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Access the Redis Instance from a Redis-cli client

After you create an ECS instance and a whitelist entry, install a Redis-cli client on the ECS instance and access the Redis instance from the Redis-cli client. Redis-cli is the built-in client of Redis. To use Redis-cli, first install Redis. Prerequisites <ol> <li>You have successfully created a Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/Getting_Started.Create_Redis" target="_blank">Create a Redis Instance</a>. Make sure the instance is in running status.</li> <li>You have successfully created an ECS instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/Getting_Started.Create_ECS" target="_blank">Create an ECS Instance</a>. Make sure the instance is in running status.</li> <li>You have successfully created a whitelist entry. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/Getting_Started.Create_Whitelist" target="_blank">Create a Whitelist Entry</a>.</li> </ol> Usage Guidelines This article uses a Linux-CentOS ECS instance as an example. Procedures 1.   Log in to the ECS instance.       a.   Log in to the <a href="https://pinganyun.com/console/ecs/overview" target="_blank">ECS Console</a>.       b.   In the left navigation pane, click Instance to enter the Instance Management page.       c.    In the Operations column for the target instance, click ECS Console.       d.    Enter the username and password. 2.  Install Redis. Method 1:       a.   If the operating system of your ECS instance does not include a gcc environment, execute the following command to install gcc: <pre> <code>yum install gcc</code></pre>       b.  Execute the following command to download the Redis installation package (The download address is <a href="https://redis.io/download" target="_blank">download address</a>): <pre> <code>wget http://download.redis.io/releases/redis-5.0.4.tar.gz</code></pre> <img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201507111747-1fa09efe9276.png" style="height:20px; margin:0px; width:80px" />: Choose the Redis version according to your business needs. This article uses Redis 5.0.4 as an example.      c.   Execute the following command to decompress the Redis installation package: <pre> <code>tar -xzf redis-5.0.4.tar.gz</code></pre>      d.   Execute the following command to enter the Redis directory and compile Redis: <pre> <code>cd redis-5.0.4 make</code></pre> Result The system prompts that the compilation succeeds. Method 2:       a.  If your ECS operating system does not include a gcc environment, execute the following command to install gcc: <pre> <code>yum install gcc</code></pre>       b.  Execute the following command to install Redis: <pre> <code>yum install redis systemctl start redis systemctl enable redis</code></pre> <img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201507111932-1436bc5690a3.png" style="height:39px; width:830px" />Result Execute the following command to verify the connectivity between the Redis-cli and Redis-server: <pre> <code>redis-cli ping</code></pre> <img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201507112025-1e7685199b42.png" style="height:43px; width:485px" /> 3.   Use the Redis-cli client to access the Redis instance. Method 1:       a.   Execute the following command to enter the src directory: <pre> <code>cd src</code></pre>       b.  Execute the following command to connect to the Redis instance from the Redis-cli client: <pre> <code>./redis-cli -c -h Domain-Name -p Port -a Password</code></pre> <img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201507111747-1fa09efe9276.png" style="height:20px; margin:0px; width:80px" />: <ul> <li>Domain-Name: Access domain name of the Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/User_Guide.Instance_Management.View_Instance" target="_blank">View Basic Information about an Instance</a>.</li> <li>Port: Port number of the Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/User_Guide.Instance_Management.View_Instance" target="_blank">View Basic Information about an Instance</a>.</li> <li>Password: Password of the Redis instance that has been set when you create the Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/User_Guide.Instance_Management.View_Instance" target="_blank">View Basic Information about an Instance</a>.</li> </ul> Method 2: Execute the following command to connect to the Redis instance from the Redis-cli client: <pre> <code>redis-cli -h Domain-Name -p Port -a Password</code></pre> <img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201507111747-1fa09efe9276.png" style="height:20px; margin:0px; width:80px" />: <ul> <li>Execute the following command to connect to a cluster instance:</li> </ul> <pre> <code>redis-cli -c -h Domain-Name -p Port -a Password</code></pre> <ul> <li>Descriptions of parameters are as follows:</li> </ul>            Domain-Name: Access domain name of the Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/User_Guide.Instance_Management.View_Instance" target="_blank">View Basic Information about an Instance</a>.            Port: Port number of the Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/User_Guide.Instance_Management.View_Instance" target="_blank">View Basic Information about an Instance</a>.            Password: Password of the Redis instance that has been set when you create the Redis instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/Redis/User_Guide.Instance_Management.View_Instance" target="_blank">View Basic Information about an Instance</a>. 4.  Execute the following command to write data to the Redis instance: <pre> <code>set foo bar</code></pre> Result Execute the following command to view the newly written data in the Redis instance: <pre> <code>get foo</code></pre> <img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201507112556-12f2871a9bcf.png" style="height:110px; width:604px" />

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