Buying and Connecting to a Single-Node Instance

Step 1: Buying a Single-Node Instance

For details, see Buying a Single-Node GeminiDB Influx Instance.

1. Log in to the Huawei Cloud console.
2. In the service list, choose Databases > GeminiDB.
3. On the Instances page, click Buy DB Instance.
4. On the displayed page, select a billing mode, configure instance specifications, and click Next.

   The following parameters are for reference only. Select proper specifications as needed. Table 1 lists details about the parameters.

   Figure 1 Billing mode and basic information
   

   Parameter	Example Value	Description
   Billing Mode	Pay-per-use	Billing mode of an instance Yearly/Monthly: A prepaid billing mode in which you pay for resources before using it. Bills are settled based on the subscription period. The longer the subscription term, the bigger the discount. This mode is a good option for long-term stable services. Pay-per-use is a postpaid mode. You are billed based on how long you have actually used GeminiDB. Pay-per-use instance usage is calculated by the second and priced by the hour. This mode allows you to adjust resource usage easily. You neither need to prepare for resources in advance, nor end up with excessive or insufficient preset resources.
   Region	Select CN-Hong Kong.	The region where the tenant is located. It can be changed in the upper left corner. NOTE: To reduce network latency, select a region nearest from which you will access the instance. 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	User-defined	The instance name: Can be the same as an existing instance name. Can contain 4 to 64 characters and must start with a letter. It is case-sensitive and allows only letters, digits, hyphens (-), and underscores (_).
   Compatible API	InfluxDB	GeminiDB is compatible with mainstream NoSQL APIs, including Redis, DynamoDB, Cassandra, HBase, MongoDB, and InfluxDB. You can select GeminiDB APIs by following How Do I Select an API?
   Storage Type	Classic	Classic: classic architecture with decoupled storage and compute Cloud native: more flexible, new-gen version with support for more AZs NOTE: Cloud native storage is only available for cluster (performance-enhanced) instances. The way you use instances with classic or cloud native storage is similar. Cloud native storage supports more AZs. If both classic and cloud native are supported, you can select any of them.
   DB Instance Type	Single node	A single-node instance cannot ensure the SLA. You are advised to use it only for testing and function verification.
   DB Engine Version	1.8	1.8
   AZ	AZ 1, AZ 2, and AZ 3	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. A single-node instance can be deployed in one AZ.

   Figure 2 Specifications and storage
   

   Parameter	Example Value	Description
   Instance Specifications	2U8GB	Data nodes provide read and write capabilities for time series databases. The specifications depend on configurations of the DFV shared resource pool and memory. Select specifications based on service requirements. For details about supported specifications, see Instance Specifications.
   Nodes	1	A single-node instance can have only one node.
   Storage Space	100 GB	The minimum storage space is 100 GB and must be an integer. You can add at least 1 GB each time you scale up storage space.
   Purchase Cold Storage	No	Do not purchase cold storage. If you disable cold storage when creating an instance, you can enable it later based on service requirements. For details, see Enabling Cold Storage. NOTE: Cold storage cannot be disabled after being enabled.

   Figure 3 Network and database configurations
   

   Parameter	Example Value	Description
   VPC	default_vpc	Virtual private network where your instances are located. A VPC isolates networks for different services. You can select an existing VPC or create a VPC. NOTE: After a GeminiDB Influx instance is created, the VPC where the instance is deployed cannot be changed. To connect a GeminiDB Influx instance to an ECS over a private network, ensure they are in the same VPC. If they are not, create a VPC peering connection between them.
   Subnet	default_subnet	A subnet provides dedicated network resources that are logically isolated from other networks for security purposes.
   Security group	default	A security group controls access between GeminiDB Influx 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.
   Administrator Password	Configured based on the password policy	Password of the administrator account. The password: Can include 8 to 32 characters. Can include uppercase letters, lowercase letters, digits, and any of the following 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.
   Parameter Template	Default-InfluxDB-1.8	A template of parameters for creating an instance. The template contains API configuration values that are applied to one or more instances. After an instance is created, you can modify its parameters to better meet your service requirements. For details, see Modifying Parameters of GeminiDB Influx Instances.
   Enterprise Project	default	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.

   Retain the default values for other parameters.

5. On the displayed page, confirm instance details. To modify the configurations, click Previous.

   If you do not need to modify the settings, read and agree to the service agreement and click Submit.

6. Click Back to Instance Management to go to the instance list.
7. On the Instances page, view and manage the created instance.
   • Creating an instance takes about 5 to 9 minutes. During the process, the instance status displayed in the instance list is Creating.
   • After the instance is created, its status becomes Available.
     Figure 4 Available instance
     

Step 2: Connecting to an Instance Through DAS

1. Log in to the Huawei Cloud console.
2. In the service list, choose Databases > GeminiDB.
3. In the instance list, locate a target instance and click Log In in the Operation column.
   Figure 5 Connecting to a GeminiDB Influx Instance
   

   Alternatively, click the instance name to go to the Basic Information page. Click Log In in the upper right corner of the page.

   Figure 6 Connecting to a GeminiDB Influx Instance
   
4. Enter a password for logging in to the instance.
   Figure 7 Logging in to the GeminiDB Influx instance
   

   If you need to log in again after the password is reset, click Re-login in the upper right corner and use the new password.

   Figure 8 Re-login
   
5. Manage relevant databases.
   Figure 9 Instance homepage
   
   • Save commands to the execution record.

     This function is enabled by default to save the recently executed commands for your later query.

     Then you can click the Executed Commands tab on the lower page to view historical commands.

     

     Commands with passwords are not displayed on the Executed Commands tab page.

     Figure 10 Executed commands
     

     If this function is disabled, the commands executed subsequently are not displayed. You can click next to Save Executed SQL Statements in the upper right corner to disable this function.

   • Execute a command.

     Enter a command in the command window and click Execute or F8.

     Figure 11 Executing a command
     

     After a command is executed, you can view the execution result on the Results page.

   • Save a command.

     You can save a command to all instances or the current instance. Then you can view details in My Commands.

     

     Commands with passwords cannot be saved to My Commands.

     Figure 12 Saving a command
     
   • View my commands.

     Common commands are displayed the My Commands page.

     You can set a filter to narrow the scope of commands. If you select All, all commands saved in the current account are displayed.

     Figure 13 Filtering commands
     

     Alternatively, you can enter a command title or statement in the search box to search for the corresponding command.

     Figure 14 Searching for a command
     

     On the My Commands page, you can also create, edit, and delete a command or copy it to the command window.

     Figure 15 Managing a command
     
   • Clear a command.

     You can also press F10 to clear the command in the command window.

FAQs

Question: What should I do if the DAS console cannot be redirected after I click Log In in the Operation column in the instance list or click Log In on the Basic Information page?

Solution: Set your browser to allow pop-ups and try again.