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将获取的指标封装成接口提供API请求调用

1.将阿里云的监控指标推送到企业微信

  • (1)首先需要在项目的根路径下,创建utils包,用于存放项目的其他数据接口;

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  • (2)然后在utils包下,创建一个 wechat_send.py 模块, 用于给用户封装企业微信的接口,提供给外界调用;


import requests
import json
class Wechat_Info:
    def __init__(self):
        self.partyID = '1'
        self.corpID = 'ww5cfabaf35ce8cd7b'
        self.secret = 'uiwvmNj8f1IVy3QYrZ62WePGFKA_BsIPmHigq3TRydM'
        self.agentID = '1000002'
        self.token = None
    def __get_token(self, corpid, secret):
        Url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken"
        Data = {
            "corpid": corpid,
            "corpsecret": secret
        }
        r = requests.get(url=Url, params=Data)
        token = r.json()['access_token']
        return token
    def send_message(self, message):
        url = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={}".format(
            self.__get_token(self.corpID, self.secret))
        data = {
            "toparty": self.partyID,
            "msgtype": "text",
            "agentid": self.agentID,
            "text": {
                "content": message
            },
            "safe": "0"
        }
        result = requests.post(url=url, data=json.dumps(data))
        return result.text
if __name__ == '__main__':
    wechat_info = Wechat_Info()
    result = wechat_info.send_message('微信测试')
    print(result)

  • (3)由于 partyID corpID secret agentID 都是配置信息,需要引入一个读取配置文件的库 configparser

安装:
pip install configparser

  • (4)为了管理所有的配置文件还需要创建一个配置文件目录cfg,可以在cfg目录下创建配置文件,如 xkd.conf 文件;

[Wechat]
party_id = 1
corp_id = ww5cfabaf35ce8cd7b
secret = uiwvmNj8f1IVy3QYrZ62WePGFKA_BsIPmHigq3TRydM
agent_id = 1000002

  • (5)然后可以在utils包下,创建一个 const_file.py 文件,依赖作为项目中全局常量的引用;

import os
PROJECT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
CONFIG_DIR = os.path.join(PROJECT_DIR, 'cfg')
# 指定配置文件的路径
CONFIG_FILE = os.path.join(CONFIG_DIR, 'xkd.conf')

  • (6)接着修改 wechat_send.py 模块接口(配置中的信息都是明文的,在项目开发中,最好将重要的配置信息进行加密,可以使用base64进行加密和解密);

import requests
import json
from configparser import ConfigParser
from utils.const_file import CONFIG_FILE
class Wechat_Info:
    def __init__(self):
        self.wechat_info = self.__get_config_info()
    def __get_config_info(self):
        parser = ConfigParser()
        parser.read(CONFIG_FILE)
        wechat_info = {}
        wechat_info['party_id'] = parser.get('Wechat', 'party_id')
        wechat_info['corp_id'] = parser.get('Wechat', 'corp_id')
        wechat_info['secret'] = parser.get('Wechat', 'secret')
        wechat_info['agent_id'] = parser.get('Wechat', 'agent_id')
        return wechat_info
    def __get_token(self, corpid, secret):
        Url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken"
        Data = {
            "corpid": corpid,
            "corpsecret": secret
        }
        r = requests.get(url=Url, params=Data)
        token = r.json()['access_token']
        return token
    def send_message(self, message):
        url = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={}".format(
            self.__get_token(self.wechat_info.get('corp_id'), self.wechat_info.get('secret')))
        data = {
            "toparty": self.wechat_info.get('party_id'),
            "msgtype": "text",
            "agentid": self.wechat_info.get('agent_id'),
            "text": {
                "content": message
            },
            "safe": "0"
        }
        result = requests.post(url=url, data=json.dumps(data))
        return result.text
if __name__ == '__main__':
    wechat_info = Wechat_Info()
    result = wechat_info.send_message('微信测试')
    print(result)

  • (7)在utils包下,创建 aliyun_monitor.py 文件,封装阿里云的云监控数据的接口;

  • (8)然后编辑xkd.conf配置文件,添加阿里云 RAM access key access key secret region id


[Wechat]
party_id = 1
corp_id = wwabdfbc8feeee095a
secret = NY2nQE1cavlug_IuyMoRlIZDIOdsDS4KMpo_81XWslo
agent_id = 1000002
[ALIYUN]
access_key = LTAIxdvbuz2MD74Z
access_key_secret = I2b7O1UJmkjfgHVC4i7Atb8gGXwAbU
region_id = cn-shenzhen

  • (9)编辑 aliyun_monitor.py 文件;

from aliyunsdkcore import client
from aliyunsdkcms.request.v20180308 import QueryMetricListRequest
from datetime import datetime, timedelta
import json
from configparser import ConfigParser
from utils.const_file import CONFIG_FILE
class CloudMonitor:
    def __init__(self):
        self.ram_info = self.__get_ram_info()
        self.clt = client.AcsClient(self.ram_info.get('access_key'), self.ram_info.get('access_key_secret'), self.ram_info.get('region_id'))
        self.request = QueryMetricListRequest.QueryMetricListRequest()
        self.last_average = None
    def __get_ram_info(self):
        parser = ConfigParser()
        parser.read(CONFIG_FILE)
        ram_info = {}
        ram_info['access_key'] = parser.get('ALIYUN', 'access_key')
        ram_info['access_key_secret'] = parser.get('ALIYUN', 'access_key_secret')
        ram_info['region_id'] = parser.get('ALIYUN', 'region_id')
        return ram_info
    def __get_start_timestamp(self):
        start_datetime = datetime.now() - timedelta(minutes=3)
        start_timestamp = int(start_datetime.timestamp() * 1000)
        return start_timestamp
    def get_last_metric(self,instance_id, monitor_key):
        '''
        :param instance_id: ECS是实例ID
        :param monitor_key: 需要监控的指标
        :return:
        '''
        self.request.set_accept_format('json')
        self.request.set_Project('acs_ecs_dashboard')
        self.request.set_Metric('{}'.format(monitor_key))
        start_time = self.__get_start_timestamp()
        self.request.set_StartTime(start_time)
        self.request.set_EndTime(int(datetime.now().timestamp() * 1000))
        self.request.set_Dimensions("{'instanceId': '%s'}" % (instance_id))
        result = self.clt.do_action_with_exception(self.request)
        result = json.loads(result)
        data_str = result.get('Datapoints')
        data_list = json.loads(data_str)
        return data_list[-1]['Average']
if __name__ == '__main__':
    monitor  = CloudMonitor()
    result = monitor.get_last_metric('i-wz98bynewgl7gu3jqqb3', 'CPUUtilization')
    print(result)

  • (10)使用Django定时任务库,需要用到django-crontab;

pip install django-crontab

  • (11)然后在settings文件中添加 django-crontab 到INSTALLED_APPS;

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'users',
    'courses',
    'teachers',
    'schools',
    'rest_framework',
    'django_crontab',
]

  • (12)在users APP下创建一个cron.py文件,导入 import CloudMonitor Wechat_Info

from utils.aliyun_monitor import CloudMonitor
from utils.wechat_send import Wechat_Info
def send_aliyun_metric_to_wechat():
    monitor = CloudMonitor()
    wechat_info = Wechat_Info()
    result = monitor.get_last_metric('i-wz98bynewgl7gu3jqqb3', 'CPUUtilization')
    wechat_info.send_message('当前服务器CPU使用率是:{}'.format(result))

  • (13)在settings文件中配置定时任务CRONJOBS;

CRONJOBS = [
    ('* * * * *', 'users.cron.send_aliyun_metric_to_wechat')
]

  • (14)最后添加定时任务: python manage.py crontab add

2.configparser模块

  • 安装命令行: pip install configparser

  • ConfigParser是用来读取配置文件的模块,配置文件的格式跟windows下的ini配置文件相似,可以包含一个或多个section,每个section都有自己的option;

  • section 用 [sect_name] 表示,每个option是一个键值对,使用分隔符 = : 隔开;

  • 在 option 中分隔符两端的空格会被忽略掉;

  • 配置文件使用可以使用 # 进行注释;

3.django-crontab库


安装命令:
pip install django-crontab

  • django-crontab使用前需要添加到settings文件中的INSTALLED_APPS中;

  • 添加定时任务: python manage.py crontab add ,注意如果修改了任务,也需要再次运行此命令;

  • 清除定时任务: python manage.py crontab remove

  • 显示定时任务: python manage.py crontab show

  • 注意 django-crontab 必须在Linux的crontab开启的情况下方可使用,不然会出现不执行的情况;

参考: https://www.9xkd.com/user/plan-view.html?id=2761461821


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