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elasticsearch_collectd.py
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#! /usr/bin/python
# Copyright 2014 Jeremy Carroll
#
# 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.
from __future__ import print_function
import collections
import json
import base64
import logging
import ssl
# Python 2/3 support for urllib2/urllib
try:
from urllib.request import urlopen, Request
from urllib.error import HTTPError, URLError
except ImportError:
from urllib2 import urlopen, Request, HTTPError, URLError
PREFIX = "elasticsearch"
CLUSTERS = []
DEFAULTS = set([
# AUTOMATICALLY GENERATED METRIC NAMES
# TO INCLUDE BY DEFAULT
"indices.total.docs.deleted",
"indices.total.fielddata.memory-size",
"indices.merges.total",
"cluster.number-of-nodes",
"process.open_file_descriptors",
"indices.total.merges.total",
"indices.total.store.size",
"indices.segments.count",
"indices.merges.current",
"jvm.mem.heap-used",
"indices.search.query-time",
"cluster.number-of-data_nodes",
"cluster.active-shards",
"indices.indexing.index-total",
"indices.get.total",
"cluster.unassigned-shards",
"indices.cache.field.size",
"jvm.gc.time",
"indices.store.size",
"thread_pool.get.rejected",
"indices.total.search.query-time",
"indices.search.query-total",
"indices.total.merges.total-time",
"cluster.active-primary-shards",
"indices.docs.deleted",
"indices.cache.filter.size",
"indices.total.search.query-total",
"indices.docs.count",
"indices.total.indexing.index-time",
"indices.total.indexing.index-total",
"jvm.mem.heap-committed",
"indices.total.docs.count",
"cluster.relocating-shards",
"thread_pool.rejected",
"jvm.uptime",
"indices.total.filter-cache.memory-size",
])
DEFAULTS.update([
# ADD ADDITIONAL METRIC NAMES
# TO INCLUDE BY DEFAULT
"cluster.status",
"indices.indexing.index-time",
"indices.merges.time",
"indices.store.throttle-time",
])
CLUSTER_STATUS = {'green': 0, 'yellow': 1, 'red': 2}
Stat = collections.namedtuple('Stat', ('type', 'path'))
# DICT: ElasticSearch 1.0.0
NODE_STATS = {
# STORE
'indices.store.throttle-time':
Stat("counter", "nodes.%s.indices.store.throttle_time_in_millis"),
# SEARCH
'indices.search.open-contexts':
Stat("gauge", "nodes.%s.indices.search.open_contexts"),
# CACHE
'indices.cache.field.eviction':
Stat("counter", "nodes.%s.indices.fielddata.evictions"),
'indices.cache.field.size':
Stat("gauge", "nodes.%s.indices.fielddata.memory_size_in_bytes"),
'indices.cache.filter.evictions':
Stat("counter", "nodes.%s.indices.filter_cache.evictions"),
'indices.cache.filter.size':
Stat("gauge", "nodes.%s.indices.filter_cache.memory_size_in_bytes"),
# GC
'jvm.gc.time':
Stat("counter",
"nodes.%s.jvm.gc.collectors.young.collection_time_in_millis"),
'jvm.gc.count':
Stat("counter", "nodes.%s.jvm.gc.collectors.young.collection_count"),
'jvm.gc.old-time':
Stat("counter",
"nodes.%s.jvm.gc.collectors.old.collection_time_in_millis"),
'jvm.gc.old-count':
Stat("counter", "nodes.%s.jvm.gc.collectors.old.collection_count"),
# FLUSH
'indices.flush.total':
Stat("counter", "nodes.%s.indices.flush.total"),
'indices.flush.time':
Stat("counter", "nodes.%s.indices.flush.total_time_in_millis"),
# MERGES
'indices.merges.current':
Stat("gauge", "nodes.%s.indices.merges.current"),
'indices.merges.current-docs':
Stat("gauge", "nodes.%s.indices.merges.current_docs"),
'indices.merges.current-size':
Stat("gauge", "nodes.%s.indices.merges.current_size_in_bytes"),
'indices.merges.total':
Stat("counter", "nodes.%s.indices.merges.total"),
'indices.merges.total-docs':
Stat("gauge", "nodes.%s.indices.merges.total_docs"),
'indices.merges.total-size':
Stat("counter", "nodes.%s.indices.merges.total_size_in_bytes"),
'indices.merges.time':
Stat("counter", "nodes.%s.indices.merges.total_time_in_millis"),
# REFRESH
'indices.refresh.total':
Stat("counter", "nodes.%s.indices.refresh.total"),
'indices.refresh.time':
Stat("counter", "nodes.%s.indices.refresh.total_time_in_millis"),
# SEGMENTS
'indices.segments.count':
Stat("gauge", "nodes.%s.indices.segments.count"),
'indices.segments.size':
Stat("gauge", "nodes.%s.indices.segments.memory_in_bytes"),
'indices.segments.index-writer-max-size':
Stat("gauge",
"nodes.%s.indices.segments.index_writer_max_memory_in_bytes"),
'indices.segments.index-writer-size':
Stat("gauge",
"nodes.%s.indices.segments.index_writer_memory_in_bytes"),
# DOCS
'indices.docs.count':
Stat("gauge", "nodes.%s.indices.docs.count"),
'indices.docs.deleted':
Stat("gauge", "nodes.%s.indices.docs.deleted"),
# STORE
'indices.store.size':
Stat("gauge", "nodes.%s.indices.store.size_in_bytes"),
# INDEXING
'indices.indexing.index-total':
Stat("counter", "nodes.%s.indices.indexing.index_total"),
'indices.indexing.index-time':
Stat("counter", "nodes.%s.indices.indexing.index_time_in_millis"),
'indices.indexing.delete-total':
Stat("counter", "nodes.%s.indices.indexing.delete_total"),
'indices.indexing.delete-time':
Stat("counter", "nodes.%s.indices.indexing.delete_time_in_millis"),
'indices.indexing.index-current':
Stat("gauge", "nodes.%s.indices.indexing.index_current"),
'indices.indexing.delete-current':
Stat("gauge", "nodes.%s.indices.indexing.delete_current"),
# GET
'indices.get.total':
Stat("counter", "nodes.%s.indices.get.total"),
'indices.get.time':
Stat("counter", "nodes.%s.indices.get.time_in_millis"),
'indices.get.exists-total':
Stat("counter", "nodes.%s.indices.get.exists_total"),
'indices.get.exists-time':
Stat("counter", "nodes.%s.indices.get.exists_time_in_millis"),
'indices.get.missing-total':
Stat("counter", "nodes.%s.indices.get.missing_total"),
'indices.get.missing-time':
Stat("counter", "nodes.%s.indices.get.missing_time_in_millis"),
'indices.get.current':
Stat("gauge", "nodes.%s.indices.get.current"),
# SEARCH
'indices.search.query-current':
Stat("gauge", "nodes.%s.indices.search.query_current"),
'indices.search.query-total':
Stat("counter", "nodes.%s.indices.search.query_total"),
'indices.search.query-time':
Stat("counter", "nodes.%s.indices.search.query_time_in_millis"),
'indices.search.fetch-current':
Stat("gauge", "nodes.%s.indices.search.fetch_current"),
'indices.search.fetch-total':
Stat("counter", "nodes.%s.indices.search.fetch_total"),
'indices.search.fetch-time':
Stat("counter", "nodes.%s.indices.search.fetch_time_in_millis"),
# JVM METRICS #
# MEM
'jvm.mem.heap-committed':
Stat("gauge", "nodes.%s.jvm.mem.heap_committed_in_bytes"),
'jvm.mem.heap-used':
Stat("gauge", "nodes.%s.jvm.mem.heap_used_in_bytes"),
'jvm.mem.heap-used-percent':
Stat("percent", "nodes.%s.jvm.mem.heap_used_percent"),
'jvm.mem.non-heap-committed':
Stat("gauge", "nodes.%s.jvm.mem.non_heap_committed_in_bytes"),
'jvm.mem.non-heap-used':
Stat("gauge", "nodes.%s.jvm.mem.non_heap_used_in_bytes"),
'jvm.mem.pools.young.max_in_bytes':
Stat("gauge", "nodes.%s.jvm.mem.pools.young.max_in_bytes"),
'jvm.mem.pools.young.used_in_bytes':
Stat("gauge", "nodes.%s.jvm.mem.pools.young.used_in_bytes"),
'jvm.mem.pools.old.max_in_bytes':
Stat("gauge", "nodes.%s.jvm.mem.pools.old.max_in_bytes"),
'jvm.mem.pools.old.used_in_bytes':
Stat("gauge", "nodes.%s.jvm.mem.pools.old.used_in_bytes"),
# UPTIME
'jvm.uptime':
Stat("counter", "nodes.%s.jvm.uptime_in_millis"),
# THREADS
'jvm.threads.count':
Stat("gauge", "nodes.%s.jvm.threads.count"),
'jvm.threads.peak':
Stat("gauge", "nodes.%s.jvm.threads.peak_count"),
# TRANSPORT METRICS #
'transport.server_open':
Stat("gauge", "nodes.%s.transport.server_open"),
'transport.rx.count':
Stat("counter", "nodes.%s.transport.rx_count"),
'transport.rx.size':
Stat("counter", "nodes.%s.transport.rx_size_in_bytes"),
'transport.tx.count':
Stat("counter", "nodes.%s.transport.tx_count"),
'transport.tx.size':
Stat("counter", "nodes.%s.transport.tx_size_in_bytes"),
# HTTP METRICS #
'http.current_open':
Stat("gauge", "nodes.%s.http.current_open"),
'http.total_open':
Stat("counter", "nodes.%s.http.total_opened"),
# PROCESS METRICS #
'process.open_file_descriptors':
Stat("gauge", "nodes.%s.process.open_file_descriptors"),
'process.cpu.percent':
Stat("gauge", "nodes.%s.process.cpu.percent"),
'process.mem.share_in_bytes':
Stat("gauge", "nodes.%s.process.mem.share_in_bytes"),
}
# Deprecated node stats by first version in which they were removed
DEPRECATED_NODE_STATS = [
{
'major': 2,
'minor': 0,
'revision': 0,
'keys': ['process.mem.share_in_bytes'],
},
{
'major': 5,
'minor': 0,
'revision': 0,
'keys': ['indices.segments.index-writer-max-size']
}
]
# Deprecated thread pools by first version in which they were removed
DEPRECATED_THREAD_POOLS = [
{
'major': 2,
'minor': 0,
'revision': 0,
'keys': ['merge', 'optimize']
},
{
'major': 5,
'minor': 0,
'revision': 0,
'keys': ['suggest', 'percolate']
}
]
NODE_STATS_ES_2 = {
'indices.cache.filter.evictions':
Stat("counter", "nodes.%s.indices.query_cache.evictions"),
'indices.cache.filter.size':
Stat("gauge", "nodes.%s.indices.query_cache.cache_size"),
'indices.cache.filter.hit-count':
Stat("counter", "nodes.%s.indices.query_cache.hit_count"),
'indices.cache.filter.miss-count':
Stat("counter", "nodes.%s.indices.query_cache.miss_count"),
'indices.cache.filter.cache-count':
Stat("counter", "nodes.%s.indices.query_cache.cache_count"),
'indices.cache.filter.total-count':
Stat("counter", "nodes.%s.indices.query_cache.total_count"),
'indices.search.scroll-time':
Stat("counter", "nodes.%s.indices.search.scroll_time_in_millis"),
'indices.search.scroll.total':
Stat("counter", "nodes.%s.indices.search.scroll_total"),
'indices.search.scroll.current':
Stat("gauge", "nodes.%s.indices.search.scroll_current"),
}
# ElasticSearch 1.3.0
INDEX_STATS_ES_1_3 = {
# SEGMENTS
"indices[index={index_name}].primaries.segments.index-writer-memory":
Stat("gauge", "primaries.segments.index_writer_memory_in_bytes"),
"indices[index={index_name}].primaries.segments.version-map-memory":
Stat("gauge", "primaries.segments.version_map_memory_in_bytes"),
}
# ElasticSearch 1.1.0
INDEX_STATS_ES_1_1 = {
# SUGGEST
"indices[index={index_name}].primaries.suggest.total":
Stat("counter", "primaries.suggest.total"),
"indices[index={index_name}].primaries.suggest.time":
Stat("counter", "primaries.suggest.time_in_millis"),
"indices[index={index_name}].primaries.suggest.current":
Stat("gauge", "primaries.suggest.current"),
}
# ElasticSearch 1.0.0
INDEX_STATS = {
# PRIMARIES
# TRANSLOG
"indices[index={index_name}].primaries.translog.size":
Stat("gauge", "primaries.translog.size_in_bytes"),
"indices[index={index_name}].primaries.translog.operations":
Stat("counter", "primaries.translog.operations"),
# SEGMENTS
"indices[index={index_name}].primaries.segments.memory":
Stat("gauge", "primaries.segments.memory_in_bytes"),
"indices[index={index_name}].primaries.segments.count":
Stat("counter", "primaries.segments.count"),
# ID_CACHE
"indices[index={index_name}].primaries.id-cache.memory-size":
Stat("gauge", "primaries.id_cache.memory_size_in_bytes"),
# FLUSH
"indices[index={index_name}].primaries.flush.total":
Stat("counter", "primaries.flush.total"),
"indices[index={index_name}].primaries.flush.total-time":
Stat("counter", "primaries.flush.total_time_in_millis"),
# WARMER
"indices[index={index_name}].primaries.warmer.total.primaries.warmer"
".total-time": Stat(
"counter", "primaries.warmer.total_time_in_millis"),
"indices[index={index_name}].primaries.warmer.total":
Stat("counter", "primaries.warmer.total"),
"indices[index={index_name}].primaries.warmer.current":
Stat("gauge", "primaries.warmer.current"),
# FIELDDATA
"indices[index={index_name}].primaries.fielddata.memory-size": Stat(
"gauge",
"primaries.fielddata.memory_size_in_bytes"),
"indices[index={index_name}].primaries.fielddata.evictions": Stat(
"counter",
"primaries.fielddata.evictions"),
# REFRESH
"indices[index={index_name}].primaries.refresh.total-time":
Stat("counter", "primaries.refresh.total_time_in_millis"),
"indices[index={index_name}].primaries.refresh.total":
Stat("counter", "primaries.refresh.total"),
# MERGES
"indices[index={index_name}].primaries.merges.total-docs":
Stat("counter", "primaries.merges.total_docs"),
"indices[index={index_name}].primaries.merges.total-size":
Stat("bytes", "primaries.merges.total_size_in_bytes"),
"indices[index={index_name}].primaries.merges.current":
Stat("gauge", "primaries.merges.current"),
"indices[index={index_name}].primaries.merges.total":
Stat("counter", "primaries.merges.total"),
"indices[index={index_name}].primaries.merges.current-docs":
Stat("gauge", "primaries.merges.current_docs"),
"indices[index={index_name}].primaries.merges.total-time":
Stat("counter", "primaries.merges.total_time_in_millis"),
"indices[index={index_name}].primaries.merges.current-size":
Stat("gauge", "primaries.merges.current_size_in_bytes"),
# COMPLETION
"indices[index={index_name}].primaries.completion.size":
Stat("gauge", "primaries.completion.size_in_bytes"),
# PERCOLATE
"indices[index={index_name}].primaries.percolate.total":
Stat("counter", "primaries.percolate.total"),
"indices[index={index_name}].primaries.percolate.memory-size":
Stat("gauge", "primaries.percolate.memory_size_in_bytes"),
"indices[index={index_name}].primaries.percolate.queries":
Stat("counter", "primaries.percolate.queries"),
"indices[index={index_name}].primaries.percolate.time":
Stat("counter", "primaries.percolate.time_in_millis"),
"indices[index={index_name}].primaries.percolate.current":
Stat("gauge", "primaries.percolate.current"),
# FILTER_CACHE
"indices[index={index_name}].primaries.filter-cache.evictions":
Stat("counter", "primaries.filter_cache.evictions"),
"indices[index={index_name}].primaries.filter-cache.memory-size":
Stat("gauge", "primaries.filter_cache.memory_size_in_bytes"),
# DOCS
"indices[index={index_name}].primaries.docs.count":
Stat("gauge", "primaries.docs.count"),
"indices[index={index_name}].primaries.docs.deleted":
Stat("gauge", "primaries.docs.deleted"),
# STORE
"indices[index={index_name}].primaries.store.size":
Stat("gauge", "primaries.store.size_in_bytes"),
"indices[index={index_name}].primaries.store.throttle-time":
Stat("counter", "primaries.store.throttle_time_in_millis"),
# INDEXING
"indices[index={index_name}].primaries.indexing.index-total":
Stat("counter", "primaries.indexing.index_total"),
"indices[index={index_name}].primaries.indexing.index-time":
Stat("counter", "primaries.indexing.index_time_in_millis"),
"indices[index={index_name}].primaries.indexing.index-current":
Stat("gauge", "primaries.indexing.index_current"),
"indices[index={index_name}].primaries.indexing.delete-total":
Stat("counter", "primaries.indexing.delete_total"),
"indices[index={index_name}].primaries.indexing.delete-time":
Stat("counter", "primaries.indexing.delete_time_in_millis"),
"indices[index={index_name}].primaries.indexing.delete-current":
Stat("gauge", "primaries.indexing.delete_current"),
# GET
"indices[index={index_name}].primaries.get.time":
Stat("counter", "primaries.get.time_in_millis"),
"indices[index={index_name}].primaries.get.exists-total":
Stat("counter", "primaries.get.exists_total"),
"indices[index={index_name}].primaries.get.exists-time":
Stat("counter", "primaries.get.exists_time_in_millis"),
"indices[index={index_name}].primaries.get.missing-total":
Stat("counter", "primaries.get.missing_total"),
"indices[index={index_name}].primaries.get.missing-time":
Stat("counter", "primaries.get.missing_time_in_millis"),
"indices[index={index_name}].primaries.get.current":
Stat("gauge", "primaries.get.current"),
# SEARCH
"indices[index={index_name}].primaries.search.open-contexts":
Stat("gauge", "primaries.search.open_contexts"),
"indices[index={index_name}].primaries.search.query-total":
Stat("counter", "primaries.search.query_total"),
"indices[index={index_name}].primaries.search.query-time":
Stat("counter", "primaries.search.query_time_in_millis"),
"indices[index={index_name}].primaries.search.query-current":
Stat("gauge", "primaries.search.query_current"),
"indices[index={index_name}].primaries.search.fetch-total":
Stat("counter", "primaries.search.fetch_total"),
"indices[index={index_name}].primaries.search.fetch-time":
Stat("counter", "primaries.search.fetch_time_in_millis"),
"indices[index={index_name}].primaries.search.fetch-current":
Stat("gauge", "primaries.search.fetch_current"),
# TOTAL #
# DOCS
"indices[index={index_name}].total.docs.count":
Stat("gauge", "total.docs.count"),
"indices[index={index_name}].total.docs.deleted":
Stat("gauge", "total.docs.deleted"),
# STORE
"indices[index={index_name}].total.store.size":
Stat("gauge", "total.store.size_in_bytes"),
"indices[index={index_name}].total.store.throttle-time":
Stat("counter", "total.store.throttle_time_in_millis"),
# INDEXING
"indices[index={index_name}].total.indexing.index-total":
Stat("counter", "total.indexing.index_total"),
"indices[index={index_name}].total.indexing.index-time":
Stat("counter", "total.indexing.index_time_in_millis"),
"indices[index={index_name}].total.indexing.index-current":
Stat("gauge", "total.indexing.index_current"),
"indices[index={index_name}].total.indexing.delete-total":
Stat("counter", "total.indexing.delete_total"),
"indices[index={index_name}].total.indexing.delete-time":
Stat("counter", "total.indexing.delete_time_in_millis"),
"indices[index={index_name}].total.indexing.delete-current":
Stat("gauge", "total.indexing.delete_current"),
# GET
"indices[index={index_name}].total.get.total":
Stat("counter", "total.get.total"),
"indices[index={index_name}].total.get.time":
Stat("counter", "total.get.time_in_millis"),
"indices[index={index_name}].total.get.exists-total":
Stat("counter", "total.get.exists_total"),
"indices[index={index_name}].total.get.exists-time":
Stat("counter", "total.get.exists_time_in_millis"),
"indices[index={index_name}].total.get.missing-total":
Stat("counter", "total.get.missing_total"),
"indices[index={index_name}].total.get.missing-time":
Stat("counter", "total.get.missing_time_in_millis"),
"indices[index={index_name}].total.get.current":
Stat("gauge", "total.get.current"),
# SEARCH
"indices[index={index_name}].total.search.open-contexts":
Stat("gauge", "total.search.open_contexts"),
"indices[index={index_name}].total.search.query-total":
Stat("counter", "total.search.query_total"),
"indices[index={index_name}].total.search.query-time":
Stat("counter", "total.search.query_time_in_millis"),
"indices[index={index_name}].total.search.query-current":
Stat("gauge", "total.search.query_current"),
"indices[index={index_name}].total.search.fetch-total":
Stat("counter", "total.search.fetch_total"),
# MERGES
"indices[index={index_name}].total.merges.total-docs":
Stat("counter", "total.merges.total_docs"),
"indices[index={index_name}].total.merges.total-size":
Stat("bytes", "total.merges.total_size_in_bytes"),
"indices[index={index_name}].total.merges.current":
Stat("gauge", "total.merges.current"),
"indices[index={index_name}].total.merges.total":
Stat("counter", "total.merges.total"),
"indices[index={index_name}].total.merges.current-docs":
Stat("gauge", "total.merges.current_docs"),
"indices[index={index_name}].total.merges.total-time":
Stat("counter", "total.merges.total_time_in_millis"),
"indices[index={index_name}].total.merges.current-size":
Stat("gauge", "total.merges.current_size_in_bytes"),
# FILTER_CACHE
"indices[index={index_name}].total.filter-cache.evictions":
Stat("counter", "total.filter_cache.evictions"),
"indices[index={index_name}].total.filter-cache.memory-size":
Stat("gauge", "total.filter_cache.memory_size_in_bytes"),
# FIELDDATA
"indices[index={index_name}].total.fielddata.memory-size":
Stat("gauge", "total.fielddata.memory_size_in_bytes"),
"indices[index={index_name}].total.fielddata.evictions":
Stat("counter", "total.fielddata.evictions"),
}
# ElasticSearch cluster stats (1.0.0 and later)
CLUSTER_STATS = {
'cluster.active-primary-shards': Stat("gauge", "active_primary_shards"),
'cluster.active-shards': Stat("gauge", "active_shards"),
'cluster.initializing-shards': Stat("gauge", "initializing_shards"),
'cluster.number-of-data_nodes': Stat("gauge", "number_of_data_nodes"),
'cluster.number-of-nodes': Stat("gauge", "number_of_nodes"),
'cluster.relocating-shards': Stat("gauge", "relocating_shards"),
'cluster.unassigned-shards': Stat("gauge", "unassigned_shards"),
'cluster.status': Stat("gauge", "status"),
}
# Thread pool metrics
THREAD_POOL_METRICS = {
"gauge": ['threads', 'queue', 'active', 'largest'],
"counter": ['completed', 'rejected'],
}
def first_key(d):
"""Extract the first key from a dict"""
return list(d.keys())[0]
# collectd callbacks
def read_callback():
"""called by collectd to gather stats. It is called per collection
interval.
If this method throws, the plugin will be skipped for an increasing amount
of time until it returns normally again"""
log.info('Read callback called')
for c in CLUSTERS:
c.fetch_stats()
def str_to_bool(value):
"""Python 2.x does not have a casting mechanism for booleans. The built in
bool() will return true for any string with a length greater than 0. It
does not cast a string with the text "true" or "false" to the
corresponding bool value. This method is a casting function. It is
insensitive to case and leading/trailing spaces. An Exception is raised
if a cast can not be made.
"""
if str(value).strip().lower() == "true":
return True
elif str(value).strip().lower() == "false":
return False
else:
raise Exception("Unable to cast value (%s) to boolean" % value)
def configure_callback(conf):
"""called by collectd to configure the plugin. This is called only once"""
c = Cluster()
for node in conf.children:
if node.key == 'Host':
c.es_host = node.values[0]
elif node.key == 'Port':
c.es_port = int(node.values[0])
elif node.key == 'Protocol':
c.es_url_scheme = node.values[0]
log.notice(
'overriding elasticsearch url scheme to %s' % c.es_url_scheme)
elif node.key == 'Username':
c.es_username = node.values[0]
elif node.key == 'Password':
c.es_password = node.values[0]
elif node.key == 'Verbose':
handle.verbose = str_to_bool(node.values[0])
elif node.key == 'Cluster':
c.es_cluster = node.values[0]
log.notice(
'overriding elasticsearch cluster name to %s' % c.es_cluster)
elif node.key == 'Version':
c.es_version = node.values[0]
log.notice(
'overriding elasticsearch version number to %s' % c.es_version)
elif node.key == 'Indexes':
c.es_index = node.values
elif node.key == 'EnableIndexStats':
c.enable_index_stats = str_to_bool(node.values[0])
elif node.key == 'EnableClusterHealth':
c.enable_cluster_stats = str_to_bool(node.values[0])
elif node.key == 'Interval':
c.collection_interval = int(node.values[0])
elif node.key == 'IndexInterval':
c.index_interval = int(node.values[0])
elif node.key == "DetailedMetrics":
c.detailed_metrics = str_to_bool(node.values[0])
elif node.key == "IndexSummaryOnly":
c.index_summary_only = str_to_bool(node.values[0])
elif node.key == "ThreadPools":
for thread_pool in node.values:
c.configured_thread_pools.add(thread_pool)
# Include required thread pools (search and index)
c.configured_thread_pools.add('search')
c.configured_thread_pools.add('index')
elif node.key == "AdditionalMetrics":
for metric_name in node.values:
c.defaults.add(metric_name)
elif node.key == "IndexStatsMasterOnly":
c.master_only = str_to_bool(node.values[0])
elif node.key == "Dimensions":
c.extra_dimensions = node.values[0]
else:
log.warning('Unknown config key: %s.' % node.key)
log.info('host: %s' % c.es_host)
log.info('port: %s' % c.es_port)
log.info('es_index: %s' % c.es_index)
log.info('enable_index_stats: %s' % c.enable_index_stats)
log.info('enable_cluster_stats: %s' % c.enable_cluster_stats)
log.info('self.collection_interval: %s' % c.collection_interval)
log.info('index_interval: %s' % c.index_interval)
log.info('detailed_metrics: %s' % c.detailed_metrics)
log.info('index_summary_only: %s' % c.index_summary_only)
log.info('configured_thread_pools: %s' % c.configured_thread_pools)
log.info('metrics to collect: %s' % c.defaults)
log.info('master_only: %s' % c.master_only)
# determine node information
c.load_es_info()
# initialize stats map based on ES version
c.init_stats()
# add the cluster config to the list of clusters to monitor
CLUSTERS.append(c)
# register the read callback now that we have the complete config
collectd.register_read(read_callback, interval=c.collection_interval)
log.notice(
'started elasticsearch plugin with interval = %d seconds' %
c.collection_interval)
def remove_deprecated_elements(deprecated, elements, version):
"""Remove deprecated items from a list or dictionary"""
# Attempt to parse the major, minor, and revision
(major, minor, revision) = version.split('.')
major, minor = int(major), int(minor)
# Sanitize alphas and betas from revision number
revision = int(revision.split('-')[0])
# Iterate over deprecation lists and remove any keys that were deprecated
# prior to the current version
for dep in deprecated:
if (major >= dep['major']) \
or (major == dep['major'] and minor >= dep['minor']) \
or (major == dep['major'] and minor == dep['minor']
and revision >= dep['revision']):
if type(elements) is list:
for key in dep['keys']:
if key in elements:
elements.remove(key)
if type(elements) is dict:
for key in dep['keys']:
if key in elements:
del elements[key]
return elements
class Cluster(object):
def __init__(self):
self.collection_interval = 10
self.es_host = "localhost"
self.es_port = 9200
self.es_url_scheme = "http"
self.es_username = ""
self.es_password = ""
self.es_cluster = None
self.es_version = None
self.es_index = []
self.enable_index_stats = True
self.enable_cluster_stats = True
self.index_interval = 300
self.detailed_metrics = True
self.configured_thread_pools = set()
self.defaults = DEFAULTS
self.master_only = False
self.index_summary_only = False
self.node_stats_cur = {}
self.index_stats_cur = {}
self.cluster_stats_cur = {}
self.index_skip = 0
self.skip_count = 0
self.es_master_eligible = None
self.es_node_url = ""
self.es_cluster_url = ""
self.es_index_url = ""
self.thread_pools = []
self.es_current_master = False
self.node_id = None
self.extra_dimensions = ''
def sanatize_intervals(self):
"""Sanitizes the index interval to be greater or equal to and divisible
by the collection interval
"""
# Sanitize the self.collection_interval and self.index_interval
# ? self.index_interval > self.collection_interval:
# check if self.index_interval is divisible by self.collection_interval
if self.index_interval > self.collection_interval:
# ? self.index_interval % self.collection_interval > 0:
# round the self.index_interval up to a compatible value
if self.index_interval % self.collection_interval > 0:
self.index_interval = self.index_interval + \
self.collection_interval - \
(self.index_interval %
self.collection_interval)
log.warning(('The Elasticsearch Index Interval must be '
'greater or equal to than and divisible by the '
'collection Interval. The Elasticsearch Index '
'Interval has been rounded to: %s') %
self.index_interval)
# ? self.index_interval < self.collection_interval :
# Set self.index_interval = self.collection_interval
elif self.index_interval < self.collection_interval:
self.index_interval = self.collection_interval
log.warning(('WARN: The Elasticsearch Index Interval must be '
'greater or equal to than and divisible by the '
'collection Interval. The Elasticsearch Index '
'Interval has been rounded to: %s') %
self.index_interval)
# self.index_skip = self.index_interval / self.collection_interval
self.index_skip = (self.index_interval / self.collection_interval)
# ENSURE INDEX IS COLLECTED ON THE FIRST COLLECTION
self.skip_count = self.index_skip
def remove_deprecated_node_stats(self):
"""Remove deprecated node stats from the list of stats to collect"""
self.node_stats_cur = remove_deprecated_elements(DEPRECATED_NODE_STATS,
self.node_stats_cur,
self.es_version)
def remove_deprecated_threads(self):
"""Remove deprecated thread_pools from the list of stats to collect"""
self.thread_pools = remove_deprecated_elements(DEPRECATED_THREAD_POOLS,
self.thread_pools,
self.es_version)
# helper methods
def init_stats(self):
self.sanatize_intervals()
self.es_node_url = self.es_url_scheme + "://" + self.es_host + ":" + \
str(self.es_port) + \
("/_nodes/_local/stats/transport,http,process,jvm,indices,"
"thread_pool")
self.node_stats_cur = dict(NODE_STATS.items())
self.index_stats_cur = dict(INDEX_STATS.items())
if not self.es_version.startswith("1."):
self.node_stats_cur.update(NODE_STATS_ES_2)
self.remove_deprecated_node_stats()
if self.es_version.startswith("1.1") \
or self.es_version.startswith("1.2"):
self.index_stats_cur.update(INDEX_STATS_ES_1_1)
else:
# 1.3 and higher
self.index_stats_cur.update(INDEX_STATS_ES_1_1)
self.index_stats_cur.update(INDEX_STATS_ES_1_3)
# version agnostic settings
if not self.es_index:
# get all index stats
self.es_index_url = self.es_url_scheme + "://" + self.es_host + \
":" + str(self.es_port) + "/_all/_stats"
else:
self.es_index_url = self.es_url_scheme + "://" + self.es_host + \
":" + str(self.es_port) + "/" + \
",".join(self.es_index) + "/_stats"
# common thread pools for all ES versions
thread_pools = ['generic', 'index', 'get', 'snapshot', 'bulk',
'warmer', 'flush', 'search', 'refresh']
# Add the 1.0 metrics
if not self.es_version.startswith("0."):
thread_pools.extend(['merge', 'optimize'])
# Add the 2.0 metrics
if not self.es_version.startswith("1."):
thread_pools.extend(['suggest', 'percolate', 'management',
'listener', 'fetch_shard_store',
'fetch_shard_started'])
# Add the 2.1 metrics
if not self.es_version.startswith("1.") \
and not self.es_version.startswith("2.0"):
thread_pools.extend(['force_merge'])
# Legacy support for old configurations without Thread Pools config
if len(self.configured_thread_pools) == 0:
self.thread_pools = list(self.configured_thread_pools)
else:
# Filter out the thread pools that aren't specified by user
self.thread_pools = filter(lambda pool: pool in
self.configured_thread_pools,
thread_pools)
self.remove_deprecated_threads()
self.es_cluster_url = self.es_url_scheme + "://" + self.es_host + \
":" + str(self.es_port) + "/_cluster/health"
log.notice('Initialized with version=%s, host=%s, port=%s, url=%s' %
(self.es_version, self.es_host, self.es_port,
self.es_node_url))
# FUNCTION: Collect node stats from JSON result
def lookup_node_stat(self, stat, json):
node = first_key(json['nodes'])
val = dig_it_up(json, self.node_stats_cur[stat].path % node)
# Check to make sure we have a valid result
# dig_it_up returns False if no match found
if not isinstance(val, bool):
return int(val)
else:
return None
def fetch_stats(self):
"""
fetches all required stats from ElasticSearch. This method also sets
self.es_cluster
"""
node_json_stats = self.fetch_url(self.es_node_url)
if node_json_stats:
if self.es_cluster is None:
self.es_cluster = node_json_stats['cluster_name']
else:
log.info('Configured with cluster_json_stats=%s' %
self.es_cluster)
log.info('Parsing node_json_stats')
self.parse_node_stats(node_json_stats, self.node_stats_cur)
log.info('Parsing thread pool stats')
self.parse_thread_pool_stats(node_json_stats, self.thread_pools)
# check the current master
self.detect_es_master()
# load cluster and index stats only on master eligible nodes, this
# avoids collecting too many metrics if the cluster has a lot of nodes
if self.enable_cluster_stats and self.es_master_eligible:
cluster_json_stats = self.fetch_url(self.es_cluster_url)
log.info('Parsing cluster stats')
self.parse_cluster_stats(cluster_json_stats, CLUSTER_STATS)
if (self.enable_index_stats and self.es_master_eligible and
self.skip_count >= self.index_skip) \
and ((self.master_only and self.es_current_master)
or (not self.master_only)):
# Reset skip count
self.skip_count = 0
indices = self.fetch_url(self.es_index_url)
if indices:
if self.index_summary_only:
log.info('Parsing index stats for _all summary')
self.parse_index_stats(indices['_all'], '_all')
else:
indexes_json_stats = indices['indices']
for index_name in indexes_json_stats.keys():
log.info('Parsing index stats for index: %s' %
index_name)
self.parse_index_stats(indexes_json_stats[index_name],
index_name)
# Increment skip count
self.skip_count += 1
def fetch_url(self, url):
response = None
try:
log.info('Fetching api information from: %s' % url)
request = Request(url)
if self.es_username:
authheader = base64.encodestring('%s:%s' %
(self.es_username,
self.es_password)
).replace('\n', '')
request.add_header("Authorization", "Basic %s" % authheader)
ctx = None
if self.es_url_scheme == "https":
ctx = ssl._create_unverified_context()
response = urlopen(request, context=ctx, timeout=10)
else:
response = urlopen(request, timeout=10)
log.info('Raw api response: %s' % response)
return json.load(response)
except (URLError, HTTPError) as e:
log.error('Error connecting to %s - %r : %s' %
(url, e, e))
return None
finally:
if response is not None:
response.close()
def load_es_info(self):
json = self.fetch_url(self.es_url_scheme + "://" + self.es_host + ":" +
str(self.es_port) + "/_nodes/_local")
if json is None:
# assume some sane defaults
if self.es_version is None:
self.es_version = "1.0.0"
if self.es_cluster is None:
self.es_cluster = "elasticsearch"
self.es_master_eligible = True
log.warning('Unable to determine node information, defaulting to \
version %s, cluster %s and master %s' %
(self.es_version, self.es_cluster,
self.es_master_eligible))
return
# Identify the current node