PrometheusMetricsService

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

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.

public constructor()

Instance methods

setReferences

Sets references to dependent components.

public setReferences(references: IReferences): void

references: IReferences - references to locate the component dependencies.

register

Registers all service routes in a HTTP endpoint.

public register(): void

Examples

let service = new PrometheusMetricsService();
service.configure(ConfigParams.fromTuples(
    "connection.protocol", "http",
    "connection.host", "localhost",
    "connection.port", 8080
));

await service.open("123");
console.log("The Prometheus metrics service is accessible at http://+:8080/metrics");