Integrate WeChat Alerts into Nagios Using Node.js

With the rapid growth of mobile internet, WeChat is widely used and can be integrated into monitoring systems. This article explains how to add WeChat alerting to Nagios.

1. Register a WeChat public account

Visit https://mp.weixin.qq.com/ and create a public account (subscription or service account).

2. Set up the Node.js simulator

Download the Node.js program and edit config/config.coffee with the account credentials.

The program provides two functions: simulate login and fetch the friend list.

2.1 Retrieve friend information

Access http://IP:8080/wx/friend to get a JSON array of friends. Example output:

{
  "id": 5726745,
  "nick_name": "user1",
  "remark_name": "",
  "group_id": 0
},
{
  "id": 618272308,
  "nick_name": "user2",
  "remark_name": "",
  "group_id": 0
},
{
  "id": 2026561000,
  "nick_name": "user3",
  "remark_name": "",
  "group_id": 0
}

3. Install Node.js

wget http://nodejs.org/dist/v0.10.26/node-v0.10.26-linux-x64.tar.gz
tar xvzf node-v0.10.26-linux-x64.tar.gz
cp -Rp node-v0.10.26 /usr/local/
export PATH=$PATH:/usr/local/node-v0.10.26/bin
# or use nvm for easier installation

4. Run the interface program

cd node_wx
node .   # start the Node.js service

You can run it with pm2 start index.js and configure it to start on boot.

5. Create a shell script to call the WeChat API

Place the script (e.g., weixin.sh) in /usr/local/bin/. The archive weixin.rar contains a sample implementation.

6. Configure Nagios

6.1 Define notification commands (objects/commands.cfg)

define command{
    command_name    notify-host-by-weixin
    command_line    /usr/bin/printf "%b" "*****ERS monitor Robot*****

 Notification Type: $NOTIFICATIONTYPE$
 Host: $HOSTNAME$
State: $HOSTSTATE$
 Address: $HOSTADDRESS$
 Info: $HOSTOUTPUT$

 Date/Time: $LONGDATETIME$
" > /usr/local/nagios/var/weixin.out | /usr/local/bin/weixin.sh -f $CONTACTADDRESS1$
}

define command{
    command_name    notify-service-by-weixin
    command_line    /usr/bin/printf "%b" "***** ERS monitor Robot*****

Notification Type: $NOTIFICATIONTYPE$

Service: $SERVICEDESC$
Host: $HOSTALIAS$
Address: $HOSTADDRESS$
State: $SERVICESTATE$

Date/Time: $LONGDATETIME$

Additional Info:

$SERVICEOUTPUT$
" > /usr/local/nagios/var/weixin.out | /usr/local/bin/weixin.sh -f $CONTACTADDRESS1$
}

6.2 Define a contact that includes the WeChat command (objects/contacts.cfg)

define contact{
    contact_name              nagiosadmin
    alias                     Nagios Admin
    service_notification_period     24x7
    host_notification_period        24x7
    service_notification_options    w,u,c,r,f,s
    host_notification_options       d,u,r,f,s
    service_notification_commands    notify-host-by-email,notify-host-by-sms,notify-service-by-weixin
    host_notification_commands       notify-host-by-email,notify-host-by-sms,notify-service-by-weixin
    pager                       134123456
    email                       [email protected]
    address1                    2447905640   ; WeChat friend ID
}

After saving the configuration, restart Nagios and test the setup. Now Nagios can send alerts to WeChat.

Note: The author’s knowledge is limited; corrections are welcome.