Defining REST API schema in Azure API Management

Question

Pulumi · Accepted Answer

To define a REST API schema in Azure API Management, you need to create an API schema which is a set of definitions and properties that describe your API's data. In Azure API Management, schemas can help document and validate the data for your APIs, providing clarity and control over the data that's being exchanged.

We'll use the `azure-native.apimanagement.Schema` resource for this purpose. The `schemaId`, `value`, `schemaType`, `serviceName`, and `resourceGroupName` are key properties required for defining a schema. The `value` of the schema should contain the schema definition itself, typically in JSON or XML format. The `schemaType` is used to specify the type of the schema (e.g., 'openapi', 'swagger', 'wsdl', etc.).

Here's a Pulumi program in TypeScript that demonstrates how to define a REST API schema in Azure API Management:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure_native from "@pulumi/azure-native";

const resourceGroupName = "my-resource-group"; // Replace with your resource group name
const apiManagementServiceName = "my-apim-service"; // Replace with your API Management service name
const schemaId = "my-api-schema"; // Replace with your schema identifier

// Define the REST API schema
const apiSchema = new azure_native.apimanagement.Schema("apiSchema", {
    resourceGroupName: resourceGroupName,
    serviceName: apiManagementServiceName,
    schemaId: schemaId,
    value: pulumi.interpolate`{
        "openapi": "3.0.1",
        "info": {
            "version": "1.0.0",
            "title": "Swagger Petstore",
            "license": {
                "name": "MIT"
            }
        },
        "servers": [
            {
                "url": "http://petstore.swagger.io/v1"
            }
        ],
        "paths": {
            "/pets": {
                "get": {
                    "summary": "List all pets",
                    "operationId": "listPets",
                    "tags": [
                        "pets"
                    ],
                    "parameters": [
                        {
                            "name": "limit",
                            "in": "query",
                            "description": "How many items to return at one time (max 100)",
                            "required": false,
                            "schema": {
                                "type": "integer",
                                "format": "int32"
                            }
                        }
                    ],
                    "responses": {
                        "200": {
                            "description": "An paged array of pets"
                        }
                    }
                }
            }
        }
    }`,
    schemaType: "openapi",
    // Optional: You can provide a description for this schema
    description: "This is a sample REST API schema for the Swagger Petstore",
});

// Export the Schema ID
export const schemaIdOutput = apiSchema.id;
```

In this program, you need to replace placeholder values like `my-resource-group`, `my-apim-service`, and `my-api-schema` with your own Azure resource group name, API Management service name, and the desired schema ID, respectively. The `value` property contains the schema definition, which we've provided a basic example using the OpenAPI specification for demonstration purposes.

After deploying this Pulumi program, the defined schema will be created and associated with the specified API Management service in Azure.

Make sure that you have set up the [Pulumi Azure Native Provider](https://www.pulumi.com/registry/packages/azure-native/) and you have the necessary permissions to create resources within the Azure subscription you are targeting.