@bertelli.luca/helm-schema

JSON Schema generator for your HELM charts.

Project forked from: https://github.com/SocialGouv/helm-schema

Demo: https://banshee86vr.github.io/helm-schema

Usage

Example values.yaml, following JSDoc standards

# @param {object} smtp Your SMTP setup
smtp:
  # @param {string} host SMTP hostname
  host:
  # @param {number} [port] SMTP port
  port: 587

# @param {enum{IfNotPresent,Always,Never}} pullPolicy Specifies whether a container image should be created
pullPolicy: IfNotPresent
# @param {pattern{^.*$}} name Application name validated by a pattern
name: JSONSchemaGenerator
# @param {integer{min=0,max=5}} replicaCount Number of possible replica with a fixed range
replicaCount: 3
# @param {string{minLength=10,maxLength=15}} username Username with limited length range
username: banshee86vr
# @param {string[CreateNamespace=true,Prune=false,SkipDryRunOnMissingResource=true]} syncOptions Options allow you to specify whole app sync-options
syncOptions: []

# Setup your securityContext to reduce security risks, see https://kubernetes.io/docs/tasks/configure-pod-container/security-context/
# @param {https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/v1.24.0/_definitions.json#/definitions/io.k8s.api.core.v1.PodSecurityContext} [securityContext]
securityContext:

To generate a JSON schema from your values.yaml :

npx @bertelli.luca/helm-schema -f values.yaml

Or via TS :

import { toJsonSchema } from "@bertelli.luca/helm-schema";

import yaml from "./values.yaml";

const schema = toJsonSchema(yaml);

You get such JSON schema in result :

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema",
  "required": ["pullPolicy", "name", "replicaCount", "username"],
  "properties": {
    "pullPolicy": {
      "type": ["string", "boolean", "number", "object", "array"],
      "enum": ["IfNotPresent", "Always", "Never"],
      "title": "Specifies whether a container image should be created",
      "default": "IfNotPresent"
    },
    "name": {
      "type": "string",
      "pattern": "^.*$",
      "title": "Application name validated by a pattern",
      "default": "JSONSchemaGenerator"
    },
    "replicaCount": {
      "type": "integer",
      "minimum": 0,
      "maximum": 5,
      "title": "Number of possible replica with a fixed range",
      "default": "3"
    },
    "username": {
      "type": "string",
      "minLength": 10,
      "maxLength": 15,
      "title": "Username with limited length range",
      "default": "banshee86vr"
    },
    "syncOptions": {
      "type": "array",
      "default": [
        "CreateNamespace=true",
        "Prune=false",
        "SkipDryRunOnMissingResource=true"
      ],
      "title": "Options allow you to specify whole app sync-options",
      "items": {
        "type": ["string"]
      }
    }
  }
}

This schema can then be used with your favorite editor for HELM values validation.

⚠️ Be sure to add an $id to the schema if its meant to be referenced from other schemas

Dev

update snapshots : yarn snapshots