Access an ECS-based self-managed database instance

Access methods

DAS can access other self-managed databases in the following methods:

• Direct access: No DAS gateway (DBGateway) is deployed. DAS actively accesses databases over the Internet. You can quickly access database instances after entering accounts and passwords. This method is suitable for scenarios where a few ECS instances are involved and you must specify security groups.
• Centralized-mode access: DAS gateways are deployed on at least one server (we recommend that you use two of more servers for disaster recovery scenarios) and database instances are automatically discovered. This method is suitable for rapid access to VPC-type ECS instances and classic network-type ECS instances are not recommended.
• Host-mode access: DAS gateways are deployed on every server and database instances are automatically discovered. In this method, all DAS features are available, such as full SQL analysis, SQL response time, and security auditing. For more information, see Features for three access methods.

Features for three access methods

The MySQL engine is used as an example.

Direct access

1. Log on to the Database Autonomy Service console.
2. In the Recommended Features section of the Overview page, click Access Instance.
3. Click ECS-based User-created Database.
4. Click Direct Access.
5. Select the security group in the Add DAS access rules column and then click Save.
6. Select the ECS instance and then click Next.
   Note You must select one or more private networks of security groups.
7. Configure the following parameters.

   Parameter	Description
   Select Engine	The type of the database. Valid values: MySQL, MongoDB, Redis, and PostgreSQL.
   Port	The port for the database.
   Database Account	The account used to log on to the database.
   Password	The password used to log on to the database.

   Note If the database has an existing account with required permissions, you can enter the account and password and then click Authorize. If the database does not have an existing account with required permissions, you can enter the database account and password and then click Generate Authorization Command. After you copy and run the authorization command on the database, click Authorize.
8. click Authorize. After you click Authorize, Accessed is displayed to indicate successful connection. The following common errors also may be displayed:
   • Unauthorized: No account or password is specified.
   • Connection Failed: indicates errors such as network failure or instance downtime.
   • Authentication Failed: indicates incorrect username or password.
   • Insufficient Permissions: The instance can be connected normally, but the permissions are insufficient. For more information, see Permissions.
9. Click Complete.

Centralized-mode access

1. Log on to the Database Autonomy Service console.
2. In the Recommended Features section of the Overview page, click Access Instance.
3. Click ECS-based User-created Database.
4. Click DBGateway in Centralized Mode.
5. Click New deployment DAS Gateway (dbgateway) and scanning instance.
   Note Note: If you have not deployed a DAS gateway in the corresponding VPC, click New deployment DAS Gateway (dbgateway) and scanning instance. If you have deployed a DAS gateway in the corresponding VPC, click Use existing DAS DBGateway to scan for new instances. The go directly to Step 8.
6. Select the Region and ECS and then click Generate Deployment Command.
7. Copy the deployment command. Log on to the ECS instance and run the command.
   Note If successful is returned in the command line window, the DAS gateway is deployed and will be automatically discovered by DAS. If Current Status is Normal, click Next. If the DAS gateway is not deployed, you can submit a ticket.
8. In the Discover Instance step, scan and discover the database instance.

   1. DAS can discover instances in the following ways:

      • Select Automatic Scan:
        1. Enter the scanned CIDR block in the Scanned Address field.
        2. Enter the port range in the Port Range field.
        3. Click Scan.
      • Select Enter Instances:
        1. Enter instances in the correct form in the Instances field.
        2. Click Scan.

           The DAS gateway will automatically scan and discover the database instance.

   2. Click Next.

9. Configure the following parameters.

   Parameter	Description
   Select Engine	The type of the database.
   Database Account	The account used to log on to the database.
   Password	The password used to log on to the database.
   IP Address	The IP address of the database.

   Note If the database has an existing account with required permissions, you can enter the account and password and then click Authorize. If the database does not have an existing account with required permissions, you can enter the database account and password and then click Generate Authorization Command. After you copy and run the authorization command on the database, click Authorize.
10. click Authorize.
    After you click Authorize, Accessed is displayed to indicate successful connection. The following common errors also may be displayed:

    • Unauthorized: No account or password is specified.
    • Connection Failed: indicates errors such as network failure or instance downtime.
    • Authentication Failed: indicates incorrect username or password.
    • Insufficient Permissions: The instance can be connected normally, but the permissions are insufficient. For more information, see Permissions.
11. Click Complete.

Host-mode access

1. Log on to the Database Autonomy Service console.
2. In the Recommended Features section of the Overview page, click Access Instance.
3. Click ECS-based User-created Database.
4. Click DBGateway in Centralized Mode.
5. Select the Region and ECS and then click Generate Deployment Command.
6. Copy the deployment command. Log on to the ECS instance and run the command.
   Note If successful is returned in the command line window, the DAS gateway is deployed. If the DAS gateway is not deployed, you can submit a ticket. If Current Status is Normal, click Next.
7. Configure the following parameters.

   Parameter	Description
   Select Engine	The type of the database.
   Database Account	The account used to log on to the database.
   Password	The password used to log on to the database.
   IP Address	The IP address of the database.

   Note If the database has an existing account with required permissions, you can enter the account and password and then click Authorize. If the database does not have an existing account with required permissions, you can enter the database account and password and then click Generate Authorization Command. After you copy and run the authorization command on the target database, click Authorize.
8. click Authorize. After you click Authorize, Accessed is displayed to indicate successful connection. The following common errors also may be displayed:
   • Unauthorized: No account or password is specified.
   • Connection Failed: indicates errors such as network failure or instance downtime.
   • Authentication Failed: indicates incorrect username or password.
   • Insufficient Permissions: The instance can be connected normally, but the permissions are insufficient. For more information, see Permissions.
9. Click Complete.