[BUG] pktvisor flow_advanced handler returning incorrect openmetrics output.

[renatoalmeidaoliveira]

Pktvisor version

pktvisor 4.5.0

Platform

binary

Agent configuration

version: "1.0"
visor:
  config:
    verbose: true
  taps:
    my_flow_tap:
      input_type: flow
      config:
        port: 6343
        bind: 192.168.0.1
        flow_type: netflow
      tags:
        flow: true
  # optionally define policies
  policies:
    default:
      input:
        input_type: flow
        tap: my_flow_tap
      kind: collection
      handlers:
        modules:
          flow_advanced:
            config:
              summarize_ips_by_asn: true
              exclude_unknown_asns_from_summarization: true
              exclude_asns_from_summarization:
                - 65000
            type: flow
            metric_groups:
              enable:
                - counters
                - by_bytes
                - top_ports
                - top_ips
              disable:
                - all

Steps to reproduce

1. Send data to the server, the router MUST send flow data for multiple interfaces;
2. Collect data using http://127.0.0.1:10853/metrics/

Expected output

Only one entry TYPE for each metric, as https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md?plain=1#L527

Current Output

The api is returning one TYPE output for each interface, example metric:

# HELP flow_top_out_dst_ports_bytes Top out destination ports by bytes
# TYPE flow_top_out_dst_ports_bytes gauge