python编写Prometheus exporter

1 Counter

counter指标类型只能增加，重启时置零，可以使用计数器来表示所服务的请求数，已完成的任务或错误。

from prometheus_client import start_http_server, Counter
import random
import time

a = Counter('a', 'Description of Counter')
b = Counter('b', 'Description of Counter',['label1','lable2'])

def process_request(t):
    """A dummy function that takes some time."""
    a.inc() # Increment by 1

    b.labels(label1='k1', lable2='f1').inc(1.6) # Increment by given value
    b.labels(label1='k1', lable2='f2')