Can an External Server Access the DDS DB Instance?

You can access the DDS DB instance using the following methods:

If a DDS DB instance and an ECS are created in the same VPC, you can access the DDS DB instance through the ECS.
If the DDS DB instance is publicly accessible, you can access the DB instance over public networks.

Case 1

Symptom: Failed to access a DDS DB instance through the ECS in the container that is created using Cloud Container Engine (CCE).
Possible cause: The DB instance and ECS are in different VPCs and the VPC peering connection is not established between the two VPCs.
Solution: Add the CIDR block of the VPC where the container resides to DDS. Establish a VPC peering connection between two VPCs. For more information about VPC peering connections, see VPC Peering Connection Creation Procedure.

Case 2

Symptom: A user can log in to a DDS DB instance through a client but fails to access the DB instance through a VPN.
Possible cause: No VPC peering connection is configured, and the address mapping is incorrect. As a result, the connection fails.
Solution: Configure a VPC peering connection to enable local access to the DDS DB instance through a VPN.

Parent topic: Database Connection

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