如何在普罗米修斯中使用过滤器编写 API 查询

Question

what I want: get the metrics from Prometheus with python

sample code here:

import requests
url='prometheus.cup.com'
response=requests.get("{0}/api/v1/query_range?query=container_cpu_load_average_10s&start=2018-11-05T00:59:00.781Z&end=2018-11-05T01:00:00.781Z&step=15s".format(url))

sample result is:

{u'beta_kubernetes_io_os': u'linux', u'name': u'k8s_POD_nginx-bf8f468d8-gbjvp_openwhisk01_01f85b0c-9f87-11e8-893e-6c92bf025c32_5', u'image': u'openshift/origin-pod:v3.9.0', u'namespace': u'openwhisk01', u'instance': u'openshift-app1.cup.com', u'job': u'kubernetes-cadvisor', u'pod_name': u'nginx-bf8f468d8-gbjvp', u'container_name': u'POD', u'__name__': u'container_cpu_load_average_10s', u'beta_kubernetes_io_arch': u'amd64', u'id': u'/kubepods.slice/kubepods-besteffort.slice/kubepods-besteffort-pod01f85b0c_9f87_11e8_893e_6c92bf025c32.slice/docker-d7422ab03a96a07395538e5fa5c9d971bb66855f94a45f4540f423cb1da3422f.scope', u'kubernetes_io_hostname': u'openshift-app1.cup.com'}

problem: i want to get result by some filters, like

query=container_cpu_load_average_10s{container_name=POD}, 
(of course, this type is not right, just an example)

so what's the right method to write the API query with filters in python?

thanks in advance

Answer 1

Your code is almost correct, just pass the query as a parameter to the URL. See this abbreviated snippet of code taken from here :

response = requests.get('http://localhost:9090/api/v1/query'),
    params={'query': "query=container_cpu_load_average_10s{container_name=POD}"})
print(response.json()['data']['result'])

Answer 2

Oliver answer have some error, fix it.

 #!/usr/bin/env python import requests prome_sql = "(node_memory_MemTotal_bytes - (node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes)) / node_memory_MemTotal_bytes * 100" response = requests.get('http://192.168.20.249:9090/api/v1/query', params={'query': prome_sql}) print(response.json()["data"]['result'])