Nagios篇之Nagios服务关联飞书实现消息告警

一、前言
通常情况下，我们在利用Nagios监控来做服务器监控时，告警是必不可少的，以便于运维人员能够及时发现异常，进而处理问题，所以关联Nagios就变得极为重要。

Nagios关联告警的形式很多，可以进行短信推送，钉钉推送，飞书推送等。
Nagios关联钉钉推送的之前有介绍过，可以参考我的这篇文章：

Nagios关联钉钉实现消息告警

二、实现步骤
今天这里就介绍下Nagios关联飞书进行告警：
1、首先必须有飞书群来进行通知
在飞书群中添加自定义机器人进群。如下所示：
在这里插入图片描述
2、复制对应的webhook地址，用请求的方式往这个地址发送告警信息

3、基于代码与Nagios服务进行关联
这里采用Python实现功能

import requests
import json

'''
警告类型: $NOTIFICATIONTYPE$
服务名称: $SERVICEDESC$
主机名: $HOSTALIAS$
IP地址: $HOSTADDRESS$
服务状态: $SERVICESTATE$
时间: $LONGDATETIME$
日志: $SERVICEOUTPUT$
'''

# 获取系统变量


warning_type=str(sys.argv[1])
service_name=str(sys.argv[2])
host_name=str(sys.argv[3])
host_IP=str(sys.argv[4])
service_state=str(sys.argv[5])
warning_time=str(sys.argv[6])
warning_log=str(sys.argv[7])
               
class FeishuAlert():
    def __init__(self):
        self.webhook="替换成个人的飞书群webhook地址，即可运行"
        self.headers={'Content-Type': 'application/json'}

    def post_to_robot(self):
        # webhook：飞书群地址url
        webhook=self.webhook
        # headers: 请求头
        headers=self.headers

        # alert_headers: 告警消息标题
        alert_headers="飞书告警"
        # alert_content: 告警消息内容，用户可根据自身业务内容，定义告警内容
        alert_content="** Nagios警报 **\n\n警告类型: {}\n服务名称: {}\n主机名: {}\nIP地址: {}\n服务状态: {}\n时间: {}\n日志:\n{}".format(        warning_type,service_name,host_name,host_IP,service_state,warning_time,warning_log)

        # message_body: 请求信息主体
        message_body={
            "msg_type": "interactive",
            "card": {
              "config": {
                "wide_screen_mode": True
              },
              "elements": [
                {
                  "tag": "div",
                  "text": {
                    "content":alert_content,
                    "tag": "lark_md"
                  }
                }
              ],
              "header": {
                "template": "red",
                "title": {
                  "content":alert_headers,
                  "tag": "plain_text"
                }
              }
            }}
        response = requests.request("POST", webhook, headers=headers, data=json.dumps(message_body),verify=False)
        print(response)

if __name__ == '__main__':
    alert=FeishuAlert()
    alert.post_to_robot()
    '''
    	"msg_type"参数说明： 飞书告警目前只支持类型4个参数
			post  富文本
			image 图片
			share_chat	分享群名片
			interactive	 消息卡片
		"template"参数说明： 主体颜色
	'''

4、定义nagios配置文件 command.cfg
在这里进行定义server端的command definition
这里采用的是基于python来执行对应的脚本实现告警功能触发

# 'nagios_feishu' service command definition
define command{
    command_name    notify-service-by-feishu
    command_line    /opt/ActivePython-2.7/bin/python /opt/nagios/nagios/libexec/nagios_feitalk.py "$NOTIFICATIONTYPE$" "$SERVICEDESC$" "$HOSTALIAS$" "$HOSTADDRESS$" "$SERVICESTATE$"  "$LONGDATETIME$" "$SERVICEOUTPUT$"
    }

# 'nagios_feishu' host command definition
define command{
    command_name    notify-host-by-feishu
    command_line    /opt/ActivePython-2.7/bin/python /opt/nagios/nagios/libexec/nagios_feitalk.py "$NOTIFICATIONTYPE$" "$SERVICEDESC$" "$HOSTALIAS$" "$HOSTADDRESS$" "$SERVICESTATE$"  "$LONGDATETIME$" "$SERVICEOUTPUT$"
    }

5、接下来也是最重要的，告警推送定义联系人以及组， contact.cfg
用来定义Nagios 推送的用户以及用户组，并且进行定义server端在进行推送时的notification commands，
如下：

define contact{
                      contact_name                    show_sbml
                      use                             generic-contact
                      alias                           Nagios Admin
                      host_notifications_enabled      1
                      service_notifications_enabled   1
                      service_notification_period     worktime
                      host_notification_period        worktime
                      service_notification_options    u,c,r
                      host_notification_options       d,u,r
                      service_notification_commands   notify-service-by-email,notify-service-by-feishu
                      host_notification_commands      notify-host-by-email
                      email                           27f42b1aa9e5db256cebd5998d4f47b01f0d1234de23ca5ee7ae671f106d27b2
                      can_submit_commands             1
    }
    
define contactgroup{
        contactgroup_name       feishu
        alias                   Nagios Administrators
        members                 show_sbml,admins
        }

6、定义nagios通知时区，timeperiods.cfg
为了保证时区准确，以及告警时间的时效性，这里时区的定义也是至于重要的。

###############################################################################
# TIMEPERIODS.CFG - SAMPLE TIMEPERIOD DEFINITIONS
#
# Last Modified: 05-31-2007
#
# NOTES: This config file provides you with some example timeperiod definitions
#        that you can reference in host, service, contact, and dependency
#        definitions.
#
#        You don't need to keep timeperiods in a separate file from your other
#        object definitions.  This has been done just to make things easier to
#        understand.
#
###############################################################################



###############################################################################
###############################################################################
#
# TIME PERIODS
#
###############################################################################
###############################################################################

# This defines a timeperiod where all times are valid for checks,
# notifications, etc.  The classic "24x7" support nightmare. :-)
define timeperiod{
        timeperiod_name 24x7
        alias           24 Hours A Day, 7 Days A Week
        sunday          00:00-24:00
        monday          00:00-24:00
        tuesday         00:00-24:00
        wednesday       00:00-24:00
        thursday        00:00-24:00
        friday          00:00-24:00
        #saturday        09:30-24:00
        saturday        00:00-24:00
        }

define timeperiod{
        timeperiod_name everyday_morning
        alias           everyday_morning
        sunday          08:00-09:00
        monday          08:00-09:00
        tuesday         08:00-09:00
        wednesday       08:00-09:00
        thursday        08:00-09:00
        friday          08:00-09:00
        saturday        08:00-09:00
        }
define timeperiod{
        timeperiod_name everyday_Work
        alias           everyday_Work
        sunday          09:00-18:00
        monday          09:00-18:00
        tuesday         09:00-18:00
        wednesday       09:00-18:00
        thursday        09:00-18:00
        friday          09:00-18:00
        saturday        09:00-18:00
        }
# 'workhours' timeperiod definition
define timeperiod{
        timeperiod_name workhours
        alias           Normal Work Hours
        monday          09:00-17:00
        tuesday         09:00-17:00
        wednesday       09:00-17:00
        thursday        09:00-17:00
        friday          09:00-17:00
        }


# 'none' timeperiod definition
define timeperiod{
        timeperiod_name none
        alias           No Time Is A Good Time
        }


# Some U.S. holidays
# Note: The timeranges for each holiday are meant to *exclude* the holidays from being
# treated as a valid time for notifications, etc.  You probably don't want your pager
# going off on New Year's.  Although you're employer might... :-)
define timeperiod{
        name                    us-holidays
        timeperiod_name         us-holidays
        alias                   U.S. Holidays

        january 1               00:00-00:00     ; New Years
        monday -1 may           00:00-00:00     ; Memorial Day (last Monday in May)
        july 4                  00:00-00:00     ; Independence Day
        monday 1 september      00:00-00:00     ; Labor Day (first Monday in September)
        thursday -1 november    00:00-00:00     ; Thanksgiving (last Thursday in November)
        december 25             00:00-00:00     ; Christmas
        }


# This defines a modified "24x7" timeperiod that covers every day of the
# year, except for U.S. holidays (defined in the timeperiod above).
define timeperiod{
        timeperiod_name 24x7_sans_holidays
        alias           24x7 Sans Holidays

        use             us-holidays             ; Get holiday exceptions from other timeperiod

        sunday          00:00-24:00
        monday          00:00-24:00
        tuesday         00:00-24:00
        wednesday       00:00-24:00
        thursday        00:00-24:00
        friday          00:00-24:00
        saturday        00:00-24:00
        }

define timeperiod{
        timeperiod_name worktime
        alias networkTime
        sunday 06:00-23:59
        monday 06:00-23:59
        tuesday 06:00-23:59
        wednesday 06:00-23:59
        thursday 06:00-23:59
        friday 06:00-23:59
        saturday 06:00-23:59
        }
#Check_put_file_path_log
define timeperiod{
        timeperiod_name uploadfiletime
        alias uploadfiletime
        monday 00:00-24:00
        tuesday 00:00-24:00
        wednesday 00:00-24:00
        thursday 00:00-24:00
        friday 00:00-24:00
        saturday 00:00-24:00
        }

7、定义完成之后需要重启服务，即可生效
8、测试推送结果
手动执行之前定义的脚本，触发功能，观察飞书群中是否有对应的信息生成即可~。

/opt/ActivePython-2.7/bin/python /home/steve/feishu_monitor.py "$NOTIFICATIONTYPE$" "$SERVICEDESC$" "$HOSTALIAS$" "$HOSTADDRESS$" "$SERVICESTATE$"  "$LONGDATETIME$" "$SERVICEOUTPUT$"