Compatibility metric type summary

[maokitty]

Component(s)

processor/cumulativetodelta

Is your feature request related to a problem? Please describe.

As there is a summary in prometheus and opentelemetry-summary-legacy, convert it to delta for compatibility.

Describe the solution you'd like

Convert sum and count to delta and leave quantiles unchanged as quantile are time window based values.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• processor/cumulativetodelta: @TylerHelmuth

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[mx-psi]

@maokitty A summary does not have an aggregation temporality field https://github.com/open-telemetry/opentelemetry-proto/blob/ea449ae0e9b282f96ec12a09e796dbb3d390ed4f/opentelemetry/proto/metrics/v1/metrics.proto#L245-L247 as opposed to all other metric types handled by the cumulative to delta processor.

I think a solution here would be for something like the transform processor to allow you to split a summary into its constituent parts (count, sum, quantiles as separate metrics) and then apply cumulative-to-delta to them.

[github-actions]

Pinging code owners for processor/transform: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[TylerHelmuth]

There already are some summary conversion functions:

• https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/transformprocessor#convert_summary_count_val_to_sum
• https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/transformprocessor#convert_summary_sum_val_to_sum

Are these helpful?

[mx-psi]

I think they should be, maybe a quantiles one would be helpful as well but IMO we should wait until someone explicitly asks for it

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• processor/transform: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley
• processor/cumulativetodelta: @TylerHelmuth

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been closed as inactive because it has been stale for 120 days with no activity.