Rolling updates
A Service Fabric application is a collection of services. Every service, the ones which are part of the Service Fabric framework or the ones which are hosted on it, will require an upgrade at some point in time. To achieve high availability and low downtime of services during upgrades, Service Fabric supports rolling updates. This means that the upgrade is performed in stages. The concept of update domains is used to divide the nodes in a cluster into logical groups which are updated one at a time.
First, the application manifests of the new and existing deployments are compared to identify services which need an upgrade and only the ones requiring an update is refreshed. During the process of an upgrade, the cluster may contain ...
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