Tob => Bot

A Notification Bot written in Go

Architecture

Screenshot

Discord

Email

Slack

Telegram

Getting Started

Install from the latest release (https://github.com/telkomdev/tob/releases)

choose the binary from the release according to your platform, for example for the Linux platform

Download binary

$  wget https://github.com/telkomdev/tob/releases/download/1.4.2/tob-1.4.2.linux-amd64.tar.gz

Important !!!, always check the SHA256 Checksum before using it

Download sha256sum.txt according to the binary version you downloaded https://github.com/telkomdev/tob/releases/download/1.4.2/sha256sums.txt

$ wget https://github.com/telkomdev/tob/releases/download/1.4.2/sha256sums.txt

Verify SHA256 Checksum

Linux

$ sha256sum tob-1.4.2.linux-amd64.tar.gz -c sha256sums.txt
tob-1.4.2.linux-amd64.tar.gz: OK

Mac OSX

$ shasum -a 256 tob-1.4.2.darwin-amd64.tar.gz -c sha256sums.txt
tob-1.4.2.darwin-amd64.tar.gz: OK

You should be able to see that the checksum value for the file is valid, tob-1.4.2.linux-amd64.tar.gz: OK and tob-1.4.2.darwin-amd64.tar.gz: OK. Indicates the file is not damaged, not modified and safe to use.

Extract

$ tar -xvzf tob-1.4.2.linux-amd64.tar.gz

Run

$ ./tob -c config.json

Build from source

Requirements

• Go version 1.16 or higher

Clone tob to your Machine

$ git clone https://github.com/telkomdev/tob.git
$ cd tob/

$ make build

tob options

$ ./tob -h

Running tob with config file

$ ./tob -c config.json

Service and Kind

currently tob supports below KIND of services

• airflow
• airflowflower
• elasticsearch
• kafka
• mongodb
• mysql
• postgresql
• redis
• web
• diskstatus

KIND represents one or many services. So you can monitor more than one service with the same KIND. For example, you can monitor multiple PostgreSQL instances. Or you can monitor multiple web applications.

checkInterval: in Seconds is how often your service is called by tob.

enable you set true when you want to monitor the service. Set it to false, if you don't want to monitor it.

config.json

"postgresql_one": {
    "kind": "postgresql",
    "url": "postgres://demo:12345@localhost:5432/demo?sslmode=disable",
    "checkInterval": 10,
    "enable": false
},

"postgresql_two": {
    "kind": "postgresql",
    "url": "postgres://demo:12345@localhost:5433/demo?sslmode=disable",
    "checkInterval": 10,
    "enable": false
},

"web_internal": {
    "kind": "web",
    "url": "https://portal.mycompany.com/health-check",
    "checkInterval": 5,
    "enable": true
},

"web_main_1": {
    "kind": "web",
    "url": "https://mycompany.com/health-check",
    "checkInterval": 5,
    "enable": true
}

Disk Status Monitoring

To monitor Disk Status on a Server Computer, tob requires a special agent that can be called by tob. So we need to deploy an agent, in this case tob-http-agent to the Server Computer whose Disk Status we need to monitor.

Download tob-http-agent binary

$  wget https://github.com/telkomdev/tob/releases/download/1.4.2/tob-http-agent-1.1.0.linux-amd64.tar.gz

Important !!!, always check the SHA256 Checksum before using it

Download tob-http-agent-sha256sums.txt according to the binary version you downloaded https://github.com/telkomdev/tob/releases/download/1.4.2/tob-http-agent-sha256sums.txt

$ wget https://github.com/telkomdev/tob/releases/download/1.4.2/tob-http-agent-sha256sums.txt

Verify tob-http-agent SHA256 Checksum

Linux

$ sha256sum tob-http-agent-1.1.0.linux-amd64.tar.gz -c tob-http-agent-sha256sums.txt
tob-http-agent-1.1.0.linux-amd64.tar.gz: OK

Extract tob-http-agent

$ tar -xvzf tob-http-agent-1.1.0.linux-amd64.tar.gz

Run tob-http-agent as a daemon with systemd

Create tob-http-agent.service systemd unit service

$ sudo vi /etc/systemd/system/tob-http-agent.service

Copy content from this file to the /etc/systemd/system/tob-http-agent.service and save

https://github.com/telkomdev/tob/blob/master/deployments/systemd/tob-http-agent.service

Reload systemd daemon

$ sudo systemctl daemon-reload

Start tob-http-agent service

$ sudo systemctl start tob-http-agent

Check if its running

$ sudo systemctl status tob-http-agent

Expose tob-http-agent service with nginx

Create tob-http-agent.conf

$ sudo vi /etc/nginx/sites-available/tob-http-agent.conf

Copy content from this file to the /etc/nginx/sites-available/tob-http-agent.conf and save

https://github.com/telkomdev/tob/blob/master/deployments/nginx/tob-http-agent-nginx.conf

Create /etc/nginx/sites-available/tob-http-agent.conf symlink

$ sudo ln -s /etc/nginx/sites-available/tob-http-agent.conf /etc/nginx/sites-enabled/

Make sure the nginx configuration is not error

$ sudo nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

Restart nginx

$  sudo systemctl restart nginx

Add diskstatus config to the tob service config

"ubuntu_1_storage_status": {
    "kind": "diskstatus",
    "url": "http://tob-http-agent.yourdomain.com",
    "checkInterval": 5,
    "thresholdDiskUsage": 90,
    "enable": true
}

Notificator

Currently tob supports the following types of Notificator. Notificator is where the tob will send notifications when one or more of the services you're monitoring have problems.

• Discord
• Email with SMTP
• Slack (webhook) https://api.slack.com/messaging/webhooks
• Telegram
• Webhook | For security reasons, your webhook endpoint must verify the HTTP header: x-tob-token that is in every incoming http request.

Example of x-tob-token webhook verification in nodejs application

const express = require('express');
const app = express();
const bodyParser = require('body-parser');

const PORT = 3001;

const tobToken = "461b919e-1bf4-42db-a8ff-4f21633bbf10";

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.post('/webhook/tob', (req, res) => {
    const headers = req.headers;
    const token = headers["x-tob-token"];
    
    const verifiedRequest = token === tobToken;
    if (!verifiedRequest) {
        return res.status(401).send({'message': 'token is not valid'});
    }

    console.log(req.body);

    return res.status(200).send({'message': 'webbhook received'});
});

app.listen(PORT, () => console.log(`Server listening on port: ${PORT}`));

The tobToken variable must be the same as the tobToken config located in the config.json file

"webhook": {
    "url": "https://api.yourcompany.com/webhook/tob",
    "tobToken": "461b919e-1bf4-42db-a8ff-4f21633bbf10",
    "enable": true
}

tob will send a message/payload in the following form to the webhook endpoint that you have specified in the config above.

{ 
    "message": "mysql_cluster_1 is DOWN" 
}