Thanks to the UKI Brunch & Learn Community for inviting me to discuss Single Node Openshift with Power Systems.
Presentation available here nas01.tallpaul.net/wordpress/...
00:00 Intro
00:47 Agenda
02:06 About Single Node OpenShift
11:52 Installation with scripts
22:16 Installation with Ansible
27:35 Installation with Red Hat Assisted Installer
Let me know if I can be of any help to you.
At a recent UKI Brunch & Learn webinar, I shared valuable insights on Single Node OpenShift (SNO) - a streamlined version of Red Hat’s popular Kubernetes platform that packs all functionality into a single node. Below is a replay recording, a copy of the presentation and the key takeaways:
What is Single Node OpenShift?
• SNO combines control plane and worker node functions into one machine
• Requires minimum 8 vCPUs (1 physical core on POWER), 16GB RAM, 120GB storage
• Generally available on x86 since OpenShift 4.9, on POWER since 4.14
• Fully supported by Red Hat, uses standard OpenShift subscriptions
Use Cases:
• Edge computing deployments
• Retail/store environments
• Development and testing
• Demos and education
Key Benefits:
• Reduced resource requirements vs. multi-node clusters
• Easier to deploy in resource-constrained environments
• Manageable via Red Hat Advanced Cluster Manager
Installation Methods:
• Manual install using Red Hat documentation and custom scripts
• Ansible playbooks (credit to Federico Vagnini for creating these)
• Red Hat Assisted Installer GUI
• Helper node method (not covered in webinar)
Demonstrations
Paul demonstrates two live installations during the webinar:
• Manual script-based install
• Ansible playbook install
Both methods were completed in 30-45 minutes, resulting in fully functional OpenShift clusters.
Limitations to Consider:
• No built-in high-availability
• Cannot expand to multi-node after install
• Limited to single architecture (no multi-arch support)
• For x86, production use requires bare metal (not supported on VMware)
Conclusion
The webinar highlighted SNO’s potential to bring OpenShift’s power to smaller deployments, making containerization more accessible for a wider range of use cases. As organizations look to modernize applications at the edge or in distributed environments, Single Node OpenShift offers a compelling option worth exploring.
For more details on installation methods and configuration, check out Paul’s scripts and the Ansible playbooks referenced in the webinar.
Presentation available here nas01.tallpaul.net/wordpress/...