OTel/Prometheus Interoperability Survey

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The purpose of this survey is to:

Determine user sentiment around Prometheus Metric naming
Determine if there is a difference of opinions between user groups

Prometheus "experts" vs OTel "experts"
Developers (writing instrumentation) vs Operators (running agents, writing queries/alerts)
OSS Users (Collector, Prom Server, Thanos) vs users of Managed Services.

Learn overall sentiment about the compatibility of the two projects

This survey will be open from May 1st to May 31st.

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How large is your organization? *

0-50

50-100

100-1,000

>1,000

What industry do you work in? *

Technology

Manufacturing

Aerospace

Retail

Financial

Medical

Altres:

What type of team do to work on? *

Dev

DevOps

Operations

SRE

Platform engineering

Observability

Altres:

How well do you understand Prometheus?
*

Not at all familiar

Somewhat familiar

Expert

Libraries

Formats

Server configuration

PromQL

How familiar are you with OpenTelemetry?
*

Not at all familiar

Somewhat familiar

Expert

Libraries

OTLP

Collector

Operator

Which of the following instrumentation libraries or tools are you using (select all that apply): *

Prometheus Client Libraries

Prometheus exporters (e.g. node_exporter)

OpenTelemetry Metric Client Libraries

OpenTelemetry Trace Client Libraries

OpenTelemetry auto-instrumentation agents

Altres:

Obligatori

Which of the following OpenTelemetry components are you using to deliver metrics to your backend (select all that apply):
*

OpenTelemetry Language SDK Prometheus exporters

OpenTelemetry Language SDK Prometheus bridges

OpenTelemetry Collector Prometheus receiver

OpenTelemetry Collector Simple Prometheus receiver

OpenTelemetry Collector Prometheus exporter

OpenTelemetry Collector Prometheus remote write exporter

Prometheus Client OTLP export.

Prometheus Server OTLP ingestion

None of the Above

Obligatori

Which of the following are you using to store metrics (select all that apply):

The Prometheus Server

An open-source prometheus backend (Thanos, Cortex, Grafana Mimir, etc.)

A Prometheus-compatible (or PromQL compatible) solution from a vendor

A backend not associated with Prometheus, not compatible with PromQL

Which query language are you using to query metrics (select all that apply):
*

PromQL

SQL

A vendor-specific query language (specify what under Other)

A different open source query language (specify what under Other)

Altres:

Obligatori

Which of these have you done in the past 6 months (select all that apply):
*

Added a metric to an application

Configured collection or routing of metrics

Written a live (ad-hoc) query over metrics

Created or edited a dashboard for displaying metrics

Created or edited an alert

Created or edited a recording rule

Obligatori

How easy have you found it to use OpenTelemetry with Prometheus?
*

Very easy

Very hard

How confusing have you found the translation between OpenTelemetry metrics and Prometheus metrics?
*

Very easy

Very hard

What have been the biggest challenges you’ve faced using OpenTelemetry with Prometheus?
*

What would you like to see changed or improved with OpenTelemetry’s Prometheus support?
*

OpenTelemetry defines the HTTP server histogram metric as http.server.request.duration, with a unit of seconds (s). Suppose you are writing a query for the 95th percentile of the same HTTP metric. Which of the following would you expect to write (regardless of what is valid/correct today), (select all that apply):
*

histogram_quantile(0.95, rate({"http.server.request.duration"}[5m]))

histogram_quantile(0.95, rate({"http.server.request.duration_seconds"}[5m]))

histogram_quantile(0.95, rate({"http.server.request.duration_seconds_bucket"}[5m]))

histogram_quantile(0.95, rate({"http.server.request.duration_bucket"}[5m]))

histogram_quantile(0.95, rate(http_server_request_duration_bucket[5m]))

histogram_quantile(0.95, rate(http_server_request_duration_seconds_bucket[5m]))

Obligatori

Suppose you’ve defined your own OpenTelemetry metric in Go to track how far your robot has traveled:

counter, _ := meter.Float64ObservableCounter("robot.distance.traveled",
metric.WithUnit("mm")
)
// Call counter.Add() each time the robot moves.

Which of the following would you expect to write (regardless of what is valid/correct today), (select all that apply):
*

rate({"robot.distance.traveled"}[5m])

rate({"robot.distance.traveled_millimeters"}[5m])

rate({"robot.distance.traveled_millimeters_total"}[5m])

rate({"robot.distance.traveled_total"}[5m])

rate(robot_distance_traveled[5m])

rate(robot_distance_traveled_millimeters_total[5m])

Obligatori

Imagine you know that your node’s OpenTelemetry instrumentation defines a node.time metric, but you don’t remember its unit. Someone complains about a flaky alert, so you open a YAML file with your alert configuration. Which of the following you prefer the most (select all that apply):
*

expr: timestamp(node_time) - (1e-9 * node_time) > 5

expr: timestamp({"node.time"}) - (1e-9 * {"node.time"}) > 5

expr: timestamp(node_time_nanoseconds) - (1e-9 * node_time_nanoseconds) > 5

expr: timestamp({"node.time_nanoseconds"}) - (1e-9 * {"node.time_nanoseconds"}) > 5

Obligatori

Which of the following describes your opinion on units in metric names (select one):
*

Units should be required to be part of the metric name. Without them, it is hard to write proper queries, write or read alerts e.g. in YAML, and build dashboards.

We should recommend adding units to metric names, for the reasons above, but let users decide if they should add them or not.

Units should generally not be added to metric names. Instead, units should be separate metadata, like the metric description. If you need to know the units for queries in alerts and dashboards, you will go look them up.

Units should generally not be added to metric names, but base units (seconds, meters, etc.) should be required.

I don’t care, but don’t modify metric names.

I don’t care, but just don’t break whatever the current behavior is.

Which of the following describes your opinion on dots vs underscores in metric names (select one):
*

All dots should be changed to underscores when translating to Prometheus. That way, metric names match the format used by the rest of the Prometheus ecosystem.

I wish OpenTelemetry had chosen to use underscores to match Prometheus syntactic requirements, but we should leave the dots in-place.

I wish OpenTelemetry had chosen to use underscores to match Prometheus syntactic requirements, I believe this decision should be revisited, it’s worth the time and breaking existing OTel users.

I like the dots better, and am glad OpenTelemetry chose to use them in metric names, let’s make sure dots works better in Prometheus

I don’t care, but don’t modify OpenTelemetry metric names.

I don’t care, but don’t break whatever the current behavior is.

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