Day 1:Datadog

What is Observability and its advantage?

Observability is ability to measure systems current state based on logs, events and metrics.
Observability helps us in understanding whay and what has happened to the system and what can be done to prevent that from happening again.

Difference between Observability Monitoring?

Observability can ask questions based in hypothesis.
Monitoring can ask questions based on dashboard.
Observability is a superset while monitoring is a subset of observability.
Monitoring tells us what is wrong while observability tells us why isit wrong.
Observability is useful is dynamic environment whereas Monitoring is useful is static environment.

What is Datadog?

Datadog is a service which provides monitoring for applications ,data, servers through SAAS .
It can be used to visualize data, explore metrics, manage logs etc.

What is Datadog Agent and How it works?

It collects metrics and events from systems and apps and sends them to Datadog, where you can analyze your monitoring and performance data.

Component of Datadog Agent and short intro for each

Collector : It gathers all metrics every 15 seconds,
Forwarder : It send metrics over HTTPS to Datadog
DogStatsD :It is a deamon which accepts metrics, events, and service checks over UDP and periodically aggregates and forwards them to Datadog.

1 Top 10 commands of Datadog Agent

systemctl stop datalog-agent
systemctl start datalog-agent
datalog-agent health
datalog-agent version
datalog-agent status
datalog-agent hostname
ystemctl restart datadog-agent
systemctl status datadog-agent
datalog-agent launch-gui
datalog-agent check
datalog-agent help

2 Locate how to enable Process monitoring in datadog.yaml?

in the yaml file :
process_agent_enabled: true

3 Top 5 Techniques for troubleshooting Datadog Agent

1. Check Api key 2.check site name 3.Check the service status of datadog agent, trace, process agent. 4.check the agent logs 5.check connectivity to the agent with datadog-agent info, and there check status field.