Log mailer

Log mailer is a program I made to email log files from a server to me so I don't have to manually check logs everytime. It uses GoLang's "net/smtp" to email.

Build

Prerequisites: Git, Go, SMTP server credentials.

$ git clone https://github.com/muhammadmuzzammil1998/Log-mailer
$ cd Log-mailer
$ go build

Generating configuration file.

$ ./Log-mailer -generate
Location to store configuration file (default: ./configuration.json):
Enter "From" name:      Muhammad Muzzammil
Enter "From" email:     [email protected]
Enter "To" name:        Muhammad Muzzammil
Enter "To" email:       [email protected]
Enter subject:          Error logs from server
Enter SMTP server:      smtp.server.lnk
Port:                   25
Username:               [email protected]
Password:               r34lly53cur3p455w0rd
Location of logs:       /path/to/logs.log
Interval:               6h
Reset log file? (y/n):  y
Configuration file generated: configuration.json.

Description

Input	Description
Configuration File	A single file to store data. Default is ./configuration.json in current directory.
"From" data	The author of the message. Used for "From" header
"To" data	The address of the primary recipient of the message. Used for "To" Header
"Subject"	What you want the subject to be. Used for "Subject" header.
SMTP Server	Link to your mail server.
Port	Port to use for the server.
Username	Username for SMTP server
Password	Password for SMTP server
Location	Location of the log file which is to be emailed
Interval	The duration in which email is repeated. Valid units are "ns", "us", "ms", "s", "m", "h".
Reset logfile	Empties the log file after a successful email.

JSON structure of configuration file

{
    "from": {
        "name": "Muhammad Muzzammil",
        "email": "[email protected]"
    },
    "to": {
        "name": "Muhammad Muzzammil",
        "email": "[email protected]"
    },
    "subject": "Error logs from server",
    "server": "smtp.server.lnk",
    "port": "25",
    "credentials": {
        "user": "[email protected]",
        "password": "r34lly53cur3p455w0rd"
    },
    "logs": "/path/to/logs.log",
    "interval": "6h",
    "reset": "true"
}

Go structure of configurations

type Config struct {
	From        EmailStruct `json:"from"`
	To          EmailStruct `json:"to"`
	Subject     string      `json:"subject"`
	Server      string      `json:"server"`
	Port        string      `json:"port"`
	Credentials Credentials `json:"credentials"`
	Logs        string      `json:"logs"`
	Interval    string      `json:"interval"`
	Reset       string      `json:"reset"`
}

type EmailStruct struct {
	Name  string `json:"name"`
	Email string `json:"email"`
}

type Credentials struct {
	Username string `json:"user"`
	Password string `json:"password"`
}

Generating an empty configuration file.

Just in case someone doesn't want to do it interactively.

$ .\Log-mailer.exe -generate -empty
Location to store configuration file (default: ./configuration.json): configuration_template.json
Empty configuration file generated: configuration_template.json.

Starting Log mailer

Using default (configuration.json) configuration

$ ./Log-mailer

Using different configurations

$ ./Log-mailer -conf [filename]

You can start it as different background processes with -conf flag and different configurations for multiple log files.

Help

Usage of ./Log-mailer:
  -conf string
        Configuration file to load. (default "configuration.json")
  -empty
        Generate an empty configuration file. Use with -generate.
  -generate
        Generate configuration file interactively.