我确实发现一些人的设置略有不同，但问题相同。所以我希望这不是一个重复的问题。我的设置非常简单明了。我有一个用于节点应用程序的容器和一个用于Postgres数据库的容器。当我运行docker-compose up并看到日志时，两个容器都已启动并正在运行。问题是我的节点应用程序没有连接到数据库。我可以使用Postbird连接到数据库，它可以正常工作。
如果我只为数据库创建一个docker容器，并直接在我的机器上运行节点应用程序，一切都会很好。所以这不是数据库或应用程序的问题，而是设置的问题。
以下是一些有用的信息：
只为数据库运行docker(连接并完美工作(：
> vigna-backend@1.0.0 dev /Users/lucasbittar/Dropbox/Code/vigna/backend
> nodemon src/server.js
[nodemon] 2.0.2
[nodemon] to restart at any time, enter `rs`
[nodemon] watching dir(s): *.*
[nodemon] watching extensions: js,mjs,json
[nodemon] starting `node -r sucrase/register src/server.js`
Initializing database...
Connecting to DB -> vignadb | PORT: 5432
Executing (default): SELECT 1+1 AS result
Connection has been established successfully -> vignadb
使用docker compose:为每个容器运行一个容器
Creating network "backend_default" with the default driver
Creating backend_db_1 ... done
Creating backend_app_1 ... done
Attaching to backend_db_1, backend_app_1
db_1 |
db_1 | PostgreSQL Database directory appears to contain a database; Skipping initialization
db_1 |
db_1 | 2020-07-24 13:23:32.875 UTC [1] LOG: starting PostgreSQL 12.1 (Debian 12.1-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
db_1 | 2020-07-24 13:23:32.876 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2020-07-24 13:23:32.876 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2020-07-24 13:23:32.881 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2020-07-24 13:23:32.955 UTC [27] LOG: database system was shut down at 2020-07-23 13:21:09 UTC
db_1 | 2020-07-24 13:23:32.999 UTC [1] LOG: database system is ready to accept connections
app_1 |
app_1 | > vigna-backend@1.0.0 dev /usr/app
app_1 | > npx sequelize db:migrate && npx sequelize db:seed:all && nodemon src/server.js
app_1 |
app_1 |
app_1 | Sequelize CLI [Node: 14.5.0, CLI: 5.5.1, ORM: 5.21.3]
app_1 |
app_1 | Loaded configuration file "src/config/database.js".
app_1 |
app_1 | Sequelize CLI [Node: 14.5.0, CLI: 5.5.1, ORM: 5.21.3]
app_1 |
app_1 | Loaded configuration file "src/config/database.js".
app_1 | [nodemon] 2.0.2
app_1 | [nodemon] to restart at any time, enter `rs`
app_1 | [nodemon] watching dir(s): *.*
app_1 | [nodemon] watching extensions: js,mjs,json
app_1 | [nodemon] starting `node -r sucrase/register src/server.js`
app_1 | Initializing database...
app_1 | Connecting to DB -> vignadb | PORT: 5432
我的数据库类：
class Database {
constructor() {
console.log('Initializing database...');
this.init();
}
async init() {
let retries = 5;
while (retries) {
console.log(`Connecting to DB -> ${databaseConfig.database} | PORT: ${databaseConfig.port}`);
const sequelize = new Sequelize(databaseConfig);
try {
await sequelize.authenticate();
console.log(`Connection has been established successfully -> ${databaseConfig.database}`);
models
.map(model => model.init(sequelize))
.map( model => model.associate && model.associate(sequelize.models));
break;
} catch (err) {
console.log(`Error: ${err.message}`);
retries -= 1;
console.log(`Retries left: ${retries}`);
// Wait 5 seconds before trying again
await new Promise(res => setTimeout(res, 5000));
}
}
}
}
Dockerfile:
FROM node:alpine
WORKDIR /usr/app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3333
CMD ["npm", "start"]
docker-compose.yml:
version: "3"
services:
db:
image: postgres
restart: always
environment:
POSTGRES_PASSWORD: postgres
POSTGRES_USER: postgres
POSTGRES_DB: vignadb
volumes:
- ./pgdata:/var/lib/postgresql/data
ports:
- "5432:5432"
app:
build: .
depends_on:
- db
ports:
- "3333:3333"
volumes:
- .:/usr/app
command: npm run dev
package.json(仅限scripps(：
"scripts": {
"dev-old": "nodemon src/server.js",
"dev": "npx sequelize db:migrate && npx sequelize db:seed:all && nodemon src/server.js",
"build": "sucrase ./src -d ./dist --transforms imports",
"start": "node dist/server.js"
},
.env:
# Database
DB_HOST=db
DB_USER=postgres
DB_PASS=postgres
DB_NAME=vignadb
DB_PORT=5432
数据库配置：
require('dotenv/config');
module.exports = {
dialect: 'postgres',
host: process.env.DB_HOST,
username: process.env.DB_USER,
password: process.env.DB_PASS,
database: process.env.DB_NAME,
port: process.env.DB_PORT,
define: {
timestamp: true,
underscored: true,
underscoredAll: true,
},
};
我知道我把事情搞砸了，只是不知道在哪里。如果我能提供更多信息，请告诉我。
谢谢！
您应该将两个容器放在同一个网络中https://docs.docker.com/compose/networking/
并在nodejs连接字符串中调用数据库服务。
类似于：postgres://db:5432/vignadb