Connecting to an Instance Using an EIP

You can connect to a GeminiDB Redis instance from an ECS or a local device over a public network.

This section uses the Linux OS as an example to describe how to connect to a GeminiDB Redis instance using the Redis-cli client. You can access a GeminiDB Redis through binding an elastic load balancer to an EIP to avoid single points of failure (SPOFs) and achieve load balancing in the production environment.

You can connect to a DB instance through an unencrypted connection or an encrypted connection (SSL). The SSL connection encrypts data and is more secure. For details, see Connecting to a instance Using SSL. This section describes how to access a GeminiDB Redis instance in non-SSL mode.

Precautions

To connect to a DB instance through an unencrypted connection, the SSL connection must be disabled. For details about how to disable SSL, see Configuring an SSL Connection.
You need to estimate the bandwidth required by services and purchase an EIP with sufficient bandwidth resources. Client access exceptions caused by poor public network performance will not be included in the SLA.

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.
Bind an EIP to the instance node and configure security group rules. For details, see Binding and Unbinding an EIP and Configuring Security Group Rules.

A GeminiDB Redis instance has multiple nodes. Select any node and bind an EIP to it.

Non-SSL ConnectionProcedure

Log in to the ECS. For details, see Logging In to an ECS in Getting Started with Elastic Cloud Server.
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 installation package installation package and upload it to the ECS.
Decompress the client tool package.
```
tar -xzf redis-6.2.0.tar.gz
```

Connect to the DB instance in the src directory.

cd redis-6.2.0
make
cd src
./redis-cli -h <DB_HOST> -p <DB_PORT> -a <DB_PWD>

Example:

./redis-cli -h 192.168.0.208 -p 8635 -a <DB_PWD>

**Table 1** Parameter description
Parameter	Description
<DB_HOST>	Specifies the EIP of the instance to be connected. To obtain the EIP, go to the Instance Management page and click the target instance name. The EIP can be found in the EIP column in the Node Information area on the Basic Information page. If the instance you bought has multiple nodes, you can bind the EIP to any node to connect to the instance. If a message is displayed indicating that no EIP has been bound to the instance, bind an EIP to the instance by referring to Binding and Unbinding an EIP.
<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.