Help Center > > Getting Started> Getting Started with RDS for MySQL> Connecting to a MySQL DB Instance Through a Private Network> Step 1: Buy a DB Instance

Step 1: Buy a DB Instance

Updated at:Nov 20, 2020 GMT+08:00

Scenarios

This section describes how to buy a DB instance on the management console.

Currently, RDS for MySQL supports the yearly/monthly and pay-per-use billing modes. The DB instance class and storage space you need depend on your processing power and memory requirements.

You can create read replicas in batches when you are buying single or primary/standby DB instances.

Prerequisites

  • You have registered a HUAWEI CLOUD account.

Procedure

  1. Log in to the management console.
  2. Click in the upper left corner and select a region and a project.
  3. Click Service List. Under Database, click Relational Database Service. The RDS console is displayed.
  4. On the Instance Management page, click Buy DB Instance.
  5. On the displayed page, select a billing mode, configure information about your DB instance. Then, click Next.

    RDS provides the following billing modes:

    Yearly/Monthly

    If you select this billing mode, skip 6 and go to 7.

    Pay-per-use

    If you select this billing mode, go to 6.
    Table 1 Basic information

    Parameter

    Description

    Region

    A region where the tenant is located. You can change it on the creation page, or go back to the Instance Management page and change it in the upper left corner.

    NOTE:

    Products in different regions cannot communicate with each other through a private network. After a DB instance is purchased, the region cannot be changed. Therefore, exercise caution when selecting a region.

    DB Instance Name

    Must start with a letter and consist of 4 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.

    • If you intend to create multiple DB instances and read replicas, the length of each DB name will change.
    • If you create multiple DB instances at a time, they will be named with four digits appended to the DB instance name. For example, if you enter instance, the first instance will be named as instance-0001, the second as instance-0002, and so on.

    DB Engine

    Set to MySQL.

    DB Engine Version

    For details, see DB Engines and Versions.

    Different DB engine versions are supported in different regions.

    If you use a MySQL database, select a proper DB engine version based on service requirements. You are advised to select the latest available version because it is more stable, reliable, and secure.

    DB Instance Type

    • Primary/Standby: uses the HA architecture with a primary DB instance and a synchronous standby DB instance. It is suitable for production databases of large- and medium-sized enterprises in Internet, Internet of Things (IoT), retail e-commerce sales, logistics, gaming, and other sectors. The standby DB instance improves instance reliability and is invisible to you after being created.

      An AZ is a physical region where resources use independent power supply and networks. AZs are physically isolated but interconnected through an internal network. Some regions support both single AZs and multiple AZs and some only support single AZs.

      To achieve higher reliability, RDS will automatically deploy your primary and standby instances in different physical servers even if you deploy primary and standby DB instances in the same AZ. If you attempt to create primary/standby DB instances in the same AZ in a Dedicated Computing Cluster (DCC) and there is only one physical server available, the creation will fail.

      RDS allows you to deploy primary and standby DB instances in an AZ or across AZs. You can determine whether the standby AZ is the same as the primary AZ.

      • If they are the same (default setting), the primary and standby DB instances are deployed in the same AZ.
      • If they are different, the primary and standby DB instances are deployed in different AZs to ensure failover support and high availability.
    • Single: uses the single-node architecture, which is more cost-effective than mainstream primary/standby DB instances. It is suitable for developing and testing of microsites, and small- and medium-sized enterprises, or for learning about RDS.

    Storage Type

    Determines the DB instance read/write speed. The higher the maximum throughput is, the higher the DB instance read/write speed can be.

    • Ultra-high I/O: supports a maximum throughput of 350 MB/s.
    • Ultra-high I/O (advanced): considers both the local disk write speed and cloud disk data reliability.
    NOTE:
    • Ultra-high performance (advanced) DB instances support the ultra-high I/O (advanced) storage type only.
    • If you select DSS for Resource Type, only the storage type that you have selected when you buy the DSS service is displayed.

    Time Zone

    You need to select a time zone for your DB instance according to the longitude and latitude of the region hosting your DB instance. You can select a time zone during the DB instance creation and you can change it after the instance is created.

    Table 2 Instance specifications

    Parameter

    Description

    Instance Class

    Refers to the CPU and memory of a DB instance. Different instance classes refer to different numbers of database connections and maximum IOPS.

    For details about instance classes, see DB Instance Classes.

    After a DB instance is created, you can change its CPU and memory. For details, see Changing a DB Instance Class.

    NOTE:

    DB instances in a DCC only support the general-enhanced instance class.

    Resource Type

    • EVS
    • DSS
      NOTE:

      This option is displayed only when you buy the Dedicated Distributed Storage Service (DSS) service.

    Storage Pool

    Displayed only when you select DSS for Resource Type. The storage pool is physically isolated from other pools and is secure.

    Storage Space (GB)

    Contains the system overhead required for inode, reserved block, and database operation. Storage space can range in size from 40 GB to 4,000 GB and can be scaled up only by a multiple of 10 GB. MySQL supports storage space from 11 GB to 10,000 GB for some users. If you want to create a DB instance with storage space up to 10,000 GB or scale it up to 10,000 GB, contact customer service to apply for the permission.

    After a DB instance is created, you can scale up its storage space. For details, see Scaling Up Storage Space.

    Disk Encryption

    • Disabled: indicates the encryption function is disabled.
    • Enabled: indicates the encryption function is enabled, improving data security but affecting system performance.

      Key Name: indicates the tenant key. You can create or select a key.

      NOTE:
      • Once the DB instance is created, you cannot modify the disk encryption status or change the key. The backup data stored in OBS will not be encrypted.
      • After an RDS DB instance is created, do not disable or delete the key that is being used. Otherwise, RDS will be unavailable and data cannot be restored.
      • For details about how to create a key, see the "Creating a CMK" section in the Data Encryption Workshop User Guide.
    Table 3 Network

    Parameter

    Description

    VPC

    A dedicated virtual network in which your RDS DB instances are located. A VPC can isolate networks for different services. You can select an existing VPC or create a VPC. For details on how to create a VPC, see the "Creating a VPC" section in the Virtual Private Cloud User Guide.

    If no VPC is available, RDS allocates a VPC for you by default.

    NOTICE:

    After the DB instance is created, the VPC cannot be changed.

    Subnet

    Improves network security by providing dedicated network resources that are logically isolated from other networks. Subnets take effect only within an AZ. The Dynamic Host Configuration Protocol (DHCP) function is enabled by default for subnets in which you plan to create RDS DB instances and cannot be disabled.

    A floating IP address is automatically assigned when you create a DB instance. You can also enter an unused floating IP address in the subnet CIDR block. After the DB instance is created, you can change the floating IP address.

    Security Group

    Enhances security by controlling access to RDS from other services. You need to add rules to a security group that enable you to connect to your DB instance.

    If no security group is available or has been created, RDS allocates a security group to you by default.

    Table 4 Database configuration

    Parameter

    Description

    Password

    • Configure (default value): Configure the password when you are creating the DB instance.
    • Skip: The system does not set an initial password for you.
      NOTICE:

      To log in, you will have to reset a password for the DB instance.

      After a DB instance is created, you can reset the password. For details, see Resetting the Administrator Password.

    Administrator

    The default login name for the database is root.

    Administrator Password

    Must consist of 8 to 32 characters and contain at least three of the following: uppercase letters, lowercase letters, digits, and special characters (~!@#%^*-_+?,). Enter a strong password and periodically change it to improve security, preventing security risks such as brute force cracking.

    Keep this password secure. The system cannot retrieve it.

    After a DB instance is created, you can reset this password. For details, see Resetting the Administrator Password.

    Confirm Password

    Must be the same as Administrator Password.

    Parameter Template

    Contains engine configuration values that can be applied to one or more DB instances. If you intend to create primary/standby DB instances, they use the same parameter template. You can modify the instance parameters as required after the DB instance is created.

    NOTICE:

    If you use a custom parameter template when creating a DB instance, the following specification-related parameters in the custom template are not delivered. Instead, the default values are used.

    • back_log
    • innodb_io_capacity_max
    • max_connections
    • innodb_io_capacity
    • innodb_buffer_pool_size
    • innodb_buffer_pool_instances

    You can modify the instance parameters as required after the DB instance is created. For details, see section Modifying Parameters in a Parameter Template.

    Certificate

    (Optional) Specifies the certificate created by Cloud Certificate Manager (CCM). The default certificate is the system certificate that is automatically generated. You can also select another certificate from the drop-down list.

    NOTICE:

    If you want to specify a certificate when creating a DB instance, you need to contact customer service to apply for the permission.

    Enterprise Project

    If the DB instance has been associated with an enterprise project, select the target project from the Enterprise Project drop-down list.

    You can also go to the ProjectMan console to create a project. For details about how to create a project, see the ProjectMan User Guide.

    Table 5 Tags

    Parameter

    Description

    Tag

    Tags an RDS DB instance. This configuration is optional. Adding tags to RDS DB instances helps you better identify and manage the DB instances. A maximum of 10 tags can be added for each DB instance.

    After a DB instance is created, you can view its tag details on the Tags page. For detailed operations, see Managing Tags.

    Table 6 Purchase period

    Parameter

    Description

    Required Duration

    This option is available only for yearly/monthly DB instances. The system will automatically calculate the configuration fee based on the selected required duration. The longer the required duration is, the larger discount you will enjoy.

    Auto-renew

    • This option is available only for yearly/monthly DB instances and is not selected by default.
    • If you select this option, the auto-renew cycle is determined by the selected required duration.

    Quantity

    RDS supports batch creation of DB instances. If you intend to create primary/standby DB instances and set Quantity to 1, a primary DB instance and a synchronous standby DB instance will be created.

    Table 7 Read replicas

    Parameter

    Description

    Read Replica

    By default, read replicas are named with "read" and two digits appended to the primary DB instance name. For example, if the primary instance name is instance-0001, the first read replica will be named as instance-0001-read-01.

    The network and storage configurations are the same as those of the primary DB instance.

    Read Replica AZ

    By default, the primary DB instance and read replicas are deployed in different AZs. You can choose AZs as required.

    NOTICE:

    Products in different regions cannot communicate with each other through a private network and you cannot change the region of a DB instance after creating the instance. Therefore, exercise caution when selecting a region.

    Instance Class

    Refers to the CPU and memory of a DB instance.

    Read Replica Quantity

    You can choose to create read replicas when you are creating a primary DB instance. After the primary DB instance is created, the system automatically triggers the creation of read replicas. You can create a maximum of five read replicas for each primary DB instance.

    If you intend to create primary/standby DB instances and set Read Replica Quantity to 1, the primary/standby DB instances and a read replica will be created.

    If you have any questions about the price, click Pricing details at the bottom of the page.

    The performance of your DB instance depends on its configurations. Hardware configuration items include the instance specifications, storage type, and storage space.

  6. Confirm the specifications for pay-per-use DB instances.

    • If you need to modify your settings, click Previous.
    • If you do not need to modify your settings, click Submit.

    Skip 7 and 8 and go to 9.

  7. Confirm the order for yearly/monthly DB instances.

    • If you need to modify your settings, click Previous.
    • If you do not need to modify your settings, click Pay Now.

  8. Select a payment method and complete the payment.

    This operation applies only to the yearly/monthly billing mode.

  9. To view and manage the DB instance, go to the Instance Management page.

    • During the creation process, the DB instance status is Creating. You can view the detailed progress and result of the task on the Task Center page. To refresh the DB instance list, click in the upper right corner of the list. When the creation process is complete, the instance status will change to Available.
    • The automated backup policy is enabled by default. After the DB instance is created, you can modify the automated backup policy. An automated full backup is immediately triggered after a DB instance is created.
    • After a DB instance is created, you can enter a description for it.
    • The default database port is 3306. After a DB instance is created, you can change its port.

      You are advised to change the database port in a timely manner.

      For details, see Changing the Database Port.

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