Book Image

Oracle Linux Cookbook

By : Erik Benner, Erik B. Thomsen, Jonathan Spindel
Book Image

Oracle Linux Cookbook

By: Erik Benner, Erik B. Thomsen, Jonathan Spindel

Overview of this book

Discover the power of Oracle Linux 8, the free and enterprise-grade Linux distribution designed for use in any environment, with this recipe-style book. Starting with instructions on how to obtain Oracle Linux for both X86 and ARM-based platforms, this book walks you through various installation methods, from running it as a Windows service to installing it on a Raspberry Pi. It unravels advanced topics such as system upgrades using Leapp for major version transitions and using a PXE server and kickstart files for more advanced installations. The book then delves into swapping kernels to take advantage of Oracle’s UEK, exploring boot options, managing software with DNF, and achieving high availability. Detailed recipes involving security topics will assist with tasks such as data encryption, both at rest and in motion. For developers, it offers guidance on building RPM files, using Docker and Podman in a containerized environment, working with AppStreams, and more. For large-scale deployments, the book introduces Oracle Linux Automation Manager for enterprise-level Ansible utilization, from setting up the Ansible server to basic playbook writing. Finally, you’ll discover strategies for cloud migration. By the end of this book, you’ll possess a comprehensive toolkit that will elevate your skills as a Linux administrator.
Table of Contents (16 chapters)

Load balancing a website

Nowadays, most applications are web-based, whether it’s a traditional web interface or a RESTful API. This first tier is typically set up for HA using a load balancer. A load balancer is a system that distributes incoming network traffic or workload across multiple servers or resources. Its main goal is to optimize resource utilization, improve performance, and ensure the reliability and availability of applications or services. When multiple servers are involved in serving a particular application or service, a load balancer acts as an intermediary between the client and the server pool. It receives incoming requests from clients and intelligently distributes them across the available servers based on various algorithms, such as round-robin, least connections, or weighted distribution.

The load balancer is responsible for ensuring the servers’ optimal health and performance by redirecting traffic from overloaded or problematic servers. This...