335 lines
14 KiB
Python
335 lines
14 KiB
Python
#!/usr/bin/env python
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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"""Collectd python plugin to read ceph storage stats from ceph command line for
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an OpenStack Cloud.
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"""
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import collectd
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import json
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import os
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import subprocess
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import time
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import traceback
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class CollectdCephStorage(object):
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def __init__(self):
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self.ceph_cluster = None
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self.ceph_rados_bench = False
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self.ceph_rados_bench_interval = 60
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self.ceph_mon_stats = False
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self.ceph_mon_stats_interval = 10
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self.ceph_osd_stats = False
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self.ceph_osd_stats_interval = 10
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self.ceph_pg_stats = False
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self.ceph_pg_stats_interval = 10
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self.ceph_pool_stats = False
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self.ceph_pool_stats_interval = 10
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def configure_callback(self, config):
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for node in config.children:
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val = str(node.values[0])
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if node.key == 'CephRadosBench':
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self.ceph_rados_bench = val in ['True', 'true']
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elif node.key == 'CephMONStats':
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self.ceph_mon_stats = val in ['True', 'true']
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elif node.key == 'CephOSDStats':
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self.ceph_osd_stats = val in ['True', 'true']
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elif node.key == 'CephPGStats':
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self.ceph_pg_stats = val in ['True', 'true']
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elif node.key == 'CephPoolStats':
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self.ceph_pool_stats = val in ['True', 'true']
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elif node.key == 'CephCluster':
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self.ceph_cluster = val
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elif node.key == 'CephRadosBenchInterval':
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self.ceph_rados_bench_interval = int(float(val))
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elif node.key == 'CephMONStatsInterval':
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self.ceph_mon_stats_interval = int(float(val))
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elif node.key == 'CephOSDStatsInterval':
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self.ceph_osd_stats_interval = int(float(val))
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elif node.key == 'CephPGStatsInterval':
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self.ceph_pg_stats_interval = int(float(val))
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elif node.key == 'CephPoolStatsInterval':
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self.ceph_pool_stats_interval = int(float(val))
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else:
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collectd.warning(
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'collectd-ceph-storage: Unknown config key: {}'
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.format(node.key))
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if not self.ceph_cluster:
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collectd.warning('collectd-ceph-storage: CephCluster Undefined')
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if self.ceph_rados_bench:
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collectd.info('Registered Ceph Rados Bench')
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collectd.register_read(
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self.read_ceph_rados_bench,
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self.ceph_rados_bench_interval, name='ceph-rados-bench')
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if self.ceph_mon_stats:
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collectd.info('Registered Ceph Mon')
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collectd.register_read(
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self.read_ceph_mon, self.ceph_mon_stats_interval,
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name='ceph-monitor')
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if self.ceph_osd_stats:
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collectd.info('Registered Ceph OSD')
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collectd.register_read(
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self.read_ceph_osd, self.ceph_osd_stats_interval,
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name='ceph-osd')
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if self.ceph_pg_stats:
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collectd.info('Registered Ceph PG')
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collectd.register_read(
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self.read_ceph_pg, self.ceph_pg_stats_interval, name='ceph-pg')
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if self.ceph_pool_stats:
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collectd.info('Registered Ceph Pool')
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collectd.register_read(
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self.read_ceph_pool, self.ceph_pool_stats_interval,
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name='ceph-pool')
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def dispatch_value(self, plugin_instance, type_instance, value, interval):
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metric = collectd.Values()
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metric.plugin = 'collectd-ceph-storage'
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metric.interval = interval
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metric.type = 'gauge'
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metric.plugin_instance = plugin_instance
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metric.type_instance = type_instance
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metric.values = [value]
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metric.dispatch()
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def read_ceph_rados_bench(self):
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"""Runs "rados bench" and collects latencies reported."""
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rados_bench_ran, output = self.run_command(
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['timeout', '30s', 'rados', '-p', 'rbd', 'bench', '10',
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'write', '-t', '1', '-b', '65536', '2>/dev/null', '|',
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'grep', '-i', 'latency', '|', 'awk',
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'\'{print 1000*$3}\''], False)
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if rados_bench_ran:
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results = output.split('\n')
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self.dispatch_value(
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'cluster', 'avg_latency', results[0],
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self.ceph_rados_bench_interval)
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self.dispatch_value(
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'cluster', 'stddev_latency', results[1],
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self.ceph_rados_bench_interval)
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self.dispatch_value(
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'cluster', 'max_latency', results[2],
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self.ceph_rados_bench_interval)
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self.dispatch_value(
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'cluster', 'min_latency', results[3],
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self.ceph_rados_bench_interval)
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def read_ceph_mon(self):
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"""Reads stats from "ceph mon dump" command."""
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mon_dump_ran, output = self.run_command(
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['ceph', 'mon', 'dump', '-f', 'json', '--cluster',
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self.ceph_cluster])
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if mon_dump_ran:
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json_data = json.loads(output)
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self.dispatch_value(
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'mon', 'number', len(json_data['mons']),
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self.ceph_mon_stats_interval)
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self.dispatch_value(
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'mon', 'quorum', len(json_data['quorum']),
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self.ceph_mon_stats_interval)
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def read_ceph_osd(self):
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"""Reads stats from "ceph osd dump" command."""
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osd_dump_ran, output = self.run_command(
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['ceph', 'osd', 'dump', '-f', 'json', '--cluster',
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self.ceph_cluster])
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if osd_dump_ran:
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json_data = json.loads(output)
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self.dispatch_value(
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'pool', 'number', len(json_data['pools']),
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self.ceph_osd_stats_interval)
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for pool in json_data['pools']:
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pool_name = 'pool-{}'.format(pool['pool_name'])
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self.dispatch_value(
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pool_name, 'size', pool['size'],
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self.ceph_osd_stats_interval)
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self.dispatch_value(
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pool_name, 'pg_num', pool['pg_num'],
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self.ceph_osd_stats_interval)
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self.dispatch_value(
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pool_name, 'pgp_num', pool['pg_placement_num'],
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self.ceph_osd_stats_interval)
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osds_up = 0
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osds_down = 0
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osds_in = 0
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osds_out = 0
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for osd in json_data['osds']:
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if osd['up'] == 1:
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osds_up += 1
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else:
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osds_down += 1
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if osd['in'] == 1:
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osds_in += 1
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else:
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osds_out += 1
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self.dispatch_value(
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'osd', 'up', osds_up, self.ceph_osd_stats_interval)
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self.dispatch_value(
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'osd', 'down', osds_down, self.ceph_osd_stats_interval)
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self.dispatch_value(
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'osd', 'in', osds_in, self.ceph_osd_stats_interval)
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self.dispatch_value(
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'osd', 'out', osds_out, self.ceph_osd_stats_interval)
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def read_ceph_pg(self):
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"""Reads stats from "ceph pg dump" command."""
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pg_dump_ran, output = self.run_command(
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['ceph', 'pg', 'dump', '-f', 'json', '--cluster',
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self.ceph_cluster])
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if pg_dump_ran:
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json_data = json.loads(output)
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pgs = {}
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for pg in json_data['pg_stats']:
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for state in pg['state'].split('+'):
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if state not in pgs:
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pgs[state] = 0
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pgs[state] += 1
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for state in pgs:
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self.dispatch_value(
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'pg', state, pgs[state], self.ceph_pg_stats_interval)
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for osd in json_data['osd_stats']:
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osd_id = 'osd-{}'.format(osd['osd'])
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self.dispatch_value(
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osd_id, 'kb_used', osd['kb_used'],
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self.ceph_pg_stats_interval)
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self.dispatch_value(
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osd_id, 'kb_total', osd['kb'], self.ceph_pg_stats_interval)
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self.dispatch_value(
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osd_id, 'snap_trim_queue_len', osd['snap_trim_queue_len'],
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self.ceph_pg_stats_interval)
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self.dispatch_value(
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osd_id, 'num_snap_trimming', osd['num_snap_trimming'],
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self.ceph_pg_stats_interval)
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if 'fs_perf_stat' in osd:
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self.dispatch_value(
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osd_id, 'apply_latency_ms',
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osd['fs_perf_stat']['apply_latency_ms'],
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self.ceph_pg_stats_interval)
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self.dispatch_value(
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osd_id, 'commit_latency_ms',
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osd['fs_perf_stat']['commit_latency_ms'],
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self.ceph_pg_stats_interval)
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elif 'perf_stat' in osd:
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self.dispatch_value(
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osd_id, 'apply_latency_ms',
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osd['perf_stat']['apply_latency_ms'],
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self.ceph_pg_stats_interval)
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self.dispatch_value(
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osd_id, 'commit_latency_ms',
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osd['perf_stat']['commit_latency_ms'],
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self.ceph_pg_stats_interval)
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def read_ceph_pool(self):
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"""Reads stats from "ceph osd pool" and "ceph df" commands."""
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stats_ran, stats_output = self.run_command(
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['ceph', 'osd', 'pool', 'stats', '-f', 'json'])
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df_ran, df_output = self.run_command(['ceph', 'df', '-f', 'json'])
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if stats_ran:
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json_stats_data = json.loads(stats_output)
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for pool in json_stats_data:
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pool_key = 'pool-{}'.format(pool['pool_name'])
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for stat in (
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'read_bytes_sec', 'write_bytes_sec', 'read_op_per_sec',
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'write_op_per_sec'):
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value = 0
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if stat in pool['client_io_rate']:
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value = pool['client_io_rate'][stat]
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self.dispatch_value(
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pool_key, stat, value, self.ceph_pool_stats_interval)
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if df_ran:
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json_df_data = json.loads(df_output)
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for pool in json_df_data['pools']:
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pool_key = 'pool-{}'.format(pool['name'])
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for stat in ('bytes_used', 'kb_used', 'objects'):
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value = pool['stats'][stat] if stat in pool['stats'] else 0
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self.dispatch_value(
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pool_key, stat, value, self.ceph_pool_stats_interval)
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if 'total_bytes' in json_df_data['stats']:
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# ceph 0.84+
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self.dispatch_value(
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'cluster', 'total_space',
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int(json_df_data['stats']['total_bytes']),
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self.ceph_pool_stats_interval)
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self.dispatch_value(
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'cluster', 'total_used',
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int(json_df_data['stats']['total_used_bytes']),
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self.ceph_pool_stats_interval)
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self.dispatch_value(
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'cluster', 'total_avail',
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int(json_df_data['stats']['total_avail_bytes']),
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self.ceph_pool_stats_interval)
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else:
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# ceph < 0.84
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self.dispatch_value(
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'cluster', 'total_space',
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int(json_df_data['stats']['total_space']) * 1024.0,
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self.ceph_pool_stats_interval)
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self.dispatch_value(
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'cluster', 'total_used',
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int(json_df_data['stats']['total_used']) * 1024.0,
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self.ceph_pool_stats_interval)
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self.dispatch_value(
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'cluster', 'total_avail',
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int(json_df_data['stats']['total_avail']) * 1024.0,
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self.ceph_pool_stats_interval)
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def run_command(self, command, check_output=True):
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"""Run a command for this collectd plugin. Returns a tuple with command
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success and output or False and None for output.
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"""
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output = None
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try:
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if check_output:
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output = subprocess.check_output(command)
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else:
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stdin, stdout, stderr = os.popen3(' '.join(command))
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output = stdout.read()
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except Exception as exc:
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collectd.error(
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'collectd-ceph-storage: {} exception: {}'.format(command, exc))
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collectd.error(
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'collectd-ceph-storage: {} traceback: {}'
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.format(command, traceback.format_exc()))
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return False, None
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if output is None:
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collectd.error(
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'collectd-ceph-storage: failed to {}: output is None'
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.format(command))
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return False, None
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return True, output
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collectd_ceph_storage = CollectdCephStorage()
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collectd.register_config(collectd_ceph_storage.configure_callback)
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