Datadog Agent Not Reporting Metrics or Host Missing

How to fix it

Try these in order — the most common fix is first.

1. 1. Run agent status

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   1. Run sudo datadog-agent status (or agent status in a container)
   2. Look at API Key Status and Forwarder sections for errors
   Did this fix it? Yes No

2. 2. Verify API key and site

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   1. Confirm the key in Organization Settings > API Keys
   2. Set site in datadog.yaml (e.g. datadoghq.eu) if not on US1
   Did this fix it? Yes No

3. 3. Test connectivity

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   1. curl the validate endpoint on your site: api.<site>/api/v1/validate with the key
   2. Allow outbound 443 or configure proxy settings in datadog.yaml
   Did this fix it? Yes No

4. 4. Set hostname explicitly

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   1. Set hostname in datadog.yaml or DD_HOSTNAME env var
   2. Restart the Agent
   Did this fix it? Yes No

5. 5. Check individual integrations

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   1. Run datadog-agent check <name>
   2. Fix the config in conf.d and restart
   Did this fix it? Yes No

Symptoms

Host missing from Infrastructure List, or no metrics from a running Agent.

Why it happens

• Invalid or wrong-site API key
• Outbound HTTPS blocked by firewall or proxy
• Hostname cannot be resolved (containers, CI)
• Individual check failing

This guide also covers

• datadog agent not reporting
• datadog host not showing in infrastructure list
• datadog agent not sending metrics

Other Datadog errors

• How to Cancel Datadog Subscription
• Datadog Duplicate Hosts After AWS Integration
• Datadog Logs Not Showing in Log Explorer
• Datadog APM Traces Not Showing Up
• Datadog Agent High CPU or Memory Usage
• Datadog Monitor No Data Alerts Not Working
• Why Is My Datadog Bill So High: Custom Metrics
• Datadog Agent 403 API Key Invalid in Kubernetes