c2d debug

collector.yaml

receivers:
  prometheus:
    config:
      global:
        scrape_interval: 5s
      scrape_configs:
        - job_name: foo
          static_configs:
            - targets: ['0.0.0.0:8080']
    use_start_time_metric: true
    # use_start_time_metric: false
processors:
  filter:
    metrics:
      metric:
        - 'name != "foobar"'

  transform:
    metric_statements:
      - context: metric
        statements:
          - 'set(name, "fizzbuzz")'

  cumulativetodelta:
    initial_value: auto

exporters:
  logging:
    verbosity: detailed

connectors:
  forward:

service:
  pipelines:
    metrics/1:
      receivers:
        - prometheus
      processors:
        - filter
      exporters:
        - logging
        - forward
        
    metrics/2:
      receivers:
        - forward
      processors:
        - transform
        - cumulativetodelta
      exporters:
        - logging

main.go

package main

import (
	"net/http"
	"time"

	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promauto"
	"github.com/prometheus/client_golang/prometheus/promhttp"
)

func main() {
	ctr := promauto.NewCounter(prometheus.CounterOpts{
		Name: "foobar",
	})
	go func() {
		for range time.NewTicker(time.Second).C {
			ctr.Add(1)
		}
	}()
	http.ListenAndServe(":8080", promhttp.Handler())
}