5. Observability on Application Migration and Modernization Techlab

5.1 Application Monitoring

Mon, 01 Jan 0001 00:00:00 +0000

Collecting Application Metrics

When running applications in production, a fast feedback loop is a key factor. The following reasons show why it’s essential to gather and combine all sorts of metrics when running an application in production:

to make sure that an application runs smoothly
to be able to see production issues and send alerts
to debug an application
to make business and architectural decisions
metrics can also help to decide on how to scale applications

Application Metrics provide insights into what is happening inside our Quarkus Applications using the MicroProfile Metrics specification.

5.2 Tracing

Mon, 01 Jan 0001 00:00:00 +0000

Tracing

When it comes to large distributed cloud native system with many different components involved, debugging production issues or even finding a way to display how components interact with each other becomes quite hard and tricky.

This is where tracing comes into the picture. Tracing allows us to collect all sorts of requests in a group of requests, which somehow belong together to a single business transaction. In our Quarkus applications, we use Eclipse MicroProfile OpenTracing to collect the tracing data and Jaeger as a component where those traces are sent to and been visualised for further analysis.