Overview

You can create and connect to instances on the management console.

To create and use an instance, you need to perform the operations described in the following flowchart.

Figure 1 Process

**Table 1** Operation process
Procedure	Description	Reference
Creating an instance	You can customize the computing resources and storage available to your instance.	Buying a Cluster Instance Buying a Replica Set Instance Buying a Single Node Instance
Binding an EIP	(Optional) When connecting to an instance from the Internet, you need to configure an EIP.	Binding and Unbinding an EIP
Configuring security group rules	(Optional) Add the devices that access the instance to the security group associated with the instance, so you can access the instance from the devices. If you access the instance from an ECS that is in a different security from the instance over a private network, you need to configure the security group rule. If you connect to an instance over a public network, you need to configure security group rules.	Configuring Security Group Rules (Private Network) Configuring Security Group Rules (Public Network)
Connecting to an instance	You can connect to instances through DAS, a private network, a public network, or program code.	Connecting to a Cluster Instance Connecting to a Replica Set Instance Connecting to a Single Node Instance

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