Migrating the APIs to a Different Environment

If you maintain multiple environments of the same API Manager version and you want to move all created APIs from one environment to another (such as moving from a development environment to a QA environment or from a QA environment to a production environment), you can migrate the APIs to the new environment by following the steps below:

Deploying the API import/export tool

Download WSO2 API Manager 2.0.0 from http://wso2.com/products/api-manager/.
Download the latest WSO2 API import/export tool from here.

Note that the import/export tool attached is specific to this version of API Manager.
Copy the downloaded api-import-export-<product-version>-<tool-version>.war file to the <APIM_HOME>/repository/deployment/server/webapps folder.
Start the API Manager. If the server is already started, the file is automatically deployed as hot deployment is enabled.

Exporting an API

After successfully deploying the import/export tool, you can export an existing API as a .zip archive. Issue the following cURL command using the command line:

curl -H "Authorization:Basic <base64-encoded-credentials-separated-by-a-colon>" 
-X GET "https://<APIM_HOST:Port>/api-import-export-<product-version>-<tool-version>/export-api?name=<API-name>&version=<API-version>
&provider=<API-provider>" -k > <exportedApiName>.zip

To obtain <base64-encoded-credentials-separated-by-a-colon> use a base64 encoder (e.g., https://www.base64encode.org/) to encode your username and password which has admin role using the following format: <username>:<password> Thereafter, enter the encoded value for this parameter.

Here's an example:

curl -H "Authorization:Basic AbCdEfG" -X GET 
"https://<host>:9443/api-import-export-<product-version>-<tool-version>/export-api?name=PizzaShackAPI&version=1.0&provider=admin" 
-k > myExportedAPI.zip

Importing an API

You can use the archive created in the previous section to import APIs to an API Manager instance.

Make sure the API Manager is started and the import/export tool is deployed.

Run the following cURL command:

curl -H "Authorization:Basic <base64-encoded-username-and-password-separated-by-a-colon>" 
-F file=@"full/path/to/the/zip/file" -k -X POST "https://<APIManagerHost:Port>/api-import-export-<product-version>-<tool-version>/import-api"

Here's an example:

curl -H "Authorization:Basic AbCdEfG" -F file=@"/Desktop/MyAPIFolder/myExportedAPI.zip" -k -X POST "https://<host>:9443/api-import-export-<product-version>-<tool-version>/import-api"

You must add a parameter named preserveProvider to the cURL command and set its value to false if the API is imported to a different domain than its exported one. This parameter sets the provider of the imported API to the user who is issuing the cURL command. Here's an example:

curl -H "Authorization:Basic AbCdEfG" -F file=@"/Desktop/MyAPIFolder/myExportedAPI.zip" -k -X POST "https://<host>:9443/api-import-export-<product-version>-<tool-version>/import-api?preserveProvider=false"

API import/export in a tenanted environment

To export an API from a tenant, follow the steps in Export an API. Use the tenant-specific encoded credentials in the cURL command. Here's an example:

curl -H "Authorization:Basic AbCdEfG" -X GET "https://<host>:port/api-import-export-2.0.0-v3/export-api?name=sample&version=1.0.0&provider=user@domain.com" -k > exportedApiName.zip

To import the API in another tenant, follow the steps in Importing an API. Use the encoded credentials for this tenant in the cURL command. Here's an example:
```
curl -H "Authorization:Basic AbCdEfG" -F file=@"/home/user/Desktop/exportedApiName.zip" -k -X POST "https://<host>:port/api-import-export-2.0.0-v3/import-api?preserveProvider=false"
```
Note that the preserveProvider parameter value should be set to false.

Understanding the API import/export tool

The API import/export tool uses a RESTful API, protected by basic authentication. Only users with admin role are allowed to access it in the initial phase. To allow access to the import/export feature only for a particular tenant, log in to WSO2 API Manager's Management Console and add the downloaded archive file as a web application to the server.

To access API import/export, you need to assign the admin role to the user.

'admin' role is the default role which is specified in the Realm configuration in <APIM-HOME>/repository/conf/user-mgt.xml. It will be changed if you have changed this <AdminRole> value in below configuration.

<Realm>
        <Configuration>
		<AddAdmin>true</AddAdmin>
            <AdminRole>admin</AdminRole>            
         .....
       </Configuration>
</Realm>

The export functionality

API export functionality retrieves the information required for the requested API from the registry and databases and generates a ZIP file, which the exporter can download. This exported ZIP file has the following structure:

The structure of the ZIP file is explained below:

Sub directory/File	Description
Meta Information	api.json: contains all the basic information required for an API to be imported to another environment swagger.json: contains the API swagger definition
Documents	docs.json: contains the summary of all the documents available for the API Add the uploaded files for API documentation also
Image	Thumbnail image of the API
WSDL	WSDL file of the API
Sequences	The sequences available for the API

Given below is the RESTful API for the export functionality. It is secured using Basic Authentication.

Parameter	Description
URI	`https://<host name>:9443/api-import-export-<product-version>-<tool-version>/export-api`
Query parameters	`name=<api_name>&version=<api_version>&provider=<provider_name>`
HTTP method	GET
Examples	curl -H "Authorization:Basic YWRtaW46YWRtaW4=" -X GET "https://<host>:9443/api-import-export-<product-version>-<tool-version>/export-api? name=test&version=1.0.0&provider=admin" It gives a data stream as the output. To download it as a zipped archive, use the following command: curl -H "Authorization:Basic YWRtaW46YWRtaW4=" -X GET "https://<host>:9443/api-import-export-<product-version>-<tool-version>/export-api?name=test &version=1.0.0&provider=admin" -k > exportedApi.zip To verify the output status of the API call: curl -v -H "Authorization:Basic YWRtaW46YWRtaW4=" -X GET "https://<host>:9443/api-import-export-<product-version>-<tool-version>/export-api?name=test&version=1.0.0&provider=admin" -k > exportedApi.zip

The import functionality

The import functionality uploads the exported ZIP file of the API to the target environment. It creates a new API with all the registry and database resources exported from the source environment. Note the following:

The lifecycle status of an imported API will always be CREATED even when the original API in the source environment has a different state. This is to enable the importer to modify the API before publishing it.
Tiers and sequences are provider-specific. If an exported tier is not already available in the imported environment, that tier is not added to the new environment. However, if an exported sequence is not available in the imported environment, it is added.
The importer can decide whether to keep the original provider’s name or replace it. Set the preserveProvider parameter to true to keep it. If you set it to false, the original provider is replaced by the user who is sending the cURL command.
Cross-tenant imports are not allowed by preserving the original provider. For example, if an API is exported from tenant A and imported to tenant B, the valve of the preserveProvider parameter must always be false.

Given below is the RESTful API for the import functionality.

Parameter	Description
URI	`https://<host>:9443/api-import-export-<product-version>-<tool-version>/import-api`
Query parameters	preserveProvider=<true\|false>
HTTP method	POST
Example	Imports the API with the original provider preserved: `curl -H "Authorization:Basic YWRtaW46YWRtaW4=" -F file=@"full/path/to/the/zip/file" -k -X POST "https://<host>:9443/api-import-export-<product-version>-<tool-version>/import-api"` Imports the API with the provider set to the current user: `curl -H "Authorization:Basic YWRtaW46YWRtaW4=" -F file=@"full/path/to/the/zip/file" -k -X POST "https://<host>:9443/api-import-export-<product-version>-<tool-version>/import-api?preserveProvider=false"`