Relational Database ServiceRelational Database Service

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Updated at: Apr 02, 2022 GMT+08:00

Using MySQL CLI to Connect to an Instance Through a Private Network

You can connect to an instance through a non-SSL connection or an SSL connection using the MySQL client. The SSL connection encrypts data and is more secure.

Prerequisites

  1. You have logged in to an ECS.
    • For details on how to create and log in to an ECS, see Purchasing an ECS and Logging In to an ECS.
    • To connect to an RDS instance through an ECS, make sure that:
      • The ECS and DB instance must be in the same VPC.
      • The ECS must be allowed by the security group to access the DB instance.
        • If the security group with which the DB instance is associated is the default security group, you do not need to configure security group rules.
        • If the security group with which the DB instance is associated is not the default security group, check whether the security group rules allow the ECS to connect to the DB instance. For details, see Configuring Security Group Rules.

          If the security group rules allow the access from the ECS, the ECS can connect to the DB instance.

          If the security group rules do not allow the access from the ECS, you need to add a security group rule. The ECS must be allowed by the security group to access the DB instance.

  2. You have installed a database client to connect to DB instances.

    In the Linux OS, install the MySQL client on the device that can access RDS. It is recommended that you download a MySQL client running a version later than that of the DB instance.

    For details, see Installing the MySQL Client.

SSL Connection

  1. Log in to the management console.
  2. Click in the upper left corner and select a region and a project.
  3. Click in the upper left corner of the page and choose Database > Relational Database Service. The RDS console is displayed.
  4. On the Instance Management page, click the instance name to go to the Basic Information page.
  5. In the DB Information area, check whether SSL is enabled.

    • If yes, go to 6.
    • If no, click . In the displayed dialog box, click Yes. Then go to 6.

  6. Click next to SSL to download the root certificate or certificate bundle.
  7. Import the root certificate to the Linux OS on the ECS. For details, see How Can I Import the Root Certificate to a Windows or Linux OS?

    • Since April 2017, RDS has offered a new root certificate that has a 20-year validation period. The new certificate takes effect after DB instances are rebooted. Replace the old certificate before it expires to improve system security.

      For details, see How Can I Identify the Validity Period of an SSL Root Certificate?

    • You can also download the certificate bundle, which contains both the new certificate provided since April 2017 and the old certificate.

  8. Connect to the RDS DB instance. The Linux OS is used as an example.

    mysql -h <host>-P <port>-u <userName>-p--ssl-ca=<caDIR>

    Table 1 Parameter description

    Parameter

    Description

    <host>

    Floating IP address. To obtain this parameter value, go to the Basic Information page of the DB instance and view the floating IP address in the Connection Information area.

    <port>

    Database port. By default, the value is 3306. To obtain this parameter value, go to the Basic Information page of the DB instance and view the database port in the Connection Information area.

    <userName>

    Username of the RDS database account. The default administrator is root.

    <caDIR>

    Directory of the CA certificate. The certificate should be stored in the directory where the command is executed.

    For example, to connect to a DB instance through an SSL connection as user root, run the following command:

    mysql -h 172.16.0.31 -P 3306 -u root -p --ssl-ca=ca.pem

    Enter the password of the database account if the following information is prompted:

    Enter password:

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