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Fetch cluster stats, simplify n_mnodes calculation. #33

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Fetch cluster stats, simplify n_mnodes calculation. #33

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32 changes: 6 additions & 26 deletions check_elasticsearch
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,11 @@ class ElasticSearchCheck(NagiosCheck):
es_state = get_json(r'http://%s:%d/%s_cluster/state' %
(host, port, prefix))

# Request cluster 'stats'. We're primarily interested in the
# node counts.
es_clusterstats = get_json(r'http://%s:%d/%s_cluster/stats' %
(host, port, prefix))

# Request a bunch of useful numbers that we export as perfdata.
# Details like the number of get, search, and indexing
# operations come from here.
Expand All @@ -154,32 +159,7 @@ class ElasticSearchCheck(NagiosCheck):

n_nodes = es_health['number_of_nodes']
n_dnodes = es_health['number_of_data_nodes']

# Unlike n_dnodes (the number of data nodes), we must compute
# the number of master-eligible nodes ourselves.
n_mnodes = 0
for esid in es_state['nodes']:
master_elig = True

# ES will never elect 'client' nodes as masters.
try:
master_elig = not (booleanise(
es_state['nodes'][esid]['attributes']
['client']))
except KeyError, e:
if e.args[0] != 'client':
raise

try:
master_elig = (booleanise(
es_state['nodes'][esid]['attributes']
['master']))
except KeyError, e:
if e.args[0] != 'master':
raise

if master_elig:
n_mnodes += 1
n_mnodes = es_clusterstats['nodes']['count']['master_only'] + es_clusterstats['nodes']['count']['master_data']

n_active_shards = es_health['active_shards']
n_relocating_shards = es_health['relocating_shards']
Expand Down