Buying a DB Instance and Connecting to It Using the mysql Client

Operation Process

Preparations

1. Sign up for a HUAWEI ID and enable Huawei Cloud services.
2. Before purchasing DB instances, ensure that your account balance is sufficient. Top up your account if required.
3. For fine-grained permissions management on Huawei Cloud resources, use Identity and Access Management (IAM) to create a user or user group and grant it specific operation permissions. For details, see Creating a User and Granting Permissions.

Step 1: Buy an RDS for MySQL DB Instance

1. Go to the Buy DB Instance page.
2. On the Quick Config page, set basic parameters.
   

   Only mandatory parameters are provided on the Quick Config page. If the available parameters do not match your workloads, try Custom Config.

   The following parameter settings are only for reference.

   Figure 1 Basic Settings
   

   Parameter	Example Value	Description
   Billing Mode	Pay-per-use	The 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, the bigger the discount. This mode is a good option for long-term, stable services. Pay-per-use: A postpaid billing mode. You pay as you go and just pay for what you use. The DB instance usage is calculated by the second but billed every 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	CN-Hong Kong	The region where your resources are located. NOTE: Products in different regions cannot communicate with each other through a private network. After a DB instance is created, the region cannot be changed. Therefore, exercise caution when selecting a region.
   DB Engine Version	8.0	The database version.
   DB Instance Type	Primary/Standby	The architecture type of an instance. Primary/Standby: An HA architecture. In a primary/standby pair, each instance has the same instance class. When a primary instance is being created, a standby instance is provisioned along with it to provide data redundancy. The standby instance is invisible to you after being created.
   Instance Class	General-purpose | 2U | 4G	The vCPU and memory of an instance.
   Storage	Cloud SSD | 100GB	The storage space of an instance. It contains the system overhead required for inodes, reserved blocks, and database operation.
   Disk Encryption	Disable	Enabling disk encryption improves data security, but slightly affects the read and write performance of the database. If a shared KMS key is used, the corresponding CTS events are createdatakey and decrydatakey. Only the key owner can receive the events.

3. Complete advanced configurations.
   Figure 2 Additional Options
   

   Parameter	Example Value	Description
   VPC	vpc-default	The virtual network in which your instance is located. A VPC can isolate networks for different workloads. If no VPC is available, click Create VPC. After a VPC is created, click . For details, see Creating a VPC and Subnet.
   Subnet	subnet-default	A subnet provides dedicated network resources that are logically isolated from other networks for network security.
   Security Group	default	It can enhance security by controlling access to RDS for MySQL from other services.
   Enterprise Project	default	If your account has been associated with an enterprise project, select the target project from the Enterprise Project drop-down list. For more information about enterprise projects, see Enterprise Management User Guide.
   Table Name	Case insensitive	Whether table names are case sensitive. Restoration may fail if the case sensitivity settings of table names on the source and target instances are different. The case sensitivity of table names for created RDS for MySQL 8.0 instances cannot be changed.
   Quantity	1	The number of instances to be created in a batch.

4. Click Buy.
5. Check the purchased DB instance.
   Figure 3 Instance successfully purchased
   

Step 2: Buy an ECS

1. Go to the Elastic Cloud Server console.
2. Check whether there is a Linux ECS.
   • If yes, go to 3.
   • If no, purchase an ECS and select Linux (for example, CentOS) as its OS.

     To download the mysql client to the ECS, bind an EIP to the ECS. The ECS must be in the same region, VPC, and security group as the RDS for MySQL DB instance for mutual communications.

     For details about how to purchase a Linux ECS, see Purchasing a Custom ECS in Elastic Cloud Server User Guide.

   • If there is only a Windows ECS, you can use MySQL-Front to connect to the DB instance. For details, see Buying a DB Instance and Connecting to It Using MySQL-Front.
   Figure 4 ECS
   
3. Check whether the ECS and RDS for MySQL instance are in the same region and VPC.
   Figure 5 Overview
   
   • If they are not in the same region, purchase another ECS. The ECS and DB instance in different regions cannot communicate with each other. To reduce network latency, deploy your DB instance in the region nearest to your workloads.
   • If the ECS and DB instance are in different VPCs, change the VPC of the ECS to that of the DB instance. For details, see Changing a VPC.

Step 3: Test Connectivity and Install the mysql Client

1. Log in to the ECS. For details, see Login Using VNC in the Elastic Cloud Server User Guide.
2. On the Instances page of the RDS console, click the DB instance name.
3. Choose Connectivity & Security from the navigation pane. In the Connection Information area, obtain the floating IP address and database port of the DB instance.
   Figure 6 Connection information
   

4. On the ECS, check whether the floating IP address and database port of the DB instance can be connected.

   telnet 192.168.6.144 3306

   • If yes, network connectivity is normal.
   • If no, check the security group rules.
     • Check the outbound rules of the ECS security group. By default, all outgoing network traffic is allowed.
       If not all outgoing traffic is allowed, add an outbound rule for the floating IP address and port of the DB instance.

       Figure 7 ECS security group
       
     • If in the security group of the DB instance, there is no inbound rule allowing the access from the private IP address and port of the ECS, add an inbound rule for the private IP address and port of the ECS. For details, see Configuring a Security Group Rule.
5. Download the mysql client installation package for Linux to the ECS. The package mysql-community-client-8.0.28-1.el6.x86_64.rpm is used as an example.

   wget https://dev.mysql.com/get/mysql-community-client-8.0.28-1.el6.x86_64.rpm

   

   A mysql client running a version later than that of the DB instance is recommended.

6. Install the mysql client.

   rpm -ivh --nodeps mysql-community-client-8.0.28-1.el6.x86_64.rpm

   

   • If any conflicts occur during the installation, add the replacefiles parameter to the command and install the client again.

     rpm -ivh --replacefiles mysql-community-client-8.0.28-1.el6.x86_64.rpm

   • If a message is displayed prompting you to install a dependent package during the installation, add the nodeps parameter to the command and install the client again.

     rpm -ivh --nodeps mysql-community-client-8.0.28-1.el6.x86_64.rpm

Step 4: Connect to the DB Instance Using Commands (Non-SSL Connection)

1. Run the following command on the ECS to connect to the DB instance:

   mysql -h <host> -P <port> -u <userName> -p

   Example:

   mysql -h 192.168.6.144 -P 3306 -u root -p

   Table 1 Parameter description

   Parameter	Description
   <host>	Floating IP address obtained in 3.
   <port>	Database port obtained in 3. The default value is 3306.
   <userName>	Administrator account root.

2. Enter the password of the database account if the following information is displayed:

   Enter password:

   Figure 8 Connection successful
   

FAQ

What Should I Do If I Can't Connect to My RDS DB Instance?

Follow-up Operations

After logging in to the DB instance, you can create or migrate databases.

• Creating a MySQL Database Using the Console
• Creating a MySQL Database Using an API
• Managing MySQL Databases Using DAS
• Migrating Data to RDS for MySQL