Support Basic Auth for Prometheus PushGateway reporter

[Guosmilesmile]

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• I searched in the issues and found nothing similar.

Motivation

Currently PrometheusPushGatewayReporter sends metrics to the Prometheus PushGateway anonymously. In production, PushGateway is often placed behind has its own basic auth enabled, which makes the reporter unusable in secured deployments.

• Add two new config options:
  • metrics.reporter.prometheus-push.username
  • metrics.reporter.prometheus-push.password

Solution

No response

Anything else?

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Willingness to contribute

• I'm willing to submit a PR!