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Chapter 1 Oracle Cloud Native Environment Host Requirements

This chapter describes the hardware and operating system requirements for the hosts in Oracle Cloud Native Environment.

1.1 Hardware Requirements

Oracle Cloud Native Environment is a clustered environment that requires more than one node to form a cluster. Your environment should consist of two or more systems where Oracle Cloud Native Environment is installed.

You can install Oracle Cloud Native Environment on any of the following server types:

  • Bare-metal server

  • Oracle Linux Kernel-based Virtual Machine (KVM) instance

  • Oracle Cloud Infrastructure bare-metal instance

  • Oracle Cloud Infrastructure virtual instance

  • Oracle Private Cloud Appliance virtual instance

  • Oracle Private Cloud at Customer virtual instance

Oracle Cloud Native Environment is available for 64-bit x86 hardware only.

Oracle Cloud Native Environment does not require specific hardware; however, certain operations are CPU and memory intensive. For a list of certified bare-metal servers, see the Oracle Linux Hardware Certification List at:

https://linux.oracle.com/hardware-certifications

For information on the current Oracle x86 Servers, see:

https://www.oracle.com/servers/x86/

For information on creating an Oracle Linux KVM instance, see Oracle® Linux: KVM User's Guide.

The installation instructions for Oracle Private Cloud Appliance and Oracle Private Cloud at Customer, as well as information about the Oracle Cloud Native Environment releases that can be installed, are available in the Oracle Private Cloud Appliance and Oracle Private Cloud at Customer documentation at:

https://docs.oracle.com/en/engineered-systems/private-cloud-appliance/

The hardware requirements listed here are for the absolute minimum to run Oracle Cloud Native Environment. Your deployment is highly likely to require nodes with a larger footprint.

1.1.1 Kubernetes Control Plane Node Hardware

The Kubernetes control plane is the container orchestration layer that exposes the Kubernetes API and interfaces to create and manage the lifecycle of containers. The nodes that form the Kubernetes control plane are referred to as control plane nodes. A control plane node is a host that runs the daemons and services needed to manage the cluster and orchestrate containers, such as the Oracle Cloud Native Environment Platform Agent, etcd, the Kubernetes API Server, Scheduler, Controller Manager, and Cloud Controller Manager.

A minimum Kubernetes control plane node configuration is:

  • 4 CPU cores (Intel VT-capable CPU)

  • 16GB RAM

  • 1GB Ethernet NIC

  • XFS file system (the default file system for Oracle Linux)

  • 40GB hard disk space in the /var directory

1.1.2 Kubernetes Worker Node Hardware

A Kubernetes worker node is a host that runs the daemons and services needed to run pods, such as the Platform Agent, kubelet, kube-proxy, CRI-O, RunC and Kata Runtime.

A minimum Kubernetes worker node configuration is:

  • 1 CPU cores (Intel VT-capable CPU)

  • 8GB RAM

  • 1GB Ethernet NIC

  • XFS file system (the default file system for Oracle Linux)

  • 15GB hard disk space in the /var directory

1.1.3 Operator Node Hardware

An operator node is a host that contains the Oracle Cloud Native Environment Platform Command-Line Interface. This node may also likely include the Oracle Cloud Native Environment Platform API Server.

A minimum operator node configuration is:

  • 1 CPU cores (Intel VT-capable CPU)

  • 8GB RAM

  • 1GB Ethernet NIC

  • 15GB hard disk space in the /var directory

1.1.4 Kubernetes High Availability Requirements

A minimum high availability (HA) configuration for a Kubernetes cluster is:

  • 3 Kubernetes control plane nodes. At least 5 control plane nodes is recommended.

  • 2 Kubernetes worker nodes. At least 3 worker nodes is recommended.

Important

The number of control plane nodes must be an odd number equal to or greater than three, for example, 3, 5, or 7.

1.1.5 Istio Requirements

A minimum configuration for deploying the Istio module for Oracle Cloud Native Environment is:

  • 1 Kubernetes control plane node

  • 2 Kubernetes worker nodes

These requirements are the minimum needed to successfully deploy Istio into a Kubernetes cluster. However, as your cluster expands and more nodes are added, Istio requires additional hardware resources. For information on the hardware requirements of Istio, see the upstream documentation at: https://istio.io/latest/docs/ops/deployment/performance-and-scalability/.

1.2 Operating System Requirements

Oracle Cloud Native Environment is available for the following operating systems:

  • Oracle Linux 8 (x86_64) running the Unbreakable Enterprise Kernel Release 6 (UEK R6). A minimum of Oracle Linux 8.3 is required.

  • Oracle Linux 7 (x86_64) running the Unbreakable Enterprise Kernel Release 6 (UEK R6). A minimum of Oracle Linux 7.5 is required.

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