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import errno
import json
import itertools
import socket
import time
from threading import Event
from telegraf.basesocket import BaseSocket
from telegraf.protocol import Line
from mgr_module import MgrModule, PG_STATES
try:
from urllib.parse import urlparse
except ImportError:
from urlparse import urlparse
class Module(MgrModule):
COMMANDS = [
{
"cmd": "telegraf config-set name=key,type=CephString "
"name=value,type=CephString",
"desc": "Set a configuration value",
"perm": "rw"
},
{
"cmd": "telegraf config-show",
"desc": "Show current configuration",
"perm": "r"
},
{
"cmd": "telegraf send",
"desc": "Force sending data to Telegraf",
"perm": "rw"
},
]
MODULE_OPTIONS = [
{
'name': 'address',
'default': 'unixgram:///tmp/telegraf.sock',
},
{
'name': 'interval',
'type': 'secs',
'default': 15
}
]
ceph_health_mapping = {'HEALTH_OK': 0, 'HEALTH_WARN': 1, 'HEALTH_ERR': 2}
@property
def config_keys(self):
return dict((o['name'], o.get('default', None)) for o in self.MODULE_OPTIONS)
def __init__(self, *args, **kwargs):
super(Module, self).__init__(*args, **kwargs)
self.event = Event()
self.run = True
self.fsid = None
self.config = dict()
def get_fsid(self):
if not self.fsid:
self.fsid = self.get('mon_map')['fsid']
return self.fsid
def get_pool_stats(self):
df = self.get('df')
df_types = [
'bytes_used',
'kb_used',
'dirty',
'rd',
'rd_bytes',
'stored_raw',
'wr',
'wr_bytes',
'objects',
'max_avail',
'quota_objects',
'quota_bytes'
]
for df_type in df_types:
for pool in df['pools']:
yield {
'measurement': 'ceph_pool_stats',
'tags': {
'pool_name': pool['name'],
'pool_id': pool['id'],
'type_instance': df_type,
'fsid': self.get_fsid()
},
'value': pool['stats'][df_type],
}
def get_daemon_stats(self):
for daemon, counters in self.get_all_perf_counters().items():
svc_type, svc_id = daemon.split('.', 1)
metadata = self.get_metadata(svc_type, svc_id)
if not metadata:
continue
for path, counter_info in counters.items():
if counter_info['type'] & self.PERFCOUNTER_HISTOGRAM:
continue
yield {
'measurement': 'ceph_daemon_stats',
'tags': {
'ceph_daemon': daemon,
'type_instance': path,
'host': metadata['hostname'],
'fsid': self.get_fsid()
},
'value': counter_info['value']
}
def get_pg_stats(self):
stats = dict()
pg_status = self.get('pg_status')
for key in ['bytes_total', 'data_bytes', 'bytes_used', 'bytes_avail',
'num_pgs', 'num_objects', 'num_pools']:
stats[key] = pg_status[key]
for state in PG_STATES:
stats['num_pgs_{0}'.format(state)] = 0
stats['num_pgs'] = pg_status['num_pgs']
for state in pg_status['pgs_by_state']:
states = state['state_name'].split('+')
for s in PG_STATES:
key = 'num_pgs_{0}'.format(s)
if s in states:
stats[key] += state['count']
return stats
def get_cluster_stats(self):
stats = dict()
health = json.loads(self.get('health')['json'])
stats['health'] = self.ceph_health_mapping.get(health['status'])
mon_status = json.loads(self.get('mon_status')['json'])
stats['num_mon'] = len(mon_status['monmap']['mons'])
stats['mon_election_epoch'] = mon_status['election_epoch']
stats['mon_outside_quorum'] = len(mon_status['outside_quorum'])
stats['mon_quorum'] = len(mon_status['quorum'])
osd_map = self.get('osd_map')
stats['num_osd'] = len(osd_map['osds'])
stats['num_pg_temp'] = len(osd_map['pg_temp'])
stats['osd_epoch'] = osd_map['epoch']
mgr_map = self.get('mgr_map')
stats['mgr_available'] = int(mgr_map['available'])
stats['num_mgr_standby'] = len(mgr_map['standbys'])
stats['mgr_epoch'] = mgr_map['epoch']
num_up = 0
num_in = 0
for osd in osd_map['osds']:
if osd['up'] == 1:
num_up += 1
if osd['in'] == 1:
num_in += 1
stats['num_osd_up'] = num_up
stats['num_osd_in'] = num_in
fs_map = self.get('fs_map')
stats['num_mds_standby'] = len(fs_map['standbys'])
stats['num_fs'] = len(fs_map['filesystems'])
stats['mds_epoch'] = fs_map['epoch']
num_mds_up = 0
for fs in fs_map['filesystems']:
num_mds_up += len(fs['mdsmap']['up'])
stats['num_mds_up'] = num_mds_up
stats['num_mds'] = num_mds_up + stats['num_mds_standby']
stats.update(self.get_pg_stats())
for key, value in stats.items():
yield {
'measurement': 'ceph_cluster_stats',
'tags': {
'type_instance': key,
'fsid': self.get_fsid()
},
'value': int(value)
}
def set_config_option(self, option, value):
if option not in self.config_keys.keys():
raise RuntimeError('{0} is a unknown configuration '
'option'.format(option))
if option in ['interval']:
try:
value = int(value)
except (ValueError, TypeError):
raise RuntimeError('invalid {0} configured. Please specify '
'a valid integer'.format(option))
if option == 'interval' and value < 5:
raise RuntimeError('interval should be set to at least 5 seconds')
self.config[option] = value
def init_module_config(self):
self.config['address'] = \
self.get_module_option("address", default=self.config_keys['address'])
self.config['interval'] = \
int(self.get_module_option("interval",
default=self.config_keys['interval']))
def now(self):
return int(round(time.time() * 1000000000))
def gather_measurements(self):
return itertools.chain(
self.get_pool_stats(),
self.get_daemon_stats(),
self.get_cluster_stats()
)
def send_to_telegraf(self):
url = urlparse(self.config['address'])
sock = BaseSocket(url)
self.log.debug('Sending data to Telegraf at %s', sock.address)
now = self.now()
try:
with sock as s:
for measurement in self.gather_measurements():
self.log.debug(measurement)
line = Line(measurement['measurement'],
measurement['value'],
measurement['tags'], now)
self.log.debug(line.to_line_protocol())
s.send(line.to_line_protocol())
except (socket.error, RuntimeError, IOError, OSError):
self.log.exception('Failed to send statistics to Telegraf:')
except FileNotFoundError:
self.log.exception('Failed to open Telegraf at: %s', url.geturl())
def shutdown(self):
self.log.info('Stopping Telegraf module')
self.run = False
self.event.set()
def handle_command(self, inbuf, cmd):
if cmd['prefix'] == 'telegraf config-show':
return 0, json.dumps(self.config), ''
elif cmd['prefix'] == 'telegraf config-set':
key = cmd['key']
value = cmd['value']
if not value:
return -errno.EINVAL, '', 'Value should not be empty or None'
self.log.debug('Setting configuration option %s to %s', key, value)
self.set_config_option(key, value)
self.set_module_option(key, value)
return 0, 'Configuration option {0} updated'.format(key), ''
elif cmd['prefix'] == 'telegraf send':
self.send_to_telegraf()
return 0, 'Sending data to Telegraf', ''
return (-errno.EINVAL, '',
"Command not found '{0}'".format(cmd['prefix']))
def self_test(self):
measurements = list(self.gather_measurements())
if len(measurements) == 0:
raise RuntimeError('No measurements found')
def serve(self):
self.log.info('Starting Telegraf module')
self.init_module_config()
self.run = True
self.log.debug('Waiting 10 seconds before starting')
self.event.wait(10)
while self.run:
start = self.now()
self.send_to_telegraf()
runtime = (self.now() - start) / 1000000
self.log.debug('Sending data to Telegraf took %d ms', runtime)
self.log.debug("Sleeping for %d seconds", self.config['interval'])
self.event.wait(self.config['interval'])
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