Introduction to Connection Scenarios

DCS Redis supports access to Redis instances through private networks (VPC) by default. If you need to connect to the instance on a local device or other devices via the Internet, you can apply for an Internet connection address of the Redis instance and access the Redis instance through the Internet.

l CT-ECS instance (in the same VPC as the Redis instance): It is recommended to connect to the Redis instance through a private network. When connecting, you need to connect to the private network connection address of the Redis instance to obtain higher security and lower network latency.

l Local devices and cross-regional ECS instances of the Redis instance (in different VPCs from the Redis instance): You can connect to the Redis instance through the Internet. When connecting, you need to connect to the Internet connection address of the Redis instance, or the connection can fail. Prerequisite: You need to activate an EIP and bind the EIP to the Redis instance.

Before You Begin

l A DCS Redis instance has been created and is in the Running state.

l An ECS has been created and is in the same VPC as the Redis instance.

l If the ECS runs the Linux OS, ensure that the GCC compilation environment has been installed on the ECS.

l If you have configured an IP trustlist for the Redis instance, add the IP address of the ECS to the trustlist to ensure network connectivity between the ECS and the Redis instance.

The account password is set for the Redis instance for logging in to the Redis instance. You can access the Redis instance through the Redis instance default account, new account, etc.

Procedure (Linux)

This example describes how to access a Redis instance through redis-cli on a CT-ECS instance (Linux) that is in the same VPC as the Redis instance.

1）Execute the following command to download the Redis source code file:

wget https://download.redis.io/releases/redis-5.0.5.tar.gz

Note: This document uses redis-5.0.5 as an example to demonstrate the operation process. You can also install other versions. For detailed operations, see official Redis website download center.

2）Execute the following command to decompress the Redis source code file:

tar xzf redis-5.0.5.tar.gz

3）Execute the following command to enter the decompressed directory to compile and install the Redis source code file. Compilation and installation will take a while (usually 2 to 3 minutes).

cd redis-5.0.5&&make

Note: Need the GCC compilation environment.

You can see the instance's connection information on the instance details page. Please see Viewing the Connection Address.

Execute the following command in the command line window to connect to the Redis instance:

cd src
./redis-cli -h ip -p port

Table 1: Parameter Description

Parameter	Description	Method of Obtaining
ip	Connection address of the Redis instance	l Connecting through a private network: You need to obtain the private network connection address of the Redis instance.l Connecting through the Internet: You need to obtain the EIP connection address of the Redis instance.For specific operations, seeViewing Connection Address (Connection Guide - Viewing Connection Address OSDO).
port	Port number of the Redis instance	Port Number
-c	Enable cluster mode	This mode is only available when the Redis instance isa native cluster architecture (Product Introduction - Product Architecture - 2.3.6) and is directly connected.

Connection example: Default address (suitable for scenarios where you connect through a default address, such as the connection address of a standard architecture instance or the proxy address of a cluster architecture instance):

./redis-cli -h 198.20.7.91 -p 33016

Native cluster architecture direct-connect address (suitable for scenarios where the native cluster architecture is connected through a direct-connect address):

redis-cli -h 198.20.7.91 -p 30101 -c

Execute the following command to complete password verification:

For the cluster version: instance name#instance password.
For the standard version: instance password.

AUTH password

Table 2: Parameter Description

Parameter	Description
password	l Fill in the account number and password: use the default account (account named after the instance name): For cluster version: instance name#instance password; For standard version: instance password.l For example, the instance name is DCS Redis2-9r0qom, and the custom password is Password21; then the password verification command for the cluster version is AUTH DCS2-9r0qom#Password21, and for the standard version is AUTH Password21.l Use the newly created account: The password format is user#password . For instance, the custom account is testaccount, the password is Rp829dlwa, and then the password verification command is AUTH testaccount#Rp829dlwa.

Parameter

Description

password

l Fill in the account number and password: use the default account (account named after the instance name): For cluster version: instance name#instance password; For standard version: instance password.l For example, the instance name is DCS Redis2-9r0qom, and the custom password is Password21; then the password verification command for the cluster version is AUTH DCS2-9r0qom#Password21, and for the standard version is AUTH Password21.l Use the newly created account: The password format is *user#password* . For instance, the custom account is testaccount, the password is Rp829dlwa, and then the password verification command is AUTH testaccount#Rp829dlwa.

DCS Redis Help Documentation

Connecting to the Instance