When destructuring, be explicit about the data that is logged by creating log specific objects (anonymous objects work great): It’s not uncommon for sensitive information to be included in logs because an object that is defined outside of the scope of the logging code is extended. This feature should be used with caution. Serilog supports destructuring, allowing complex objects to be passed as parameters in your logs. Create log specific objects when destructuring Remember, you can always dial up your logging to DEBUG if you need.įinally, rather than adding additional log events to log information at different points in the request lifecycle, favour using Serilog’s diagnostic context feature (discussed below) to collapse contextual information into a single completion log. It’s helpful to establish standards on what events should be logged at INFO level. It’s all too easy to add additional logging during the investigation of complex issues and not clean it up afterwards.īad actors logging excessively can also impact the health of logging systems, which are often shared between teams. You should review your production logs regularly to ensure they provide value. Logs help to reason about your application and diagnose issues. # else return endpoint?.Metadata.GetMetadata()?.RouteName #if NETCOREAPP3_1 return endpoint?.Metadata.GetMetadata()?.EndpointName Throw new ArgumentNullException(nameof(httpContext)) Įndpoint endpoint = ()?.Endpoint Public static string GetMetricsCurrentResourceName( this HttpContext httpContext) The Serilog Timings library provides a convenient way to do this: This is very useful when running applications locally to see application bottlenecks or what is eating into response time. Log every resource-intensive operation such as IO, in your applications, alongside your metrics code. a request failing input validation) you should downgrade the log level to reduce log “noise”. If something becomes normal application behaviour (e.g. Note that the Error level should be reserved for events that you intend to act on. Use Information for log events that would be needed in production to determine the running state or correctness of your application and Warning or Error for unexpected events, such as Exceptions. In almost all cases the level of your logs should be Debug. Beginning and end of time-consuming batch operationsīe generous with your logging but be strict with your logging levels.Any IO or resource intensive operations.When errors or unexpected values are encountered.In general, log key events that provide insight into your application and user behaviour, for example: Many of the above attributes come from Serilog’s own extensions, for example Serilog Timings (used to time operations) and Serilog request logging. The name of component/class from which the log originated The name of the machine on which the application is running The time in milliseconds an operation took to completeĪ hash of the message template used to determine the message type The IP address of the client from which a request originatedĪn ID that can be used to trace the request across multiple application boundaries The name of the application generating the log events Use the following Properties where applicable: ApplicationName Standardising log event properties enables you to get the most out of log search and analysis tools.
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