Kubernetes 1.31 maintenance traps and OpenShift security friction

New Relic stopped support for Kubernetes 1.31 and earlier on October 5, 2026. This follows the fact that Kubernetes 1.31 reached its end of life on November 11, 2025. If teams move to a newer version, they may assume all maintenance issues disappear, but the operational tax remains high. OpenShift handles cluster upgrades through a coordinated, over-the-air process that patches the underlying node operating system. This is a major difference from plain Kubernetes, where engineers must manage Kubernetes version upgrades and node OS patching on their own. If you move from a custom Linux distribution to OpenShift, you are limited to RHEL or RHCOS. I see many teams struggle with the security defaults of OpenShift because it is secure by default. The platform uses Security Context Constraints to restrict what a Pod can request. The restricted-v2 SCC prevents containers from running as root. Many third-party images from Docker Hub fail on OpenShift because they require root access or specific Linux capabilities. Teams attempting to run container images that assume root access often encounter deployment failures on OpenShift because the default restricted-v2 Security Context Constraint drops all Linux capabilities before the pod even reaches a node. Kubernetes 1.31 also brought stable AppArmor support and improved ingress connectivity reliability for kube-proxy. New beta features like Multiple Service CIDRs and the VolumeAttributesClass API arrived in this release. Additionally, the Persistent Volume last phase transition time feature is now GA. For networking, OpenShift uses OVN-Kubernetes as its default SDN, whereas Kubernetes lets you choose Calico, Flannel, Cilium, or Weave. When a node is degraded, the Machine Config Operator replaces the RHCOS node entirely rather than patching it in place.

Orchestration complexity and workload types

Nomad is a lightweight scheduler that is a single 150MB binary. It is a modular component that delegates responsibilities to tools like Consul for networking and Vault for secrets. This is a direct contrast to Kubernetes, which is a complete platform that wants to control the entire infrastructure. Kubernetes has an internal DNS and an Ingress API that requires third-party controllers to route external traffic. Engineers managing the control plane and the etcd database face a high operational tax. Many teams use managed services like EKS or GKE to handle master nodes, but they still must configure network meshes and security policies. Kubernetes APIs are frequently updated or deprecated, which requires engineers to constantly audit deployment manifests to avoid breaking changes. Nomad is a pragmatic bridge for companies with technical debt. It runs modern Docker containers alongside legacy Java applications and Windows IIS web servers. It even works on ARM-based single board computers and Windows industrial PCs. Companies such as Cloudflare, SAP, and eBay use Nomad for its efficiency. This capability is why Nomad is a powerhouse for edge computing. Kubernetes is primarily container-centric, which makes it difficult to manage non-containerized code. Kubernetes relies on PodSecurity admission for cluster-level policy, which you must configure yourself per namespace. You should consider your engineering bandwidth before you decide to run a massive Kubernetes cluster. Why do teams fight the weight of a heavy platform when a single binary works?

The cost of scaling and management

Infrastructure costs vary based on the platform. OpenShift is a paid subscription that scales with the number of vCPUs. Managed services like ROSA and ARO provide 99.95% uptime SLAs and handle the control plane. On IBM Cloud, OpenShift provides a 99.99% uptime SLA. For small teams, the cost of a Red Hat subscription is hard to justify against EKS or GKE. AWS EKS charges a fixed hourly fee of roughly $0.10 per cluster. Kubernetes is free, but you must pay for the security, logging, and monitoring tools you assemble. OpenShift includes an integrated registry and uses ImageStreams to track changes. It also includes Prometheus and Grafana for cluster health. OpenShift provides a web console with a topology view and distinct developer and administrator perspectives. Managed Kubernetes like Azure AKS absorbs the control plane cost for the standard tier. Nomad is resource-efficient. It allows for higher container density and runs on cheaper hardware because it lacks a heavy control plane. This makes Nomad the cheaper choice for smaller clusters or multi-region deployments where managed Kubernetes fees accumulate. You should evaluate your engineering payroll alongside your compute bill.