What is a Server Group and Why is it needed ?
Server Groups play a central role in API deployment as they provide
- a way to define a cluster of gateway servers to deploy the projects.
- a mechanism to manage the API lifecycle.
- possibility to have different levels of access to different types of clients.
Many a times you would want to scale the API project to multiple proxies for ease of request handling and load balancing. For such activities, you may want to deploy the same API Project at multiple Gateways (Proxies) for ease of use. This is where a Server Group come into the picture; as a project is deployed on various environments, just adding the gateways to a server group will help you achieve the same.
How to Manage Server Groups ?
This view allows you to add/edit/remove Servers to the API Manager.
Figure 1: Admin section with the Server Groups page displayed
To add a Server Group, click the 
button, and type the name of the new server group you want to add. Select the newly added server group name to get the Servers section on the right side of the Server Group section.
Figure 2: Server Groups page with the Servers section that appears after clicking Add button
Click the Edit
icon to add servers to the environment. This displays the following table that shows the available gateway servers, one or more of which can be added to/removed from the environment by using the 
and 
buttons:
Figure 3: Server Groups page with Available Servers section that appears after clicking Edit button
Click the Save button to save the changes made to the Server Groups.
Click the Cancel button to revert the changes made in the Server Groups view.
To remove a server group, select the particular group name and click the Remove 
button.