Connecting to an Instance Using a Private Domain Name

Precautions

• The instances must be in the same VPC and subnet as the ECS.
• The ECS must be in a security group that has access to the instances.

  Scenario 1: If the instance is associated with the default security group, you do not need to configure security group rules.

  Scenario 2: If the instance is not associated with the default security group, check whether the security group rules allow the ECS to connect to the instance.

  • If yes, the ECS can connect to the instance.
  • If no, add an inbound rule to the security group.

    For details about how to configure a security group, see Configuring Security Group Rules.

Prerequisites

• An ECS has been created. The following uses a Linux ECS as an example. For details, see Purchasing an ECS in Getting Started with Elastic Cloud Server.
• Download the Redis client installation package.

Procedure

1. Configure the private domain name for the GeminiDB Redis instance. For details, see Configuring a Private Domain Name.
2. Log in to the ECS. For details, see Logging In to an ECS in Getting Started with Elastic Cloud Server.
3. Obtain the Redis client.

   Method 1

   Run the following command to download the Redis client.

   wget http://download.redis.io/releases/redis-6.2.0.tar.gz

   Method 2

   Download the Redis client from the address provided in Prerequisites and upload the Redis client installation package to the ECS.

4. Decompress the client tool package.

   tar -xzf redis-6.2.0.tar.gz

5. Connect to the DB instance in the src directory.

   cd redis-6.2.0

   make

   cd src

   ./redis-cli -h <DB_Domain_Name> -p <DB_PORT> -a <DB_PWD>

   Example:

   ./redis-cli -h redis.com -p 8635 -a <DB_PWD>

   Table 1 Parameter description

   Parameter	Description
   <DB_Domain_Name>	The private domain name of the DB instance to be connected. The private domain name is the one created in 1.
   <DB_PORT>	Port for accessing the target instance. Configure this parameter based on service requirements. To obtain the instance port number, perform the following steps: Click the target instance to go to the Basic Information page. In the Network Information area, you can find the database port.
   <DB_PWD>	Specifies the administrator password set when you buy a GeminiDB Redis instance.

6. Check the results. If the following information is displayed, the connection is successful.

   Domain_Name:port>