Virtual machine workloads are migrating to KubeVirt and OpenShift Virtualization at a rapid pace. Understanding how to securely access datacenter networks directly from pods will be critical to a successful migration. Read on to learn how OVN-Kubernetes, NMstate, and Multus work together to enable traditional architecutres in a cloud-native way.
The OpenShift networking stack, including the OVN-Kubernetes CNI, Cluster Network Operator, NMState operator, and FRR-K8s is very flexible, but it may not always be obvious how the pieces fit together to form a solution.
OVN Recon is an OpenShift Console plugin built to make the connections that help develop your mental model for understanding OpenShift networking.
Storing Virtual Machines as Kubernetes resources in git for automated deployment promotes consistency, resilency, and accountability, but commiting secrets to git is risky and should be avoided. Use the External Secrets Operator to securely store cloud-init and other data, and sleep soundly!
CoreOS On-cluster Image Layering added in OpenShift 4.19 allows modifications to the node operating system. This detailed walk through customizes the node operating system image by adding RPMs to support autofs.
In part 2 we will configure autofs and enable automatic filesystem mounting across cluster nodes.
Copyright (c) 2021, Dale Bewley; all rights reserved.
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