Red Hat OpenShift Requirements

HARDWARE REQUIREMENTS

Minimum Requirements per Node

  • CPU: 4 virtual CPU cores
  • RAM: 16GB memory
  • Storage: 40GB hard disk space for the file system containing /var/
  • Additional 100GB for container storage

Production Environment Recommendations

  • Control plane nodes: 4 CPU cores, 16GB RAM each
  • Worker nodes: 8 CPU cores, 32GB RAM each
  • Load balancer: 4 CPU cores, 8GB RAM
  • Bootstrap node: 4 CPU cores, 16GB RAM (temporary, only needed during installation)

SUPPORT SOFTWARE VERSIONS

  • Kubernetes: Compatible version shipped with OpenShift
  • Container Runtime: CRI-O
  • Docker registry for container images
  • Compatible web browsers for web console:
    • Chrome/Chromium
    • Firefox
    • Safari
    • Microsoft Edge

FIREWALL REQUIREMENTS

  • Incoming TCP ports: 80, 443, 6443, 22623
  • Outgoing connections allowed to:
    • Red Hat Container Registry
    • Red Hat software repositories
    • DNS servers
    • NTP servers

SOFTWARE REQUIREMENTS

Operating System

  • Red Hat Enterprise Linux CoreOS (RHCOS)
  • Red Hat Enterprise Linux (RHEL) 7.9 or later for worker nodes
  • Supported architectures: x86_64, s390x (IBM Z), ppc64le (IBM Power)

Networking Requirements

  • DNS resolution for all nodes
  • DHCP or static IP configuration
  • Network connectivity between all nodes
  • Minimum network latency: 100ms or less between nodes
  • Default ports required:
    • 6443: Kubernetes API
    • 22623: Machine Config server
    • 443, 80: HTTP/HTTPS for routing
    • 53: DNS (internal)

Additional Requirements

  • Valid Red Hat subscription
  • Internet access for container image registry
  • Persistent storage for container data
  • Load balancer for API and application routing
  • Valid SSL certificates for secure communication

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