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stats: add name vectors to prometheus exporter output

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Type: improvement

Counters are labeled with interface indices in the Prometheus exporter
output. For example:

  # TYPE _if_drops counter
  _if_drops{thread="0",interface="0"} 0
  _if_drops{thread="0",interface="1"} 0
  _if_drops{thread="0",interface="2"} 2112
  [..]

Currently, it's unable to map interface indices to the interface names
using only output provided by the Prometheus exporter. However, this
mapping is present in the vpp_get_stats output:

  # vpp_get_stats dump /if/names
  [0]: local0 /if/names
  [1]: GigabitEthernet0/8/0 /if/names
  [2]: GigabitEthernet0/9/0 /if/names
  [..]

With this change, add name vectors to Prometheus exporter output as info
metrics. Thus exposing interfaces and their indices:

  # TYPE _if_names_info gauge
  _if_names_info{index="0",name="local0"} 1
  _if_names_info{index="1",name="GigabitEthernet0/8/0"} 1
  _if_names_info{index="2",name="GigabitEthernet0/9/0"} 1
  [..]

Signed-off-by: Alexander Chernavin <achernavin@netgate.com>
Change-Id: Iff86c4d6fea8805e71fb04fccf278bae855e88d1
This commit is contained in:
Alexander Chernavin
2021-09-17 12:37:48 +00:00
committed by Ole Tr�an
parent ca92091f95
commit 2430bad895
1 changed files with 9 additions and 0 deletions
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9
src/vpp/app/vpp_prometheus_export.c
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@ -112,6 +112,15 @@ retry:
res[i].scalar_value);
break;
case STAT_DIR_TYPE_NAME_VECTOR:
fformat (stream, "# TYPE %s_info gauge\n",
prom_string (res[i].name));
for (k = 0; k < vec_len (res[i].name_vector); k++)
if (res[i].name_vector[k])
fformat (stream, "%s_info{index=\"%d\",name=\"%s\"} 1\n",
prom_string (res[i].name), k, res[i].name_vector[k]);
break;
case STAT_DIR_TYPE_EMPTY:
break;