The complete Expertflow CX can be deployed in a single node. A single node cluster provides no options of high availability. You may however setup a scheduled backup of the complete solution for disaster recovery. Kubernetes Backup/Restore using Velero
Deployment Prerequisites
Steps
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Setup control-plane RKE2 Control plane Deployment
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Choose the right storage for this single node deployment Storage Solution - Getting Started
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To deploy Expertflow CX on this node, see CX Deployment on Kubernetes