[英]docker compose using node js and mysql - unable to connect with mysql
我正在嘗試使用docker部署我的節點js應用程序,但是當我運行docker時,它會在最后給出一個錯誤。 我嘗試了一些像使用wait-for-it.sh文件的解決方案,但問題仍然存在。
泊塢窗,compose.yml
version: '3'
services:
db:
build:
context: .
dockerfile: ./docker/Dockerfile-mysql
environment:
- MYSQL_ALLOW_EMPTY_PASSWORD=yes
- MYSQL_DATABASE=dbautokab
- MYSQL_USER=root
- MYSQL_PASSWORD=
networks:
- helicopter-network
healthcheck:
test: "exit 0"
helicopter-api:
build:
context: .
dockerfile: ./docker/Dockerfile-api
depends_on:
- db
networks: ['helicopter-network']
environment:
- PORT=3000
- DATABASE_HOST=db
- DATABASE_PASSWORD=
- EGG_SERVER_ENV=local
- NODE_ENV=development
ports:
- "3000:3000"
networks:
helicopter-network:
driver: bridge
Dockerfile-API
FROM node:10-slim
USER node
RUN mkdir -p /home/node/app
WORKDIR /home/node/app
COPY --chown=node package*.json ./
RUN npm install
COPY --chown=node . .
COPY wait-for-it.sh /
ENV HOST=0.0.0.0 PORT=3000
EXPOSE ${PORT}
# Run when the container launches
#CMD [ "node", "." ]
CMD /wait-for-it.sh db:3306 -- npm start
Dockerfile MySQL的
FROM mysql
COPY ./docker/init_db.sql /docker-entrypoint-initdb.d/
init_db.sql
CREATE DATABASE IF NOT EXISTS dbautokab;
GRANT ALL PRIVILEGES on dbautokab.*
TO 'root'@'%'
WITH GRANT OPTION;
db.js
var mysql = require('mysql');
var db_config = {
host : '127.0.0.1', // Your host - either local or cloud
user : 'root', // your username
password : '', // your password
database : 'dbautokab' // database name
};
var connection;
function handleDisconnect() {
connection = mysql.createConnection(db_config); // Recreate the connection, since
// the old one cannot be reused.
connection.connect(function(err) { // The server is either down
if(err) { // or restarting (takes a while sometimes).
console.log('error when connecting to db:', err);
setTimeout(handleDisconnect, 2000); // We introduce a delay before attempting to reconnect,
}
// to avoid a hot loop, and to allow our node script to
}); // process asynchronous requests in the meantime.
// If you're also serving http, display a 503 error.
connection.on('error', function(err) {
console.log('db error', err);
if(err.code === 'PROTOCOL_CONNECTION_LOST') { // Connection to the MySQL server is usually
handleDisconnect(); // lost due to either server restart, or a
} else { // connnection idle timeout (the wait_timeout
throw err; // server variable configures this)
}
});
}
handleDisconnect();
module.exports = connection;
錯誤:
直升機-api_1 | 服務器在3000上
直升機-api_1 | 連接到db時出錯:{錯誤:連接ECONNREFUSED 127.0.0.1:3306
直升機-api_1 | at TCPConnectWrap.afterConnect [as oncomplete](net.js:1106:14)
直升機-api_1 | --------------------
直升機-api_1 | 在Protocol._enqueue(/home/node/app/node_modules/mysql/lib/protocol/Protocol.js:144:48)
直升機-api_1 | 在Protocol.handshake(/home/node/app/node_modules/mysql/lib/protocol/Protocol.js:51:23)
直升機-api_1 | 在Connection.connect(/home/node/app/node_modules/mysql/lib/Connection.js:119:18)
直升機-api_1 | 在handleDisconnect(/home/node/app/db.js:16:16)
直升機-api_1 | 在對象。 (/home/node/app/db.js:35:1)
直升機-api_1 | 在Module._compile(internal / modules / cjs / loader.js:776:30)
直升機-api_1 | 在Object.Module._extensions..js(internal / modules / cjs / loader.js:787:10)
直升機-api_1 | 在Module.load(internal / modules / cjs / loader.js:653:32)
直升機-api_1 | 在tryModuleLoad(internal / modules / cjs / loader.js:593:12)
直升機-api_1 | 在Function.Module._load(internal / modules / cjs / loader.js:585:3)
直升機-api_1 | 錯誤:'ECONNREFUSED',
直升機-api_1 | 代碼:'ECONNREFUSED',
直升機-api_1 | 系統調用:'connect',
直升機-api_1 | 地址:'127.0.0.1',
直升機-api_1 | 港口:3306,
直升機-api_1 | 致命的:真的}
db_1 |
db_1 | /usr/local/bin/docker-entrypoint.sh:運行/docker-entrypoint-initdb.d/init_db.sql
db_1 |
db_1 |
您的nodejs app
& db
不在同一容器中,因此db.js
無法使用ip 127.0.0.1
訪問db。
將container_name: mydb
添加到您的數據庫服務,如下所示:
services:
db:
build:
context: .
dockerfile: ./docker/Dockerfile-mysql
container_name: mydb
然后,在db.js
使用容器名稱來訪問db:
var db_config = {
host : 'mydb', // Your host - either local or cloud
user : 'root', // your username
password : '', // your password
database : 'dbautokab' // database name
};
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