Prometheus relabel regex

[dzh...@contextlogic.com]

Hello all,

I was just wondering how I can exclude some metrics while relabelling metrics and performing hashmod on them. For example. I have a lot of histogram-related metrics which I do not want to relabel/add new label to, so I'm looking for a way to match all metrics **without** the strings "sum", "bucket", or "count" in their names. How can I do that?

Thanks.

[Ben Kochie]

Unfortunately, I think what you want is a "negative lookahead".  This is not supported by the re2 library Prometheus uses.

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[dzh...@contextlogic.com]

Hello Ben,

Thank you very much for your reply. Do you think the following will work?

metric_relabel_configs:

    - source_labels: ["__name__"]

      modulus: 25

      target_label: "__tmp_hash"

      action: "hashmod"

    # drop __tmp_hash label for histogram-related metrics

    - source_labels: ["__name__"]

      regex: ".*(sum|count|bucket)"

      target_label: "__tmp_hash"

      action: labeldrop

Thanks,

DZ

On Monday, July 10, 2017 at 1:58:12 PM UTC-7, Ben Kochie wrote:

Unfortunately, I think what you want is a "negative lookahead".  This is not supported by the re2 library Prometheus uses.

On Mon, Jul 10, 2017 at 10:25 PM, dzhang via Prometheus Users <promethe...@googlegroups.com> wrote:

Hello all,

I was just wondering how I can exclude some metrics while relabelling metrics and performing hashmod on them. For example. I have a lot of histogram-related metrics which I do not want to relabel/add new label to, so I'm looking for a way to match all metrics **without** the strings "sum", "bucket", or "count" in their names. How can I do that?

Thanks.

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[Brian Brazil]

On 10 July 2017 at 22:07, dzhang via Prometheus Users <promethe...@googlegroups.com> wrote:

Hello Ben,

Thank you very much for your reply. Do you think the following will work?

metric_relabel_configs:

    - source_labels: ["__name__"]

      modulus: 25

      target_label: "__tmp_hash"

      action: "hashmod"

    # drop __tmp_hash label for histogram-related metrics

    - source_labels: ["__name__"]

      regex: ".*(sum|count|bucket)"

      target_label: "__tmp_hash"

      action: labeldrop

You need a normal replace action rather than a labeldrop. The replacement for that should be the empty string, so that the label is removed.

Brian

 

Thanks,

DZ

On Monday, July 10, 2017 at 1:58:12 PM UTC-7, Ben Kochie wrote:

Unfortunately, I think what you want is a "negative lookahead".  This is not supported by the re2 library Prometheus uses.

On Mon, Jul 10, 2017 at 10:25 PM, dzhang via Prometheus Users <promethe...@googlegroups.com> wrote:

Hello all,

I was just wondering how I can exclude some metrics while relabelling metrics and performing hashmod on them. For example. I have a lot of histogram-related metrics which I do not want to relabel/add new label to, so I'm looking for a way to match all metrics **without** the strings "sum", "bucket", or "count" in their names. How can I do that?

Thanks.

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To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/36b88b1d-b82c-436e-82b0-8c77d396d696%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

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Brian Brazil

www.robustperception.io

[dzh...@contextlogic.com]

Thank you Brian. It worked.

To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/112441a3-399e-4e61-b836-c549a7b720be%40googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

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Brian Brazil

www.robustperception.io