Suggest add prefix setting for <scrape_config> in prometheus.yml

[keh...@gmail.com]

Hi,
Is it possible for Prometheus to support a [prefix:<string>] filed in <scrape_config>.
So that the names of the metrics collected from this scrape job will have a prefix. I got the idea from the netdata prometheus API, where you can set prefix=netdata_ in url params and then you got data looks like
netdata_aa_aa
netdata_aa_bb

I think this is very useful for in some cases, you don't know what you've collected from the job. And currently prometheu don't support query metrics names by labels. You may ofthen got very greedy metric name like "jvm_memory_...". Only when you query it then you can tell it may just be jvm info of a small application.

[Ben Kochie]

This can be done with metric_relabel_configs.

Add this to the job:

metric_relabel_configs:
  - source_labels: [__name__]

    target_label: __name__

    replacement: "prefix_${1}"

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[Brian Brazil]

On 14 August 2017 at 08:49, Ben Kochie <sup...@gmail.com> wrote:

This can be done with metric_relabel_configs.

This incidentally is not recommend, this is what labels are for. 

> You may ofthen got very greedy metric name like "jvm_memory_...". Only when you query it then you can tell it may just be jvm info of a small application.

You would have specified which application you're getting the metrics from with the job label here.

Brian

 

Add this to the job:

metric_relabel_configs:
  - source_labels: [__name__]

    target_label: __name__

    replacement: "prefix_${1}"

On Sun, Aug 13, 2017 at 10:32 PM, <keh...@gmail.com> wrote:

Hi,
Is it possible for Prometheus to support a [prefix:<string>] filed in <scrape_config>.
So that the names of the metrics collected from this scrape job will have a prefix. I got the idea from the netdata prometheus API, where you can set prefix=netdata_ in url params and then you got data looks like
netdata_aa_aa
netdata_aa_bb

I think this is very useful for in some cases, you don't know what you've collected from the job. And currently prometheu don't support query metrics names by labels. You may ofthen got very greedy metric name like "jvm_memory_...". Only when you query it then you can tell it may just be jvm info of a small application.

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Brian Brazil

www.robustperception.io