# Datadog imgproxy can send its metrics to Datadog. To use this feature, do the following: 1. Install & configure the Datadog Trace Agent (>= 5.21.1). 2. Set the `IMGPROXY_DATADOG_ENABLE` environment variable to `true`. 3. Configure the Datadog tracer using `ENV` variables provided by [the package](https://github.com/DataDog/dd-trace-go): * `DD_AGENT_HOST`: sets the address to connect to for sending metrics to the Datadog Agent. Default: `localhost` * `DD_TRACE_AGENT_PORT`: sets the Datadog Agent Trace port. Default: `8126` * `DD_DOGSTATSD_PORT`: set the DogStatsD port. Default: `8125` * `DD_SERVICE`: sets the desired application name. Default: `imgproxy` * `DD_ENV`: specifies the environment to which all traces will be submitted. Default: empty * `DD_TRACE_SOURCE_HOSTNAME`: specifies the hostname with which to mark outgoing traces. Default: empty * `DD_TRACE_REPORT_HOSTNAME`: when `true`, sets hostname to `os.Hostname()` with which to mark outgoing traces. Default: `false` * `DD_TAGS`: sets a key/value pair which will be set as a tag on all traces. Example: `DD_TAGS=datacenter:njc,key2:value2`. Default: empty * `DD_TRACE_ANALYTICS_ENABLED`: allows specifying whether Trace Search & Analytics should be enabled for integrations. Default: `false` * `DD_RUNTIME_METRICS_ENABLED`: enables automatic collection of runtime metrics every 10 seconds. Default: `false` * `DD_TRACE_STARTUP_LOGS`: causes various startup info to be written when the tracer starts. Default: `true` * `DD_TRACE_DEBUG`: enables detailed logs. Default: `false` imgproxy will send the following info to Datadog: * Response time * Image downloading time * Image processing time * Errors that occurred while downloading and processing image