【ZooKeeper】写一个python的prometheus exporter来输出指标值到Grafana

import os
import time
 
from kazoo.client import KazooClient
from prometheus_client import Info
from prometheus_client import start_http_server
 
hosts = os.getenv('ZK_HOSTS', '127.0.0.1:2181')
master_path = os.getenv('MASTER_PATH', '/xxx/election')
exporter_port = os.getenv('EXPORTER_PORT', '8000')
 
 
# get master election ip
def get_master_ip():
  zk = KazooClient(hosts=hosts)
  zk.start()
  node = zk.get(master_path)[0]
  zk.stop()
  # tag master ip to metrics
  i = Info('election', 'master ip')
  i.info({'election_master_ip': node})
 
 
if __name__ == '__main__':
  # Start up the server to expose the metrics.
  get_master_ip()
  start_http_server(int(exporter_port))
  # Generate some requests.
  while True:
    time.sleep(30)

# HELP election_info woodpeckserver master ip
# TYPE election_info gauge
election_info{election_master_ip="xx.xx.15.139"} 1.0
# HELP python_info Python platform information
# TYPE python_info gauge
python_info{implementation="CPython",major="2",minor="7",patchlevel="5",version="2.7.5"} 1.0