Red Hat, the leading provider of open source solutions, has announced that Red Hat OpenShift 4.21 is now generally available. This release is based on Kubernetes 1.34 and CRI-O 1.34. It also integrates with Red Hat OpenShift Platform Plus. Together, they offer a trusted platform for enterprises running production workloads across hybrid clouds. Security and consistency remain central to this release.

Red Hat OpenShift 4.21 supports AI training jobs, containerized microservices, and virtualized applications on the same infrastructure. Enterprises can modernize existing IT systems while accelerating AI innovation. The platform scales automatically based on real-time business demand, reducing wasted resources.

For example, large financial institutions can run legacy virtual machines for core banking alongside AI models for fraud detection. Previously, these workloads existed in separate systems, creating silos and inefficiencies. With OpenShift 4.21, firms can run both on one platform. The new Dynamic Resource Allocation (DRA) operator prioritizes high-end GPUs for AI training and scales them down automatically to save costs.

OpenShift 4.21 also brings enhanced AI features. The Red Hat build of Kueue v1.2 supports KubeFlow Trainer v2 and a Visibility API for pending workloads. Teams can monitor queues, estimate start times, and identify resource bottlenecks. JobSet Operator now enables orchestration of distributed workloads using GitOps workflows and RBAC policies.

GPU allocation is more flexible with DRA. Attribute-based scheduling matches workloads to hardware automatically. Admin access allows monitoring without disrupting allocations. Prioritized alternatives ensure workloads use the best available GPU.

OpenShift 4.21 optimizes core infrastructure. Hosted control planes scale dynamically with VerticalPodAutoscaler (VPA) and can scale to zero during inactivity, reducing idle costs. Integration with VMware Cloud Foundation 9 and Oracle Database Appliance allows hybrid cloud deployment with ease.

Virtualization features let enterprises run VMs and containers on the same platform. Cross-cluster live migration moves VMs without downtime. IPv6-only control planes and secondary networks are now supported. OpenShift Virtualization on Google Cloud bare metal provides direct hardware access for performance-sensitive workloads.

Security is strengthened with Confidential Containers in Microsoft Azure and Azure Red Hat OpenShift. These containers isolate workloads from the cloud provider, hypervisors, and operating systems, ensuring zero-trust protection for sensitive industries. Red Hat OpenShift Lightspeed delivers AI-powered insights to troubleshoot virtual machines efficiently.

Red Hat OpenShift 4.21 delivers a complete, scalable, and secure platform for enterprises. It enables modern AI workloads, hybrid cloud deployments, and virtualization on a single, cost-efficient infrastructure.

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