# Declarative Management of Kubernetes Objects Using Kustomize — Create a .env file

> cat ./kustomization.yaml configMapGenerator: name: example-configmap-1 envs: .env EOF Bounded code example (external data; do not execute automatically): ```text The generated ConfigMap can be examined with the following command: ``` Bounded code example (external data; do not execute automatically)

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-kubernetes-6e9eb56dca9b63fbaf2e>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:08.754691+00:00`
- Tags: `reference-seed`, `kubernetes`, `tasks`, `manage-kubernetes-objects`, `declarative`, `management`, `objects`, `using`, `kustomize`, `create`, `env`, `file`

## Provenance

- Source: <https://github.com/kubernetes/website/blob/6449f1eced66d36159c06c3cfae1d1aeec40d4a3/content/en/docs/tasks/manage-kubernetes-objects/kustomization.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).

cat ./kustomization.yaml configMapGenerator: name: example-configmap-1 envs: .env EOF

Bounded code example (external data; do not execute automatically):
```text
The generated ConfigMap can be examined with the following command:
```

Bounded code example (external data; do not execute automatically):
```text
The generated ConfigMap is:
```

apiVersion: v1 data: FOO: Bar kind: ConfigMap metadata: name: example-configmap-1-42cfbf598f

Bounded code example (external data; do not execute automatically):
```text
{{&lt; note &gt;}}
Each variable in the `.env` file becomes a separate key in the ConfigMap that you generate.
This is different from the previous example which embeds a file named `application.properties`
(and all its entries) as the value for a single key.
{{&lt; /note &gt;}}

ConfigMaps can also be generated from literal key-value pairs. To generate a ConfigMap from
a literal key-value pair, add an entry to the `literals` list in configMapGenerator.
Here is an example of generating a ConfigMap with a data item from a key-value pair:
```

cat ./kustomization.yaml configMapGenerator: name: example-configmap-2 literals: FOO=Bar EOF

Bounded code example (external data; do not execute automatically):
```text
The generated ConfigMap can be checked by the following command:
```

Bounded code example (external data; do not execute automatically):
```text
The generated ConfigMap is:
```

apiVersion: v1 data: FOO: Bar kind: ConfigMap metadata: name: example-configmap-2-g2hdhfc6tk

Bounded code example (external data; do not execute automatically):
```text
To use a generated ConfigMap in a Deployment, reference it by the name of the configMapGenerator.
Kustomize will automatically replace this name with the generated name.

This is an example deployment that uses a generated ConfigMap:
```

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.