High Availability Single Node Openshift Setup Operator
Provide the ability for exactly two Single Node OpenShift clusters to operate as a predefined pair in an active-passive or active-active configuration, detect when its peer has died and automatically take over its workloads after ensuring it is safe to do so.
Motivation
Some companies have a need for a highly available container management solution that fits within a reduced footprint.
The hardware savings are significant for customers deploying many remote sites (kiosks, branch offices, restaurant chains, etc), most notably for edge computing and RAN specifically.
The physical constraints of some deployments prevent more than two nodes (planes, submarines, satellites, and also RAN).
Some locations will not have reliable network connections or limited bandwidth (once again submarines, satellites, and disaster areas such as after hurricanes or floods)
Pre-requisites
2 SNO Clusters.
Deployments that will be managed by HA Layer already exist.
Installation
Deploy This operator to each SNO cluster.
Load the yaml manifest of the HASNO (for each SNO cluster).
Assumptions
CRs will be updated simultaneously on both clusters by a config management tool - for example ACM (in case no such tool is used it should be done manually by the user).