Input CRD YAML
Configuration Options
Sample Generation Options
Generate sample values for non-required properties
Prefer example values from the schema over generated ones
Add apiVersion, kind, metadata fields to the sample
Sample YAML Output
How to Use
- Enter or paste your Kubernetes Custom Resource Definition (CRD) YAML in the input field on the left.
- Configure the generation options based on your needs:
- Include optional fields: Generate sample values for non-required properties
- Use schema examples: Prefer example values from the schema when available
- Include metadata: Add standard Kubernetes metadata fields
- Click the "Generate Sample YAML" button to create a sample resource.
- The generated sample YAML will appear in the output field on the right.
- Use "Copy to Clipboard" or "Download YAML" to save your result.
Examples
Simple CRD Example
Input CRD:
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: myapps.example.com
spec:
group: example.com
versions:
- name: v1
schema:
openAPIV3Schema:
type: object
properties:
spec:
type: object
properties:
replicas:
type: integer
image:
type: string
Generated Sample:
apiVersion: example.com/v1 kind: MyApp metadata: name: sample-myapp namespace: default spec: replicas: 3 image: "nginx:latest"
Complex CRD with Arrays
Input CRD:
spec:
versions:
- name: v1
schema:
openAPIV3Schema:
type: object
properties:
spec:
type: object
properties:
containers:
type: array
items:
type: object
properties:
name:
type: string
ports:
type: array
items:
type: integer
Generated Sample:
spec:
containers:
- name: "container-1"
ports:
- 8080
- 9090
Supported Schema Types
- • string: Generates sample text values
- • integer/number: Generates numeric values
- • boolean: Generates true/false values
- • array: Generates arrays with sample items
- • object: Generates nested objects
- • enum: Picks first enum value
- • examples: Uses provided example values
Use Cases
- • Testing custom resources locally
- • Creating documentation examples
- • Understanding CRD structure
- • Generating template manifests
- • API development and testing
- • Kubernetes operator development
About Kubernetes CRD to Sample YAML
This tool helps Kubernetes developers and operators generate sample YAML manifests from Custom Resource Definitions (CRDs). It's particularly useful for:
- Understanding the structure and requirements of custom resources
- Creating example manifests for documentation
- Testing custom resources during development
- Generating templates for Kubernetes operators
- Learning about OpenAPI v3 schema specifications
- Validating CRD schemas before deployment
The tool parses the OpenAPI v3 schema from your CRD and intelligently generates sample values based on the field types, constraints, and examples defined in the schema. It supports complex nested structures, arrays, enums, and all standard JSON schema types.