I don't think the exporter can do that, although it sounds like a good idea
to me (i.e. to be able to set a label rather than mangle the metric name).
Possibly you could use metric_relabel_configs to fix it up:
- source_labels: [__name__]
regex: '.*_CHANNEL_(.+)'
target_label: channel
- source_labels: [__name__]
regex: '(.*)_CHANNEL_.+'
target_label: __name__
Otherwise, a simple HTTP proxy which sits between prometheus and
snmp_exporter.
On Wednesday, 26 March 2025 at 08:44:49 UTC Elliott Balsley wrote:
> I have an SNMP device that returns a value like this:
>
> DOLBY-CP850-MIB::cp850MeterLevels.0 = STRING: "00 00 00 00 00 00 00 00 00
> 00"
>
> This string represents the volume level of 10 separate audio channels, so
> I would like to break it apart and record it as 10 metrics. I previously
> had this working in Telegraf so the result looked like this:
> snmp_dolby_cp_meter_level_dbfs{channel="L"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="R"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="C"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="LFE"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="Lss"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="Rss"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="Lrs"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="Rrs"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="Lts"} 0
> snmp_dolby_cp_meter_level_dbfs{channel="Rts"} 0
>
> Is this possible to do with snmp-exporter? I couldn't find any way to add
> the channel label. The best I could think of is this regex_extract in the
> exporter, but this isn't really what I want because it adds the channel
> identifier to the metric name.
>
> cp850MeterLevels:
> type: DisplayString
> regex_extracts:
> '_L':
> - regex: '(..) .. .. .. .. .. .. .. .. ..'
> value: $1
> '_R':
> - regex: '.. (..) .. .. .. .. .. .. .. ..'
> value: $1
> '_C':
> - regex: '.. .. (..) .. .. .. .. .. .. ..'
> value: $1
> '_LFE':
> - regex: '.. .. .. (..) .. .. .. .. .. ..'
> value: $1
> '_Lss':
> - regex: '.. .. .. .. (..) .. .. .. .. ..'
> value: $1
> '_Rss':
> - regex: '.. .. .. .. .. (..) .. .. .. ..'
> value: $1
> '_Lrs':
> - regex: '.. .. .. .. .. .. (..) .. .. ..'
> value: $1
> '_Rrs':
> - regex: '.. .. .. .. .. .. .. (..) .. ..'
> value: $1
> '_Lts':
> - regex: '.. .. .. .. .. .. .. .. (..) ..'
> value: $1
> '_Rts':
> - regex: '.. .. .. .. .. .. .. .. .. (..)'
> value: $1
>
>
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