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Final Documentation: Enabling VM Internet on a Host with Docker

Objective

To provide persistent internet connectivity to libvirt virtual machines on a host system where Docker's firewall rules are active. This configuration resolves the conflict where Docker's FORWARD DROP policy blocks VM traffic.

The solution consists of two essential parts:

1. Packet Forwarding: Creating high-priority firewall rules to explicitly allow traffic from the VM network (virbr0) to pass through the host's firewall.
2. Network Address Translation (NAT): Enabling masquerading on the libvirt firewall zone so that the VM's private IP address is translated to the host's IP address for communication with the internet.

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ffmpeg -i sounds.m4a -codec:a libmp3lame -b:a 320k output.mp3

for m4a -> mp3

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#!/bin/bash

sudo modprobe wireguard
echo "wireguard" | sudo tee -a /etc/modules
sudo modprobe iptable_nat
 echo "iptable_nat" | sudo tee -a /etc/modules
sudo modprobe ip6table_nat
 echo "ip6table_nat" | sudo tee -a /etc/modules
sudo modprobe iptable_filter
echo "iptable_filter" | sudo tee -a /etc/modules

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networks:
  monitoring:

volumes:
  prometheus_data: {}

services:
  node-exporter:
    image: prom/node-exporter:latest
    container_name: node-exporter

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docker run --rm -p 8080:8080 \
 -e DataSources__EmissionsDataSource="WattTime" \
 -e DataSources__ForecastDataSource="WattTime" \
 -e DataSources__Configurations__WattTime__Type="WattTime" \
 -e DataSources__Configurations__WattTime__username="" \
 -e DataSources__Configurations__WattTime__password="" \
ghcr.io/green-software-foundation/carbon-aware-sdk

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package main

import (
	"fmt"
	"sort"
	"strconv"
	"time"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing/object"

dipankardas011

Some of the important commands

git tag -s -a v1.3.1 -m "version v1.3.1 is out"

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package main

import (
	"context"
	"fmt"
	"log"

	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/service/eks"
	"github.com/aws/aws-sdk-go/aws"

dipankardas011

curl https://pyenv.run | bash

pyenv doctor

env PYTHON_CONFIGURE_OPTS='--enable-optimizations --with-lto' PYTHON_CFLAGS='-march=native -mtune=native' pyenv install 3.12

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package main

import (
	"fmt"
	"sync/atomic"
	"time"
)

func smoothOutListening(rc <-chan string) {
	var ops atomic.Uint64