BOSTON — Enterprise purchasing decisions for DevOps platforms now emphasize layers of infrastructure beyond Kubernetes, expanding opportunities but upping the ante for Red Hat OpenShift product development. Red Hat faces competitive pressure from public cloud providers that continue to add developer-friendly features to managed Kubernetes services. But enterprise customers presenting at this week’s Red Hat Summit said they kept OpenShift as they added public cloud deployments in recent years because of its advanced security features and access to Red Hat professional services for refactoring legacy applications. “[Azure Red Hat OpenShift] had the same look and feel as OpenShift on…