DEMO Openshift 4 Multicluster

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Introduction:

• In the next demo will see:
  • Deploy two Clusters, named OCPA and OCPB, Openshift 4.11 using Terraform on VMware with UPI.
  • Deploy Red Hat Advanced Cluster Management Foundations in OCPA Clusters.
  • Add OCPB cluster as managed cluster.
  • Set up Submariner in Red Hat Advanced Cluster Management for Kubernetes between both cluster.

Instructions order

1. Requirements.md

• Before to proceded, you will need a loadbalancer and a dns services. This Doc have some examples for HA-proxy and Bind DNS bind files configuration.

2. ReadmeClusterA.md

• This guide will help you to install the Openshift Cluster 4.11 OCPA using Terraform on VMware with UPI.

3. ReadmeClusterB.md

• This guide wil help you to install the Openshift Cluster 4.11 OCPB using Terraform on VMware with UPI.

4. ReadmeClusterManagement.md

   • This guilde will help you to:
     • Install Red Hat Advanced Cluster Management in the cluster OCPA.
     • Add OCPB cluster as managed cluster.

5. ReadmeSubmariner.md

• Set up Submariner in Red Hat Advanced Cluster Management for Kubernetes between both cluster

Notes

• The nodes distribution along VMWare servers is just for Demo proposal. In a production implementation distribute the nodes of the clusters in order to achieve HA.

References

• https://cloud.redhat.com/blog/how-to-install-openshift-4.6-on-vmware-with-upi
• https://github.com/submariner-io/releases/releases
• https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.6/html-single/add-ons/index#submariner
• https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.6/html-single/add-ons/index#submariner-subctl
• https://docs.openshift.com/container-platform/4.11/installing/installing_bare_metal/installing-bare-metal.html
• https://www.maquinasvirtuales.eu/vmware-crear-virtual-machine-con-terraform/
• https://cloud.redhat.com/blog/set-up-an-istio-multicluster-service-mesh-with-submariner-in-red-hat-advanced-cluster-management-for-kubernetes

Next Steps to achieve

• Management observability:

  • https://cloud.redhat.com/blog/how-your-grafana-can-fetch-metrics-from-red-hat-advanced-cluster-management-observability-observatorium-and-thanos

• PV Replication

  • https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.6/html-single/add-ons/index#volsync
    • 1.2. VolSync persistent volume replication service