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Chapter 1. Requirements and recommendations

Before you install the multicluster engine for Kubernetes operator, review the following system configuration requirements and settings:

Important: You must install multicluster engine for Kubernetes on a cluster that does not have Red Hat Advanced Cluster Management for Kubernetes earlier than 2.5 installed. The multicluster engine for Kubernetes cannot co-exist with Red Hat Advanced Cluster Management for Kubernetes on versions earlier than 2.5 because they provide some of the same management components. It is recommended that you install multicluster engine for Kubernetes on a cluster that has never previously installed Red Hat Advanced Cluster Management. If you are using Red Hat Advanced Cluster Management for Kubernetes at version 2.5.0 or later then multicluster engine for Kubernetes will already be installed on the cluster with it.

1.1. Supported operating systems and platforms for multicluster engine for Kubernetes clusters and managed clusters

See the following table for supported operating systems:

Platform

Supported for multicluster engine for Kubernetes cluster

Supported for managed cluster

Red Hat OpenShift Container Platform 3.11.200, and later 3.11.x releases

No

Yes

Red Hat OpenShift Container Platform 4.8.2, and later

Yes

Yes

Red Hat OpenShift Container Platform on Amazon Web Services

Yes

Yes

Red Hat OpenShift Container Platform on Microsoft Azure

Yes

Yes

Red Hat OpenShift Container Platform on Google Cloud Platform

Yes

Yes

Red Hat OpenShift Kubernetes Engine

No

Yes

Google Kubernetes Engine (Google GKE) (Kubernetes 1.17, and later)

No

Yes

Amazon Elastic Kubernetes Service (Amazon EKS) (Kubernetes 1.17.6, and later)

No

Yes

Microsoft Azure Kubernetes Service (Microsoft AKS) (Kubernetes 1.19.6, and later)

No

Yes

1.2. Network configuration

Configure your network settings to allow the connections in the following sections:

1.2.1. The multicluster engine for Kubernetes operator cluster networking requirements

For the multicluster engine for Kubernetes cluster networking requirements, see the following table:

DirectionConnectionPort (if specified)

Outbound

API of the cloud provider

 

Outbound

Kubernetes API server of the provisioned managed cluster

6443

Outbound and inbound

The WorkManager service route on the managed cluster

443

Inbound

The Kubernetes API server of the multicluster engine for Kubernetes cluster from the managed cluster

6443

Inbound

Post-commit hook from GitHub to the multicluster engine for Kubernetes cluster. This setting is only required when you use certain application management functions.

6443

1.2.2. Managed cluster networking requirements

For the managed cluster networking requirements, see the following table:

DirectionConnectionPort (if specified)

Outbound and inbound

Kubernetes API server of the multicluster engine for Kubernetes cluster

6443