{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/api-evangelist/solo-io/blob/main/json-schema/upstream.json",
  "title": "Solo.io Gloo Gateway Upstream",
  "description": "An upstream destination registered with Gloo Gateway, representing a backend service such as a Kubernetes service, static host, AWS Lambda function, or other function provider.",
  "type": "object",
  "properties": {
    "metadata": {
      "$ref": "resource-metadata.json",
      "description": "Resource metadata including name, namespace, and labels."
    },
    "status": {
      "$ref": "resource-status.json",
      "description": "Current status of the upstream resource."
    },
    "upstreamType": {
      "type": "string",
      "enum": ["kube", "static", "aws", "azure", "consul"],
      "description": "Type of upstream destination."
    },
    "host": {
      "type": "string",
      "description": "Hostname or address of the upstream."
    },
    "port": {
      "type": "integer",
      "description": "Port number of the upstream service."
    },
    "serviceSpec": {
      "type": "object",
      "properties": {
        "rest": {
          "type": "object",
          "description": "REST service specification including discovered functions."
        },
        "grpc": {
          "type": "object",
          "description": "gRPC service specification including discovered services."
        }
      },
      "description": "Service specification for function-level routing."
    },
    "sslConfig": {
      "type": "object",
      "description": "TLS/SSL configuration for the upstream connection."
    },
    "healthChecks": {
      "type": "array",
      "items": {
        "type": "object"
      },
      "description": "Health check configuration for the upstream."
    }
  }
}