/
agent.py
289 lines (245 loc) · 9.93 KB
/
agent.py
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import sys
import yaml
from elasticsearch import Elasticsearch
import psutil
import copy
from datetime import datetime
import socket
import logging
from apscheduler.schedulers.blocking import BlockingScheduler
from apscheduler.executors.pool import ThreadPoolExecutor
import re
class SimpleReader(object):
'''
Base class that hold elasticsearch connections and basic functionality
'''
def __init__(self, config):
self.target = Elasticsearch(config.get_elastic_target_host())
self.source = Elasticsearch(config.get_elastic_source_host())
def calculate_difference(self, data, prev, parent_key):
for k in data[parent_key]:
data[parent_key][k] = data[parent_key][k] - prev[parent_key][k]
class ElasticStatsReader(SimpleReader):
last_doc_query = {"size": 1, "query": {"match_all": {}}, "sort": [{"@timestamp": {"order": "desc"}}]}
name_replace_regex = r"[.|\s]+"
def __init__(self, config):
super(ElasticStatsReader, self).__init__(config)
self.index = conf.get_target_index_name()
self.type = 'nodestat'
self.deltas = config.get_delta_fields()
self.name_expression = config.get_name_expression()
def read(self):
#print self.source.cluster.stats()
nodes = self.source.nodes.stats()
return self.calculate_document(nodes['nodes'])
def write(self, document):
print self.target.index(self.index, self.type, document)
def run(self):
self.write(self.read())
def get_value_for_delta(self, delta, document):
value = document
fields = delta.split('.')
for f in fields:
if f in value:
if not isinstance(value[f], dict):
return value[f]
else:
value = value[f]
raise KeyError(delta + ' is not valid sequence')
def append_delta(self, document, delta, value):
arr = delta.split('.')
tmp = document
for d in arr:
if d != arr[-1]:
tmp[d] = {}
tmp = tmp[d]
else:
tmp[d] = value
def calculate_deltas(self, document):
try:
latest_document = self.target.search(self.index, body=ElasticStatsReader.last_doc_query)
except Exception, e:
return
if latest_document['hits']['total'] > 0:
latest_document = latest_document['hits']['hits'][0]['_source']
for d in self.deltas:
for node_key in document:
if node_key != '@timestamp':
if not 'delta' in document[node_key]:
document[node_key]['delta'] = {}
doc_delta_value = self.get_value_for_delta(d, document[node_key])
latest_delta_value = self.get_value_for_delta(d, latest_document[node_key])
self.append_delta(document[node_key]['delta'], d, (doc_delta_value - latest_delta_value))
def calculate_document(self, nodes):
document = {
'@timestamp': datetime.utcnow()
}
if self.name_expression:
for k in nodes:
name = re.sub(ElasticStatsReader.name_replace_regex, '_', nodes[k][self.name_expression])
document[name] = nodes[k]
else:
for k in nodes:
document[k] = nodes[k]
if self.deltas:
self.calculate_deltas(document)
return document
class SystemStatsReader(SimpleReader):
def __init__(self, config):
logging.getLogger('apscheduler.scheduler').info('execute reader constructor')
super(SystemStatsReader, self).__init__(config)
self.config = config
self.logger = logging.getLogger('system.reader')
self.logger.setLevel(config.get_logging_level())
self.previouse = None
def read_data(self):
cpu = psutil.cpu_times()
vm = psutil.virtual_memory()
swm = psutil.swap_memory()
dio = psutil.disk_io_counters()
nio = psutil.net_io_counters(pernic=False)
return {
'host': socket.gethostname(),
'cpu': {
'user': cpu.user,
'nice': cpu.nice,
'system': cpu.system,
'idle': cpu.idle,
'iowait': cpu.iowait,
'irq': cpu.irq,
'softirq': cpu.softirq,
'steal': cpu.steal,
'guest': cpu.guest,
'guest_nice': cpu.guest_nice
},
'mem': {
'virtual': {
'total': vm.total,
'available': vm.available,
'percent': vm.percent,
'used': vm.used,
'free': vm.free,
'active': vm.active,
'inactive': vm.inactive,
'buffers': vm.buffers,
'cached': vm.cached,
'shared': vm.shared
},
'swap': {
'total': swm.total,
'used': swm.used,
'free': swm.free,
'percent': swm.percent,
'sin': swm.sin,
'sout': swm.sout
}
},
'diskio': {
'read_count': dio.read_count,
'write_count': dio.write_count,
'read_bytes': dio.read_bytes,
'write_bytes': dio.write_bytes,
'read_time': dio.read_time,
'write_time': dio.write_time,
'read_merged_count': dio.read_merged_count,
'write_merged_count': dio.write_merged_count,
'busy_time': dio.busy_time
},
"netio": {
'bytes_sent': nio.bytes_sent,
'bytes_recv': nio.bytes_recv,
'packets_sent': nio.packets_sent,
'packets_recv': nio.packets_recv,
'errin': nio.errin,
'errout': nio.errout,
'dropin': nio.dropin,
'dropout': nio.dropout
}
}
def index_data(self):
data = self.read_data()
if self.previouse == None:
self.previouse = copy.deepcopy(data)
else:
index_data = self.merge(data)
index_data['@timestamp'] = datetime.utcnow()
self.logger.info(str(self.target.index(self.config.get_target_index_name(), self.config.get_target_system_type(), index_data)))
def merge(self, data):
prev = copy.deepcopy(self.previouse)
self.previouse = copy.deepcopy(data)
self.calculate_difference(data, prev, 'cpu')
self.calculate_difference(data, prev, 'diskio')
self.calculate_difference(data, prev, 'netio')
return data
class Configuration:
'''
Contains information reader from config yaml
'''
def __init__(self, config):
self.config = config
def get_interval(self):
return self.config['scheduler']['interval']
def get_elastic_target_host(self):
return self.config['elasticsearch']['target']['host'] + ':' + str(self.config['elasticsearch']['target']['port'])
def get_elastic_source_host(self):
return self.config['elasticsearch']['source']['host'] + ':' + str(self.config['elasticsearch']['source']['port'])
def get_target_index_name(self):
return self.config['elasticsearch']['target']['index']['name'] + "_" + datetime.utcnow().strftime(self.config['elasticsearch']['target']['index']['dateformat'])
def get_target_system_type(self):
return self.config['elasticsearch']['target']['types']['system']
def get_logging_level(self):
if self.config['logging']['level'] == 'DEBUG':
return logging.DEBUG
if self.config['logging']['level'] == 'INFO':
return logging.INFO
if self.config['logging']['level'] == 'WARN':
return logging.WARN
if self.config['logging']['level'] == 'ERROR':
return logging.ERROR
if self.config['logging']['level'] == 'FATAL':
return logging.FATAL
def get_delta_fields(self):
if 'delta' in self.config['elasticsearch']['target']['index']:
return self.config['elasticsearch']['target']['index']['delta']
else:
return None
def get_name_expression(self):
if 'nodeprefix' in self.config['elasticsearch']['target']['index']:
return self.config['elasticsearch']['target']['index']['nodeprefix']
else:
return None
def run_system_only(sys_reader):
sys_reader.index_data()
def run_elastic_only(elastic_reader):
elastic_reader.run()
def add_job_to_scheduler(scheduler, job_func, args):
global conf
interval_unit = conf.get_interval()['units']
interval_value = conf.get_interval()['value']
if interval_unit == 'second':
scheduler.add_job(job_func, 'interval', seconds=interval_value, args=args)
elif interval_unit == 'minute':
scheduler.add_job(job_func, 'interval', minutes=interval_value, args=args)
elif interval_unit == 'hour':
scheduler.add_job(job_func, 'interval', hours=interval_value, args=args)
def main(args):
run_flag = args[1]
bs = BlockingScheduler()
bs.add_executor(ThreadPoolExecutor(5))
system = SystemStatsReader(conf)
elastic = ElasticStatsReader(conf)
if run_flag == 'sys':
add_job_to_scheduler(bs,run_system_only, [system])
elif run_flag == 'elastic':
add_job_to_scheduler(bs, run_elastic_only, [elastic])
elif run_flag == None:
add_job_to_scheduler(bs,run_system_only, [system])
add_job_to_scheduler(bs, run_elastic_only, [elastic])
bs.start()
if __name__ == '__main__':
f = open('./config/config.yaml')
conf = Configuration(yaml.load(f))
f.close()
logging.basicConfig()
logging.getLogger('apscheduler.scheduler').setLevel(conf.get_logging_level())
main(sys.argv)