go_expvar.yaml Sample for Trivial Web App

go_expvar.yaml

init_config:

instances:
    # Most memstats metrics are exported by default
    # See http://godoc.org/runtime#MemStats for their explanation

    - expvar_url: http://localhost:8000/debug/vars
      tags:
        - "application_name:myapp"
        - "optionaltag2"
      metrics:
        # These metrics are just here as examples.
        # Most memstats metrics are collected by default without configuration needed.
        - path: memstats/PauseTotalNs
          alias: go_expvar.gc.pause_time_in_ns
          type: rate
          tags:
             - "metric_tag1:tag_value1"
             - "metric_tag2:tag_value2"
        - path: memstats/Alloc            # metric will be reported as a gauge by default
        - path: memstats/Lookups
          type: rate
        - path: memstats/Mallocs          # with no name specified, the metric name will default to a path based name
          type: rate
        - path: memstats/Frees
          type: rate
        - path: memstats/BySize/1/Mallocs # You can get nested values by separating them with "/"
        - path: myvariable
          alias: go_expvar.my_custom_name
          type: gauge
        - path: routes/get_.*/count       # You can use a regex when you want to report for all elements matching a certain pattern
        - path: hits_per_minute
          alias: go_expvar.hits_per_minute
          type: gauge