I want specific display of metrics in prometheus

[1Kyl0]

Hello,

I'm trying to have specific display of metrics retrieved by snmp_exporter in prometheus, but I can't find the right solution.
Let me explain, currently I have this display when I retrieve metrics :

name_of_metric {name_of_metric ="name_of_the_instance_linked_to_the_oid",instance_value="0.0"} 1

And below is the display i want :

name_of_metric {instance="name_of_the_instance_linked_to_the_oid"} instance_value

Here is my config of prometheus :

    static_configs:
      - targets:
        - ip_1
        - ip_2
    metrics_path: /snmp
    params:
      auth: [name_auth]
      module: [tridium]
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:9116

  - job_name: 'snmp_exporter'
    static_configs:
      - targets: ['localhost:9116']

And my config for snmp_exporter :

auths:
  dcim_snmp:
    community: secret_community
    security_level: noAuthNoPriv
    auth_protocol: MD5
    priv_protocol: DES
    version: 2
modules:
  snmp:
    walk:
      - private_oid

    metrics:
      - name: name_of_metric
        oid: oid_of_the_instance
        type: DisplayString
        indexes:
        - labelname: value
          type: gauge
        lookups:
        - labels:
          - value
          labelname: value
          oid: oid_of_instance_value
          type: DisplayString

Why do I want this display ?
Because the current display does not allow me to use the instance values, ​​as only the 1 outside the braces is taken into account.
So I can't have metrics that can be used for monitoring and alerting in prometheus.

I hope you can help me.
Thanks in advance.

[SuperQ]

This doesn't make a lot of sense. Can you include the real MIB and OID you're trying to use?

[SuperQ]

The index label is necessary to maintain uniqueness and provide the mapping between the two OIDs.

The instance label is a reserved name, you can not use it that way.

[1Kyl0]

Hello,

Oh okay no problem, for index it was in case that we could have hide it but that doesn't bother.

Ok I understand for instance, can I replace with name label or something similar and not used ?

However, it's not the main problem, I need to find out how to set the oid values 1.3.6.1.4.1.4131.1.6.2.2.1.3 so that they displays well outside braces.

[SuperQ]

I'm not sure what you mean by "display outside the braces". Prometheus only supports float64 values for metrics. The walked values of the 1.3.6.1.4.1.4131.1.6.2.2.1.3 metric like iso.3.6.1.4.1.4131.1.6.2.2.1.3.323 = STRING: "1" will be translated into a metric with the value of 1.

Like I explained, your metric is currently exposing a string OID, and the regex_extract is required to translate that into a numeric float value..

[SuperQ]

Maybe try this regex_extract:

        regex_extracts:
          '':
            - regex: (?:(\d+))
              value: '$1'
            - regex: ^(?:(\d+)\.(\d+))$
              value: '$1.$2'

[1Kyl0]

Yeah sorry, I misspoke, I wanted to say that currently it seems to be in the wrong format because I only see zeros.

I have the feeling that with gauge type, regex don't translate String: "1" into metrics with value of 1.
But I tried with DisplayString or counter instead of gauge and this is what it shows :

# HELP jace_bool  (regex extracted)
# TYPE jace_bool gauge
jace_bool{index="1",value="EL_Surete_1_TDSurete_PresUJDB"} 0.1
jace_bool{index="10",value="RE_Salle_1_Pompe_2_SD"} 0.1
jace_bool{index="100",value="TA_SalleEtChaine_1_Centrale_Arr"} 0

So String: "1" is transtlate into metrics with value of 0.1 and String: "0" into metrics with value of 0.
I can try with other oid who have others metrics to recovered and which are different than 0 or 1.

[1Kyl0]

It's good with this config for regex_extract and type DisplayString:

regex_extracts:
          '':
            - regex: (?:(\d+))
              value: '$1'
            - regex: ^(?:(\d+)\.(\d+))$
              value: '$1.$2'

Thank you for your great help