Question

当我尝试使用Sequelize连接后端时，出现以下错误：

# This is the first dataframe  
make <- c("PORSCHE", "TESLA", "MITSUBISHI")
model <- c("Cayenne", "Model S", "Outlander - PHEV")
year <- c(2017, 2013, 2018)
electrification_level <- (PHEV, BEV, PHEV)
vin_data <- data.frame(make, model, year, electrification_level)

# This is the second dataframe    
make <- c("Porsche", "Tesla", "Mitsubishi")
# There are multiple versions of the models (an average of these would be ideal - e.g. avg. mpg)
model <- c("Cayenne S e-Hybrid", "Model S AWD - P85D", "Outlander 2WD")
year <- c(2017, 2013, 2018)
# These mpg are made up for the example
mpg <- c(75, 120, 80)
fueleconomy_data <- data.frame(make, model, year, mpg)

docker-compose.yml ：

error ConnectionRefusedError [SequelizeConnectionRefusedError]: connect ECONNREFUSED 127.0.0.1:5432

我做错了什么？

预先感谢

Answer 1

假设您的后端正在连接到数据库，则应添加一个depends_on：

  backend:
    build:
      context: ./server
      dockerfile: Dockerfile
    image: server
    depends_on:
      - db
    ports:
      - "8000:8000"
    volumes:
      - ./server:/usr/src/app

如果您的应用程序配置为连接到db:5432或localhost:5432，则现在可以在主机172.0.0.1:5432上访问数据库，您需要将主机名localhost替换为db。您的postgres连接字符串也可能没有主机，并且可能默认情况下尝试连接到localhost。应该能够看一下续集找出如何通过主机。

后端容器无法连接到数据库-Sequelize，Node，Postgres，Docker

1 个答案: