Datadog | Kong Docs

Log metrics for a service or route to a local Datadog agent.

ce6fc59bed (Reworked plugin queues (#5088))

Metrics

The Datadog plugin currently logs the following metrics to the Datadog server about a service or route.

Metric	Description	Namespace
`request_count`	tracks the request	`kong.request.count`
`request_size`	tracks the request’s body size in bytes	`kong.request.size`
`response_size`	tracks the response’s body size in bytes	`kong.response.size`
`latency`	tracks the time interval between the request started and response received from the upstream server	`kong.latency`
`upstream_latency`	tracks the time it took for the final service to process the request	`kong.upstream_latency`
`kong_latency`	tracks the internal Kong latency that it took to run all the plugins	`kong.kong_latency`

The metrics will be sent with the tags name and status carrying the API name and HTTP status code respectively. If you specify consumer_identifier with the metric, a tag consumer will be added.

Metric fields

Plugin can be configured with any combination of Metrics, with each entry containing the following fields.

Field	Description	Datatypes	Allowed values
`name`	Datadog metric’s name	String	Metrics
`stat_type`	Determines what sort of event the metric represents	String	`gauge`, `timer`, `counter`, `histogram`, `meter`, `set`
`sample_rate` conditional	Sampling rate	Number	`number`
`consumer_identifier` conditional	Authenticated user detail	String	`consumer_id`, `custom_id`, `username`
`tags` optional	List of tags	Array of strings	`key[:value]`

Metric requirements

All metrics get logged by default.
Metrics with stat_type as counter or gauge must have sample_rate defined as well.

Migrating Datadog queries

The plugin updates replace the api, status, and consumer-specific metrics with a generic metric name. You must change your Datadog queries in dashboards and alerts to reflect the metrics updates.

For example, the following query:

avg:kong.sample_service.latency.avg{*}

would need to change to:

avg:kong.latency.avg{name:sample-service}

Kong process errors

This logging plugin logs HTTP request and response data, and also supports streams data (TCP, TLS, and UDP).

If you are looking for the Kong process error file (which is the nginx error file), you can find it at the following path:

{prefix}/logs/error.log

Next Datadog Configuration