Buying a Cluster Instance

Prerequisites

• You have created a Huawei Cloud account.

Procedure

1. Log in to the GeminiDB console.
2. In the service list, choose Databases > GeminiDB.
3. On the Instances page, click Buy DB Instance.
4. On the displayed page, specify instance specifications and click Next.
   Figure 1 Billing mode and basic information
   

   Table 1 Billing mode description

   Parameter

   Description

   Billing Mode

   Select Yearly/Monthly or Pay-per-use. Yearly/Monthly In this mode, specify Required Duration at the bottom of the page. The system bills you based on the service price. If you do not need such an instance any longer after it expires, change the billing mode to pay-per-use to optimize costs. For details, see Changing the Billing Mode from Yearly/Monthly to Pay-per-Use. NOTE: Yearly/Monthly instances cannot be deleted directly. If such an instance is no longer required, unsubscribe from it. For details, see Unsubscribing from a Yearly/Monthly Instance. Pay-per-use If you select this billing mode, you are billed based on how much time the instance is in use. If you expect to use an instance for a long period of time, change its billing mode to yearly/monthly to optimize costs. For details, see Changing the Billing Mode from Pay-per-Use to Yearly/Monthly.

   Table 2 Basic information

   Parameter	Description
   Region	Region where a tenant is located NOTICE: Select a region near to your service area to reduce network latency and experience faster access. Instances deployed in different regions cannot communicate with each other over a private network. After you buy an instance, you cannot change its region.
   DB Instance Name	The instance name: Can be the same as an existing instance name. Contains 4 to 64 characters and must start with a letter. It is case-sensitive and allows only letters, digits, hyphens (-), and underscores (_). If the name contains Chinese characters, the length cannot exceed 64 bytes. You can change the name of an instance after it is created. For details, see Modifying the Name of an Instance.
   Compatible API	Redis.
   DB Instance Type	Cluster. With a sharded cluster architecture, this type of instance supports connections through proxies and is compatible with Redis clusters. It offers strong horizontal expansion capability, supporting millions of QPS and dozens of TB-level services.
   Compatible Version	6.2 (including 6.2.X), 5.0, and earlier versions
   Data Copies	The default value is 3. Three copies of the data are created, and each copy always provides the same data as the other two to keep services available.
   AZ	Availability zone where the instance is created. An AZ is a part of a region with its own independent power supplies and networks. AZs are physically isolated but can communicate with each other over a private network.

   Figure 2 Specifications and storage
   

   Table 3 Specifications and storage

   Parameter	Description
   Node Specifications	Instance node specifications, node quantity, and storage space
   Nodes	Number of required nodes. After an instance is created, you can add nodes.
   Total Storage Space	The value is an integer, and the minimum value is 32 GB. You can add a minimum of 1 GB at a time.

   Table 4 Network

   Parameter	Description
   VPC	The virtual network where the instance is created. A VPC isolates networks for different services. You can select an existing VPC or create one. For details about how to create a VPC, see "Creating a VPC" in Virtual Private Cloud User Guide. If there are no VPCs available, the system allocates resources to you by default. NOTE: After a GeminiDB Redis instance is created, its VPC cannot be changed. If you want to connect to a GeminiDB Redis instance using an ECS over a private network, the GeminiDB Influx instance and the ECS must be in the same VPC. If they are not, you can create a VPC peering connection between them.
   Subnet	A subnet where your instance is created. The subnet provides dedicated and isolated networks, improving network security. NOTE: Create an IPv4 subnet or select an existing one. IPv6 subnets are not supported.
   Security Group	A security group controls access between GeminiDB Redis instances and other services. Ensure that the security group you selected allows your client to access the instance. If no security group is available, the system creates one for you.
   SSL	A security protocol. Secure Sockets Layer (SSL) certificates set up encrypted connections between clients and servers, preventing data from being tampered with or stolen during transmission. You can enable SSL to improve data security. After an instance is created, you can connect to it using SSL. NOTE: If SSL is not enabled when you create an instance, you can enable it after the instance is created. For details, see Configuring an SSL Connection.

   Table 5 Database configuration

   Parameter	Description
   Database Password	Password of the administrator account. The password: Must be 8 to 32 characters long. Can include two of the following: uppercase letters, lowercase letters, digits, and special characters: ~!@#%^*-_=+? For security reasons, set a strong password. The system will verify the password strength. Keep your password secure. The system cannot retrieve it if it is lost.
   Confirm Password	Enter the administrator password again.
   Enterprise Project	This parameter is provided for enterprise users. An enterprise project groups cloud resources, so you can manage resources and members by project. The default project is default. Select an enterprise project from the drop-down list. For more information about enterprise projects, see Enterprise Management User Guide.

   Table 6 Tags

   Parameter

   Description

   Tags

   This setting is optional. Adding tags helps you better identify and manage your instances. Each instance supports up to 20 tags by default. A tag consists of a tag key and a tag value. Tag key: mandatory if the instance is going to be tagged Each tag key is unique for each instance. It can include up to 36 characters, including digits, letters, underscores (_), and hyphens (-). Tag value: optional if the instance is going to be tagged The value can contain up to 43 characters, including digits, letters, underscores (_), periods (.), and hyphens (-). After an instance is created, you can view its tag details on the Tags tab. In addition, you can add, modify, and delete tags of an existing instance. For details, see Managing Tags.

   Table 7 Required duration

   Parameter	Description
   Required Duration	The length of your subscription if you select Yearly/Monthly billing. Subscription lengths range from one month to three years.
   Auto-renew	By default, this option is not selected. If you select this parameter, the auto-renew cycle is determined by the selected required duration.

5. On the displayed page, confirm instance details.
   • For yearly/monthly instances
     • To modify the configurations, click Previous.
     • If no modification is required, read and agree to the service agreement, click Pay Now, and complete the payment.
   • Pay-per-use
     • To modify the configurations, click Previous.
     • If no modification is required, read and agree to the service agreement and click Submit.

6. On the Instances page, view and manage the created instance.

   The instance creation process takes about 5 to 15 minutes. After the creation is complete, the status changes to Available.

   You can click in the upper right corner of the page to refresh the instance status.

   After a DB instance is created, the default database port is 8635 and cannot be changed.