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MetalLB: Layer 2 vs BGP Mode Comparison

🎯 Introduction

MetalLB is a load-balancer implementation for bare metal Kubernetes clusters. This document compares its two main operational modes: Layer 2 and BGP, helping you choose the right one for your environment.

🔁 Layer 2 Mode

🏗️ Example Cluster Setup

📦 Cluster Setup

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version: "3.7"

services:
  # Node 0
  redis-node-0:
    image: docker.io/bitnami/redis-cluster:7.4
    volumes:
      - redis_cluster_data_0:/bitnami/redis/data
    environment:
      - "REDIS_PASSWORD=bitnami"

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How to Set Up a stable MongoDB Replica Set Localy for Developing

version: "3.9"

services:
  mongodb-primary:
    image: docker.io/bitnami/mongodb:5.0
    environment:
      - MONGODB_ADVERTISED_HOSTNAME=mongodb-primary

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1. bash behind proxy:

Edit .profile file (with vi or nano)

nano .profile

And add following lines:

export http_proxy=http://127.0.0.1:8888/
export https_proxy=http://127.0.0.1:8888/

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Restore Backup with Minio (Minio <----> Local)

Instructions for restoring buckets using Minio mirror features.

Install Minio Client

Install Link install link

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Restore Backup with Longhorn

Instructions for restoring data using Longhorn backup and restore features.

Restore Backup

Example: Restoring PostgreSQL Data

1. Scale Down the PostgreSQL StatefulSet:

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This guide will help you determine the available disk space on a Hetzner volume assigned to a K3S node.

1- Find Volume ID

• Using hcloud CLI:

Run the following command to list your volumes:

hcloud volume list