What Can I Do If the Connection Test Failed?

Log in to the management console.
Click in the upper left corner and select a region and a project.
Click Service List. Under Database, click Relational Database Service. The RDS console is displayed.
On the Instance Management page, click the target DB instance. In the Connection Information area on the Basic Information page, view the VPC where the RDS DB instance is located.
Check whether the RDS DB instance to which distributed transactions are added is in the same VPC as ECS.
- If they are in the same VPC, see What Do I Do If Two ECSs in the Same VPC Cannot Communicate with Each Other or Packet Loss Occurs During the Communication Between the Two ECSs?
- If they are in different VPCs:
  - Public access: Bind an EIP to the DB instance by referring to Binding and Unbinding an EIP.
  - Private access: Create a VPC peering connection by referring to VPC Peering Connection Overview to establish a network connection between two VPCs.
  - Change the VPC hosting the ECS to the same as that hosting the RDS by referring to Changing a VPC.

Parent topic: Database Connection

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