PrometheusMetricsService

Service that exposes the "/metrics" and "/metricsandreset" routes for Prometheus to obtain performance metrics.

Extends: RestService

Description

The PrometheusMetricsService class allows you to create services that expose the "/metrics" and "/metricsandreset" routes for Prometheus to obtain performance metrics.

Configuration parameters

dependencies:

  • endpoint: override for HTTP Endpoint dependency
  • prometheus_counters: override for PrometheusCounters dependency

connection(s):

  • discovery_key: (optional) key to retrieve the connection from IDiscovery
  • protocol: connection protocol: http or https
  • host: host name or IP address
  • port: port number
  • uri: resource URI or connection string with all parameters in it

References

    • *:logger:*:*:1.0 - (optional) ILogger components to pass log messages
    • *:counters:*:*:1.0 - (optional) ICounters components to pass collected measurements
    • *:discovery:*:*:1.0 - (optional) IDiscovery services to resolve connections
    • *:endpoint:http:*:1.0 - (optional) HttpEndpoint reference to expose REST operations
    • *:counters:prometheus:*:1.0 - PrometheusCounters reference to retrieve collected metrics

Constructors

Creates a new instance of this service.

PrometheusMetricsService()

Instance methods

setReferences

Sets references to dependent components.

@override

void setReferences(IReferences references)

  • references: IReferences - references to locate the component dependencies.

register

Registers all service routes in a HTTP endpoint.

@override

void register()

Examples

var service = PrometheusMetricsService();
service.configure(ConfigParams.fromTuples([
    'connection.protocol', 'http',
    'connection.host', 'localhost',
    'connection.port', 8080
]));

await service.open('123')
print('The Prometheus metrics service is accessible at http://+:8080/metrics');

See also