Monitoring is essential for the quality of the Azure Functions over a specific period of time. Azure Function Apps provide a simple yet understandable monitoring in the Azure portal itself.

Go to Function Apps, select a specific function, and click on the Monitor link.

Here we can see the success count, error count, function invocation log, and other details:

In Azure Portal, click on the function and select Expand to get logs in a large window, as shown in the following figure.

Upload any new image in the Azure Storage container and wait for the function to be executed successfully:

Once the function is executed successfully, go to the Monitor section and find the updated success count:

We can also set the Daily Usage Quota in the Azure Portal for the Function App. We can set the quota as GB per second:

Go to the Platform features of the Function App and navigate to the Properties link to find the available properties for that specific Function App:

In the Monitoring section, click on Diagnostic logs and enable Application logging, Web server logging, Detailed error messages, and Failed request tracing.

Detailed error messages and Failed request tracing are helpful in troubleshooting.

Click on Save:

In the Monitoring section, click on Log streaming and check Application logs and Web server logs:

In the Monitoring section, Process Explorer provides the process ID for Kudu and the app service in Function Apps:

In the Monitoring section, security scanning with Tinfoil Security is available but for that we need to pay extra:

In the next section, we will discuss Application Insights for monitoring Azure Functions.