Debug School: Deepjeet Sen

Integrate Docker and gather metrices using Datadog Agent

Deepjeet Sen — Tue, 18 Apr 2023 11:52:22 +0000

Install Datadog agent (for example in Ubuntu). Then enable process monitoring using the steps mentioned in below link.
https://www.devopsschool.com/blog/how-to-enable-live-process-monitoring-in-datadog-agent/
Install Docker server. For example, follow this link for installing in Ubuntu
https://www.devopsschool.com/blog/how-to-install-docker-in-linux/
Enable Docker integration with Datadog by modifying conf.yaml file located inside /etc/datadog-agent/conf.d/docker.d/. Need to create this file first by making a copy from conf.yaml.default.
Restart the Datadog agent.
Create a few containers as well.
Finally verify whether docker & container metrices are appearing and containers are reporting in Datadog.

List of Top Datadog Agent commands with their usage

Deepjeet Sen — Mon, 17 Apr 2023 11:48:47 +0000

Start agent -
systemctl start datadog-agent

Stop agent -
systemctl stop datadog-agent

Restart agent -
systemctl restart datadog-agent

Check status of agent -
systemctl status datadog-agent

Check version of agent -
datadog-agent version

Check hostname -
datadog-agent hostname

Check health of agent -
datadog-agent health

Check yaml configurations -
more /etc/datadog-agent/datadog.yaml

Check logs -
more /var/log/datadog/agent.log
more /var/log/datadog/process-agent.log
more /var/log/datadog/trace-agent.log

See configurations loaded & resolved of a running agent -
datadog-agent configcheck

Run the specified check -
datadog-agent check

Print the runtime configuration of a running agent -
datadog-agent config

Explained observability by Deepjeet

Deepjeet Sen — Mon, 17 Apr 2023 05:26:27 +0000

What is observability?

Observability means assembling all fragments from logs, monitoring tools and organize them in such a way which gives in-depth knowledge of the whole environment, thus creating an insight. It provides high-level overviews of the system's health as well as granular insights into the implicit failure modes of the system.

How to set up observability for your project?

We have to follow the following steps:

When choosing what to monitor, we should involve business stakeholders and leaders. Our goal should be to monitor what matters to the business and not to overload the whole process.
Metrics, health checks, logs and traces are the essential data types of observability that a system should produce.
The ability to instrument any data type from any source is critical for observability, as it allows us to get telemetry quickly, and resolve issues dynamically as they arise.