Add k8s container resource related metrics (#2178)

Signed-off-by: ChrsMark <chrismarkou92@gmail.com>

.chloggen/add_k8s_container_metrics.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 container resource related 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: [2074]
+
+# (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/non-normative/k8s-migration.md

@@ -57,6 +57,7 @@ and one for disabling the old schema called `semconv.k8s.disableLegacy`. Then:
   - [K8s Namespace metrics](#k8s-namespace-metrics)
   - [K8s ResourceQuota resource](#k8s-resourcequota-resource)
   - [K8s ReplicationController resource](#k8s-replicationcontroller-resource)
+  - [K8s Container metrics](#k8s-container-metrics)
 
 <!-- tocstop -->
 
@@ -282,4 +283,27 @@ The changes are the following:
 |---------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------|
 | `k8s.replication_controller.{name,uid}`                                     | `k8s.replicationcontroller.{name,uid}`  |
 
+### K8s Container metrics
+
+The K8s Container 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
+[#2178](https://github.com/open-telemetry/semantic-conventions/pull/2178) (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.container.cpu_limit`                                                          | `k8s.container.cpu.limit`                 |
+| `k8s.container.cpu_request`                                                        | `k8s.container.cpu.request`               |
+| `k8s.container.memory_limit`                                                       | `k8s.container.memory.limit`              |
+| `k8s.container.memory_request`                                                     | `k8s.container.memory.request`            |
+| `k8s.container.storage_limit`                                                      | `k8s.container.storage.limit`             |
+| `k8s.container.storage_request`                                                    | `k8s.container.storage.request`           |
+| `k8s.container.ephemeralstorage_limit`                                                       | `k8s.container.ephemeral_storage.limit`   |
+| `k8s.container.ephemeralstorage_request`                                                     | `k8s.container.ephemeral_storage.request` |
+
 <!-- prettier-ignore-end -->

docs/system/k8s-metrics.md

@@ -65,6 +65,15 @@ and therefore inherit its attributes, like `k8s.pod.name` and `k8s.pod.uid`.
   - [Metric: `k8s.cronjob.active_jobs`](#metric-k8scronjobactive_jobs)
 - [Namespace metrics](#namespace-metrics)
   - [Metric: `k8s.namespace.phase`](#metric-k8snamespacephase)
+- [K8s Container metrics](#k8s-container-metrics)
+  - [Metric: `k8s.container.cpu.limit`](#metric-k8scontainercpulimit)
+  - [Metric: `k8s.container.cpu.request`](#metric-k8scontainercpurequest)
+  - [Metric: `k8s.container.memory.limit`](#metric-k8scontainermemorylimit)
+  - [Metric: `k8s.container.memory.request`](#metric-k8scontainermemoryrequest)
+  - [Metric: `k8s.container.storage.limit`](#metric-k8scontainerstoragelimit)
+  - [Metric: `k8s.container.storage.request`](#metric-k8scontainerstoragerequest)
+  - [Metric: `k8s.container.ephemeral_storage.limit`](#metric-k8scontainerephemeral_storagelimit)
+  - [Metric: `k8s.container.ephemeral_storage.request`](#metric-k8scontainerephemeral_storagerequest)
 
 <!-- tocstop -->
 
@@ -1089,5 +1098,185 @@ This metric is [recommended][MetricRecommended].
 <!-- END AUTOGENERATED TEXT -->
 <!-- endsemconv -->
 
+## K8s Container metrics
+
+**Description:** K8s Container level metrics captured under the namespace `k8s.container`.
+
+### Metric: `k8s.container.cpu.limit`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.cpu.limit -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.cpu.limit` | Gauge | `{cpu}` | Maximum CPU resource limit set for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.cpu.request`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.cpu.request -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.cpu.request` | Gauge | `{cpu}` | CPU resource requested for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.memory.limit`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.memory.limit -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.memory.limit` | Gauge | `By` | Maximum memory resource limit set for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.memory.request`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.memory.request -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.memory.request` | Gauge | `By` | Memory resource requested for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.storage.limit`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.storage.limit -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.storage.limit` | Gauge | `By` | Maximum storage resource limit set for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.storage.request`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.storage.request -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.storage.request` | Gauge | `By` | Storage resource requested for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.ephemeral_storage.limit`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.ephemeral_storage.limit -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.ephemeral_storage.limit` | Gauge | `By` | Maximum ephemeral storage resource limit set for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.container.ephemeral_storage.request`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.container.ephemeral_storage.request -->
+<!-- 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 | Entity Associations |
+| -------- | --------------- | ----------- | -------------- | --------- | ------ |
+| `k8s.container.ephemeral_storage.request` | Gauge | `By` | Ephemeral storage resource requested for the container [1] | ![Development](https://img.shields.io/badge/-development-blue) | `k8s.container` |
+
+**[1]:** See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+
+<!-- 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

@@ -469,3 +469,93 @@ groups:
     attributes:
       - ref: k8s.namespace.phase
         requirement_level: required
+
+  # k8s.container.* metrics
+  - id: metric.k8s.container.cpu.limit
+    type: metric
+    metric_name: k8s.container.cpu.limit
+    stability: development
+    brief: "Maximum CPU resource limit set for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "{cpu}"
+  - id: metric.k8s.container.cpu.request
+    type: metric
+    metric_name: k8s.container.cpu.request
+    stability: development
+    brief: "CPU resource requested for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "{cpu}"
+  - id: metric.k8s.container.memory.limit
+    type: metric
+    metric_name: k8s.container.memory.limit
+    stability: development
+    brief: "Maximum memory resource limit set for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.container.memory.request
+    type: metric
+    metric_name: k8s.container.memory.request
+    stability: development
+    brief: "Memory resource requested for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.container.storage.limit
+    type: metric
+    metric_name: k8s.container.storage.limit
+    stability: development
+    brief: "Maximum storage resource limit set for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.container.storage.request
+    type: metric
+    metric_name: k8s.container.storage.request
+    stability: development
+    brief: "Storage resource requested for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.container.ephemeral_storage.limit
+    type: metric
+    metric_name: k8s.container.ephemeral_storage.limit
+    stability: development
+    brief: "Maximum ephemeral storage resource limit set for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.container.ephemeral_storage.request
+    type: metric
+    metric_name: k8s.container.ephemeral_storage.request
+    stability: development
+    brief: "Ephemeral storage resource requested for the container"
+    entity_associations:
+      - k8s.container
+    note: |
+      See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#resourcerequirements-v1-core for details.
+    instrument: gauge
+    unit: "By"