Now, the OMS Log Analytics is integrated with VMSS.
Add the Storage account to Log Analytics workspace where Service Fabric Events are stored which is configured under the VMSS.
Select the resource ServiceFabric(testmonitor)
In Overview you see tiles in the form of a graph for each of the solutions enabled, including one for Service Fabric. Click the Service Fabric graph to continue to the Service Fabric Analytics solution.
The following image shows the home page of the Service Fabric Analytics solution. This home page provides a snapshot view of what's happening in your cluster.
Please refer to below article for the useful Kusto queries for events like: Node down, Node Up or Application Health events etc.,