DueWeekly Tech: 08-09-2026 to 13-09-2026

Architecture

1. Medium - GitOps Was Never Just About Kubernetes:Here’s What It Looks Like Everywhere Else

• GitOps Extends Far Beyond Kubernetes: GitOps isn’t limited to Kubernetes clusters; it transforms operational configurations across the entire software industry into version-controlled declarative code that is automatically pulled and reconciled. Key applications include:

  • Database Schema Declarations: Managing schema migrations declaratively using tools like Atlas.
  • Infrastructure Provisioning: Automating infrastructure state across major IaC frameworks via Atlantis, TF-Controller, or enterprise engines like Spacelift.
  • SaaS and Cloud Management: Driving configuration for GitHub branch protection rules, Datadog/Grafana monitoring dashboards, and DNS records directly from Git.

• Reconciliation Beyond K8s Native Tooling: This pattern establishes continuous reconciliation loops connecting Git version control to third-party APIs beyond standard Kubernetes objects. However, blindly applying GitOps everywhere can lead to architectural pitfalls, which the author highlights as critical anti-patterns to avoid.

Cloud

1. Geekforgeek - Overview of Multi Cloud

• A Comprehensive Overview of Multi-Cloud Architecture: A thorough summary introducing one of the most critical and widely adopted architectural patterns to consider today.
• Deep-Dive Topics Covered: Throughout the article, you will explore the core pillars of multi-cloud setups, including key distinctions between multi-cloud and hybrid cloud models, the pros and cons of adoption, real-world operational challenges, cost complexity management, and strategic frameworks for multi-cloud governance.

2. RedHat - Building a scalable virtual private cloud with Red Hat OpenStack Services on OpenShift 🌟 (Recommended)

• Building a Private Cloud with OpenStack on OpenShift: Learn how to deploy and operate Red Hat OpenStack Services on OpenShift (Red Hat’s Kubernetes platform), exploring core private cloud components, networking architecture, and cross-workload connectivity across tenants, clusters, and data centers.
• Core Networking & Security Infrastructure: Deep-dive into foundational cloud primitives, including security groups, distributed firewalls, and DNS as a Service (DNSaaS).
• VPC Mapping & Multi-Cloud Scaling: Map traditional Virtual Private Cloud (VPC) concepts directly to OpenStack-on-OpenShift CRDs, and explore architectural patterns for extending connectivity to external networks and hybrid multi-cloud topologies.

3. AWS - Ultra-low-latency cross-Region crypto trading with Avelacom and AWS

• Tackling Cross-Region Latency in Crypto Trading: Explore a case study detailing how a crypto exchange tackled severe cross-region latency challenges. Learn how they optimized their network and delivered high-performance user experiences by leveraging the AWS ecosystem—specifically utilizing private fiber infrastructure, controlled network paths, multi-layer redundancy, and AWS Direct Connect.
• Infrastructure Design & Performance Validation: Delve into their infrastructure via detailed architectural diagrams, and discover how they tested and measured final outcomes to guarantee low-latency execution. The study includes a concrete evaluation of P50 and P99 latency metrics, comparing default AWS cross-region routing against their dedicated AWS Direct Connect setup.

4. AWS - Creating a Multi-Region Application with AWS Services – Part 1, Compute, Networking, and Security

5. AWS - Creating a Multi-Region Application with AWS Services – Part 2, Data and Replication

6. AWS - Creating a Multi-Region Application with AWS Services – Part 3, Application Management and Monitoring

• Navigating the AWS Multi-Region Ecosystem: A comprehensive series breaking down the 200+ AWS services into digestible, focus areas to help you evaluate, architect, and manage multi-region infrastructure without feeling overwhelmed.
• Problem-Solving & Architectural Blueprints: Each installment tackles specific real-world challenges, detailing which AWS services to select and how to compose them into a resilient, cohesive multi-region topology.

7. AWS - Network latency concepts and best practices for a resilient architecture

• Understanding Network Latency Fundamentals: Dive into essential networking concepts—including packet loss, jitter, latency thresholds, and throughput constraints—alongside proven best practices for engineering highly resilient, fault-tolerant cloud architectures.
• AWS Inter-Region Latency Analysis: Utilizing tools like the AWS Region Latency Matrix (CloudPing), you can evaluate real-time, cross-region network performance to make data-driven decisions on region placement, optimize traffic routing, and select target architecture patterns to minimize global latency.

8. AWS - Selecting the Right AWS VPN Solution: A Decision Framework 🌟 (Recommended)

• Navigating AWS VPN Solutions: AWS provides a diverse suite of Virtual Private Network (VPN) options to solve complex hybrid connectivity challenges, making the selection process difficult without a clear comparison.
• Use Cases & Strategic Alignment: This section breaks down each AWS VPN offering—comparing operational models, security architectures, bandwidth constraints, and target use cases—to help you select the most compatible strategy for your infrastructure needs.

Kubernetes

1. Blog - How to Monitor Kubernetes Multi-Cluster Workloads

• Multi-Cluster Kubernetes Monitoring Essentials: A comprehensive guide exploring how to observe workloads across multi-cluster Kubernetes environments—covering why unified observability matters, common cross-cluster challenges, and key tools spanning open-source platforms and cloud-native solutions.
• Agent Collector Setup & Telemetry Centralization: Learn how to deploy edge collector agents (such as OpenTelemetry Collector or Azure Monitor Agent), aggregate logs centrally into storage backends like Loki, secure cross-cluster telemetry pipelines via mutual TLS (mTLS), manage collector resource limits, and build high-visibility Grafana dashboards.
• Core Metrics, Backend Trade-offs & Pitfalls: Discover essential multi-cluster metrics to track across control planes and worker nodes, review a comparative analysis of storage backends (Thanos, Mimir, VictoriaMetrics, CloudWatch), and explore proven strategies to avoid common multi-cluster observability anti-patterns.

2. Medium - Multi-Cluster Monitoring: Stop Managing Configs, Start Automating Infrastructure 🌟 (Recommended)

• Adaptive Cluster Management with Sveltos: An excellent starting point for configuring monitoring and solving scalability challenges across edge environments using Sveltos—a declarative tool designed to manage the full lifecycle of Kubernetes cluster add-ons and applications. By leveraging ClusterProfiles and its built-in Event Framework, Sveltos transitions setups from static deployments to truly adaptive infrastructure, allowing the Management Cluster to dynamically react to real-time events occurring at edge nodes.
• Hands-On Walkthrough & Step-by-Step Setup: The author provides a detailed, step-by-step guide walking you through full solution deployment, configuration patterns, and expected runtime outcomes across managed clusters.

3. Kubermatic - Multi-Cluster Kubernetes Management With Operators

• Declarative Multi-Cluster Operations with Kubermatic: An introductory guide demonstrating how to leverage Kubernetes Operators within multi-cluster environments. By utilizing machine-controller, Kubermatic implements the Cluster API spec to bring declarative node provisioning, configuration, and infrastructure management to worker pools.

4. Dev.to - Zero-code PII sanitization for Grafana Loki and Promtail in Kubernetes

• Log Sanitization & GDPR Compliance with PII Shield: If you are seeking an effective solution to redact sensitive data from Kubernetes log streams for GDPR compliance, this post explores PII Shield. It highlights the pitfalls of manually relying on complex Promtail regex rules—which often drop valuable log context and spike node CPU usage—and demonstrates how deploying PII Shield as a sidecar cleanly redacts sensitive telemetry directly from stdout.
• Sidecar Configuration & Loki Integration: The article includes practical YAML examples for configuring the PII Shield sidecar container within Kubernetes pods, showcasing the resulting redacted log output and performance gains when upgrading your Grafana Loki logging stack.

5. APIPark - Securely Route Container Through VPN: A Comprehensive Guide

• Architectural Patterns for Secure Container VPN Routing: An overview detailing proven strategies to route application traffic securely through a VPN, evaluating four core design patterns:

  • Sidecar Pattern: Embedding a dedicated VPN client container directly within the application Pod (sharing the network namespace).

  • Node-Level VPN: Terminating the VPN tunnel at the underlying host/node level via WireGuard or IPSec for all host workloads.

  • Dedicated VPN Gateway Container/Service: Setting up a centralized egress gateway Pod to route select cluster traffic out through a shared VPN tunnel.

  • Service Mesh Integration: Leveraging Istio or Linkerd to orchestrate secure mTLS egress routing and policy-driven VPN gateway tunneling.

• Hands-on Configuration, Entrypoint Scripts & Troubleshooting: Delves into practical setup guides—including custom container entrypoint shell scripts (iptables and ip route configurations) for Docker and Kubernetes Pods—alongside common operational pitfalls (DNS leaks, routing loops, MTU mismatches, dropped keepalives) and actionable remediation steps.

• Modern Keywords & The Future of Container Networking: Introduces key forward-looking concepts—such as eBPF-based networking (Cilium), WireGuard-native K8s CNI integration, Tailscale/Nebula mesh overlays, and zero-trust application egress policies—to guide future exploration.

Networking

1. BGP Failover and Multi-Homing from Two VPS Locations

• BGP Multihoming & High Availability Across Remote VPS Instances: An introductory guide explaining the core concepts of BGP Multihoming and how to architect automatic failover and load balancing across infrastructure deployed across distinct VPS providers or geographic locations.
• Hands-on BIRD2 & FRR Configuration: Provides step-by-step instructions and command-line workflows for configuring open-source routing daemons—specifically BIRD2 and FRR (Free Range Routing)—to announce autonomous system numbers (ASNs), manage BGP sessions, handle IP anycast, and orchestrate dynamic path failover.

2. Level Zero Networking (Blog) - Scalable and Secure VxLAN Multisite using NetBird – Part 1:Initial Config-L3VPN

• Multi-Site L3VPN Infrastructure via VxLAN over Netbird on VyOS: A comprehensive guide detailing how to establish secure, scalable site-to-site overlay networks by combining VxLAN (RFC 7348) with Netbird mesh connectivity on VyOS routing platforms. Utilizing L3VPN architecture over VxLAN unlocks extensible Layer 2/Layer 3 overlay capabilities, enabling seamless cross-site subnet bridging and encrypted multi-datacenter connectivity.
• Hands-on Step-by-Step Implementation: Features a complete walkthrough including exact VyOS CLI commands, Netbird client integration steps, routing table verification, and detailed architectural breakdowns explaining how packet encapsulation and overlay routes behave across site boundaries.

Here below is couple of matrix I collected for adopt several OpenSource VPN solution for Site-to-site

HUB-AND-SPOKE (Pritunl)          PEER-TO-PEER MESH (NetBird)
  [Site A]     [Site B]           [Site A Router] <====Direct====> [Site B Router]
      \           /                                \               /
       \         /                                  \             /
    [Pritunl Server]                              [NetBird Control Plane]
   (Central Bottleneck)                     (Exchanges Keys/Metadata Only)

Feature / Metric	NetBird	Pritunl (WireGuard/OpenVPN)	Headscale + Tailscale Client	Defined Net / Nebula
Data-Path Latency	Lowest (Direct P2P WireGuard)	Medium to High (Routed through Gateway)	Lowest (Direct P2P WireGuard)	Lowest (Direct P2P Noise/UDP)
Control-Plane Model	Fully Open Source (BSD-3/AGPLv3)	Open Core (Proprietary enterprise features)	Open Source (Community engine for Tailscale)	Fully Open Source (Apache 2.0)
NAT Traversal Mechanism	ICE / WebSockets / Custom STUN & TURN	Traditional Port Forwarding / Static IPs	STUN / DERP Relays	Lighthouse nodes / UDP hole punching
Site-to-Site Gateway	Native Routing Nodes	Traditional Central VPN Server	Subnet Routers	Relies on Overlay IPs per host
ACL / Policy Model	Centralized UI / API Group-based ZTNA	Organization & Route-based ACLs	YAML Policy / JSON ACLs	Host-level PKI certificates
Key Management	Automated via Signal Server	Automated via Pritunl Server	Automated via Headscale Server	Manual / Automated PKI CA setup

Dimension	Native NetBird Gateway	VXLAN / EVPN over NetBird (VyOS)
Encapsulation Overhead	Lowest (Outer IP + UDP + WireGuard)	Higher (Outer IP + UDP + WireGuard + VXLAN Header)
Layer Adjacency	Layer 3 Only (IP Routing between subnets)	Layer 2 or Layer 3 (Stretched VLANs & L3VPN)
Control Plane	NetBird Management UI (Static Routes/ACLs)	MP-BGP EVPN running inside the WireGuard tunnel
MTU Penalty	~60 Bytes (WireGuard over IPv4)	~110 Bytes (60 B WireGuard + 50 B VXLAN) $\to$ Max MTU $\approx 1390$
Multi-Tenancy	Groups/ACLs in NetBird UI	VRF & VNI Isolation (True enterprise multi-tenancy)
Setup Complexity	Very Low (Docker Compose + simple UI)	High (Requires VyOS, BGP/EVPN knowledge, and container management)

Security

1. Dev.to - WireGuard DoV (DNS-over-VPN) 🌟 (Recommended)

• Securing DNS Resolution over VPN: An in-depth guide on implementing DNS over Encrypted Tunnels to eliminate DNS sniffing, spoofing, and ISP-level hijacking or transparent DNS redirection. The article highlights AdGuard dnsproxy as a lightweight local resolver, while evaluating alternative privacy-focused resolvers including dnscrypt-proxy, CoreDNS, and Unbound.
• Hands-on WireGuard, Firewall & Proxy Rules: Provides production-ready configuration manifests covering WireGuard interface rules, dnsproxy upstream DoH/DoT forwarding patterns, and strict iptables/nftables firewall rules designed to block unencrypted DNS leaks (UDP/53) outside the encrypted tunnel.
• Overcoming Network Restrictions & NAT Traversal: Addresses inherent VPN limitations under restricted networks, detailing NAT traversal and tunnel encapsulation workarounds using high-performance reverse proxies like rathole, frp, and tun2socks to route full L3 IP stack traffic over restricted L7 proxies.

Also I got a short discovery about these tools above by they fall into three main categories:

1. DNS Resolvers / Proxies (Layer 7 DNS): dnsproxy, CoreDNS, Unbound
2. Reverse Tunnels / NAT Traversal (Layer 4 TCP/UDP Port Forwarders): rathole, frp
3. Transparent IP-Level Tunnels (Layer 3 Network Tun): tun2socks

Tool	Category	Primary Function	Encrypted Upstream Support (DoH/DoT/DoQ)	NAT Traversal / Remote Expose	Layer 3 Routing (System-wide traffic)	Complexity & Overhead	Best Use Case
dnsproxy	DNS Proxy	High-performance DNS proxy & DoH/DoT listener	Native & Excellent (DoH, DoT, DoQ, DNS-over-HTTPS/3)	❌ No	❌ No	Very Low (Single binary, lightweight Go engine)	Forwarding local client DNS to remote VPS secure endpoints with ultra-low latency.
CoreDNS	DNS Resolver / Server	Extensible plugin-based DNS middleware engine	High (via plugins like forward or tls)	❌ No	❌ No	Medium (Requires Corefile syntax knowledge)	Complex DNS rewriting, split-horizon routing, or enterprise Kubernetes integration.
Unbound	Recursive DNS Resolver	Authoritative/Recursive root server querying	Moderate (Primarily DoT upstream & DNSSEC)	❌ No	❌ No	Medium to High (Requires tuning C/cache settings)	Maximum privacy by resolving directly to root nameservers without upstream ISP dependencies.
rathole	Layer 4 Reverse Proxy	High-performance Rust-based port forwarder	N/A (Exposes raw TCP/UDP port data)	Native & Optimized	❌ No	Low (Simple client/server configuration)	Tunnelling UDP (port 53) or TCP (DoT) traffic through NAT/firewalls from VPS to home server.
frp	Layer 4/7 Reverse Proxy	Feature-rich reverse proxy / NAT traversal	N/A (Proxies raw protocols)	Native & Feature-Rich (includes Web Dashboard)	❌ No	Medium (Higher memory overhead than rathole)	Exposing internal DNS endpoints behind deep NATs with a web UI management interface.
tun2socks	Layer 3 TUN Device	Translates system TUN interface traffic to SOCKS5/HTTP proxy	N/A (Operates on raw IP packet level)	❌ No (Requires external proxy gateway)	Native & Complete	Medium (Requires OS-level routing table adjustments)	Forcing all OS-level network traffic (including all system DNS queries) through a VPS proxy.

Depending on the exact target architecture for the VPS DNS pipeline, the following combinations yield the best results:

Option A: Ultra-Fast Secure Forwarder (Low Overhead)

• Stack: dnsproxy (Client/Local) $⟶$ NetBird / WireGuard $⟶$ dnsproxy or CoreDNS (VPS)
• Why: dnsproxy uses minimal memory and CPU while natively handling DoH/DoT/DoQ multiplexing. Combined with WireGuard or NetBird direct P2P mesh, it eliminates proxy overhead.

Option B: Exposing Home DNS via VPS (Behind CGNAT / Firewalls)

• Stack: Unbound / CoreDNS (Home Network) $⟶$ rathole client $⟶$ rathole server (VPS Public IP)
• Why: rathole provides lightweight, memory-safe Rust-based NAT traversal. The public VPS receives DNS queries on port 53 and tunnels them directly to your home Unbound instance over an encrypted channel.

Option C: System-Wide Invisible Routing over SOCKS5

• Stack: OS Traffic $⟶$ tun2socks $⟶$ SOCKS5 Tunnel (VPS) $⟶$ Upstream DNS (CoreDNS / Public)
• Why: If local applications bypass standard resolv.conf settings, tun2socks creates a virtual network interface (TUN) to capture all raw IP packets and send them down the VPS tunnel automatically.

Others more keywork to discovery, you can find out into this matrix

1. ALL-IN-ONE TUNNEL / ROUTER DRIVERS: (sing-box / Xray-core) → Handles DNS, SOCKS5, Shadowsocks/VLESS, and TUN routing in a single binary.

2. SECURE ENCRYPTED DNS DAEMONS: DNSCrypt-Proxy / AdGuard Home → Built specifically for encrypted upstreams (DoH/DoT/DoQ/DNSCrypt) with adblocking.

3. SMART DNS / SNI PROXIES: sniproxy + BIND/dnsmasq → Routes ONLY domain-matching traffic through the VPS, letting heavy media stream directly.

Tool	Category	Primary Function	Native Encryption (DoH/DoT/DoQ)	Layer 3 TUN Routing	Memory / CPU Overhead	Key Advantage
sing-box	Universal Proxy Engine	All-in-one routing framework	Native & Advanced	Yes (Built-in TUN driver)	Very Low (Go-based)	Replaces tun2socks + dnsproxy + v2ray with a single, highly performant engine.
AdGuard Home	DNS Server & Ad-Blocker	Network-wide filtering & secure resolver	Native (DoH, DoT, DoQ, DNSCrypt)	❌ No	Low (Web UI included)	Best for user-friendly UI, rule-based upstream routing, and built-in privacy protection.
DNSCrypt-Proxy	Secure DNS Client	Encrypted DNS tunnel daemon	Native (DNSCrypt v2 & DoH)	❌ No	Extremely Low	High resistance against DNS censorship, tampering, and deep packet inspection (DPI).
sniproxy	Layer 7 SNI Proxy	Proxies HTTP/HTTPS based on TLS SNI	N/A (Operates at TCP SNI layer)	❌ No	Very Low (C-based)	Used alongside DNS to build custom Smart DNS setups (rerouting only geo-blocked targets).
Xray-core	Routing Platform	Advanced proxy & traffic classifier	Native (Supports arbitrary DNS over proxy)	Yes (via tproxy / TUN)	Low to Medium	Granular routing rules (e.g., route domestic DNS locally, send targeted domains to VPS).

2. MDPI - Data Protection by Design Tool for Automated GDPR Compliance Verification Based on Semantically Modeled Informed Consent

3. TLS vs mTLS: Differences, Use Cases, and Implementation Guide

• TLS vs. mTLS Deep Dive: An essential architectural breakdown comparing Transport Layer Security (TLS) and mutual TLS (mTLS), highlighting their core cryptographic mechanics, distinct authentication flows, and ideal use cases.

Explore more about concept related into TLS and the story about adoption

• Istio Service Mesh Workshop - Traffic encryption using mTLS
• Dev.to - Understanding mTLS in Cloud Environments: A Complete Guide
• AWS - Introducing mTLS for Application Load Balancer
• Medium - Mutual TLS (mTLS): A Deep Dive into Secure Client-Server Communication

4. Linkedin - mTLS vs. VPN: What Each Actually Does, and When One Should Replace the Other

• mTLS vs. VPN: Architectural Scope & Purpose: A clear breakdown distinguishing Mutual TLS (mTLS) from Virtual Private Networks (VPNs). While a VPN establishes an encrypted Layer 3/Layer 4 network tunnel between hosts or entire networks, mTLS enforces application-layer (Layer 7) bidirectional identity verification and encryption between specific endpoints.

• When to Choose (or Combine) Them:

  • Use VPNs when: You need broad network-level access control, legacy application connectivity without code changes, or secure site-to-site inter-datacenter links.
  • Use mTLS when: You are building zero-trust microservice architectures, securing API communication across distributed Kubernetes clusters, or requiring fine-grained identity validation down to individual workload identities.
  • Use Both when: Enforcing defense-in-depth—tunneling cross-cluster traffic across a secure VPN or mesh overlay, while enforcing strict mTLS inside the tunnel to protect against lateral movement inside compromised networks.

• Operational Fatigue & Pragmatic Implementation: Addresses “security fatigue”—such as the administrative burden of managing PKI certificate lifecycles for mTLS versus key rotation/routing table maintenance for VPNs. It highlights the importance of auditing existing network vulnerabilities and system boundary assumptions before adding complex tunneling layers.

5. Dev.to - How Teleport Works: A Deep Dive into Modern Infrastructure Access

• Introduction to Teleport: Learn about the core Teleport concept and identify the specific challenges traditional bastion hosts and VPNs present before introducing Teleport.
• Key Features & Capabilities: Explores major Teleport features—such as Role-Based Access Control (RBAC) and Just-In-Time (JIT) privilege escalation—supported by hands-on examples to help you understand the solution in detail.
• Trade-offs & Troubleshooting: Details the trade-offs, system limitations, and alternatives, while offering practical guidance for troubleshooting common setup issues.

Technology

1. Medium - PostgreSQL Backup Showdown: pgBackRest vs Barman in Real-World HA Clusters

2. Percona - PostgreSQL Backup Strategies for Enterprise-Grade Environments 🌟 (Recommended)

• PostgreSQL Backup & Disaster Recovery Fundamentals: Database backup strategies are a critical focus area, exploring core concepts like Write-Ahead Log (WAL) archiving to help you architect a resilient Disaster Recovery (DR) strategy for your PostgreSQL clusters.
• Tool Comparisons & Point-in-Time Recovery (PITR): Compares leading PostgreSQL backup solutions—including pgBackRest, Barman, and WAL-G—to help you implement seamless Point-in-Time Recovery (PITR) and establish optimal multi-layered backup strategies ensuring your databases remain ready for instant recovery.

3. pagertree - USE and RED Method 🌟 (Recommended)

4. Youtube - CNCF - The RED Method: How To Instrument Your Services - PDF 🌟 (Recommended)

• Foundational Observability Frameworks (USE vs. RED): While these methodologies are established industry standards, they provide a rock-solid framework for measuring service reliability. The USE method (Utilization, Saturation, Errors) focuses on infrastructure health to quickly diagnose hardware and resource bottlenecks, while the RED method (Rate, Errors, Duration) focuses on request-driven services to diagnose application-level issues.
• Practical Implementation with Prometheus: Both articles demonstrate how to operationalize these concepts using Prometheus, showing you how to correlate infrastructure and application metrics to speed up error detection, optimize overall performance, and protect the user experience.

5. Linkedin - Building a Lightweight, Secure Cluster Monitor with InfluxDB and Grafana

• Building a Lightweight CTF Challenge Infrastructure: A practical guide detailing how to build a budget-friendly Capture The Flag (CTF) platform across a cluster of low-cost VPS instances—covering initial prerequisites, core architecture design, and step-by-step component provisioning.
• Component Wiring & Integrated Observability: Explores how to interconnect all platform components seamlessly and deploy a fully integrated monitoring stack to keep your CTF environment operational, secure, and observable under heavy challenge traffic.

6. smallstep - Grafana for homelab monitoring—with mTLS!

• Grafana Stack Deployment with Internal mTLS Security: A comprehensive tutorial walking through the complete setup of an end-to-end Grafana observability stack, enforcing a zero-trust security architecture across internal communication paths using Mutual TLS (mTLS).
• Encrypted Component Interactivity: Step-by-step guidance on establishing bidirectional certificate authentication and encrypted data transport between telemetry agents and centralized servers—specifically securing log shipping from Promtail to Loki and metrics scraping from Node Exporter to Prometheus.