Ah yes, I hadn't thought of that. The default
<https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config>
for regex is "(.*)" not "(.+)" so it will match empty string. Glad it's
working for you now!
On Monday 14 October 2024 at 12:21:02 UTC+1 M shr wrote:
> yes you were right the problem was because not all metrics has the "col"
> label so those label didn't have any name and the whole scrape got lost
> with error missing metric name (__name__ label)
>
> it got fix now
> thanks
> On Monday, October 14, 2024 at 1:39:53 PM UTC+3:30 Brian Candler wrote:
>
>> Have a look at the "Status > Targets" menu of the prometheus web
>> interface. It may tell you of scraping errors. For example, I think it's
>> very likely with that renaming rule that you could end up with duplicate
>> metrics after the renaming, and that will cause scrapes to fail (and
>> therefore drop the metrics).
>>
>> e.g.
>>
>> metric_one{col="a"} 1
>> metric_two{col="a"} 2
>>
>> would become:
>>
>> a{col="a"} 1
>> a{col="a"} 2 << ERROR, duplicate metric
>>
>> Otherwise, Googling suggests that it works for other people, e.g.
>> https://alexandre-vazquez.com/prometheus-metrics-howto-change-name/.
>> You'll need to give more info to reproduce the problem:
>> 1. What version of prometheus are you using?
>> 2. Show examples of the raw metrics that you are trying to modify
>>
>> However, in any case I would strongly advise against having dynamic
>> metric names. The metric name is the type of thing being measured, and the
>> labels distinguish which instance of that thing. I think you should
>> therefore also describe *why* you want to change the metric names - there
>> is almost certainly a better way to achieve what you're trying to achieve.
>>
>> On Sunday 13 October 2024 at 14:34:00 UTC+1 M shr wrote:
>>
>>> i have the folling configuretion:
>>> - job_name: "sql_exporter"
>>> scrape_interval: 1m
>>> metrics_path: /metrics
>>> static_configs:
>>> - targets: ["127.0.0.1:9237"]
>>> labels:
>>> instance: "sql_exporter"
>>> metric_relabel_configs:
>>> - action: replace
>>> source_labels: [col]
>>> target_label: __name__
>>> replacement: "${1}"
>>> separator: ""
>>> i want to change the "col" label to metric name .
>>>
>>> it does not put "col" label as the name of the metric and it willl
>>> completely remove the metric. what is the issue here?
>>>
>>
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