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Add support for cluster health #22

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Add support for cluster health #22

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add6ab6
Add health information for cluster and number of nodes
cristi- Jun 8, 2015
800d184
Add health information for cluster and number of nodes
cristi- Jun 8, 2015
b4bd399
Add support for cluster health
cristi- Jun 12, 2015
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27 changes: 26 additions & 1 deletion elasticsearch.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,12 +28,25 @@
ES_URL = ""
VERBOSE_LOGGING = False

#health mapping
health = {
'green' : 0,
'yellow': 1,
'red': 2,
}
UNKNOWN = 3


Stat = collections.namedtuple('Stat', ('type', 'path'))

STATS_CUR = {}

# DICT: ElasticSearch 1.0.0
STATS_ES1 = {
## ES HEALTH
'health.status': Stat("gauge", "nodes.%s.health.status"),
'health.number_of_nodes': Stat("gauge", "nodes.%s.health.number_of_nodes"),

## STORE
'indices.store.throttle-time': Stat("counter", "nodes.%s.indices.store.throttle_time_in_millis"),

Expand Down Expand Up @@ -160,7 +173,7 @@ def lookup_stat(stat, json):

def configure_callback(conf):
"""Received configuration information"""
global ES_HOST, ES_PORT, ES_URL, ES_VERSION, VERBOSE_LOGGING, STATS_CUR
global ES_HOST, ES_PORT, ES_URL, ES_URL2, ES_VERSION, VERBOSE_LOGGING, STATS_CUR
for node in conf.children:
if node.key == 'Host':
ES_HOST = node.values[0]
Expand All @@ -177,9 +190,11 @@ def configure_callback(conf):
% node.key)
if ES_VERSION == "1.0":
ES_URL = "http://" + ES_HOST + ":" + str(ES_PORT) + "/_nodes/_local/stats/transport,http,process,jvm,indices,thread_pool"
ES_URL2 = "http://" + ES_HOST + ":" + str(ES_PORT) + "/_cluster/health"
STATS_CUR = dict(STATS.items() + STATS_ES1.items())
else:
ES_URL = "http://" + ES_HOST + ":" + str(ES_PORT) + "/_cluster/nodes/_local/stats?http=true&process=true&jvm=true&transport=true&thread_pool=true"
ES_URL2 = "http://" + ES_HOST + ":" + str(ES_PORT) + "/_cluster/health"
STATS_CUR = dict(STATS.items() + STATS_ES09.items())

# add info on thread pools
Expand All @@ -199,6 +214,7 @@ def fetch_stats():

try:
result = json.load(urllib2.urlopen(ES_URL, timeout=10))
result['nodes'][result['nodes'].keys()[0]]['health'] = process_health(ES_URL2)
except urllib2.URLError, e:
collectd.error('elasticsearch plugin: Error connecting to %s - %r' % (ES_URL, e))
return None
Expand All @@ -214,6 +230,15 @@ def parse_stats(json):
result = lookup_stat(name, json)
dispatch_stat(result, name, key)

def process_health(url):
"""Read a the health status from url, map health to an integer and return the json"""
try:
result = json.load(urllib2.urlopen(url, timeout=10))
result['status'] = health[result['status']] if result['status'] in health else UNKNOWN
except urllib2.URLError, e:
collectd.error('elasticsearch plugin: Error connecting to %s - %r' % (ES_URL, e))
return None
return result

def dispatch_stat(result, name, key):
"""Read a key from info response data and dispatch a value"""
Expand Down