* allow exposing meta information for registered metrics
New public method `ExposeMetadata` allows enabling exposition
of dummy meta-info for all exposed metrics across all Sets.
This feature is needed to improve compatibility
with 3rd-party scrapers that require meta information to be present.
This commit doesn't update exposition of default system/process
metrics to keep the list of changes small. This change should
be added in a follow-up commit.
https://github.com/VictoriaMetrics/metrics/issues/48
* cleanup
* wip
* wip
* wip
* wip
---------
Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
PushConfig represents a struct package uses for pushing
metrics to remote destination. Having a structure
helps to extend functionality in the future, without
touching the signature of existing functions.
For example, `PushConfig` supports custom HTTP headers
via `Headers` param.
Updates https://github.com/VictoriaMetrics/metrics/issues/52
Updates https://github.com/VictoriaMetrics/metrics/issues/36
Co-authored-by: hagen1778 <roman@victoriametrics.com>
