Overview
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The Datadog Agent automatically adds certain tags to all logs it collects before sending them to Datadog. These tags are added pre-ingestion, and are included in the payload that gets delivered to Datadog.
Pre-ingestion processing
Since these tags are added pre-ingestion, they:
- Are included in all log data delivered to Datadog
- Increase the overall size of your log data
- Are available for filtering, searching, and aggregation in the Log Explorer
- Can be used in log-based metrics and queries
The following tags are automatically added to logs by the Datadog Agent:
| Tag | Description | Conditions |
|---|
source | The source of the log (file path, integration name, etc.) | Always when available |
service | The service name if configured in the log collection | Always when available |
env | The environment tag if configured globally | Always when available |
version | The Agent version | Always when available |
filename | Base name of the tailed file | File-based sources only |
dirname | Directory containing the tailed file | File-based sources only |
source_host | IP address of the socket source host | Socket sources (TCP/UDP) only |
event_type | Type of the Windows event | Windows events only |
event_source | Source of the Windows event | Windows events only |
event_id | Windows Event ID | Windows events only, if tag_event_id: true |
sid | Windows Security identifier | Windows events only, if tag_sid: true |
truncated | Source of truncation | If logs_config.tag_truncated_logs: true |
multiline | Source of multi-line aggregation | If logs_config.tag_multi_line_logs: true |
aggregated_json | Indicates that the log was aggregated from multiple JSON log entries | If logs_config.auto_multi_line.tag_aggregated_json: true |
Further reading
Additional helpful documentation, links, and articles:
