Docker撰写：无法连接到Redis

我在这里https://docs.docker.com/get-started/part5/#recap-optional下面的Docker Compose教程

version: "3" services: web: image: example/get-started:part-1 deploy: replicas: 10 resources: limits: cpus: "0.1" memory: 50M restart_policy: condition: on-failure ports: - "80:80" networks: - webnet visualizer: image: dockersamples/visualizer:stable ports: - "8080:8080" volumes: - "/var/run/docker.sock:/var/run/docker.sock" deploy: placement: constraints: [node.role == manager] networks: - webnet redis: image: redis ports: - "6379:6379" volumes: - ./data:/data deploy: placement: constraints: [node.role == manager] networks: - webnet driver: build: . links: - redis networks: webnet: 

而Redis似乎在myvm1上运行，应用程序无法连接到它，并给出错误。

这是重要的应用程序代码：

 from flask import Flask from redis import Redis, RedisError import os import socket redis = Redis(host="redis", db=0, socket_connect_timeout=0, socket_timeout=0) app = Flask(__name__) @app.route("/") def hello(): try: visits = redis.incr("counter") except RedisError: visits = "<i>cannot connect to redis. Counter disabled</i>" html = "<h3>Hello {name}!</h3>" \ "<b>Hostname:</b> {hostname}<br/>" \ "<b>Visits:</b> {visits}" return html.format(name=os.getenv("NAME", "World"), hostname=socket.gethostname(), visits=visits) if __name__ == "__main__": app.run(host='0.0.0.0', port=80) 

VM IP：

myvm1 – virtualbox运行tcp：//192.168.99.101：2376
v17.07.0策

myvm2 – virtualbox运行tcp：//192.168.99.102：2376
v17.07.0策

Redis在虚拟机上运行没有错误。

任何想法？ 网上有很多类似的讨论，但都没有帮助。

Answer 1

如果redis在虚拟机上运行，​​绑定可能不正确。 你可以请检查它的绑定是否在0.0.0.0或者你需要编辑redisconfiguration绑定到0.0.0.0和端口的外部服务连接到它