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Document updated on Oct 24, 2022

OpenCensus Agent (Azure Monitor)

The ocagent exporter sends OpenCensus Stats and Traces to the OpenCensus Agent, instead of pushing data to backends’ exporters.

For instance, you can enable ocagent to upload data to the OpenCensus Agent, and from there, the agent is simply scraped by a Prometheus.

You can integrate the OpenCensus Agent with Azure Monitor, Jaeger, or Prometheus to name a few examples.

Enabling it only requires you to add the ocagent exporter in the opencensus module.

The following configuration snippet sends the data:

{
  "extra_config": {
    "telemetry/opencensus": {
      "sample_rate": 100,
      "reporting_period": 0,
      "exporters": {
       "ocagent": {
          "address": "collector",
          "service_name": "krakend",
          "reconnection": "2s",
           "insecure": false,
          "enable_compression": true,
          "headers": {
            "header1": "value1"
          }
        }
      }
    }
}

As with all OpenCensus exporters, you can add optional settings in the telemetry/opencensus level:

Fields of "telemetry/opencensus"
* required fields

enabled_layers
Lets you specify what data you want to export. All layers are enabled by default unless you declare this section.
backend boolean
Reports the activity between KrakenD and your services
Defaults to false
pipe boolean
Reports the activity at the beginning of the proxy layer. It gives a more detailed view of the internals of the pipe between end-users and KrakenD, having into account merging of different backends.
Defaults to false
router boolean
Reports the activity between end-users and KrakenD
Defaults to false
reporting_period integer
The number of seconds passing between reports. If duration is less than or equal to zero, it enables the default behavior of each exporter.
Defaults to 0
sample_rate integer
A number between 0 (no requests at all) and 100 (all requests) representing the percentage of sampled requests you want to send to the exporter. Sampling the 100% of the requests is generally discouraged when the relationship between traffic and dedicated resources is sparse.
Defaults to 0
Schema: https://www.krakend.io/schema/v2.3/telemetry/opencensus.json

Then, the exporters key must contain an ocagent entry with the following properties:

Fields of "telemetry/opencensus": { "exporters":{} }
* required fields

ocagent object
Exporting metrics, logs, and events to the OpenCensus Agent.
address * string
The address of your Azure Monitor collector.
Example: "localhost:55678"
enable_compression boolean
Whether to send data compressed or not.
Defaults to false
headers object
List of keys and values for the headers sent. Keys and values must be of type string.
Example: {"header1":"value1"}
insecure boolean
Whether the connection can be established in plain (insecure) or not.
Defaults to false
reconnection string
The reconnection time
Specify units using ns (nanoseconds), us or µs (microseconds), ms (milliseconds), s (seconds), m (minutes), or h (hours).
Defaults to "2s"
service_name * string
An identifier of your service, e.g, krakend.
Schema: https://www.krakend.io/schema/v2.3/telemetry/opencensus.json

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