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# -------------------------------------------------------------------------
# Copyright (c) 2019 Intel Corporation Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
from __future__ import print_function
from os import environ
import logging
import requests
from requests.exceptions import HTTPError
QUERY_API_VERSION = '/api/v1/query'
QUERY_RANGE_API_VERSION = '/api/v1/query_range'
LIST_OF_ENV_VARIABLES = ["DATA_ENDPOINT"]
MAP_ENV_VARIABLES = dict()
LOG = logging.getLogger(__name__)
def set_log_config():
logging.basicConfig(format='%(asctime)s ::%(filename)s :: %(funcName)s :: %(levelname)s :: %(message)s',
datefmt='%m-%d-%Y %I:%M:%S%p',
level=logging.DEBUG,
filename='promql_api.log',
filemode='a')
LOG.info("Set the log configs.")
def load_and_validate_env_vars(list_of_env_vars):
LOG.info("Loading the env variables ...")
for env_var in list_of_env_vars:
if env_var in environ:
LOG.info("Found env variable: {} ".format(env_var.upper()))
MAP_ENV_VARIABLES[env_var.upper()] = environ.get(env_var)
else:
#MAP_ENV_VARIABLES['DATA_ENDPOINT']='http://127.0.0.1:9090' # to be deleted
LOG.error("Env var: {} not found ! ".format(env_var.upper()))
raise KeyError("Env variable: {} not found ! ".format(env_var.upper()))
def query(QUERY_STRING):
"""
Input parameters:
QUERY_STRING : a list of the query strings like ['irate(collectd_cpufreq{exported_instance="otconap7",cpufreq="1"}[2m])']
Return:
returns a list of result sets corresponding to each of the query strings..
SAMPLE O/P:
[{'metric': {'cpufreq': '1',
'endpoint': 'collectd-prometheus',
'exported_instance': 'otconap7',
'instance': '172.25.103.1:9103',
'job': 'collectd',
'namespace': 'edge1',
'pod': 'plundering-liger-collectd-wz7xg',
'service': 'collectd'},
'value': [1559177169.415, '119727200']}]
"""
set_log_config()
load_and_validate_env_vars(LIST_OF_ENV_VARIABLES)
LOG.info("Forming the get request ...")
list_of_substrings = []
params_map = {}
list_of_result_sets = []
list_of_substrings.append(MAP_ENV_VARIABLES['DATA_ENDPOINT'])
list_of_substrings.append(QUERY_API_VERSION)
url = ''.join(list_of_substrings)
for each_query_string in QUERY_STRING:
params_map['query'] = each_query_string
try:
LOG.info('API request::: URL: {} '.format(url))
LOG.info('API request::: params: {} '.format(params_map))
response = requests.get(url, params=params_map)
response.raise_for_status() # This might raise HTTPError which is handled in except block
except HTTPError as http_err:
if response.json()['status'] == "error":
LOG.error("::::ERROR OCCURED::::")
LOG.error("::::ERROR TYPE:::: {}".format(response.json()['errorType']))
LOG.error("::::ERROR:::: {}".format(response.json()['error']))
list_of_result_sets.append(dict({'error':response.json()['error'],
'errorType' : response.json()['errorType']}))
print(f'Check logs..HTTP error occurred: {http_err}')
except Exception as err:
print(f'Check logs..Other error occurred: {err}')
else:
if response.json()['status'] == "error":
LOG.error("::::ERROR OCCURED!::::")
LOG.error("::::ERROR TYPE:::: {}".format(response.json()['errorType']))
LOG.error("::::ERROR:::: {}".format(response.json()['error']))
list_of_result_sets.append(response.json()['error'])
list_of_result_sets.append(dict({'error':response.json()['error'],
'errorType' : response.json()['errorType']}))
else:
results = response.json()['data']['result']
LOG.info('::::::::::RESULTS::::::::::::: {}'.format(each_query_string))
for each_result in results:
LOG.info(each_result)
list_of_result_sets.append(results)
return list_of_result_sets
def validate_parameters(map_of_parameters):
for k,v in map_of_parameters.items():
if k not in ['query', 'start', 'end', 'step', 'timeout']:
LOG.error('Parameter : \'{}\' not supported by query_range'.format(k))
LOG.info('Valid parameters :: \'query\', \'start\', \'end\', \'step\', \'timeout\'')
raise Exception('Parameter : \'{}\' not supported by query_range. Check logs'.format(k))
if not isinstance(k,str):
LOG.error(':: Key Paramter : \'{}\' NOT a string! Keys should be string ::'.format(k))
raise Exception(':: Key Paramter : \'{}\' NOT a string! Keys should be string ::'.format(k))
if not isinstance(v,str):
LOG.error(':: Value Paramter of key: \'{}\' NOT a string! Values should be string ::'.format(k))
raise Exception(':: Value Paramter of key: \'{}\' NOT a string! Values should be string ::'.format(k))
return True
def query_range(map_of_parameters):
list_of_result_sets = []
set_log_config()
if validate_parameters(map_of_parameters):
LOG.info(':::Validation of map_of_parameters done::')
load_and_validate_env_vars(LIST_OF_ENV_VARIABLES)
LOG.info("Forming the query_range request ...")
list_of_substrings = []
list_of_substrings.append(MAP_ENV_VARIABLES['DATA_ENDPOINT'])
list_of_substrings.append(QUERY_RANGE_API_VERSION)
url = ''.join(list_of_substrings)
try:
LOG.info('API request::: URL: {} '.format(url))
LOG.info('API request::: params: {} '.format(map_of_parameters))
response = requests.get(url, params=map_of_parameters)
response.raise_for_status() # This might raise HTTPError which is handled in except block
except HTTPError as http_err:
if response.json()['status'] == "error":
LOG.error("::::ERROR OCCURED::::")
LOG.error("::::ERROR TYPE:::: {}".format(response.json()['errorType']))
LOG.error("::::ERROR:::: {}".format(response.json()['error']))
print(f'Check logs..HTTP error occurred: {http_err}')
except Exception as err:
print(f'Check logs..Other error occurred: {err}')
else:
if response.json()['status'] == "error":
LOG.error("::::ERROR OCCURED!::::")
LOG.error("::::ERROR TYPE:::: {}".format(response.json()['errorType']))
LOG.error("::::ERROR:::: {}".format(response.json()['error']))
list_of_result_sets.append(response.json()['error'])
list_of_result_sets.append(dict({'error':response.json()['error'],
'errorType' : response.json()['errorType']}))
else:
results = response.json()['data']['result']
LOG.info('::::::::::RESULTS OF QUERY_RANGE::::::::::::: {}'.format(map_of_parameters))
list_of_result_sets.append(results)
return list_of_result_sets
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