Datadog CentOS Setup

Complete guide to installing, configuring, and managing Datadog Agent on CentOS systems.

Installation

1. Install Datadog Agent on CentOS

For Debian/Ubuntu:

DD_AGENT_MAJOR_VERSION=7 DD_API_KEY=your_api_key_here DD_SITE="datadoghq.com" \
  bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_agent.sh)"

For CentOS/RHEL, use YUM:

sudo yum install -y https://s3.amazonaws.com/dd-agent/scripts/install_agent.sh

2. Start Datadog Agent Service

sudo systemctl start datadog-agent

3. Enable Auto-start on Boot

sudo systemctl enable datadog-agent

Service Management

Check Agent Status

sudo systemctl status datadog-agent

Restart Agent

sudo systemctl restart datadog-agent

Stop Agent

sudo systemctl stop datadog-agent

Restart All Agent Services

sudo systemctl restart datadog-agent datadog-agent-trace datadog-agent-process

Configuration

Edit Datadog Agent Configuration

Using nano:

sudo nano /etc/datadog-agent/datadog.yaml

Using vim:

sudo vim /etc/datadog-agent/datadog.yaml

Vim Quick Edit Commands for Basic Configuration

# Open config file and jump to specific sections
sudo vim +/api_key /etc/datadog-agent/datadog.yaml          # Jump to API key line
sudo vim +/site /etc/datadog-agent/datadog.yaml             # Jump to site configuration
sudo vim +/hostname /etc/datadog-agent/datadog.yaml         # Jump to hostname setting
sudo vim +/logs_enabled /etc/datadog-agent/datadog.yaml     # Jump to logs setting

Essential vim commands for configuration editing:

# Search and replace patterns
:%s/# api_key:/api_key: your_api_key_here/g                 # Uncomment and set API key
:%s/# site:.*/site: datadoghq.com/g                         # Uncomment and set site
:%s/# logs_enabled: false/logs_enabled: true/g              # Enable logs collection
:%s/# hostname:.*/hostname: $(hostname)/g                   # Set current hostname

# Quick edits in vim
/api_key          # Search for api_key
n                 # Next occurrence
i                 # Insert mode
<ESC>             # Exit insert mode
:wq               # Write and quit
:q!               # Quit without saving

One-liner vim edits:

# Enable logs collection
sudo vim -c '%s/# logs_enabled: false/logs_enabled: true/g' -c 'wq' /etc/datadog-agent/datadog.yaml

# Set API key (replace YOUR_KEY with actual key)
sudo vim -c '%s/# api_key:.*/api_key: YOUR_KEY/g' -c 'wq' /etc/datadog-agent/datadog.yaml

# Set site to US
sudo vim -c '%s/# site:.*/site: datadoghq.com/g' -c 'wq' /etc/datadog-agent/datadog.yaml

# Set hostname to current system hostname
sudo vim -c '%s/# hostname:.*/hostname: '$(hostname)'/g' -c 'wq' /etc/datadog-agent/datadog.yaml

Advanced vim configuration editing:

# Multiple replacements in one command
sudo vim -c '%s/# api_key:.*/api_key: YOUR_KEY/g | %s/# site:.*/site: datadoghq.com/g | %s/# logs_enabled: false/logs_enabled: true/g' -c 'wq' /etc/datadog-agent/datadog.yaml

# Add tags section (append after line containing 'hostname:')
sudo vim -c '/hostname:/a\
\
# Tags\
tags:\
  - env:production\
  - service:myapp\
  - team:devops' -c 'wq' /etc/datadog-agent/datadog.yaml

# Backup and edit
sudo cp /etc/datadog-agent/datadog.yaml /etc/datadog-agent/datadog.yaml.backup
sudo vim /etc/datadog-agent/datadog.yaml

Basic Configuration

# API Key
api_key: your_api_key_here

# Datadog Site
site: datadoghq.com

# Hostname
hostname: your-server-name

# Tags
tags:
  - env:production
  - service:myapp
  - team:devops

# Log collection
logs_enabled: true

# APM (Application Performance Monitoring)
apm_config:
  enabled: true
  apm_dd_url: https://trace.datadoghq.com
  env: production
  receiver_port: 8126
  max_traces_per_second: 10
  analyzed_rate_by_service:
    my-app|env:staging: 1.0
    my-app|env:production: 0.5

Advanced APM Configuration

Complete APM Configuration Example

# APM Configuration Section in /etc/datadog-agent/datadog.yaml
apm_config:
  # Enable APM
  enabled: true
  
  # Datadog APM endpoint (US site)
  apm_dd_url: https://trace.datadoghq.com
  
  # For EU site, use:
  # apm_dd_url: https://trace.datadoghq.eu
  
  # Environment tag for all traces
  env: production
  
  # Port for trace collection (default: 8126)
  receiver_port: 8126
  
  # Maximum traces per second
  max_traces_per_second: 10
  
  # Connection timeout
  receiver_timeout: 5
  
  # Additional local hostname
  apm_non_local_traffic: false
  
  # Enable/disable detailed debug logging
  log_level: info
  
  # Analyzed spans rate by service
  analyzed_rate_by_service:
    my-web-app|env:production: 1.0
    my-api|env:production: 0.5
    my-background-service|env:production: 0.1
  
  # Filter configuration
  filter_tags:
    require:
      - "env:production"
    reject:
      - "http.status_code:404"
  
  # Replace rules for sensitive data
  replace_tags:
    - name: "password"
      pattern: "password=.*"
      repl: "password=***"
    - name: "credit_card"
      pattern: "\\d{4}-\\d{4}-\\d{4}-\\d{4}"
      repl: "****-****-****-****"
  
  # Ignore resources (URLs, etc.)
  ignore_resources:
    - "GET /health"
    - "GET /ping"
    - "OPTIONS .*"

APM Configuration Commands

# Enable APM in datadog.yaml
sudo vim -c '/apm_config:/,/enabled:/s/enabled: false/enabled: true/' -c 'wq' /etc/datadog-agent/datadog.yaml

# Set APM environment
sudo vim -c '/apm_config:/a\  env: production' -c 'wq' /etc/datadog-agent/datadog.yaml

# Set custom APM port
sudo vim -c '/apm_config:/a\  receiver_port: 8126' -c 'wq' /etc/datadog-agent/datadog.yaml

# Enable non-local traffic (for containerized apps)
sudo vim -c '/apm_config:/a\  apm_non_local_traffic: true' -c 'wq' /etc/datadog-agent/datadog.yaml

APM Environment-Specific Configurations

Development Environment:

apm_config:
  enabled: true
  apm_dd_url: https://trace.datadoghq.com
  env: development
  receiver_port: 8126
  max_traces_per_second: 50
  log_level: debug
  analyzed_rate_by_service:
    "*|env:development": 1.0

Staging Environment:

apm_config:
  enabled: true
  apm_dd_url: https://trace.datadoghq.com
  env: staging
  receiver_port: 8126
  max_traces_per_second: 20
  analyzed_rate_by_service:
    "*|env:staging": 0.8
  ignore_resources:
    - "GET /health"
    - "GET /metrics"

Production Environment:

apm_config:
  enabled: true
  apm_dd_url: https://trace.datadoghq.com
  env: production
  receiver_port: 8126
  max_traces_per_second: 10
  analyzed_rate_by_service:
    "critical-service|env:production": 1.0
    "web-app|env:production": 0.3
    "background-jobs|env:production": 0.1
  filter_tags:
    require:
      - "env:production"
  replace_tags:
    - name: "password"
      pattern: "password=.*"
      repl: "password=***"
  ignore_resources:
    - "GET /health"
    - "GET /ping"
    - "GET /favicon.ico"
    - "OPTIONS .*"

APM Service-Specific Configuration

Web Application APM:

# For web apps with high traffic
apm_config:
  enabled: true
  env: production
  receiver_port: 8126
  max_traces_per_second: 100
  analyzed_rate_by_service:
    "webapp|env:production": 0.1
  ignore_resources:
    - "GET /static/.*"
    - "GET /assets/.*"
    - "GET /favicon.ico"
  replace_tags:
    - name: "user_id"
      pattern: "user_id=\\d+"
      repl: "user_id=***"

API Service APM:

# For API services
apm_config:
  enabled: true
  env: production
  receiver_port: 8126
  max_traces_per_second: 50
  analyzed_rate_by_service:
    "api|env:production": 0.5
  filter_tags:
    require:
      - "service:api"
  ignore_resources:
    - "GET /v1/health"
    - "GET /v1/status"

Microservices APM:

# For microservices architecture
apm_config:
  enabled: true
  env: production
  receiver_port: 8126
  apm_non_local_traffic: true
  max_traces_per_second: 30
  analyzed_rate_by_service:
    "user-service|env:production": 1.0
    "payment-service|env:production": 1.0
    "notification-service|env:production": 0.2
    "logging-service|env:production": 0.05

APM Vim Configuration Commands

# Complete APM setup with vim
sudo vim -c '
/apm_config:/,/enabled:/c
apm_config:
  enabled: true
  apm_dd_url: https://trace.datadoghq.com
  env: production
  receiver_port: 8126
  max_traces_per_second: 10
  analyzed_rate_by_service:
    "my-app|env:production": 0.5
' -c 'wq' /etc/datadog-agent/datadog.yaml

# Add APM environment tag
sudo vim -c '/apm_config:/,/enabled: true/a\  env: production' -c 'wq' /etc/datadog-agent/datadog.yaml

# Enable APM for containerized applications
sudo vim -c '/apm_config:/,/enabled: true/a\  apm_non_local_traffic: true' -c 'wq' /etc/datadog-agent/datadog.yaml

# Add analyzed rate configuration
sudo vim -c '/apm_config:/,/enabled: true/a\
  analyzed_rate_by_service:\
    "*|env:production": 0.1' -c 'wq' /etc/datadog-agent/datadog.yaml

APM Testing and Validation

# Check if APM is enabled
sudo grep -A 10 "apm_config:" /etc/datadog-agent/datadog.yaml

# Test APM endpoint connectivity
curl -v telnet://localhost:8126

# Check APM status in agent status
sudo datadog-agent status | grep -A 20 "APM Agent"

# Verify APM traces are being received
sudo tail -f /var/log/datadog/trace-agent.log

# Send test trace (requires trace library)
curl -X POST http://localhost:8126/v0.4/traces \
  -H "Content-Type: application/msgpack" \
  -d '[]'

Quick APM Health Check Commands

# Check APM status
sudo datadog-agent status | grep -A 20 "APM Agent"

# Test APM connectivity
curl -v telnet://localhost:8126

# Monitor APM logs
sudo tail -f /var/log/datadog/trace-agent.log

APM One-Liner Diagnostics

# Complete APM status check
sudo datadog-agent status | grep -A 10 "APM Agent"
sudo grep -A 5 "apm_config:" /etc/datadog-agent/datadog.yaml
netstat -tlnp | grep 8126

# APM connectivity and log check
telnet localhost 8126
sudo tail -10 /var/log/datadog/trace-agent.log

# APM troubleshooting one-liner
sudo datadog-agent status | grep -i apm
netstat -an | grep 8126
ps aux | grep trace-agent

Enable Logs Collection

sudo sed -i 's/# logs_enabled: false/logs_enabled: true/' /etc/datadog-agent/datadog.yaml
sudo systemctl restart datadog-agent

Enable Process Agent

sudo sed -i 's/# enabled: false/enabled: true/' /etc/datadog-agent/conf.d/process.d/conf.yaml
sudo systemctl restart datadog-agent

Set Datadog Site

sudo sed -i 's/# site:.*/site: datadoghq.com/' /etc/datadog-agent/datadog.yaml

View Logs

View Agent Logs in Real-Time

sudo tail -f /var/log/datadog/agent.log

View Last 50 Lines

sudo tail -50 /var/log/datadog/agent.log

Search for Errors

sudo grep -i error /var/log/datadog/agent.log

View Recent Agent Logs with Errors

sudo tail -50 /var/log/datadog/agent.log | grep -i error

Powerful Grep Commands for Log Analysis

Search Multiple Error Types

# Search for errors, warnings, and failures
sudo grep -iE "(error|warning|fail|exception|critical)" /var/log/datadog/agent.log

# Color-coded output for better visibility
sudo grep -iE --color=always "(error|warning|fail|exception|critical)" /var/log/datadog/agent.log

Advanced Pattern Matching

# Search with context (3 lines before and after)
sudo grep -iA3 -B3 "error" /var/log/datadog/agent.log

# Search for connection issues
sudo grep -iE "(connection|timeout|refused|unreachable)" /var/log/datadog/agent.log

# Find API key related issues
sudo grep -iE "(api.*key|authentication|unauthorized|403|401)" /var/log/datadog/agent.log

Time-Based Log Analysis

# Search for errors in the last hour (assuming timestamp format)
sudo grep -E "$(date '+%Y-%m-%d %H')" /var/log/datadog/agent.log | grep -i error

# Search for today's errors
sudo grep -E "$(date '+%Y-%m-%d')" /var/log/datadog/agent.log | grep -i error

# Search for specific time pattern (e.g., last 30 minutes)
sudo awk '/2024-.*T[0-9]{2}:[3-6][0-9]:[0-9]{2}/ {print}' /var/log/datadog/agent.log | grep -i error

Integration-Specific Searches

# Search for specific integration issues
sudo grep -iE "(nginx|mysql|redis|postgres|apache)" /var/log/datadog/agent.log | grep -i error

# Find failed checks
sudo grep -iE "check.*failed|check.*error" /var/log/datadog/agent.log

# Search for configuration issues
sudo grep -iE "(config|configuration|yaml|parse)" /var/log/datadog/agent.log

Network and Connectivity Issues

# Find network-related problems
sudo grep -iE "(dns|network|socket|connection|proxy|firewall)" /var/log/datadog/agent.log

# Search for SSL/TLS issues
sudo grep -iE "(ssl|tls|certificate|handshake)" /var/log/datadog/agent.log

# Find timeout issues with context
sudo grep -iA5 -B5 "timeout" /var/log/datadog/agent.log

Performance and Resource Issues

# Find memory or CPU related issues
sudo grep -iE "(memory|cpu|resource|limit|usage)" /var/log/datadog/agent.log

# Search for slow operations
sudo grep -iE "(slow|performance|lag|delay)" /var/log/datadog/agent.log

# Find disk space issues
sudo grep -iE "(disk|space|full|no.*space)" /var/log/datadog/agent.log

Multi-File Log Analysis

# Search across all Datadog log files
sudo grep -r -i "error" /var/log/datadog/

# Search with file names shown
sudo grep -r -H -i "connection" /var/log/datadog/

# Search multiple system logs for Datadog references
sudo grep -h -i "datadog" /var/log/messages /var/log/syslog /var/log/daemon.log 2>/dev/null

Advanced Filtering and Counting

# Count occurrences of errors by type
sudo grep -io -E "(error|warning|critical)" /var/log/datadog/agent.log | sort | uniq -c | sort -nr

# Find unique error messages (remove timestamps)
sudo grep -i error /var/log/datadog/agent.log | sed 's/^[0-9-]* [0-9:.]*//' | sort | uniq

# Get error statistics for the last 100 lines
sudo tail -100 /var/log/datadog/agent.log | grep -c -i error

Real-Time Monitoring

# Monitor logs in real-time for errors
sudo tail -f /var/log/datadog/agent.log | grep -i --color=always error

# Monitor multiple patterns simultaneously
sudo tail -f /var/log/datadog/agent.log | grep -iE --color=always "(error|warning|fail|timeout)"

# Monitor with timestamps
sudo tail -f /var/log/datadog/agent.log | grep -iE --color=always "$(date '+%Y-%m-%d').*(error|warning)"

Complex Search Patterns

# Find lines that contain both "check" AND "failed"
sudo grep -i "check" /var/log/datadog/agent.log | grep -i "failed"

# Find errors but exclude certain patterns
sudo grep -i error /var/log/datadog/agent.log | grep -v -E "(test|debug|info)"

# Search for errors in specific integrations
sudo grep -E "nginx.*error|mysql.*error|redis.*error" /var/log/datadog/agent.log

Log Rotation Aware Searches

# Search current and rotated logs
sudo zgrep -h -i "error" /var/log/datadog/agent.log* | tail -50

# Search across all rotated files for specific patterns
for log in /var/log/datadog/agent.log*; do
  if [[ $log == *.gz ]]; then
    zgrep -i "connection.*failed" "$log"
  else
    grep -i "connection.*failed" "$log"
  fi
done

Export and Report Generation

# Create error summary report
sudo grep -c -i error /var/log/datadog/agent.log > datadog_error_report.txt
sudo grep -io -E "(error|warning|critical|fatal)" /var/log/datadog/agent.log | sort | uniq -c | sort -nr >> datadog_error_report.txt
sudo grep -i error /var/log/datadog/agent.log | tail -20 >> datadog_error_report.txt

One-Liner Diagnostic Commands

# Quick health check with grep
sudo grep -iE "(error|warning|fail)" /var/log/datadog/agent.log | tail -10
sudo systemctl is-active datadog-agent

# Find and count recent issues
sudo tail -100 /var/log/datadog/agent.log | grep -iE "(error|warning|fail)" | wc -l

# Complete diagnostic grep chain
sudo tail -200 /var/log/datadog/agent.log | grep -iE "(error|warning|fail|timeout|connection)" | head -10
sudo tail -200 /var/log/datadog/agent.log | grep -iE "(error|warning|fail)" | wc -l

Agent Diagnostics

Check Agent Version

sudo datadog-agent version

Agent Status

sudo datadog-agent status

Check Running Integrations

sudo datadog-agent check --list

List Failed Checks

sudo datadog-agent check --list-failed

Run Specific Check

sudo datadog-agent check system

Validate Configuration

sudo datadog-agent configcheck

Check Specific Integration Status

sudo datadog-agent check nginx

List Installed Integrations

sudo datadog-agent integration list

Check Agent Permissions

ls -la /etc/datadog-agent/
sudo usermod -a -G adm dd-agent

Testing and Validation

Test API Connectivity

curl -s -X GET "https://api.datadoghq.com/api/v1/validate" \
  -H "DD-API-KEY: your_api_key_here" | head -20

Check Agent Connectivity

sudo datadog-agent diagnose

Simple Connectivity Check

nc -zv api.datadoghq.com 443

Verify Configuration File

sudo cat /etc/datadog-agent/datadog.yaml | grep -E "^(api_key|site|logs_enabled)"

Integration Configuration

1. Nginx Integration

sudo tee /etc/datadog-agent/conf.d/nginx.d/conf.yaml > /dev/null << EOF
init_config:

instances:
  - nginx_status_url: http://localhost:8080/nginx_status

tags:
  - env:production
  - service:myapp
EOF

2. MySQL Integration

sudo tee /etc/datadog-agent/conf.d/mysql.d/conf.yaml > /dev/null << EOF
init_config:

instances:
  - server: localhost
    user: datadog
    password: your_password
    port: 3306

logs:
  - type: file
    path: /var/log/mysql/error.log
    source: mysql
    service: mysql
EOF

3. System Logs Configuration

sudo tee /etc/datadog-agent/conf.d/system.d/conf.yaml > /dev/null << EOF
logs:
  - type: file
    path: /var/log/syslog
    service: system
    source: linux

  - type: file
    path: /var/log/nginx/access.log
    service: nginx
    source: nginx

  - type: file
    path: /var/log/mysql/error.log
    service: mysql
    source: mysql
EOF

Restart Agent to Apply Changes

sudo systemctl restart datadog-agent

Troubleshooting

Agent Not Starting

Check for syntax errors:

sudo datadog-agent configcheck

View recent errors:

sudo journalctl -u datadog-agent -n 50

No Metrics Being Sent

Verify API key:

sudo grep "api_key" /etc/datadog-agent/datadog.yaml

Check connectivity:

curl -s -I https://api.datadoghq.com

Restart agent:

sudo systemctl restart datadog-agent

High CPU/Memory Usage

Check agent process:

ps aux | grep datadog-agent

View resource usage:

top -p $(pgrep -f datadog-agent)

Disable unnecessary integrations:

sudo nano /etc/datadog-agent/conf.d/

Enable Debug Mode

Create debug config:

sudo tee /etc/datadog-agent/datadog.yaml > /dev/null << EOF
debug: true
log_level: debug
EOF

Restart with debug enabled:

sudo systemctl restart datadog-agent

View debug logs:

sudo tail -f /var/log/datadog/agent.log

Uninstall

Remove Datadog Agent

Stop the agent:

sudo systemctl stop datadog-agent

Disable auto-start:

sudo systemctl disable datadog-agent

Remove the package:

sudo yum remove datadog-agent

Clean Up Configuration Files

Remove config directory:

sudo rm -rf /etc/datadog-agent

Remove logs:

sudo rm -rf /var/log/datadog

Environment Variables

Set API Key

export DD_API_KEY="your_api_key_here"

Set Site (US or EU)

export DD_SITE="datadoghq.com"  # or datadoghq.eu

Set Hostname

export DATADOG_HOSTNAME="my-server"

Set Environment Tag

export DD_ENV="production"

Set Service Name

export DD_SERVICE="myapp"

Set Version

export DD_VERSION="1.0.0"

Quick Reference Table

Task	Command
Install Agent	`DD_AGENT_MAJOR_VERSION=7 DD_API_KEY=key DD_SITE="datadoghq.com" bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_agent.sh)"`
Start Agent	`sudo systemctl start datadog-agent`
Check Status	`sudo systemctl status datadog-agent`
View Logs	`sudo tail -f /var/log/datadog/agent.log`
Agent Status	`sudo datadog-agent status`
Check Version	`sudo datadog-agent version`
Edit Config	`sudo nano /etc/datadog-agent/datadog.yaml`
Restart Agent	`sudo systemctl restart datadog-agent`
Enable Auto-start	`sudo systemctl enable datadog-agent`
Stop Agent	`sudo systemctl stop datadog-agent`
Test Connectivity	`curl -s https://api.datadoghq.com/api/v1/validate -H "DD-API-KEY: key"`
Uninstall	`sudo yum remove datadog-agent`

One-Liner Commands

Install, Configure, and Start Agent

DD_AGENT_MAJOR_VERSION=7 DD_API_KEY=your_api_key_here DD_SITE="datadoghq.com" \
  bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_agent.sh)"
sudo systemctl start datadog-agent
sudo systemctl enable datadog-agent

Quick Status Check

sudo datadog-agent status

Full Diagnostics Report

sudo systemctl status datadog-agent
sudo datadog-agent version
sudo datadog-agent check --list-failed
sudo tail -20 /var/log/datadog/agent.log

View Agent + System Info

sudo datadog-agent version
hostnamectl
systemctl is-active datadog-agent
nc -zv api.datadoghq.com 443

Configuration Files Reference

Main Configuration File

/etc/datadog-agent/datadog.yaml - Main agent configuration

Integration Configs

/etc/datadog-agent/conf.d/ - Directory for integration configs
/etc/datadog-agent/conf.d/nginx.d/conf.yaml - Nginx integration
/etc/datadog-agent/conf.d/mysql.d/conf.yaml - MySQL integration
/etc/datadog-agent/conf.d/system.d/conf.yaml - System metrics

Log Files

/var/log/datadog/agent.log - Main agent log
/var/log/datadog/ - All agent logs directory

One-Line Bash Commands - Essential Linux one-liners
Service Check Commands - systemctl management
Datadog Proxy Testing - Network proxy diagnostics

Installation​

1. Install Datadog Agent on CentOS​

2. Start Datadog Agent Service​

3. Enable Auto-start on Boot​

Service Management​

Check Agent Status​

Restart Agent​

Stop Agent​

Restart All Agent Services​

Configuration​

Edit Datadog Agent Configuration​

Vim Quick Edit Commands for Basic Configuration​

Basic Configuration​

Advanced APM Configuration​

Complete APM Configuration Example​

APM Configuration Commands​

APM Environment-Specific Configurations​

APM Service-Specific Configuration​

APM Vim Configuration Commands​

APM Testing and Validation​

Quick APM Health Check Commands​

APM One-Liner Diagnostics​

Enable Logs Collection​

Enable Process Agent​

Set Datadog Site​

View Logs​

View Agent Logs in Real-Time​

View Last 50 Lines​

Search for Errors​

View Recent Agent Logs with Errors​

Powerful Grep Commands for Log Analysis​

Search Multiple Error Types​

Advanced Pattern Matching​

Time-Based Log Analysis​

Integration-Specific Searches​

Network and Connectivity Issues​

Performance and Resource Issues​

Multi-File Log Analysis​

Advanced Filtering and Counting​

Real-Time Monitoring​

Complex Search Patterns​

Log Rotation Aware Searches​

Export and Report Generation​

One-Liner Diagnostic Commands​

Agent Diagnostics​

Check Agent Version​

Agent Status​

Check Running Integrations​

List Failed Checks​

Run Specific Check​

Validate Configuration​

Check Specific Integration Status​

List Installed Integrations​

Check Agent Permissions​

Testing and Validation​

Test API Connectivity​

Check Agent Connectivity​

Simple Connectivity Check​

Verify Configuration File​

Integration Configuration​

1. Nginx Integration​

2. MySQL Integration​

3. System Logs Configuration​

Restart Agent to Apply Changes​

Troubleshooting​

Agent Not Starting​

No Metrics Being Sent​

High CPU/Memory Usage​

Enable Debug Mode​

Uninstall​

Remove Datadog Agent​

Clean Up Configuration Files​

Environment Variables​

Set API Key​

Set Site (US or EU)​

Set Hostname​

Set Environment Tag​

Set Service Name​

Set Version​

Quick Reference Table​