Add k8s daemonset metrics

.chloggen/add_ds_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 deamonset 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: [1649]
+
+# (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

@@ -48,6 +48,7 @@ and one for disabling the old schema called `semconv.k8s.disableLegacy`. Then:
   - [K8s ReplicationController metrics](#k8s-replicationcontroller-metrics)
   - [K8s StatefulsSet metrics](#k8s-statefulsset-metrics)
   - [K8s HorizontalPodAutoscaler metrics](#k8s-horizontalpodautoscaler-metrics)
+  - [K8s DaemonSet metrics](#k8s-daemonset-metrics)
 
 <!-- tocstop -->
 
@@ -173,3 +174,24 @@ The changes in their metric names and types are the following:
 | `k8s.hpa.min_replicas`                      (type: `gauge`)                        | `k8s.hpa.min_pods`   (type: `updowncounter`)   |
 
 <!-- prettier-ignore-end -->
+
+### K8s DaemonSet metrics
+
+The K8s DaemonSet 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/1649) (TODO: replace with SemConv version once
+available).
+
+The changes in their metric types are the following:
+
+<!-- prettier-ignore-start -->
+
+| Old (Collector) ![changed](https://img.shields.io/badge/changed-orange?style=flat) | New                                                             |
+|------------------------------------------------------------------------------------|-----------------------------------------------------------------|
+| `k8s.daemonset.current_scheduled_nodes`                  (type: `gauge`)           | `k8s.daemonset.current_scheduled_nodes` (type: `updowncounter`) |
+| `k8s.daemonset.desired_scheduled_nodes`                  (type: `gauge`)           | `k8s.daemonset.desired_scheduled_nodes` (type: `updowncounter`) |
+| `k8s.daemonset.misscheduled_nodes`                       (type: `gauge`)           | `k8s.daemonset.misscheduled_nodes`  (type: `updowncounter`)     |
+| `k8s.daemonset.ready_nodes`                      (type: `gauge`)                   | `k8s.daemonset.ready_nodes`   (type: `updowncounter`)           |
+
+<!-- prettier-ignore-end -->

docs/system/k8s-metrics.md

@@ -52,6 +52,11 @@ and therefore inherit its attributes, like `k8s.pod.name` and `k8s.pod.uid`.
   - [Metric: `k8s.hpa.current_pods`](#metric-k8shpacurrent_pods)
   - [Metric: `k8s.hpa.max_pods`](#metric-k8shpamax_pods)
   - [Metric: `k8s.hpa.min_pods`](#metric-k8shpamin_pods)
+- [Daemonset Metrics](#daemonset-metrics)
+  - [Metric: `k8s.daemonset.current_scheduled_nodes`](#metric-k8sdaemonsetcurrent_scheduled_nodes)
+  - [Metric: `k8s.daemonset.desired_scheduled_nodes`](#metric-k8sdaemonsetdesired_scheduled_nodes)
+  - [Metric: `k8s.daemonset.misscheduled_nodes`](#metric-k8sdaemonsetmisscheduled_nodes)
+  - [Metric: `k8s.daemonset.ready_nodes`](#metric-k8sdaemonsetready_nodes)
 
 <!-- tocstop -->
 
@@ -743,5 +748,113 @@ This metric is [recommended][MetricRecommended].
 <!-- END AUTOGENERATED TEXT -->
 <!-- endsemconv -->
 
+## Daemonset Metrics
+
+**Description:** Daemonset level metrics captured under the namespace `k8s.daemonset`.
+
+### Metric: `k8s.daemonset.current_scheduled_nodes`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.daemonset.current_scheduled_nodes -->
+<!-- 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.daemonset.current_scheduled_nodes` | UpDownCounter | `{node}` | Number of nodes that are running at least 1 daemon pod and are supposed to run the daemon pod [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+**[1]:** This metric aligns with the `currentNumberScheduled` field of the
+[K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+This metric SHOULD, at a minimum, be reported against a
+[`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.daemonset.desired_scheduled_nodes`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.daemonset.desired_scheduled_nodes -->
+<!-- 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.daemonset.desired_scheduled_nodes` | UpDownCounter | `{node}` | Number of nodes that should be running the daemon pod (including nodes currently running the daemon pod) [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+**[1]:** This metric aligns with the `desiredNumberScheduled` field of the
+[K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+This metric SHOULD, at a minimum, be reported against a
+[`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.daemonset.misscheduled_nodes`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.daemonset.misscheduled_nodes -->
+<!-- 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.daemonset.misscheduled_nodes` | UpDownCounter | `{node}` | Number of nodes that are running the daemon pod, but are not supposed to run the daemon pod [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+**[1]:** This metric aligns with the `numberMisscheduled` field of the
+[K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+This metric SHOULD, at a minimum, be reported against a
+[`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.daemonset.ready_nodes`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.daemonset.ready_nodes -->
+<!-- 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.daemonset.ready_nodes` | UpDownCounter | `{node}` | Number of nodes that should be running the daemon pod and have one or more of the daemon pod running and ready [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+
+**[1]:** This metric aligns with the `numberReady` field of the
+[K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+This metric SHOULD, at a minimum, be reported against a
+[`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+
+<!-- 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

@@ -306,3 +306,57 @@ groups:
       [K8s HorizontalPodAutoscalerSpec](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#horizontalpodautoscalerspec-v2-autoscaling)
     instrument: updowncounter
     unit: "{pod}"
+
+  # k8s.daemonset.* metrics
+  - id: metric.k8s.daemonset.current_scheduled_nodes
+    type: metric
+    metric_name: k8s.daemonset.current_scheduled_nodes
+    stability: experimental
+    brief: "Number of nodes that are running at least 1 daemon pod and are supposed to run the daemon pod"
+    note: |
+      This metric aligns with the `currentNumberScheduled` field of the
+      [K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+      This metric SHOULD, at a minimum, be reported against a
+      [`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+    instrument: updowncounter
+    unit: "{node}"
+  - id: metric.k8s.daemonset.desired_scheduled_nodes
+    type: metric
+    metric_name: k8s.daemonset.desired_scheduled_nodes
+    stability: experimental
+    brief: "Number of nodes that should be running the daemon pod (including nodes currently running the daemon pod)"
+    note: |
+      This metric aligns with the `desiredNumberScheduled` field of the
+      [K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+      This metric SHOULD, at a minimum, be reported against a
+      [`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+    instrument: updowncounter
+    unit: "{node}"
+  - id: metric.k8s.daemonset.misscheduled_nodes
+    type: metric
+    metric_name: k8s.daemonset.misscheduled_nodes
+    stability: experimental
+    brief: "Number of nodes that are running the daemon pod, but are not supposed to run the daemon pod"
+    note: |
+      This metric aligns with the `numberMisscheduled` field of the
+      [K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+      This metric SHOULD, at a minimum, be reported against a
+      [`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+    instrument: updowncounter
+    unit: "{node}"
+  - id: metric.k8s.daemonset.ready_nodes
+    type: metric
+    metric_name: k8s.daemonset.ready_nodes
+    stability: experimental
+    brief: "Number of nodes that should be running the daemon pod and have one or more of the daemon pod running and ready"
+    note: |
+      This metric aligns with the `numberReady` field of the
+      [K8s DaemonSetStatus](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.30/#daemonsetstatus-v1-apps).
+
+      This metric SHOULD, at a minimum, be reported against a
+      [`k8s.daemonset`](../resource/k8s.md#daemonset) resource.
+    instrument: updowncounter
+    unit: "{node}"