denet-node-server/model/redis_db.js

var Redis = require('ioredis');  //导入 安装好的 redis.  npm i ioredis --save 
var config = require('../config/config.js') // 导入位置文件

//redis 服务启动 /usr/local/bin/redis-server /usr/local/etc/redis.conf


var port = config.db_config.test.redis.PORT
var host = config.db_config.test.redis.HOST
var username = config.db_config.test.redis.USERNAME
var password = config.db_config.test.redis.PASSWORD
if (config.build_config.open_test == 0) {
  port = config.db_config.main.redis.PORT
  host = config.db_config.main.redis.HOST
  username = config.db_config.main.redis.USERNAME
  password = config.db_config.main.redis.PASSWORD
}

var REDIS_INSTANCE = new Redis({
  port: port,
  host: host,
  username: username,
  password: password,
  connectTimeout: 10000,
});

// var REDIS_INSTANCE = new Redis.Cluster([
//   {
//     port: port,
//     password: password,
//     host: host,
//   },
// ]);

REDIS_INSTANCE.on('connect', () => {
  console.log('connected to redis')
})

REDIS_INSTANCE.on('error', function (err) {
  console.log('redis  Error ', err);
});

function redis_set(key, value) {
  REDIS_INSTANCE.set(key, value);
}

async function redis_get(key) {
  console.log("redis get=",key);
  return await REDIS_INSTANCE.get(key);
}

module.exports = {
  redis_set,
  redis_get,
}