Services that were originally designed to run as a single-instance are unable to be run within a high availability model, which is expected in a clustered environment. Presented herein are techniques through which single-instance services can be converted into multi-instance services without any changes to their binary service logic. This provides an immediate benefit in providing a higher level of availability for any Kubernetes single-instance service.
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Kuik, Tim and Chou, Matthew, "METHOD TO PROVIDE ACTIVE/STANDBY LOGIC FOR KUBERNETES SINGLE-INSTANCE SERVICES", Technical Disclosure Commons, (December 07, 2021)