How to get CPU & RAM info by using Go (free, used, etc)

Getting Started

To obtain CPU and RAM usage information in Go, you'll use packages available within the Go ecosystem. One of the most popular packages for system monitoring is gopsutil. This package is mature and offers a wide range of capabilities for retrieving system information.

Installation

First, you need to install the gopsutil package. Run the following command in your terminal:

go get github.com/shirou/gopsutil/v3/...

Accessing CPU Information

To get CPU information such as the number of cores, CPU usage, etc., you can use the cpu package provided by gopsutil. Here's how you can do it:

package main

import (
    "fmt"
    "log"
    "github.com/shirou/gopsutil/v3/cpu"
)

func main() {
    // Get CPU Info
    info, err := cpu.Info()
    if err != nil {
        log.Fatal(err)
    }
    for _, ci := range info {
        fmt.Printf("CPU Info: %+v\n", ci)
    }

    // Get CPU Percentage
    percentages, err := cpu.Percent(0, true)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("CPU Percentages: %+v\n", percentages)
}

Accessing RAM Information

To retrieve information about the system's memory such as total, free, and used RAM, you can use the mem package. Below is an example of how to fetch these details:

package main

import (
    "fmt"
    "log"
    "github.com/shirou/gopsutil/v3/mem"
)

func main() {
    // Get Memory Info
    virtualMemory, err := mem.VirtualMemory()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("Total RAM: %v bytes\n", virtualMemory.Total)
    fmt.Printf("Free RAM: %v bytes\n", virtualMemory.Free)
    fmt.Printf("Used RAM: %v bytes\n", virtualMemory.Used)
    fmt.Printf("Used percent: %f%%\n", virtualMemory.UsedPercent)
}