# Kubelet Configuration Directory Merging — Maps, including Nested Structures

> Individual fields in maps, regardless of their value types (boolean, string, etc.), can be selectively overridden.

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-kubernetes-6626aca5ad669dce9d65>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:14.487349+00:00`
- Tags: `reference-seed`, `kubernetes`, `reference`, `node`, `kubelet`, `configuration`, `directory`, `merging`, `maps`, `including`, `nested`, `structures`

## Provenance

- Source: <https://github.com/kubernetes/website/blob/6449f1eced66d36159c06c3cfae1d1aeec40d4a3/content/en/docs/reference/node/kubelet-config-directory-merging.md>
- Source name: Kubernetes Documentation
- Source revision: `6449f1eced66d36159c06c3cfae1d1aeec40d4a3`
- Source license: `CC-BY-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

Individual fields in maps, regardless of their value types (boolean, string, etc.), can be selectively overridden. However, for mapstringstring, the entire list associated with a specific field gets overridden. Let's understand this better with an example, particularly on fields like featureGates and staticPodURLHeader

Main kubelet configuration file contents

Bounded code example (external data; do not execute automatically):
```yaml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
port: 20250
serializeImagePulls: false
featureGates:
  AllAlpha: false
  MemoryQoS: true
staticPodURLHeader:
  kubelet-api-support:
  - "Authorization: 234APSDFA"
  - "X-Custom-Header: 123"
  custom-static-pod:
  - "Authorization: 223EWRWER"
  - "X-Custom-Header: 456"
```

Contents of a file in --config-dir directory

Bounded code example (external data; do not execute automatically):
```yaml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
featureGates:
  MemoryQoS: false
  KubeletTracing: true
  DynamicResourceAllocation: true
staticPodURLHeader:
  custom-static-pod:
  - "Authorization: 223EWRWER"
  - "X-Custom-Header: 345"
```

The resulting configuration will be as follows

Bounded code example (external data; do not execute automatically):
```yaml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
port: 20250
serializeImagePulls: false
featureGates:
  AllAlpha: false
  MemoryQoS: false
  KubeletTracing: true
  DynamicResourceAllocation: true
staticPodURLHeader:
  kubelet-api-support:
  - "Authorization: 234APSDFA"
  - "X-Custom-Header: 123"
  custom-static-pod:
  - "Authorization: 223EWRWER"
  - "X-Custom-Header: 345"
```

Attribution: Adapted from Kubernetes Documentation under CC-BY-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.