Docker + MYSQL：无法访问容器外的mysql

Question

我有2个docker容器，它们都包含mysql数据库，我打开每个端口3305,3306。

对于3306：3306的容器，我可以通过

访问容器外的容器

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, Numeric, String

import os
cwd = os.getcwd()
import sys
sys.path.insert(0, cwd + '/vatic-docker/vatic')
#from models import *

engine = create_engine('mysql://root:1111' '@172.17.0.2:3306/vatic')
Session = sessionmaker (bind = engine)
session = Session()

Base = declarative_base()

但是我无法通过

访问3305：3306容器的mysql数据库

engine = create_engine('mysql://root:1111' '@172.17.0.3:3306/vatic')

返回错误消息：

sqlalchemy.exc.OperationalError: (_mysql_exceptions.OperationalError) (2003, "Can't connect to MySQL server on '172.17.0.3' (111)")

我现在该怎么办？

Answer 1

连接字符串中的端口错误

所以

@Injectable()
export class HeroService {
  private heroesUrl = 'app/hero.json';

  constructor (private http: Http) {}

  getHeroes(): Observable<Hero[]> {
    // debugger;
    return this.http.get(this.heroesUrl)
                    .map(this.extractData)
                    .catch(this.handleError);
  }
  private extractData(res: Response) {
    // http.get or http.post return the json obj
    let body = res.json();
    return body.data || { };
  }

应该是

firebase.auth().getRedirectResult().then(result => {
   var user = result.user;
   if (user) {
     // Save user.
   }
}).catch(e => {
});

因为engine = create_engine('mysql://root:1111' '@172.17.0.3:3306/vatic') 是您在主机上公开的端口

具体而言，如果Docker主机具有IP地址engine = create_engine('mysql://root:1111@<host IP>:3305/vatic') ，则连接应为

3305

https://docs.docker.com/engine/reference/commandline/run/#publish-or-expose-port--p---expose