Vengala Vinay

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Upgrading Apache HTTP Server from version 2.4.57 to the latest security patch on openSUSE Leap 15.5 without breaking virtual hosts

Assessing the Current Apache State on openSUSE Leap 15.5 Before initiating any upgrade, a thorough understanding of the existing Apache HTTP Server configuration is paramount. This includes identifying the exact version, installed modules, and the structure of your virtual host definitions. On openSUSE Leap 15.5, Apache is typically managed via `systemd` services and its configuration […]

Upgrading a multi-node Redis replication cluster on RHEL 9: Pre-flight failover validation runbooks

Pre-Upgrade Validation: Redis Replication Cluster Failover Readiness Before embarking on a Redis replication cluster upgrade on RHEL 9, a critical prerequisite is validating the failover mechanism. A robust failover strategy ensures minimal downtime and data loss during maintenance. This document outlines a series of pre-flight checks and runbooks designed to confirm the health and readiness […]

Upgrading Nginx from mainline repository to the latest stable branch on Ubuntu 24.04 LTS: Zero-downtime configuration validations

Assessing the Current Nginx Installation Before initiating any upgrade, it’s paramount to understand the existing Nginx version and its installation source. On Ubuntu, Nginx is typically installed from either the official Ubuntu repositories or a third-party repository, most commonly the official Nginx mainline or stable repository. We’ll start by identifying the installed version and its […]

Upgrading a high-traffic production PostgreSQL database cluster from version 15 to 16 using pg_upgrade link mode on Debian 12

Pre-Upgrade Assessment and Preparation Before embarking on a major PostgreSQL version upgrade, a thorough assessment of the existing cluster is paramount. This involves understanding the current resource utilization, identifying any deprecated features or extensions that might not be compatible with PostgreSQL 16, and establishing a robust rollback strategy. For a high-traffic production environment, minimizing downtime […]

Upgrading PHP 8.2 to 8.3 on Rocky Linux 9: Re-compiling APCu, Imagick, and Memcached extensions safely

Prerequisites and Initial Assessment Before embarking on the PHP upgrade from 8.2 to 8.3 on Rocky Linux 9, a thorough assessment of your current environment is paramount. This includes identifying all installed PHP extensions, their compilation methods (e.g., PECL, distribution packages), and any custom configurations. Understanding dependencies is crucial to avoid service disruptions. We’ll assume […]

Installing and Setting up a Local Composer Mirror Server on RHEL 9 to accelerate internal developer deployment loops

Prerequisites and Initial Setup This guide details the installation and configuration of a local Composer mirror server on Red Hat Enterprise Linux 9 (RHEL 9). The primary objective is to significantly accelerate internal developer deployment loops by reducing external network latency and dependency on public repositories. This setup is crucial for enterprises with strict security […]

Installing and Setting up a Secure multi-port PgBouncer connection pooler on Debian 12 Bookworm for PostgreSQL 16

Prerequisites and Initial Setup This guide assumes you have a Debian 12 (Bookworm) server with PostgreSQL 16 already installed and running. We’ll be installing PgBouncer from the official Debian repositories for simplicity and stability. Ensure your PostgreSQL server is accessible from the PgBouncer host. For this setup, we’ll configure PgBouncer to listen on multiple ports, […]

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