Compute Instance
The purpose of this chapter is to provide a basic understanding of the Oracle Cloud Infrastructure (OCI) Compute service. The OCI compute service is an important cloud service that is used to provision virtual or “bare-metal” instances.
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Compute Instance The purpose of this chapter is to provide a basic understanding of the Oracle Cloud Infrastructure (OCI) Compute service. The OCI compute service is an important cloud service that is used to provision virtual or “bare-metal” instances. Compute instances can be used for different purposes, such as running an Apache Tomcat web server, a Docker engine, a manually installed Oracle Database, or any other application that you would install on your on-premise servers. Before launching a Compute Instance, you will need to have a virtual cloud network (VCN), an SSH key (for Linux), and other information like availability domain, software image, and the instance shape you would like to use. An image is a predefined set of software applications including the operating system and other applications packaged together. There are a variety of images to choose from: •
Platform images (Linux, Windows)
•
Oracle images
•
Partner images
•
Custom images, including “bring your own” images
Images are discussed in the following section. The shape determines the type of the machine (bare metal or virtual machine), type of processor, the number of CPU, RAM, type of storage, and networking information associated with the new instance. The various shapes will be described later in this chapter.
Images A virtual machine image is a single file that contains a bootable operating system. The simplest image is the operating system only, which we will refer to as a platform image. We also have access to more complex images that contain the operating system along with a set of applications. 57 © Adrian Png and Luc Demanche 2020 A. Png and L. Demanche, Getting Started with Oracle Cloud Free Tier, https://doi.org/10.1007/978-1-4842-6011-1_4
Chapter 4
Compute Instance
Oracle Platform Images Oracle has a list of platform images that use different operating systems such as Oracle Linux, CentOS, Ubuntu, and Windows Server. At the time of writing this book, Oracle published the following platform images: Image
Operating System Description Version
Oracle Autonomous Oracle Linux 7 Linux
Autonomous Linux automates live patching using Ksplice. This operating system is highly secure and reliable.
Oracle Linux Oracle Linux 6, 7 Unbreakable Linux and 8
Unbreakable Enterprise Kernel (UEK) is an optimal kernel for Oracle workload.
CentOS
6 and 7
A free, open source Linux distribution.
Ubuntu
16.04, 18.04 and 20.04
A free, open source Linux distribution. Uses smaller boot volume, boots faster.
Windows Server
Windows 2012 R2 Windows 2012 R2, 2016 and 2019 are supported to run Windows 2016 and production workload on OCI. Windows 2019
Note Oracle updates their images every month to include new patches and software fixes. Windows Server images are not “Always Free Eligible”.
Oracle Images Oracle also publishes more complex images that contain more than just the operating systems. These are prebuilt enterprise images and solutions. For example, you can provision a new instance using an image that runs “Oracle Enterpri
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