReconMiddleware(app, conf)
return recon_filter
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