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"""
Zabbix module for ceph-mgr
Collect statistics from Ceph cluster and every X seconds send data to a Zabbix
server using the zabbix_sender executable.
"""
import logging
import json
import errno
import re
from subprocess import Popen, PIPE
from threading import Event
from mgr_module import CLIReadCommand, CLIWriteCommand, MgrModule, Option, OptionValue
from typing import cast, Any, Dict, List, Mapping, Optional, Sequence, Tuple, Union
def avg(data: Sequence[Union[int, float]]) -> float:
if len(data):
return sum(data) / float(len(data))
else:
return 0
class ZabbixSender(object):
def __init__(self, sender: str, host: str, port: int, log: logging.Logger) -> None:
self.sender = sender
self.host = host
self.port = port
self.log = log
def send(self, hostname: str, data: Mapping[str, Union[int, float, str]]) -> None:
if len(data) == 0:
return
cmd = [self.sender, '-z', self.host, '-p', str(self.port), '-s',
hostname, '-vv', '-i', '-']
self.log.debug('Executing: %s', cmd)
proc = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE, encoding='utf-8')
for key, value in data.items():
assert proc.stdin
proc.stdin.write('{0} ceph.{1} {2}\n'.format(hostname, key, value))
stdout, stderr = proc.communicate()
if proc.returncode != 0:
raise RuntimeError('%s exited non-zero: %s' % (self.sender,
stderr))
self.log.debug('Zabbix Sender: %s', stdout.rstrip())
class Module(MgrModule):
run = False
config: Dict[str, OptionValue] = {}
ceph_health_mapping = {'HEALTH_OK': 0, 'HEALTH_WARN': 1, 'HEALTH_ERR': 2}
_zabbix_hosts: List[Dict[str, Union[str, int]]] = list()
@property
def config_keys(self) -> Dict[str, OptionValue]:
return dict((o['name'], o.get('default', None))
for o in self.MODULE_OPTIONS)
MODULE_OPTIONS = [
Option(
name='zabbix_sender',
default='/usr/bin/zabbix_sender'),
Option(
name='zabbix_host',
type='str',
default=None),
Option(
name='zabbix_port',
type='int',
default=10051),
Option(
name='identifier',
default=""),
Option(
name='interval',
type='secs',
default=60),
Option(
name='discovery_interval',
type='uint',
default=100)
]
def __init__(self, *args: Any, **kwargs: Any) -> None:
super(Module, self).__init__(*args, **kwargs)
self.event = Event()
def init_module_config(self) -> None:
self.fsid = self.get('mon_map')['fsid']
self.log.debug('Found Ceph fsid %s', self.fsid)
for key, default in self.config_keys.items():
self.set_config_option(key, self.get_module_option(key, default))
if self.config['zabbix_host']:
self._parse_zabbix_hosts()
def set_config_option(self, option: str, value: OptionValue) -> bool:
if option not in self.config_keys.keys():
raise RuntimeError('{0} is a unknown configuration '
'option'.format(option))
if option in ['zabbix_port', 'interval', 'discovery_interval']:
try:
int_value = int(value) # type: ignore
except (ValueError, TypeError):
raise RuntimeError('invalid {0} configured. Please specify '
'a valid integer'.format(option))
if option == 'interval' and int_value < 10:
raise RuntimeError('interval should be set to at least 10 seconds')
if option == 'discovery_interval' and int_value < 10:
raise RuntimeError(
"discovery_interval should not be more frequent "
"than once in 10 regular data collection"
)
self.log.debug('Setting in-memory config option %s to: %s', option,
value)
self.config[option] = value
return True
def _parse_zabbix_hosts(self) -> None:
self._zabbix_hosts = list()
servers = cast(str, self.config['zabbix_host']).split(",")
for server in servers:
uri = re.match("(?:(?:\[?)([a-z0-9-\.]+|[a-f0-9:\.]+)(?:\]?))(?:((?::))([0-9]{1,5}))?$", server)
if uri:
zabbix_host, sep, opt_zabbix_port = uri.groups()
if sep == ':':
zabbix_port = int(opt_zabbix_port)
else:
zabbix_port = cast(int, self.config['zabbix_port'])
self._zabbix_hosts.append({'zabbix_host': zabbix_host, 'zabbix_port': zabbix_port})
else:
self.log.error('Zabbix host "%s" is not valid', server)
self.log.error('Parsed Zabbix hosts: %s', self._zabbix_hosts)
def get_pg_stats(self) -> Dict[str, int]:
stats = dict()
pg_states = ['active', 'peering', 'clean', 'scrubbing', 'undersized',
'backfilling', 'recovering', 'degraded', 'inconsistent',
'remapped', 'backfill_toofull', 'backfill_wait',
'recovery_wait']
for state in pg_states:
stats['num_pg_{0}'.format(state)] = 0
pg_status = self.get('pg_status')
stats['num_pg'] = pg_status['num_pgs']
for state in pg_status['pgs_by_state']:
states = state['state_name'].split('+')
for s in pg_states:
key = 'num_pg_{0}'.format(s)
if s in states:
stats[key] += state['count']
return stats
def get_data(self) -> Dict[str, Union[int, float]]:
data = dict()
health = json.loads(self.get('health')['json'])
# 'status' is luminous+, 'overall_status' is legacy mode.
data['overall_status'] = health.get('status',
health.get('overall_status'))
data['overall_status_int'] = \
self.ceph_health_mapping.get(data['overall_status'])
mon_status = json.loads(self.get('mon_status')['json'])
data['num_mon'] = len(mon_status['monmap']['mons'])
df = self.get('df')
data['num_pools'] = len(df['pools'])
data['total_used_bytes'] = df['stats']['total_used_bytes']
data['total_bytes'] = df['stats']['total_bytes']
data['total_avail_bytes'] = df['stats']['total_avail_bytes']
wr_ops = 0
rd_ops = 0
wr_bytes = 0
rd_bytes = 0
for pool in df['pools']:
wr_ops += pool['stats']['wr']
rd_ops += pool['stats']['rd']
wr_bytes += pool['stats']['wr_bytes']
rd_bytes += pool['stats']['rd_bytes']
data['[{0},rd_bytes]'.format(pool['name'])] = pool['stats']['rd_bytes']
data['[{0},wr_bytes]'.format(pool['name'])] = pool['stats']['wr_bytes']
data['[{0},rd_ops]'.format(pool['name'])] = pool['stats']['rd']
data['[{0},wr_ops]'.format(pool['name'])] = pool['stats']['wr']
data['[{0},bytes_used]'.format(pool['name'])] = pool['stats']['bytes_used']
data['[{0},stored_raw]'.format(pool['name'])] = pool['stats']['stored_raw']
data['[{0},percent_used]'.format(pool['name'])] = pool['stats']['percent_used'] * 100
data['wr_ops'] = wr_ops
data['rd_ops'] = rd_ops
data['wr_bytes'] = wr_bytes
data['rd_bytes'] = rd_bytes
osd_map = self.get('osd_map')
data['num_osd'] = len(osd_map['osds'])
data['osd_nearfull_ratio'] = osd_map['nearfull_ratio']
data['osd_full_ratio'] = osd_map['full_ratio']
data['osd_backfillfull_ratio'] = osd_map['backfillfull_ratio']
data['num_pg_temp'] = len(osd_map['pg_temp'])
num_up = 0
num_in = 0
for osd in osd_map['osds']:
data['[osd.{0},up]'.format(int(osd['osd']))] = osd['up']
if osd['up'] == 1:
num_up += 1
data['[osd.{0},in]'.format(int(osd['osd']))] = osd['in']
if osd['in'] == 1:
num_in += 1
data['num_osd_up'] = num_up
data['num_osd_in'] = num_in
osd_fill = list()
osd_pgs = list()
osd_apply_latency_ns = list()
osd_commit_latency_ns = list()
osd_stats = self.get('osd_stats')
for osd in osd_stats['osd_stats']:
try:
osd_fill.append((float(osd['kb_used']) / float(osd['kb'])) * 100)
data['[osd.{0},osd_fill]'.format(osd['osd'])] = (
float(osd['kb_used']) / float(osd['kb'])) * 100
except ZeroDivisionError:
continue
osd_pgs.append(osd['num_pgs'])
osd_apply_latency_ns.append(osd['perf_stat']['apply_latency_ns'])
osd_commit_latency_ns.append(osd['perf_stat']['commit_latency_ns'])
data['[osd.{0},num_pgs]'.format(osd['osd'])] = osd['num_pgs']
data[
'[osd.{0},osd_latency_apply]'.format(osd['osd'])
] = osd['perf_stat']['apply_latency_ns'] / 1000000.0 # ns -> ms
data[
'[osd.{0},osd_latency_commit]'.format(osd['osd'])
] = osd['perf_stat']['commit_latency_ns'] / 1000000.0 # ns -> ms
try:
data['osd_max_fill'] = max(osd_fill)
data['osd_min_fill'] = min(osd_fill)
data['osd_avg_fill'] = avg(osd_fill)
data['osd_max_pgs'] = max(osd_pgs)
data['osd_min_pgs'] = min(osd_pgs)
data['osd_avg_pgs'] = avg(osd_pgs)
except ValueError:
pass
try:
data['osd_latency_apply_max'] = max(osd_apply_latency_ns) / 1000000.0 # ns -> ms
data['osd_latency_apply_min'] = min(osd_apply_latency_ns) / 1000000.0 # ns -> ms
data['osd_latency_apply_avg'] = avg(osd_apply_latency_ns) / 1000000.0 # ns -> ms
data['osd_latency_commit_max'] = max(osd_commit_latency_ns) / 1000000.0 # ns -> ms
data['osd_latency_commit_min'] = min(osd_commit_latency_ns) / 1000000.0 # ns -> ms
data['osd_latency_commit_avg'] = avg(osd_commit_latency_ns) / 1000000.0 # ns -> ms
except ValueError:
pass
data.update(self.get_pg_stats())
return data
def send(self, data: Mapping[str, Union[int, float, str]]) -> bool:
identifier = cast(Optional[str], self.config['identifier'])
if identifier is None or len(identifier) == 0:
identifier = 'ceph-{0}'.format(self.fsid)
if not self.config['zabbix_host'] or not self._zabbix_hosts:
self.log.error('Zabbix server not set, please configure using: '
'ceph zabbix config-set zabbix_host <zabbix_host>')
self.set_health_checks({
'MGR_ZABBIX_NO_SERVER': {
'severity': 'warning',
'summary': 'No Zabbix server configured',
'detail': ['Configuration value zabbix_host not configured']
}
})
return False
result = True
for server in self._zabbix_hosts:
self.log.info(
'Sending data to Zabbix server %s, port %s as host/identifier %s',
server['zabbix_host'], server['zabbix_port'], identifier)
self.log.debug(data)
try:
zabbix = ZabbixSender(cast(str, self.config['zabbix_sender']),
cast(str, server['zabbix_host']),
cast(int, server['zabbix_port']), self.log)
zabbix.send(identifier, data)
except Exception as exc:
self.log.exception('Failed to send.')
self.set_health_checks({
'MGR_ZABBIX_SEND_FAILED': {
'severity': 'warning',
'summary': 'Failed to send data to Zabbix',
'detail': [str(exc)]
}
})
result = False
self.set_health_checks(dict())
return result
def discovery(self) -> bool:
osd_map = self.get('osd_map')
osd_map_crush = self.get('osd_map_crush')
# Discovering ceph pools
pool_discovery = {
pool['pool_name']: step['item_name']
for pool in osd_map['pools']
for rule in osd_map_crush['rules'] if rule['rule_id'] == pool['crush_rule']
for step in rule['steps'] if step['op'] == "take"
}
pools_discovery_data = {"data": [
{
"{#POOL}": pool,
"{#CRUSH_RULE}": rule
}
for pool, rule in pool_discovery.items()
]}
# Discovering OSDs
# Getting hosts for found crush rules
osd_roots = {
step['item_name']: [
item['id']
for item in root_bucket['items']
]
for rule in osd_map_crush['rules']
for step in rule['steps'] if step['op'] == "take"
for root_bucket in osd_map_crush['buckets']
if root_bucket['id'] == step['item']
}
# Getting osds for hosts with map to crush_rule
osd_discovery = {
item['id']: crush_rule
for crush_rule, roots in osd_roots.items()
for root in roots
for bucket in osd_map_crush['buckets']
if bucket['id'] == root
for item in bucket['items']
}
osd_discovery_data = {"data": [
{
"{#OSD}": osd,
"{#CRUSH_RULE}": rule
}
for osd, rule in osd_discovery.items()
]}
# Preparing recieved data for sending
data = {
"zabbix.pool.discovery": json.dumps(pools_discovery_data),
"zabbix.osd.discovery": json.dumps(osd_discovery_data)
}
return bool(self.send(data))
@CLIReadCommand('zabbix config-show')
def config_show(self) -> Tuple[int, str, str]:
"""
Show current configuration
"""
return 0, json.dumps(self.config, indent=4, sort_keys=True), ''
@CLIWriteCommand('zabbix config-set')
def config_set(self, key: str, value: str) -> Tuple[int, str, str]:
"""
Set a configuration 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)
if self.set_config_option(key, value):
self.set_module_option(key, value)
if key == 'zabbix_host' or key == 'zabbix_port':
self._parse_zabbix_hosts()
return 0, 'Configuration option {0} updated'.format(key), ''
return 1,\
'Failed to update configuration option {0}'.format(key), ''
@CLIReadCommand('zabbix send')
def do_send(self) -> Tuple[int, str, str]:
"""
Force sending data to Zabbix
"""
data = self.get_data()
if self.send(data):
return 0, 'Sending data to Zabbix', ''
return 1, 'Failed to send data to Zabbix', ''
@CLIReadCommand('zabbix discovery')
def do_discovery(self) -> Tuple[int, str, str]:
"""
Discovering Zabbix data
"""
if self.discovery():
return 0, 'Sending discovery data to Zabbix', ''
return 1, 'Failed to send discovery data to Zabbix', ''
def shutdown(self) -> None:
self.log.info('Stopping zabbix')
self.run = False
self.event.set()
def serve(self) -> None:
self.log.info('Zabbix module starting up')
self.run = True
self.init_module_config()
discovery_interval = self.config['discovery_interval']
# We are sending discovery once plugin is loaded
discovery_counter = cast(int, discovery_interval)
while self.run:
self.log.debug('Waking up for new iteration')
if discovery_counter == discovery_interval:
try:
self.discovery()
except Exception:
# Shouldn't happen, but let's log it and retry next interval,
# rather than dying completely.
self.log.exception("Unexpected error during discovery():")
finally:
discovery_counter = 0
try:
data = self.get_data()
self.send(data)
except Exception:
# Shouldn't happen, but let's log it and retry next interval,
# rather than dying completely.
self.log.exception("Unexpected error during send():")
interval = cast(float, self.config['interval'])
self.log.debug('Sleeping for %d seconds', interval)
discovery_counter += 1
self.event.wait(interval)
def self_test(self) -> None:
data = self.get_data()
if data['overall_status'] not in self.ceph_health_mapping:
raise RuntimeError('No valid overall_status found in data')
int(data['overall_status_int'])
if data['num_mon'] < 1:
raise RuntimeError('num_mon is smaller than 1')
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