{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Littlest JupyterHub YAML config file",
  "definitions": {
    "Users": {
      "type": "object",
      "properties": {
        "extra_user_groups": {
          "type": "object",
          "items": {
            "type": "string"
          }
        },
        "allowed": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "banned": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "admin": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      }
    },
    "HTTP": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "address": {
          "type": "string",
          "format": "ipv4"
        },
        "port": {
          "type": "integer"
        }
      }
    },
    "HTTPS": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "enabled": {
          "type": "boolean"
        },
        "address": {
          "type": "string",
          "format": "ipv4"
        },
        "port": {
          "type": "integer"
        },
        "tls": {
          "$ref": "#/definitions/TLS"
        },
        "letsencrypt": {
          "$ref": "#/definitions/LetsEncrypt"
        }
      }
    },
    "LetsEncrypt": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "email": {
          "type": "string",
          "format": "email"
        },
        "domains": {
          "type": "array",
          "items": {
            "type": "string",
            "format": "hostname"
          }
        }
      }
    },
    "TLS": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "key": {
          "type": "string"
        },
        "cert": {
          "type": "string"
        }
      },
      "required": ["key", "cert"]
    },
    "Limits": {
      "description": "User CPU and memory limits.",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "memory": {
          "type": "string"
        },
        "cpu": {
          "type": "integer"
        }
      }
    },
    "UserEnvironment": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "default_app": {
          "type": "string",
          "enum": ["jupyterlab", "classic"],
          "default": "jupyterlab"
        }
      }
    }
  },
  "properties": {
    "additionalProperties": false,
    "user_environment": {
      "$ref": "#/definitions/UserEnvironment"
    },
    "users": {
      "$ref": "#/definitions/Users"
    },
    "limits": {
      "$ref": "#/definitions/Limits"
    },
    "https": {
      "$ref": "#/definitions/HTTPS"
    },
    "http": {
      "$ref": "#/definitions/HTTP"
    }
  }
}