Created
September 12, 2013 13:02
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A simple python script for checking status of a SolrCloud instance using Nagios
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#!/usr/bin/python2.7 | |
""" | |
check_solr_cloud.py | |
Nagios plugin for checking the status of a SolrCloud instance by | |
examining the clusterstate.json file on zookeeper. | |
Usage: | |
check_solr_cloud.py --zkhosts=<zookeeper hosts> --collection=<collection> | |
zkhosts: Comma-delimited list of zookeeper hosts with port numbers | |
collection: Solr collection to check | |
""" | |
import argparse | |
import json | |
import kazoo.client | |
import sys | |
# At least 1 active node per shard | |
# Only 1 active leader per shard | |
# Leader is active | |
# Config | |
ZK_HOSTS = 'localhost:9001' | |
SOLR_INDEX = 'index' | |
# Exit codes | |
STATE_OK = 0 | |
STATE_WARNING = 1 | |
STATE_CRITICAL = 2 | |
STATE_UNKNOWN = 3 | |
STATE_STR_OK = 'SOLR CLOUD OK' | |
STATE_STR_WARNING = 'SOLR CLOUD WARNING' | |
STATE_STR_CRITICAL = 'SOLR CLOUD CRITICAL' | |
STATE_STR_UNKNOWN = 'SOLR CLOUD UNKNOWN' | |
def exit_ok(message=None): | |
if message: | |
print "%s: %s" % (STATE_STR_OK, message) | |
else: | |
print STATE_STR_OK | |
sys.exit(STATE_OK) | |
def exit_warning(message): | |
print "%s: %s" % (STATE_STR_WARNING, message) | |
sys.exit(STATE_WARNING) | |
def exit_critical(message): | |
print "%s: %s" % (STATE_STR_CRITICAL, message) | |
sys.exit(STATE_CRITICAL) | |
def main(zk_host, collection): | |
try: | |
zk_client = kazoo.client.KazooClient(hosts=zk_host, read_only=True) | |
zk_client.start(timeout=5) | |
except kazoo.handlers.threading.TimeoutError: | |
exit_critical("Unable to connect to zookeeper hosts") | |
try: | |
cluster_state_str = zk_client.get('/clusterstate.json')[0] | |
except kazoo.exceptions.NoNodeError: | |
exit_critical("clusterstate.json file missing from zookeeper") | |
cluster_state = json.loads(cluster_state_str) | |
for shard, shard_data in cluster_state[collection]['shards'].iteritems(): | |
at_least_one_active_node = False | |
one_leader = False | |
for replica, replica_data in shard_data['replicas'].iteritems(): | |
if replica_data['state'] == 'active': | |
at_least_one_active_node = True | |
if 'leader' in replica_data and replica_data['leader'] == 'true': | |
if one_leader: | |
exit_critical("More than one leader for shard: %s" % shard) | |
else: | |
one_leader = True | |
if not at_least_one_active_node: | |
exit_critical("No active nodes for shard: %s" % shard) | |
if not one_leader: | |
exit_critical("No leader for shard: %s" % shard) | |
zk_client.stop() | |
exit_ok() | |
if __name__ == "__main__": | |
parser = argparse.ArgumentParser() | |
parser.add_argument('--zkhosts', required=True) | |
parser.add_argument('--collection', required=True) | |
args = parser.parse_args() | |
main(args.zkhosts, args.collection) |
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