What is 360-Degree Domain Mastery in Monitoring Processes?
You can think of the services, applications, and platforms serving internal or external customers as pieces completing a puzzle. When you only monitor one piece of the big picture, you are likely to miss something from the other parts.
For this reason, when you monitor detailed metrics of all your platforms (such as SQL and NoSQL databases, message queuing structures, container orchestrations, load balancers, servers, etc.), dashboarding, proactive monitoring, the performance of your applications, and logs, and receive the right alarms from here, you achieve 360-degree domain mastery.
In short, we monitor every piece of the puzzle at every level. Let's delve into the details of these steps.
Metric Monitoring
For this task, Prometheus, a CNCF project, is commonly used. However, InfluxDB is also among the options. These tools are fundamentally time series databases. They store the data they collect in a sharding structure suitable for the time series model. Prometheus has agents called exporters. You can collect data by installing an exporter on the target from which you will collect metrics. It is widely used and beneficial in platforms like NoSQL, SQL, web servers, load balancers, queuing structures. If you want to derive alarms from Prometheus, you can easily do so with the alert manager plugin.
Dashboarding
Collecting metrics and creating meaningful dashboards from this data, in short, visualizing this data will greatly contribute to you. Grafana has become the industry standard for this purpose. Alternatively, you can use Kibana from Elastic. In Grafana, there are many ready-made templates, or you can create your own custom template.
Proactive Monitoring
For some of your services or environments, measuring simple metrics like "1" or "0" is critical. In such monitoring, for issues like whether the server's network is up or down, you can use Zabbix, PRTG, Nagios.

Application Performance Monitoring
Measuring the performance of the applications and services you develop, and capturing application-level errors is critical. You can achieve quite successful results in this area with tools like New Relic, DataDog, AppDynamics. For example, if a method inside the application goes to the database unnecessarily 50 times and creates a bottleneck, you can detect this with APM.
Logging
One of the most important steps in detecting problems in platforms, applications, and services is to collect and manage logs in a centralized manner.
When there is a problem in any platform, it can explain its issues through logs. If you create alarms based on error logs, you can quickly detect the problem. ELK stack or Graylog is commonly used for centralized log management.
Conclusion
When you achieve 360-degree domain mastery, you can elevate the accessibility of your environments to the next level more comfortably. If you do not make the problems visible, the level of awareness will decrease, and you will find yourself in a deadlock when problems arise. With 360-degree domain mastery, you can make every point visible and ensure continuous improvement.