APM Server exposes an API endpoint that allows agents to query the server for configuration changes. More information on this feature is available in APM Agent configuration in Kibana.

Agent configuration endpointedit

The Agent configuration endpoint accepts both HTTP GET and HTTP POST requests. If an API keys or Secret token has been configured, it will also apply to this endpoint.

HTTP GETedit

service.name is a required query string parameter.

http(s)://{hostname}:{port}/config/v1/agents?service.name=SERVICE_NAME

HTTP POSTedit

Encode parameters as a JSON object in the body. service.name is a required parameter.

http(s)://{hostname}:{port}/config/v1/agents
{
  "service": {
      "name": "test-service",
      "environment": "all"
  },
  "CAPTURE_BODY": "off"
}

Responsesedit

Example requestedit

Example Agent configuration GET request including the service name "test-service":

curl -i http://127.0.0.1:8200/config/v1/agents?service.name=test-service

Example Agent configuration POST request including the service name "test-service":

curl -X POST http://127.0.0.1:8200/config/v1/agents \
  -H "Authorization: Bearer secret_token" \
  -H 'content-type: application/json' \
  -d '{"service": {"name": "test-service"}}'

Example responseedit

HTTP/1.1 200 OK
Cache-Control: max-age=30, must-revalidate
Content-Type: application/json
Etag: "7b23d63c448a863fa"
Date: Mon, 24 Feb 2020 20:53:07 GMT
Content-Length: 98

{
    "capture_body": "off",
    "transaction_max_spans": "500",
    "transaction_sample_rate": "0.3"
}