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# Copyright (c) Authors of Clover
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
from datetime import timedelta
import pprint
import requests
import time
PROMETHEUS_URL = "http://127.0.0.1:9090"
class Monitoring(object):
PROMETHEUS_HEALTH_UP = "up"
PROMETHEUS_ISTIO_TARGETS = {"envoy",
"istio-mesh",
"kubernetes-apiservers",
"kubernetes-cadvisor",
"kubernetes-nodes",
"kubernetes-service-endpoints",
"mixer",
"pilot"}
PROMETHEUS_API_TARGETS = "/api/v1/targets"
PROMETHEUS_API_QUERY = "/api/v1/query"
PROMETHEUS_API_QUERY_RANGE = "/api/v1/query_range"
def __init__(self, host):
self.host = host
def get_targets(self):
try:
# Reference api: https://prometheus.io/docs/prometheus/latest/querying/api/#targets
response = requests.get('%s%s' % (self.host, Monitoring.PROMETHEUS_API_TARGETS))
if response.status_code != 200:
print("ERROR: get targets status code: %r" % response.status_code)
return False
except Exception as e:
print("ERROR: Cannot connect to prometheus\n%s" % e)
return False
return response.json()
def is_targets_healthy(self):
targets = set()
raw_targets = self.get_targets()
if raw_targets == False:
return False
for target in raw_targets["data"]["activeTargets"]:
if target["health"] != Monitoring.PROMETHEUS_HEALTH_UP:
print("ERROR: target unhealth job: %s, health: %s" % \
(target["labels"]["job"], target["health"]))
return False
targets.add(target["labels"]["job"])
diff = Monitoring.PROMETHEUS_ISTIO_TARGETS - targets
if len(diff):
print("ERROR: targets %r not found!" % diff)
return False
return True
# Reference links:
# - https://prometheus.io/docs/prometheus/latest/querying/api/#instant-queries
# - https://prometheus.io/docs/prometheus/latest/querying/api/#range-queries
# - https://github.com/prometheus/prombench/blob/master/apps/load-generator/main.py
def query(self, query_params):
try:
start = time.time()
query_type = query_params.get("type", "instant")
params = {"query": query_params["query"]}
if query_type == "instant":
url = "%s%s" % (self.host, Monitoring.PROMETHEUS_API_QUERY)
elif query_type == "range":
url = "%s%s" % (self.host, Monitoring.PROMETHEUS_API_QUERY_RANGE)
params["start"] = start - duration_seconds(query_params.get("start", "0h"))
params["end"] = start - duration_seconds(query_params.get("end", "0h"))
params["step"] = query_params.get("step", "15s")
else:
print("ERROR: invalidate query type")
return
resp = requests.get(url, params)
dur = time.time() - start
print("query %s %s, status=%s, size=%d, dur=%.3f" % \
(self.host, query_params["query"], resp.status_code, len(resp.text), dur))
#pp = pprint.PrettyPrinter(indent=2)
##pp.pprint(resp.json())
return resp.json()
except Exception as e:
print("ERROR: Could not query prometheus instance %s. \n %s" % (url, e))
def duration_seconds(s):
num = int(s[:-1])
if s.endswith('s'):
return timedelta(seconds=num).total_seconds()
elif s.endswith('m'):
return timedelta(minutes=num).total_seconds()
elif s.endswith('h'):
return timedelta(hours=num).total_seconds()
raise "ERROR: unknown duration %s" % s
def main():
m = Monitoring(PROMETHEUS_URL)
if not m.is_targets_healthy():
print("ERROR: Prometheus targets is unhealthy!")
else:
print("Prometheus targets are all healthy!")
print "\n### query instant"
query_params = {
"type": "instant",
"query": "istio_double_request_count{destination='details.default.svc.cluster.local'}"
}
m.query(query_params)
print "\n### query range"
query_range_param = {
"type": "range",
"query": "istio_double_request_count{destination='details.default.svc.cluster.local'}",
"start": "5m",
"end": "3m",
"step": "30s"
}
m.query(query_range_param)
if __name__ == '__main__':
main()
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