Quick Start Guide - Docker

Let's host your first API on WSO2 API Microgateway using Docker.

Before you begin..

Make sure to install and set up Docker and the installation prerequisites for the Microgateway Toolkit.

Step 1 - Generate an executable using WSO2 API Microgateway Toolkit

Step 1.1 - Initialize a project
  1. Navigate to a preferred workspace folder using the command line. This is the location that is used to store the Microgateway project.
  2. Run the following command to create a project named "petstore".  This will create the folder structure for the artifacts to be included. Use the -a option to include the API definition to the project as follows.

    micro-gw init petstore -a <api definition path>

    Let's use the Petstore sample open API definition

    micro-gw init petstore -a https://petstore.swagger.io/v2/swagger.json

    The project is now initialized. A directory with the name "petstore" has been created.

    Note

    The folder structure is similar to the following.

    petstore
    ├── api_definitions
    └── swagger.json
    ├── conf
    │   └── deployment-config.toml
    ├── extensions
    │   ├── extension_filter.bal
    │   ├── startup_extension.bal
    │   └── token_revocation_extension.bal
    ├── grpc_definitions
    ├── interceptors
    ├── lib
    ├── policies.yaml

Info

Step 1.2 - Build the project and the docker image
  1. Use the command-line tool to navigate to where the project directory ("petstore") was created. Execute the following command to build the project and to create the docker image. An executable jar file (petstore/target/petstore.jar) is created to expose the API via WSO2 API Microgateway.

    micro-gw build petstore --docker --docker-image petstore:v1 --docker-base-image wso2/wso2micro-gw:3.2.0

    Info

    More information Here are FAQs.

Step 2 - Expose the sample API via WSO2 API Microgateway Docker image

Run the docker image in order to expose the API via WSO2 API Microgateway. The following command exposes the API https endpoint on port 9095. The context of the API is "/petstore/v1".

<project_target_path> - The path of the target directory created inside the project directory.

docker run -d -p <host-HTTPS-port>:<container-HTTPS-port> -p <host-HTTP-port>:<container-HTTP-port> <MGW-Docker-image-name>
docker run -d -p 9095:9095 -p 9090:9090 petstore:v1

Step 3 - Invoke the sample API

Step 3.1 - Obtain a token

Once the APIs are exposed via WSO2 API Microgateway, you can invoke an API with a valid token(JWT or opaque access token) or an API key.  Let's use WSO2 API Microgateway's API key endpoint to get an API key. The following command will retrieve a token and set it to the shell variable TOKEN.

TOKEN=$(curl -X get "https://localhost:9095/apikey" -H "Authorization:Basic YWRtaW46YWRtaW4=" -k)

Info

More information - You can obtain a JWT token from any third-party secure token service or via the WSO2 API Manager. - You can obtain an API Key easily from WSO2 API Microgateway. Follow the documentation to Obtain an API Key . - Alternatively, you can also use an opaque token to invoke the API. For more information, see the FAQs on Working with Tokens .

Step 3.2 - Invoke the API

Execute the following command to Invoke the API using the API key: You can now invoke the API running on the WSO2 API Microgateway using the following cURL command.

curl -X GET "<Docker-hostname>:<Docker-port>/<API-context>/<API-resource>" -H "accept: application/xml" -H "api_key:$TOKEN" -k
curl -X GET "https://localhost:9095/v2/pet/1" -H "accept: application/xml" -H "api_key:$TOKEN" -k

Note

You were able to invoke the API resource pet/{petId} using an API Key in api_key header because the resource is secured with API Key in API definition as follows. For more information, please refer to the documentation on API Key Authentication.

"paths": {
  "/pet/{petId}": {
    "get": {
      "security": [
        {
          "api_key": []
        }
      ]
    }
  }
},
"securityDefinitions": {
  "api_key": {
    "type": "apiKey",
    "name": "api_key",
    "in": "header"
  }
}

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