add `nodejs.eventloop.time` metric (#1259)

Co-authored-by: Liudmila Molkova <limolkova@microsoft.com>

.chloggen/nodejs-runtime-utilization.yaml

@@ -0,0 +1,17 @@
+# Use this changelog template to create an entry for release notes.
+#
+# If your change doesn't affect end users you should instead start
+# your pull request title with [chore] or use the "Skip Changelog" label.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the area of concern in the attributes-registry, (e.g. http, cloud, db)
+component: nodejs
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Adding `nodejs.eventloop.time` metric to Node.js runtime metrics.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+# The values here must be integers.
+issues: [1259]

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -59,6 +59,7 @@ body:
         - area:log
         - area:messaging
         - area:network
+        - area:nodejs
         - area:oci
         - area:opentracing
         - area:os

.github/ISSUE_TEMPLATE/change_proposal.yaml

@@ -51,6 +51,7 @@ body:
         - area:log
         - area:messaging
         - area:network
+        - area:nodejs
         - area:oci
         - area:opentracing
         - area:os

.github/ISSUE_TEMPLATE/new-conventions.yaml

@@ -60,6 +60,7 @@ body:
         - area:log
         - area:messaging
         - area:network
+        - area:nodejs
         - area:oci
         - area:opentracing
         - area:os

docs/attributes-registry/README.md

@@ -72,6 +72,7 @@ Currently, the following namespaces exist:
 - [Log](log.md)
 - [Messaging](messaging.md)
 - [Network](network.md)
+- [NodeJS](nodejs.md)
 - [OCI](oci.md)
 - [OpenTracing](opentracing.md)
 - [OS](os.md)

docs/attributes-registry/nodejs.md

@@ -0,0 +1,22 @@
+<!--- Hugo front matter used to generate the website version of this page:
+--->
+
+<!-- NOTE: THIS FILE IS AUTOGENERATED. DO NOT EDIT BY HAND. -->
+<!-- see templates/registry/markdown/attribute_namespace.md.j2 -->
+
+# NodeJS
+
+## Node.js Attributes
+
+Describes Node.js related attributes.
+
+| Attribute                | Type   | Description                   | Examples         | Stability                                                        |
+| ------------------------ | ------ | ----------------------------- | ---------------- | ---------------------------------------------------------------- |
+| `nodejs.eventloop.state` | string | The state of event loop time. | `active`; `idle` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+`nodejs.eventloop.state` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
+
+| Value    | Description  | Stability                                                        |
+| -------- | ------------ | ---------------------------------------------------------------- |
+| `active` | Active time. | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `idle`   | Idle time.   | ![Experimental](https://img.shields.io/badge/-experimental-blue) |

docs/runtime/nodejs-metrics.md

@@ -21,6 +21,7 @@ This document describes semantic conventions for Node.js Runtime metrics in Open
   - [Metric: `nodejs.eventloop.delay.p90`](#metric-nodejseventloopdelayp90)
   - [Metric: `nodejs.eventloop.delay.p99`](#metric-nodejseventloopdelayp99)
   - [Metric: `nodejs.eventloop.utilization`](#metric-nodejseventlooputilization)
+  - [Metric: `nodejs.eventloop.time`](#metric-nodejseventlooptime)
 
 <!-- tocstop -->
 
@@ -316,7 +317,7 @@ This metric is [recommended][MetricRecommended].
 | `nodejs.eventloop.utilization` | Gauge | `1` | Event loop utilization. [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 
 
-**[1]:** The value range is [0.0,1.0] and can be retrieved from value [`performance.eventLoopUtilization([utilization1[, utilization2]])`](https://nodejs.org/api/perf_hooks.html#performanceeventlooputilizationutilization1-utilization2)
+**[1]:** The value range is [0.0, 1.0] and can be retrieved from [`performance.eventLoopUtilization([utilization1[, utilization2]])`](https://nodejs.org/api/perf_hooks.html#performanceeventlooputilizationutilization1-utilization2)
 
 
 
@@ -333,6 +334,56 @@ This metric is [recommended][MetricRecommended].
 <!-- markdownlint-disable -->
 
 
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `nodejs.eventloop.time`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.nodejs.eventloop.time(metric_table) -->
+<!-- NOTE: THIS TEXT IS AUTOGENERATED. DO NOT EDIT BY HAND. -->
+<!-- see templates/registry/markdown/snippet.md.j2 -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-capture -->
+<!-- markdownlint-disable -->
+
+| Name     | Instrument Type | Unit (UCUM) | Description    | Stability |
+| -------- | --------------- | ----------- | -------------- | --------- |
+| `nodejs.eventloop.time` | Counter | `s` | Cumulative duration of time the event loop has been in each state. [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+
+**[1]:** Value can be retrieved from [`performance.eventLoopUtilization([utilization1[, utilization2]])`](https://nodejs.org/api/perf_hooks.html#performanceeventlooputilizationutilization1-utilization2)
+
+
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+<!-- semconv metric.nodejs.eventloop.time(full) -->
+<!-- NOTE: THIS TEXT IS AUTOGENERATED. DO NOT EDIT BY HAND. -->
+<!-- see templates/registry/markdown/snippet.md.j2 -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-capture -->
+<!-- markdownlint-disable -->
+
+| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
+|---|---|---|---|---|---|
+| [`nodejs.eventloop.state`](/docs/attributes-registry/nodejs.md) | string | The state of event loop time. | `active`; `idle` | `Required` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+`nodejs.eventloop.state` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
+
+| Value  | Description | Stability |
+|---|---|---|
+| `active` | Active time. | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `idle` | Idle time. | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+
+
 <!-- markdownlint-restore -->
 <!-- prettier-ignore-end -->
 <!-- END AUTOGENERATED TEXT -->

model/metrics/nodejs-metrics.yaml

@@ -77,5 +77,19 @@ groups:
     unit: "1"
     stability: experimental
     note: >
-      The value range is [0.0,1.0] and can be retrieved from value
+      The value range is [0.0, 1.0] and can be retrieved from
+      [`performance.eventLoopUtilization([utilization1[, utilization2]])`](https://nodejs.org/api/perf_hooks.html#performanceeventlooputilizationutilization1-utilization2)
+
+  - id: metric.nodejs.eventloop.time
+    type: metric
+    metric_name: nodejs.eventloop.time
+    brief: "Cumulative duration of time the event loop has been in each state."
+    instrument: counter
+    unit: "s"
+    stability: experimental
+    attributes:
+      - ref: nodejs.eventloop.state
+        requirement_level: required
+    note: >
+      Value can be retrieved from
       [`performance.eventLoopUtilization([utilization1[, utilization2]])`](https://nodejs.org/api/perf_hooks.html#performanceeventlooputilizationutilization1-utilization2)

model/registry/nodejs.yaml

@@ -0,0 +1,19 @@
+groups:
+  - id: registry.nodejs
+    type: attribute_group
+    brief: Describes Node.js related attributes.
+    display_name: Node.js Attributes
+    attributes:
+      - id: nodejs.eventloop.state
+        stability: experimental
+        brief: The state of event loop time.
+        type:
+          members:
+            - id: active
+              value: 'active'
+              brief: 'Active time.'
+              stability: experimental
+            - id: idle
+              value: 'idle'
+              brief: 'Idle time.'
+              stability: experimental