Azure Service Fabric is a distributed systems platform that makes it easy to package, deploy, and manage scalable and reliable microservices and containers.
Service Fabric also addresses the significant challenges in developing and managing cloud-native applications. Developers and administrators can avoid complex infrastructure problems and focus on implementing mission-critical, demanding workloads that are scalable, reliable, and manageable.
Service Fabric represents the next-generation platform for building and managing these enterprise-class, tier-1, cloud-scale applications running in containers.
For more info refer to https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-overview