Add container metric fields (from ECS) (#282)

Signed-off-by: ChrsMark <chrismarkou92@gmail.com>
Co-authored-by: Joao Grassi <5938087+joaopgrassi@users.noreply.github.com>

.chloggen/add_new_container_metrics.yaml

@@ -0,0 +1,21 @@
+# 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: "container"
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Add new container metrics for `cpu`, `memory`, `disk` and `network`"
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [282, 72]
+
+# (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/container.md

@@ -11,6 +11,7 @@
 | `container.command` | string | The command used to run the container (i.e. the command name). [1] | `otelcontribcol` |
 | `container.command_args` | string[] | All the command arguments (including the command/executable itself) run by the container. [2] | `[otelcontribcol, --config, config.yaml]` |
 | `container.command_line` | string | The full command run by the container as a single string representing the full command. [2] | `otelcontribcol --config config.yaml` |
+| `container.cpu.state` | string | The CPU state for this data point. | `user`; `kernel` |
 | `container.id` | string | Container ID. Usually a UUID, as for example used to [identify Docker containers](https://docs.docker.com/engine/reference/run/#container-identification). The UUID might be abbreviated. | `a3bf90e006b2` |
 | `container.image.id` | string | Runtime specific image identifier. Usually a hash algorithm followed by a UUID. [2] | `sha256:19c92d0a00d1b66d897bceaa7319bee0dd38a10a851c60bcec9474aa3f01e50f` |
 | `container.image.name` | string | Name of the image the container was built on. | `gcr.io/opentelemetry/operator` |
@@ -27,4 +28,12 @@ K8s defines a link to the container registry repository with digest `"imageID":
 The ID is assinged by the container runtime and can vary in different environments. Consider using `oci.manifest.digest` if it is important to identify the same image in different environments/runtimes.
 
 **[3]:** [Docker](https://docs.docker.com/engine/api/v1.43/#tag/Image/operation/ImageInspect) and [CRI](https://github.com/kubernetes/cri-api/blob/c75ef5b473bbe2d0a4fc92f82235efd665ea8e9f/pkg/apis/runtime/v1/api.proto#L1237-L1238) report those under the `RepoDigests` field.
+
+`container.cpu.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 |
+|---|---|
+| `user` | When tasks of the cgroup are in user mode (Linux). When all container processes are in user mode (Windows). |
+| `system` | When CPU is used by the system (host OS) |
+| `kernel` | When tasks of the cgroup are in kernel mode (Linux). When all container processes are in kernel mode (Windows). |
 <!-- endsemconv -->

docs/system/container-metrics.md

@@ -0,0 +1,105 @@
+<!--- Hugo front matter used to generate the website version of this page:
+linkTitle: Container
+--->
+
+# Semantic Conventions for Container Metrics
+
+**Status**: [Experimental][DocumentStatus]
+
+## Container Metrics
+
+### Metric: `container.cpu.time`
+
+This metric is [opt-in][MetricOptIn].
+
+<!-- semconv metric.container.cpu.time(metric_table) -->
+| Name     | Instrument Type | Unit (UCUM) | Description    |
+| -------- | --------------- | ----------- | -------------- |
+| `container.cpu.time` | Counter | `s` | Total CPU time consumed [1] |
+
+**[1]:** Total CPU time consumed by the specific container on all available CPU cores
+<!-- endsemconv -->
+
+<!-- semconv metric.container.cpu.time(full) -->
+| Attribute  | Type | Description  | Examples  | Requirement Level |
+|---|---|---|---|---|
+| [`container.cpu.state`](../attributes-registry/container.md) | string | The CPU state for this data point. A container SHOULD be characterized _either_ by data points with no `state` labels, _or only_ data points with `state` labels. | `user`; `kernel` | Opt-In |
+
+`container.cpu.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 |
+|---|---|
+| `user` | When tasks of the cgroup are in user mode (Linux). When all container processes are in user mode (Windows). |
+| `system` | When CPU is used by the system (host OS) |
+| `kernel` | When tasks of the cgroup are in kernel mode (Linux). When all container processes are in kernel mode (Windows). |
+<!-- endsemconv -->
+
+### Metric: `container.memory.usage`
+
+This metric is [opt-in][MetricOptIn].
+
+<!-- semconv metric.container.memory.usage(metric_table) -->
+| Name     | Instrument Type | Unit (UCUM) | Description    |
+| -------- | --------------- | ----------- | -------------- |
+| `container.memory.usage` | Counter | `By` | Memory usage of the container. [1] |
+
+**[1]:** Memory usage of the container.
+<!-- endsemconv -->
+
+<!-- semconv metric.container.memory.usage(full) -->
+<!-- endsemconv -->
+
+### Metric: `container.disk.io`
+
+This metric is [opt-in][MetricOptIn].
+
+<!-- semconv metric.container.disk.io(metric_table) -->
+| Name     | Instrument Type | Unit (UCUM) | Description    |
+| -------- | --------------- | ----------- | -------------- |
+| `container.disk.io` | Counter | `By` | Disk bytes for the container. [1] |
+
+**[1]:** The total number of bytes read/written successfully (aggregated from all disks).
+<!-- endsemconv -->
+
+<!-- semconv metric.container.disk.io(full) -->
+| Attribute  | Type | Description  | Examples  | Requirement Level |
+|---|---|---|---|---|
+| [`disk.io.direction`](../attributes-registry/disk.md) | string | The disk IO operation direction. | `read` | Recommended |
+| `system.device` | string | The device identifier | `(identifier)` | Recommended |
+
+`disk.io.direction` MUST be one of the following:
+
+| Value  | Description |
+|---|---|
+| `read` | read |
+| `write` | write |
+<!-- endsemconv -->
+
+### Metric: `container.network.io`
+
+This metric is [opt-in][MetricOptIn].
+
+<!-- semconv metric.container.network.io(metric_table) -->
+| Name     | Instrument Type | Unit (UCUM) | Description    |
+| -------- | --------------- | ----------- | -------------- |
+| `container.network.io` | Counter | `By` | Network bytes for the container. [1] |
+
+**[1]:** The number of bytes sent/received on all network interfaces by the container.
+<!-- endsemconv -->
+
+<!-- semconv metric.container.network.io(full) -->
+| Attribute  | Type | Description  | Examples  | Requirement Level |
+|---|---|---|---|---|
+| [`network.io.direction`](../attributes-registry/network.md) | string | The network IO operation direction. | `transmit` | Recommended |
+| `system.device` | string | The device identifier | `(identifier)` | Recommended |
+
+`network.io.direction` MUST be one of the following:
+
+| Value  | Description |
+|---|---|
+| `transmit` | transmit |
+| `receive` | receive |
+<!-- endsemconv -->
+
+[DocumentStatus]: https://github.com/open-telemetry/opentelemetry-specification/tree/v1.22.0/specification/document-status.md
+[MetricOptIn]: https://github.com/open-telemetry/opentelemetry-specification/blob/v1.26.0/specification/metrics/metric-requirement-level.md#opt-in

model/metrics/container.yaml

@@ -0,0 +1,53 @@
+groups:
+  # container.cpu.* metrics and attribute group
+  - id: metric.container.cpu.time
+    type: metric
+    metric_name: container.cpu.time
+    brief: "Total CPU time consumed"
+    note: >
+      Total CPU time consumed by the specific container on all available CPU cores
+    instrument: counter
+    unit: "s"
+    attributes:
+      - ref: container.cpu.state
+        brief: "The CPU state for this data point. A container SHOULD be characterized _either_ by data points with no `state` labels, _or only_ data points with `state` labels."
+        requirement_level: opt_in
+
+  # container.memory.* metrics and attribute group
+  - id: metric.container.memory.usage
+    type: metric
+    metric_name: container.memory.usage
+    brief: "Memory usage of the container."
+    note: >
+      Memory usage of the container.
+    instrument: counter
+    unit: "By"
+
+  # container.disk.io.* metrics and attribute group
+  - id: metric.container.disk.io
+    type: metric
+    metric_name: container.disk.io
+    brief: "Disk bytes for the container."
+    note: >
+      The total number of bytes read/written
+      successfully (aggregated from all disks).
+    instrument: counter
+    unit: "By"
+    attributes:
+      - ref: disk.io.direction
+      - ref: system.device
+
+  # container.network.io.* metrics and attribute group
+  - id: metric.container.network.io
+    type: metric
+    metric_name: container.network.io
+    brief: "Network bytes for the container."
+    note: >
+      The number of bytes sent/received
+      on all network interfaces
+      by the container.
+    instrument: counter
+    unit: "By"
+    attributes:
+      - ref: network.io.direction
+      - ref: system.device

model/registry/container.yaml

@@ -95,3 +95,18 @@ groups:
         brief: >
           Container labels, `<key>` being the label name, the value being the label value.
         examples: [ 'container.label.app=nginx' ]
+      - id: cpu.state
+        brief: "The CPU state for this data point."
+        type:
+          allow_custom_values: true
+          members:
+            - id: user
+              value: 'user'
+              brief: "When tasks of the cgroup are in user mode (Linux). When all container processes are in user mode (Windows)."
+            - id: system
+              value: 'system'
+              brief: "When CPU is used by the system (host OS)"
+            - id: kernel
+              value: 'kernel'
+              brief: "When tasks of the cgroup are in kernel mode (Linux). When all container processes are in kernel mode (Windows)."
+        examples: ["user", "kernel"]