【发布时间】：2018-12-11 06:11:57
【问题描述】：
我正在尝试使用命令 docker-compose up 将 官方 MariaDB docker 映像 连接到我的客户端应用程序的映像；它成功连接到服务器，但是在尝试连接到 MariaDB 数据库时，大约一分钟后记录了 “错误：连接丢失：服务器关闭了连接。” 我在本地连接到数据库没有问题在启动服务器时，但在尝试链接相同代码的 docker 图像时会引发错误。
我的 docker-compose.yml：
version: '3.1'
services:
webapp:
image: client
ports:
- "3306:3306"
links:
- db
depends_on:
- db
environment:
DATABASE_URL: "mysql://root:root@db/yelp"
db:
image: mariadb:latest
restart: always
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: yelp
adminer:
image: adminer
restart: always
ports:
- 3001:3001
Dockerfile：
FROM node:10
WORKDIR /cadenza/documents/SDC/leaveReview
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3306
CMD ["npm", "start"]
mysql/MariaDB index.js 连接文件：
var mysql = require('mysql')
var connection = mysql.createConnection({
host: '127.0.0.1',
user: 'root',
password: 'root',
database: 'yelp'
});
connection.connect((err) => {
if (err) {
console.log('error when connecting to db', err);
} else {
console.log('connected to db')
}
});
module.exports = connection;
运行 docker-compose up 时的日志：
docker-compose up
Starting leavereview_db_1 ... done
Starting leavereview_adminer_1 ... done
Starting leavereview_webapp_1 ... done
Attaching to leavereview_adminer_1, leavereview_db_1, leavereview_webapp_1
adminer_1 | PHP 7.2.7 Development Server started at Tue Jul 3 02:34:03 2018
webapp_1 |
webapp_1 | > yelp-reviews@1.0.0 start /cadenza/documents/SDC/leaveReview
webapp_1 | > nodemon server/index.js
webapp_1 |
db_1 | 2018-07-03 2:34:04 0 [Note] mysqld (mysqld 10.3.7-MariaDB-1:10.3.7+maria~jessie) starting as process 1 ...
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Using Linux native AIO
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Uses event mutexes
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Compressed tables use zlib 1.2.8
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Number of pools: 1
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Using SSE2 crc32 instructions
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Initializing buffer pool, total size = 256M, instances = 1, chunk size = 128M
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Completed initialization of buffer pool
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=1630896
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: 128 out of 128 rollback segments are active.
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Creating shared tablespace for temporary tables
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Waiting for purge to start
webapp_1 | [nodemon] 1.17.5
webapp_1 | [nodemon] to restart at any time, enter `rs`
webapp_1 | [nodemon] watching: *.*
webapp_1 | [nodemon] starting `node server/index.js`
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: 10.3.7 started; log sequence number 1630905; transaction id 21
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
db_1 | 2018-07-03 2:34:04 0 [Note] Plugin 'FEEDBACK' is disabled.
db_1 | 2018-07-03 2:34:04 0 [Note] Recovering after a crash using tc.log
db_1 | 2018-07-03 2:34:04 0 [Note] Starting crash recovery...
db_1 | 2018-07-03 2:34:04 0 [Note] Crash recovery finished.
db_1 | 2018-07-03 2:34:04 0 [Note] Server socket created on IP: '::'.
db_1 | 2018-07-03 2:34:04 0 [Note] InnoDB: Buffer pool(s) load completed at 180703 2:34:04
db_1 | 2018-07-03 2:34:04 0 [Warning] 'proxies_priv' entry '@% root@a1a244ac54cf' ignored in --skip-name-resolve mode.
db_1 | 2018-07-03 2:34:04 0 [Note] Reading of all Master_info entries succeded
db_1 | 2018-07-03 2:34:04 0 [Note] Added new Master_info '' to hash table
db_1 | 2018-07-03 2:34:04 0 [Note] mysqld: ready for connections.
db_1 | Version: '10.3.7-MariaDB-1:10.3.7+maria~jessie' socket: '/var/run/mysqld/mysqld.sock' port: 3306 mariadb.org binary distribution
webapp_1 | Listening on port 3306
webapp_1 | error when connecting to db { Error: Connection lost: The server closed the connection.
webapp_1 | at Protocol.end (/cadenza/documents/SDC/leaveReview/node_modules/mysql/lib/protocol/Protocol.js:113:13)
webapp_1 | at Socket.<anonymous> (/cadenza/documents/SDC/leaveReview/node_modules/mysql/lib/Connection.js:109:28)
webapp_1 | at Socket.emit (events.js:187:15)
webapp_1 | at endReadableNT (_stream_readable.js:1081:12)
webapp_1 | at process._tickCallback (internal/process/next_tick.js:63:19)
webapp_1 | --------------------
webapp_1 | at Protocol._enqueue (/cadenza/documents/SDC/leaveReview/node_modules/mysql/lib/protocol/Protocol.js:145:48)
webapp_1 | at Protocol.handshake (/cadenza/documents/SDC/leaveReview/node_modules/mysql/lib/protocol/Protocol.js:52:23)
webapp_1 | at Connection.connect (/cadenza/documents/SDC/leaveReview/node_modules/mysql/lib/Connection.js:130:18)
webapp_1 | at Object.<anonymous> (/cadenza/documents/SDC/leaveReview/database/index.js:9:12)
webapp_1 | at Module._compile (internal/modules/cjs/loader.js:702:30)
webapp_1 | at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
webapp_1 | at Module.load (internal/modules/cjs/loader.js:612:32)
webapp_1 | at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
webapp_1 | at Function.Module._load (internal/modules/cjs/loader.js:543:3)
webapp_1 | at Module.require (internal/modules/cjs/loader.js:650:17) fatal: true, code: 'PROTOCOL_CONNECTION_LOST' }
webapp_1 | (node:29) [DEP0096] DeprecationWarning: timers.unenroll() is deprecated. Please use clearTimeout instead.
它应该记录 "connected to db"。我还尝试了人们建议的解决方案，用于处理由于空闲等原因导致的服务器断开连接，但它甚至一开始都没有连接到数据库。
【问题讨论】：
标签： mysql node.js docker docker-compose mariadb