Add k8s.namespace.phase metric and attribute

.chloggen/add_k8s_ns_phase.yaml

@@ -0,0 +1,22 @@
+# 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: k8s
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add k8s.namespace.phase metric along with the respective attribute
+
+# 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: [1668]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

docs/attributes-registry/k8s.md

@@ -29,6 +29,7 @@ Kubernetes resource attributes.
 | <a id="k8s-job-name" href="#k8s-job-name">`k8s.job.name`</a> | string | The name of the Job. | `opentelemetry` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | <a id="k8s-job-uid" href="#k8s-job-uid">`k8s.job.uid`</a> | string | The UID of the Job. | `275ecb36-5aa8-4c2a-9c47-d8bb681b9aff` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | <a id="k8s-namespace-name" href="#k8s-namespace-name">`k8s.namespace.name`</a> | string | The name of the namespace that the pod is running in. | `default` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| <a id="k8s-namespace-phase" href="#k8s-namespace-phase">`k8s.namespace.phase`</a> | string | The phase of the K8s namespace. [2] | `active`; `terminating` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | <a id="k8s-node-name" href="#k8s-node-name">`k8s.node.name`</a> | string | The name of the Node. | `node-1` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | <a id="k8s-node-uid" href="#k8s-node-uid">`k8s.node.uid`</a> | string | The UID of the Node. | `1eb3a0c6-0477-4080-a9cb-0cb7db65c6a2` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | <a id="k8s-pod-annotation" href="#k8s-pod-annotation">`k8s.pod.annotation.<key>`</a> | string | The annotation key-value pairs placed on the Pod, the `<key>` being the annotation name, the value being the annotation value. | `k8s.pod.annotation.kubernetes.io/enforce-mountable-secrets=true`; `k8s.pod.annotation.mycompany.io/arch=x64`; `k8s.pod.annotation.data=` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
@@ -65,18 +66,30 @@ Which states:
 Therefore, UIDs between clusters should be extremely unlikely to
 conflict.
 
+**[2] `k8s.namespace.phase`:** This attribute aligns with the `phase` field of the
+[K8s NamespaceStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#namespacestatus-v1-core)
+
+---
+
+`k8s.namespace.phase` 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 namespace phase as described by [K8s API](https://pkg.go.dev/k8s.io/[email protected]/core/v1#NamespacePhase) | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `terminating` | Terminating namespace phase as described by [K8s API](https://pkg.go.dev/k8s.io/[email protected]/core/v1#NamespacePhase) | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
 ---
 
 `k8s.volume.type` 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 |
 |---|---|---|
-| `configMap` | A [configMap](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#configmap) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| `downwardAPI` | A [downwardAPI](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#downwardapi) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| `emptyDir` | An [emptyDir](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#emptydir) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| `local` | A [local](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#local) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| `persistentVolumeClaim` | A [persistentVolumeClaim](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#persistentvolumeclaim) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| `secret` | A [secret](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#secret) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `configMap` | A [configMap](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#configmap) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `downwardAPI` | A [downwardAPI](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#downwardapi) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `emptyDir` | An [emptyDir](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#emptydir) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `local` | A [local](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#local) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `persistentVolumeClaim` | A [persistentVolumeClaim](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#persistentvolumeclaim) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `secret` | A [secret](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#secret) volume | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 
 ## Deprecated Kubernetes Attributes
 

docs/non-normative/k8s-migration.md

@@ -51,6 +51,7 @@ and one for disabling the old schema called `semconv.k8s.disableLegacy`. Then:
   - [K8s DaemonSet metrics](#k8s-daemonset-metrics)
   - [K8s Job metrics](#k8s-job-metrics)
   - [K8s Cronjob metrics](#k8s-cronjob-metrics)
+  - [K8s Namespace metrics](#k8s-namespace-metrics)
 
 <!-- tocstop -->
 
@@ -234,3 +235,21 @@ The changes in their metric types are the following:
 | `k8s.cronjob.active_jobs`                  (type: `gauge`) | `k8s.cronjob.active_jobs` (type: `updowncounter`) |
 
 <!-- prettier-ignore-end -->
+
+### K8s Namespace metrics
+
+The K8s Namespace metrics implemented by the Collector and specifically the
+[k8scluster](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/v0.115.0/receiver/k8sclusterreceiver/documentation.md)
+receiver were introduced as semantic conventions in
+[#1649](https://github.com/open-telemetry/semantic-conventions/pull/1668) (TODO: replace with SemConv version once
+available).
+
+The changes in their metrics are the following:
+
+<!-- prettier-ignore-start -->
+
+| Old (Collector) ![changed](https://img.shields.io/badge/changed-orange?style=flat) | New                                                                                            |
+|------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------|
+| `k8s.namespace.phase`                  (type: `gauge`), 1 for active and 0 for terminating                      | `k8s.namespace.phase` (type: `updowncounter`), with the attribute `k8s.namespace.phase` indicating the phase |
+
+<!-- prettier-ignore-end -->

docs/system/k8s-metrics.md

@@ -65,6 +65,8 @@ and therefore inherit its attributes, like `k8s.pod.name` and `k8s.pod.uid`.
   - [Metric: `k8s.job.max_parallel_pods`](#metric-k8sjobmax_parallel_pods)
 - [CronJob Metrics](#cronjob-metrics)
   - [Metric: `k8s.cronjob.active_jobs`](#metric-k8scronjobactive_jobs)
+- [Namespace Metrics](#namespace-metrics)
+  - [Metric: `k8s.namespace.phase`](#metric-k8snamespacephase)
 
 <!-- tocstop -->
 
@@ -1028,5 +1030,48 @@ This metric SHOULD, at a minimum, be reported against a
 <!-- END AUTOGENERATED TEXT -->
 <!-- endsemconv -->
 
+## Namespace Metrics
+
+**Description:** Namespace level metrics captured under the namespace `k8s.namespace`.
+
+### Metric: `k8s.namespace.phase`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.namespace.phase -->
+<!-- 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 |
+| -------- | --------------- | ----------- | -------------- | --------- |
+| `k8s.namespace.phase` | UpDownCounter | `{namespace}` | Describes number of K8s namespaces that are currently in a given phase. [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+**[1]:** This metric SHOULD, at a minimum, be reported against a
+[`k8s.namespace`](../resource/k8s.md#namespace) resource.
+
+| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
+|---|---|---|---|---|---|
+| [`k8s.namespace.phase`](/docs/attributes-registry/k8s.md) | string | The phase of the K8s namespace. [1] | `active`; `terminating` | `Required` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+**[1] `k8s.namespace.phase`:** This attribute aligns with the `phase` field of the
+[K8s NamespaceStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#namespacestatus-v1-core)
+
+---
+
+`k8s.namespace.phase` 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 namespace phase as described by [K8s API](https://pkg.go.dev/k8s.io/[email protected]/core/v1#NamespacePhase) | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| `terminating` | Terminating namespace phase as described by [K8s API](https://pkg.go.dev/k8s.io/[email protected]/core/v1#NamespacePhase) | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
 [DocumentStatus]: https://opentelemetry.io/docs/specs/otel/document-status
 [MetricRecommended]: /docs/general/metric-requirement-level.md#recommended

model/k8s/metrics.yaml

@@ -442,3 +442,18 @@ groups:
 
       This metric SHOULD, at a minimum, be reported against a
       [`k8s.cronjob`](../resource/k8s.md#cronjob) resource.
+
+  # k8s.namespace.* metrics
+  - id: metric.k8s.namespace.phase
+    type: metric
+    metric_name: k8s.namespace.phase
+    stability: experimental
+    brief: "Describes number of K8s namespaces that are currently in a given phase."
+    instrument: updowncounter
+    unit: "{namespace}"
+    note: |
+      This metric SHOULD, at a minimum, be reported against a
+      [`k8s.namespace`](../resource/k8s.md#namespace) resource.
+    attributes:
+      - ref: k8s.namespace.phase
+        requirement_level: required

model/k8s/registry.yaml

@@ -192,25 +192,43 @@ groups:
           members:
             - id: persistent_volume_claim
               value: 'persistentVolumeClaim'
-              brief: "A [persistentVolumeClaim](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#persistentvolumeclaim) volume"
+              brief: "A [persistentVolumeClaim](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#persistentvolumeclaim) volume"
               stability: experimental
             - id: config_map
               value: 'configMap'
-              brief: "A [configMap](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#configmap) volume"
+              brief: "A [configMap](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#configmap) volume"
               stability: experimental
             - id: downward_api
               value: 'downwardAPI'
-              brief: "A [downwardAPI](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#downwardapi) volume"
+              brief: "A [downwardAPI](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#downwardapi) volume"
               stability: experimental
             - id: empty_dir
               value: 'emptyDir'
-              brief: "An [emptyDir](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#emptydir) volume"
+              brief: "An [emptyDir](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#emptydir) volume"
               stability: experimental
             - id: secret
               value: 'secret'
-              brief: "A [secret](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#secret) volume"
+              brief: "A [secret](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#secret) volume"
               stability: experimental
             - id: local
               value: 'local'
-              brief: "A [local](https://v1-29.docs.kubernetes.io/docs/concepts/storage/volumes/#local) volume"
+              brief: "A [local](https://v1-30.docs.kubernetes.io/docs/concepts/storage/volumes/#local) volume"
+              stability: experimental
+      - id: k8s.namespace.phase
+        stability: experimental
+        brief: >
+          The phase of the K8s namespace.
+        note: |
+          This attribute aligns with the `phase` field of the
+          [K8s NamespaceStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#namespacestatus-v1-core)
+        examples: [ "active", "terminating" ]
+        type:
+          members:
+            - id: active
+              value: 'active'
+              brief: "Active namespace phase as described by [K8s API](https://pkg.go.dev/k8s.io/[email protected]/core/v1#NamespacePhase)"
+              stability: experimental
+            - id: terminating
+              value: 'terminating'
+              brief: "Terminating namespace phase as described by [K8s API](https://pkg.go.dev/k8s.io/[email protected]/core/v1#NamespacePhase)"
               stability: experimental