What is Dadatog

Datadog is a data observability service for cloud-scale applications, providing monitoring of servers, databases, tools, and services, through a SaaS-based data analytics platform.

DataDog Architecture

Agent: The agents are installed on the nodes and the report the information to datadog

Datadog: it process the information that is coming from nodes, create dashboard and send notification to you alerting system like slack, email and so on when things goes wrong

Agent Architecture

Collector: gather metrics from nodes or servers or gather all the servers information.

DogstatsD: collection information from your application

SupervisorD: this is like a manager that keeps everything up and running.

Forwarder: it send the information that it collects from servers or nodes to datadog in the cloud which create dashboard and send alerts out.

Basic Agent Usage

Basic Agent Usage for CentOS

Getting Started

• Get started with Datadog or here

• Login

• Datadog free trial is only for 5 hosts

Basic Agent Usage HERE

datadog-agent --help
datadog-agent version
datadog-agent config
datadog-agent stop
datadog-agent status

Metrics and Host Monitor here

CPU load is very high on {{host.name}} @slack-pipeline-test

The CPU load on {{host.name}}({{host.ip}}) is {{value}}, which is above the set limits @slack-team

The host {{host.name}}({{host.ip}}) is down
Host {{host.name}} is down. Please investigate now and take action @slack-pipeline-test

Datadog pricing

Plans to fit your scale here

Datadog start and stop

systemctl status datadog-agent
systemctl start datadog-agent
systemctl stop datadog-agent
systemctl restart datadog-agent

Start Datadog

docker run -d --name dd-agent -v /var/run/docker.sock:/var/run/docker.sock:ro -v /proc/:/host/proc/:ro -v /sys/fs/cgroup/:/host/sys/fs/cgroup:ro -e DD_API_KEY=xxxxxxxxxxxxxxxxxxxxxxxxxxx -e DD_SITE="datadoghq.com" gcr.io/datadoghq/agent:7

Datadog config file and integrations

1. agent configuration file

cd /etc/datadog-agent/
ls /etc/datadog-agent/conf.d

2. Integrations

cat /etc/datadog-agent/datadog.yaml

All check enable in the config file. Below check are enable by default

datadog-agent configcheck

root@ip-172-31-12-205:~# datadog-agent configcheck
=== cpu check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/cpu.d/conf.yaml.default
Instance ID: cpu:d884b5186b651429
{}
~
===
=== disk check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/disk.d/conf.yaml.default
Instance ID: disk:e5dffb8bef24336f
use_mount: false
~
===
=== file_handle check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/file_handle.d/conf.yaml.default
Instance ID: file_handle:d884b5186b651429
{}
~
===
=== io check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/io.d/conf.yaml.default
Instance ID: io:d884b5186b651429
{}
~
===
=== load check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/load.d/conf.yaml.default
Instance ID: load:d884b5186b651429
{}
~
===
=== memory check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/memory.d/conf.yaml.default
Instance ID: memory:d884b5186b651429
{}
~
===
=== network check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/network.d/conf.yaml.default
Instance ID: network:d884b5186b651429
{}
~
===
=== ntp check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/ntp.d/conf.yaml.default
Instance ID: ntp:d884b5186b651429
{}
~
===
=== uptime check ===
Configuration provider: file
Configuration source: file:/etc/datadog-agent/conf.d/uptime.d/conf.yaml.default
Instance ID: uptime:d884b5186b651429
{}
~
===

Some datadog commands

$ D_AGENT_MAJOR_VERSION=7 DD_API_KEY=235e1f4c8617fb97badsadaddc36 DD_SITE="datadoghq.com" bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_script.sh)"

$ systemctl start datadog-agent
$ systemctl stop datadog-agent
$ systemctl restart datadog-agent
$ systemctl status datadog-agent

$ ls /var/log/datadog/
$ more /etc/datadog-agent/datadog.yaml
$ more /var/log/datadog/agent.log
$ more /var/log/datadog/process-agent.log
$ more /var/log/datadog/trace-agent.log
$ datadog-agent configcheck
$ datadog-agent config
$ datadog-agent health
$ datadog-agent hostname
$ datadog-agent version

Create a stress

docker run -d --rm progrium/stress -c 8 -t 100s