Connecting to Redis on go-redis (Go)

Prerequisites

• A Redis instance is created, and is in the Running state. To create a Redis instance, see Buying a DCS Redis Instance.
• View the IP address/domain name and port number of the DCS Redis instance to be accessed. For details, see Viewing and Modifying Basic Settings of a DCS Instance.
• An ECS has been created. For details about how to create an ECS, see Purchasing a Custom ECS
• The client and the Redis instance must be interconnected before connecting to the instance. For details, see Network Conditions for Accessing DCS Redis.

Connecting to Redis on go-redis

1. Log in to the ECS.

   A Windows ECS is used as an example.

2. Install Visual Studio Community 2017 on the ECS.
3. Start Visual Studio and create a project. The project name can be customized. In this example, the project name is set to redisdemo.
4. Import the dependency package of go-redis and enter go get github.com/go-redis/redis on the terminal.
5. Write the following code:

   package main
   
   import (
   	"fmt"
   	"github.com/go-redis/redis"
   )
   
   func main() {
   	// Single-node
   	rdb := redis.NewClient(&redis.Options{
   		Addr:     "host:port",
   		Password: "********", // no password set
   		DB:       0,  // use default DB
   	})
   
   	val, err := rdb.Get("key").Result()
   	if err != nil {
   		if err == redis.Nil {
   			fmt.Println("key does not exists")
   			return
   		}
   		panic(err)
   	}
   	fmt.Println(val)
   
   	//Cluster
   	rdbCluster := redis.NewClusterClient(&redis.ClusterOptions{
   		Addrs:    []string{"host:port"},
   		Password: "********",
   	})
   	val1, err1 := rdbCluster.Get("key").Result()
   	if err1 != nil {
   		if err == redis.Nil {
   			fmt.Println("key does not exists")
   			return
   		}
   		panic(err)
   	}
   	fmt.Println(val1)
   }

   host:port are the IP address/domain name and port number of the DCS Redis instance. For details about how to obtain the IP address/domain name and port, see Prerequisites. Change them as required. ******** indicates the password used to log in to the DCS Redis instance. This password is defined during DCS Redis instance creation.

6. Run the go build -o test main.go command to package the code into an executable file, for example, test.
   

   To run the package in the Linux OS, set the following parameters before packaging:

   set GOARCH=amd64

   set GOOS=linux

7. Run the ./test command to access the DCS instance.