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Raymond Ops
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Raymond Ops

Linux ops automation, cloud-native, Kubernetes, SRE, DevOps, Python, Golang and related tech discussions.

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Recent Articles

Latest from Raymond Ops

100 recent articles max
Raymond Ops
Raymond Ops
Apr 16, 2026 · Operations

Mastering Nginx 502/504 Errors: A Complete Troubleshooting Guide with Scripts

This comprehensive guide explains the differences between Nginx 502 and 504 errors, provides step‑by‑step troubleshooting procedures, detailed configuration examples, one‑click diagnostic scripts, real‑world case studies, best‑practice optimizations, monitoring setups, and advanced learning paths to help you quickly resolve gateway issues and improve server reliability.

502504Monitoring
0 likes · 26 min read
Mastering Nginx 502/504 Errors: A Complete Troubleshooting Guide with Scripts
Raymond Ops
Raymond Ops
Apr 11, 2026 · Operations

Why TCP’s Three‑Way Handshake Matters: Deep Dive into States, Tuning, and Real‑World Pitfalls

This article explains the TCP three‑way handshake in depth, covering the state machine, kernel‑level packet analysis, performance tuning, security hardening, real‑world case studies such as SYN‑Flood mitigation and TIME_WAIT overload, and provides complete C and Python examples, monitoring metrics, troubleshooting steps, and backup procedures for production environments.

LinuxNetworkingPerformance
0 likes · 28 min read
Why TCP’s Three‑Way Handshake Matters: Deep Dive into States, Tuning, and Real‑World Pitfalls
Raymond Ops
Raymond Ops
Mar 26, 2026 · Cloud Native

How to Shrink Docker Images by 70% and Harden Them with Trivy

This guide explains how to dramatically shrink Docker image sizes by up to 70% using multi‑stage builds, Alpine or Distroless bases, layer merging, .dockerignore, and BuildKit, while also integrating Trivy security scanning, non‑root users, SUID removal, and CI/CD automation to ensure a lean, secure container deployment.

AlpineCI/CDDocker
0 likes · 29 min read
How to Shrink Docker Images by 70% and Harden Them with Trivy
Raymond Ops
Raymond Ops
Mar 19, 2026 · Operations

Zero‑Downtime HAProxy Load Balancing: Complete L4/L7 Deployment Guide

This guide walks through installing HAProxy 2.x, configuring L4 TCP and L7 HTTP/HTTPS load balancing for web, MySQL, and Redis, setting up health checks, session persistence, monitoring, high‑availability with Keepalived, performance tuning, security hardening, and step‑by‑step zero‑downtime deployment and rollback procedures.

HAProxyZero Downtimehealth checks
0 likes · 36 min read
Zero‑Downtime HAProxy Load Balancing: Complete L4/L7 Deployment Guide
Raymond Ops
Raymond Ops
Mar 17, 2026 · Operations

Boost Nginx Performance: 10‑Minute Guide to Reverse Proxy Timeout and Connection Pool Tuning

This step‑by‑step guide shows how to optimize Nginx reverse‑proxy timeouts and enable connection‑pool reuse on Linux servers, covering prerequisites, configuration changes, kernel tuning, load‑testing, monitoring with Prometheus, security hardening, troubleshooting, rollback procedures, and best‑practice recommendations.

Connection PoolMonitoringNginx
0 likes · 26 min read
Boost Nginx Performance: 10‑Minute Guide to Reverse Proxy Timeout and Connection Pool Tuning
Raymond Ops
Raymond Ops
Mar 16, 2026 · Operations

Master Linux Disk Management & I/O Performance: A Hands‑On Guide from Expansion to Tuning

This comprehensive guide walks you through Linux disk space shortage scenarios, prerequisites, a quick checklist, step‑by‑step LVM and partition expansion, I/O scheduler tuning, fio benchmarking, kernel parameter optimization, Prometheus monitoring, security hardening, backup strategies, troubleshooting, and best‑practice recommendations for reliable disk management and performance.

I/O PerformanceLVMLinux
0 likes · 29 min read
Master Linux Disk Management & I/O Performance: A Hands‑On Guide from Expansion to Tuning
Raymond Ops
Raymond Ops
Mar 16, 2026 · Cloud Native

Master Kubernetes Pod Lifecycle and Restart Policies – From Creation to Graceful Termination

This guide walks through Kubernetes pod lifecycle phases, container states, restartPolicy options, health‑check probes, lifecycle hooks, init containers, common troubleshooting scenarios such as CrashLoopBackOff, Pending and Stuck Terminating, and provides best‑practice recommendations for configuration, graceful shutdown, resource limits and monitoring.

Health probesInit containersKubernetes
0 likes · 15 min read
Master Kubernetes Pod Lifecycle and Restart Policies – From Creation to Graceful Termination
Raymond Ops
Raymond Ops
Mar 12, 2026 · Operations

How to Supercharge Prometheus: Proven Techniques to Slash Memory and Query Latency

This article shares real‑world experiences and step‑by‑step practices for optimizing Prometheus performance, covering metric pruning, scrape interval tuning, storage engine tweaks, query acceleration, federation architecture, and future observability trends to keep monitoring systems reliable at scale.

MonitoringPrometheuscloud-native
0 likes · 11 min read
How to Supercharge Prometheus: Proven Techniques to Slash Memory and Query Latency
Raymond Ops
Raymond Ops
Mar 11, 2026 · Information Security

How to Secure Containers: Complete Guide to Image Scanning and Zero‑Trust Runtime Protection

This comprehensive guide walks you through securing production container environments by covering image vulnerability scanning with Trivy, image signing with Cosign, Kubernetes hardening with SecurityContext and Pod Security Admission, runtime protection using Falco, network isolation via NetworkPolicy, and continuous monitoring with Prometheus, complete with scripts, CI/CD integration, and troubleshooting tips.

0 likes · 35 min read
How to Secure Containers: Complete Guide to Image Scanning and Zero‑Trust Runtime Protection