[k8s] Add k8s node allocatable metrics

Signed-off-by: odubajDT <[email protected]>

Author: odubajDT

.chloggen/add-k8s-allocatable-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.node.allocatable_cpu`, `k8s.node.allocatable_ephemeral_storage`, `k8s.node.allocatable_memory`, `k8s.node.allocatable_pods` 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: [2243]
+
+# (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/system/k8s-metrics.md

@@ -26,6 +26,10 @@ and therefore inherit its attributes, like `k8s.pod.name` and `k8s.pod.uid`.
   - [Metric: `k8s.pod.network.errors`](#metric-k8spodnetworkerrors)
 - [Node metrics](#node-metrics)
   - [Metric: `k8s.node.uptime`](#metric-k8snodeuptime)
+  - [Metric: `k8s.node.allocatable_cpu`](#metric-k8snodeallocatable_cpu)
+  - [Metric: `k8s.node.allocatable_memory`](#metric-k8snodeallocatable_memory)
+  - [Metric: `k8s.node.allocatable_ephemeral_storage`](#metric-k8snodeallocatable_ephemeral_storage)
+  - [Metric: `k8s.node.allocatable_pods`](#metric-k8snodeallocatable_pods)
   - [Metric: `k8s.node.cpu.time`](#metric-k8snodecputime)
   - [Metric: `k8s.node.cpu.usage`](#metric-k8snodecpuusage)
   - [Metric: `k8s.node.memory.usage`](#metric-k8snodememoryusage)
@@ -256,6 +260,86 @@ The actual accuracy would depend on the instrumentation and operating system.
 <!-- END AUTOGENERATED TEXT -->
 <!-- endsemconv -->
 
+### Metric: `k8s.node.allocatable_cpu`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.node.allocatable_cpu -->
+<!-- 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.node.allocatable_cpu` | Gauge | `{cpu}` | Amount of cpu allocatable on the node | ![Development](https://img.shields.io/badge/-development-blue) |  |
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.node.allocatable_memory`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.node.allocatable_memory -->
+<!-- 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.node.allocatable_memory` | Gauge | `By` | Amount of memory allocatable on the node | ![Development](https://img.shields.io/badge/-development-blue) |  |
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.node.allocatable_ephemeral_storage`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.node.allocatable_ephemeral_storage -->
+<!-- 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.node.allocatable_ephemeral_storage` | Gauge | `By` | Amount of ephemeral-storage allocatable on the node | ![Development](https://img.shields.io/badge/-development-blue) |  |
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
+### Metric: `k8s.node.allocatable_pods`
+
+This metric is [recommended][MetricRecommended].
+
+<!-- semconv metric.k8s.node.allocatable_pods -->
+<!-- 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.node.allocatable_pods` | Gauge | `` | Amount of pods allocatable on the node | ![Development](https://img.shields.io/badge/-development-blue) |  |
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+<!-- END AUTOGENERATED TEXT -->
+<!-- endsemconv -->
+
 ### Metric: `k8s.node.cpu.time`
 
 This metric is [recommended][MetricRecommended].

model/k8s/metrics.yaml

@@ -74,6 +74,34 @@ groups:
       The actual accuracy would depend on the instrumentation and operating system.
     instrument: gauge
     unit: "s"
+  - id: metric.k8s.node.allocatable_cpu
+    type: metric
+    metric_name: k8s.node.allocatable_cpu
+    stability: development
+    brief: "Amount of cpu allocatable on the node"
+    instrument: gauge
+    unit: "{cpu}"
+  - id: metric.k8s.node.allocatable_ephemeral_storage
+    type: metric
+    metric_name: k8s.node.allocatable_ephemeral_storage
+    stability: development
+    brief: "Amount of ephemeral-storage allocatable on the node"
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.node.allocatable_memory
+    type: metric
+    metric_name: k8s.node.allocatable_memory
+    stability: development
+    brief: "Amount of memory allocatable on the node"
+    instrument: gauge
+    unit: "By"
+  - id: metric.k8s.node.allocatable_pods
+    type: metric
+    metric_name: k8s.node.allocatable_pods
+    stability: development
+    brief: "Amount of pods allocatable on the node"
+    instrument: gauge
+    unit: ""
   # k8s.node.cpu.* metrics
   - id: metric.k8s.node.cpu.time
     type: metric