The Patch Orchestration Application (POA) is now generally available to be deployed to your Ubuntu Linux Service Fabric clusters. POA is a Service Fabric application that allows you to automate OS patching of the VMs/VM instances/nodes of a Service Fabric cluster.
The details on how to download and use this application is available at https://docs.microsoft.com/azure/service-fabric/service-fabric-patch-orchestration-application-linux
The POA downloads OS patches and orchestrates their deployment to all nodes in the cluster without downtime. While applying updates, POA monitors the health of the cluster and if at any time the health policies for the cluster are not met, the patch rollout is stopped.