无法将Redis服务器连接到Node.js,Docker撰写了

时间:2019-12-22 21:52:27

标签: javascript node.js docker redis

我正在努力将Redis部署连接到我的nodejs应用程序。当然,在本地不使用docker的情况下,它可以很好地工作,所以我对于这是否与我的代码有关,还是与我设置docker compose文件有关的方式存有争议

Dockerfile:

FROM node:8
WORKDIR /app
COPY package.json /app
COPY . /app
RUN npm install
CMD ["npm", "start"]
EXPOSE 3000

docker-compose.yml

version: "3"
services:
  web:
    container_name: web-container
    restart: always
    depends_on:
      - redis
    build: . 
    ports: 
    - "3000:3000"
    links: 
      - redis
  redis:
    container_name: redis-container
    image: "redis:latest"
    ports:
      - "6379:6379"
    volumes:
      - ./data:/data

Redis连接文件(RedisService.js)

const redis         = require("redis");
const client        = redis.createClient();
const DbUtils       = require("../../db_utils");
const {promisify}   = require("util");
const getAsync      = promisify(client.get).bind(client);
const existsAsync   = promisify(client.exists).bind(client);

class RedisCache {
    constructor () {
        var connected;
        // * Initiliase the connection to redis server
        client.on("connect", () => {console.log("? Redis cache is ready"); connected = true;})
        client.on("error", (e) => {console.log("Redis cache error:\n" + e); connected = false;});
    }

    async setData (id, data) {
        // * Stringify data if it's an object
        data = data instanceof Object ? JSON.stringify(data) : data;
        client.set(id, data);
        return true;
    }

    async getData (key) {
        return getAsync(key).then(data => {
            data = JSON.parse(data) instanceof Object ? JSON.parse(data) : data;
            return data; 
        })
    }

    async exists (key) {
        return existsAsync(key).then(bool => {
            return bool;
        })
    }

    // Returns status of redis cache
    async getStatus () {
        return this.connected;
    }
}

module.exports = new RedisCache();

错误 错误:Redis与127.0.0.11:6379的连接失败-连接ECONNREFUSED 127.0.0.11:6379

1 个答案:

答案 0 :(得分:1)

通过docker-compose运行容器时,它们都已连接到公共网络。服务名称是给定容器的DNS名称,因此要从redis访问web容器,您应该像这样创建客户端:

const client = redis.createClient({
        port      : 6379,
        host      : 'redis'
});

您尚未配置主机,因此它使用默认主机-127.0.0.1。但是从您的web容器的角度来看,redis不在本地主机上运行。相反,它在自己的容器中运行,该容器的DNS名称为redis