# Container Resource Attributes Collection for Telemetry Data

For Docker environments, some of the Kfuse APM UI relies on the `container_id` attribute that attaches to the Resource attributes of the telemetry data received by Kloudfuse. In OpenTelemetry, this attachment is accomplished at the language SDK.

The following list provides the necessary information for you to properly configure your deployment when running on a Docker CGroupv2 environment.

## Supported Languages

### .Net
- Has `container_id` support.

### C++
- No `container_id` support.

### Go
- No `container_id` support.
- Pending unmerged OpenTelemetry PR [Detect container id on cgroup v2 #3501](https://github.com/open-telemetry/opentelemetry-go/issues/3501).

### Java
- Has `container_id` support.

### JavaScript and Node.js
- Has `container_id` support.
- Use [OpenTelemetry Resource Detector for Container](https://www.npmjs.com/package/@opentelemetry/resource-detector-container). Pinned to version 0.2.2. Versions 0.3.* does not work; see [opentelemetry-resource-detector-container does not detect the container id on 0.3.4/0.3.7](https://github.com/open-telemetry/opentelemetry-js-contrib/issues/2073).

### Kotlin
- Has `container_id` support.
- Uses same SDK as Java.

### PHP
- Has `container_id` support.

### Python
- Has `container_id` support.
- Pending publication of [resource/opentelemetry-resource-detector-container](https://github.com/open-telemetry/opentelemetry-python-contrib/tree/main/resource/opentelemetry-resource-detector-container) to PyPI. As a workaround, use the following in `requirements.txt` file:
  
    ```console
    opentelemetry-resource-detector-container @ git+https://github.com/open-telemetry/opentelemetry-python-contrib.git@0.43b0hotfix#subdirectory=resource/opentelemetry-resource-detector-container
    ```

If using automatic instrumentation, add the following environment variable:

```yaml
OTEL_EXPERIMENTAL_RESOURCE_DETECTORS=container
```

### Ruby
- Has `container_id` support.
- Use [OpenTelemetry::Resource::Detector::Container](https://github.com/open-telemetry/opentelemetry-ruby-contrib/blob/main/resources/container/README.md).

### Rust
- No `container_id` support.
- Refer to code and documentation for [OpenTelemetry Resource Detectors](https://github.com/open-telemetry/opentelemetry-rust-contrib/tree/main/opentelemetry-resource-detectors/src).