Book Image

Migrating Linux to Microsoft Azure

By : Rithin Skaria, Toni Willberg
Book Image

Migrating Linux to Microsoft Azure

By: Rithin Skaria, Toni Willberg

Overview of this book

With cloud adoption at the core of digital transformation for organizations, there has been a significant demand for deploying and hosting enterprise business workloads in the cloud. Migrating Linux to Microsoft Azure offers a wealth of actionable insights into deploying Linux workload to Azure. You'll begin by learning about the history of IT, operating systems, Unix, Linux, and Windows before moving on to look at the cloud and what things were like before virtualization. This will help anyone new to Linux become familiar with the terms used throughout the book. You'll then explore popular Linux distributions, including RHEL 7, RHEL 8, SLES, Ubuntu Pro, CentOS 7, and more. As you progress, you'll cover the technical details of Linux workloads such as LAMP, Java, and SAP, and understand how to assess your current environment and prepare for your migration to Azure through cloud governance and operations planning. Finally, you'll go through the execution of a real-world migration project and learn how to analyze and debug some common problems that Linux on Azure users may encounter. By the end of this Linux book, you'll be proficient at performing an effective migration of Linux workloads to Azure for your organization.
Table of Contents (8 chapters)

Common Linux runtime challenges

In this section, we will demonstrate how to analyze and fix some common runtime problems. One of the most common issues with applications on Linux is incompatibility with SELinux settings, especially if you migrate your application from one VM to another.

Also, issues with disk space running out or other storage issues such as storage encryption in conjunction with migration may be troublesome. Lastly, some unexpected performance issues may arise when you move workloads from on-premises to Azure. Let's start by looking at how SELinux works in Azure.

SELinux

Security-Enhanced Linux—more commonly known as SELinux—is a security module for the Linux kernel, which provides a mechanism for supporting various access control policies to the operating system. There are some alternatives to SELinux, such as AppArmor, but they are not commonly used currently. SELinux can be considered the standard way of securing Linux installations...