The Datadog Agent is a lightweight software that runs on your hosts. It collects events and metrics from your hosts and sends them to Datadog, where you can analyze and visualize them. The Agent can collect system metrics, custom metrics, and logs, providing a comprehensive view of your infrastructure's performance.
One common issue users encounter is the Datadog Agent not collecting Linux metrics. This can manifest as missing data in your Datadog dashboards or alerts not triggering as expected. You might notice that metrics such as CPU usage, memory usage, or disk I/O are not being reported.
The root cause of this issue is often that Linux metrics collection is not enabled or is misconfigured. The Datadog Agent requires specific configurations to collect and report Linux metrics. If these configurations are not set correctly, the Agent will not be able to gather the necessary data.
The Agent's configuration files, typically located in /etc/datadog-agent/, need to be correctly set up to enable Linux metrics collection. Key files include datadog.yaml and any integration-specific configuration files.
To resolve the issue of the Datadog Agent not collecting Linux metrics, follow these steps:
datadog.yaml file located in /etc/datadog-agent/.collect_linux_metrics option is set to true. If this option is missing, add it under the system_probe_config section:system_probe_config:
enabled: true
collect_linux_metrics: true
After updating the configuration, restart the Datadog Agent to apply the changes:
sudo systemctl restart datadog-agent
Check the Datadog dashboard to ensure that Linux metrics are now being collected. You can also verify the Agent's status by running:
sudo datadog-agent status
This command will provide detailed information about the Agent's current state and any errors encountered.
For more detailed information on configuring the Datadog Agent for Linux metrics, refer to the official Datadog documentation. If you continue to experience issues, consider reaching out to Datadog Support for further assistance.
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