In this chapter, we have explored the ELK Stack overview and its installation. In the ELK Stack, Elasticsearch is used to store logs and service queries from Kibana. Logstash is an agent that runs on each server that you wish to collect logs from. Logstash reads the logs, filters/transforms them, and provides them to Elasticsearch. Kibana reads/queries the data from Elasticsearch and presents it in tabular or graphical visualizations.
We have also explored the use of the correlation ID when debugging issues. At the end of this chapter, we also discovered the shortcomings of a few microservice designs.
The next chapter explains the common problems that are encountered during the development of microservices, as well as their solutions.
