[英]service container fails at connecting to MongoDB container with docker-compose
I have a project with this directory structure:我有一个具有此目录结构的项目:
- other-service/
- my-service/
src/
Dockerfile
.env
docker-compose
.env
I have defined my mongoDB container & service container in a docker-compose.yml file like below:我在 docker-compose.yml 文件中定义了我的 mongoDB 容器和服务容器,如下所示:
version: "3"
services:
my-service:
depends_on:
- mongodb
env_file: ./my-service/.env
container_name: my-service
build: ./my-service
environment:
- DB_HOST=$DB_HOST
- DB_USER=$DB_USER
- DB_PASSWORD=$DB_PASSWORD
- DB_NAME=$DB_NAME
- DB_PORT=$DB_PORT
ports:
- "3002:3002"
mongodb:
image: mongo:latest
container_name: my-mongodb
env_file: ./.env
environment:
MONGO_INITDB_ROOT_USERNAME: $DB_USER
MONGO_INITDB_ROOT_PASSWORD: $DB_PASSWORD
ports:
- $DB_PORT:$DB_PORT
volumes:
- db_vol:/data/db
volumes:
db_vol:
The my-service/.env
file looks like this: my-service/.env
文件如下所示:
DB_HOST=mongodb
DB_USER=root
DB_PASSWORD=pass123
DB_NAME=my_db
DB_PORT=27017
...
The root level .env
looks like this (basically the same content as my-service/.env
for the DB part):根级
.env
看起来像这样(与数据库部分的my-service/.env
内容基本相同):
#used by compose
DB_HOST=mongodb
DB_USER=root
DB_PASSWORD=pass123
DB_NAME=my_db
DB_PORT=27017
my-service
tries to connect to mongoDB with this code: my-service
尝试使用以下代码连接到 mongoDB:
const dbUri=`mongodb://${process.env['DB_USER']}:${process.env['DB_PASSWORD']}@${process.env['DB_HOST']}:${process.env['DB_PORT']}/${process.env['DB_NAME']}`
console.log(`DB connect to: ${dbUri}`);
await mongoose.connect(dbUri, {
useNewUrlParser: true,
useUnifiedTopology: true,
useCreateIndex: true
});
After I run docker-compose build
& docker-compose up -d
.在我运行
docker-compose build
& docker-compose up -d
之后。 The my-mongodb
container is up and running. my-mongodb
容器已启动并正在运行。 But my-service
is not.但
my-service
不是。 I checked the container log, it shows:我检查了容器日志,它显示:
DB connect to: mongodb://root:pass123@mongodb:27017/my_db
...
DatabaseConnError: Database connection failure. undefined
...
statusCode: 500,
msg: 'Database connection failure'
}
Node.js v19.2.0
I feel it is because both containers are on the same Docker bridge.network, the database URI I defined might not correct?我感觉是因为两个容器都在同一个 Docker bridge.network 上,我定义的数据库 URI 可能不正确? But I am not sure.
但我不确定。 Could someone please guide me where could be wrong in my case?
有人可以指导我在我的情况下哪里可能出错吗?
=== UPDATE on 8th of December2022 === === 2022 年 12 月 8 日更新 ===
I dug deeper of my problem, it turned out the problem is actually an AuthenticationError
, full error log is below:我深入研究了我的问题,结果发现问题实际上是
AuthenticationError
,完整的错误日志如下:
Database connection failure. {"ok":0,"code":18,"codeName":"AuthenticationFailed","name":"MongoError"}
It is the same issue @jeeves' answer below has mentioned, then I tried adding ?authSource=admin
like @jeeves suggested:这是@jeeves 在下面的回答中提到的同一个问题,然后我尝试添加
?authSource=admin
就像@jeeves 建议的那样:
DB connect to: mongodb://root:pass123@mongodb:27017/my_db?authSource=admin
but I still get the authentication error.但我仍然收到身份验证错误。 Why?
为什么?
you might need a healthcheck for mongodb.您可能需要对 mongodb 进行健康检查。
version: "3"
services:
my-service:
depends_on:
mongodb:
condition: service_healthy
env_file: ./my-service/.env
container_name: my-service
build: ./my-service
environment:
- DB_HOST=$DB_HOST
- DB_USER=$DB_USER
- DB_PASSWORD=$DB_PASSWORD
- DB_NAME=$DB_NAME
- DB_PORT=$DB_PORT
ports:
- "3002:3002"
mongodb:
image: mongo:latest
container_name: my-mongodb
env_file: ./.env
environment:
MONGO_INITDB_ROOT_USERNAME: $DB_USER
MONGO_INITDB_ROOT_PASSWORD: $DB_PASSWORD
ports:
- $DB_PORT:$DB_PORT
volumes:
- db_vol:/data/db
healthcheck:
test: echo 'db.runCommand("ping").ok' | mongosh localhost:$DB_PORT/test --quiet
interval: 10s
timeout: 10s
retries: 5
start_period: 10s
volumes:
db_vol:
Similar: mongodb and mongo-express not connecting with docker-compose类似: mongodb 和 mongo-express 未连接 docker-compose
I'm not sure where the problem here is.我不确定这里的问题出在哪里。 I certainly had a few issues authenticating with the DB but I believe that that is an issue with the database itself (and my lack of understanding of it;)) and not a docker-compose/.networking problem.
我在使用数据库进行身份验证时确实遇到了一些问题,但我认为这是数据库本身的问题(以及我对它缺乏了解;)),而不是 docker-compose/.networking 问题。
Here is a stripped back (but working) version.这是一个精简(但有效)的版本。
Directory structure目录结构
docker-compose file docker-compose 文件
version: "3"
services:
my-service:
depends_on:
- mongodb
container_name: my-service
build: ./my-service
environment:
- DB_HOST=mongodb
- DB_USER=root
- DB_PASSWORD=password123
- DB_NAME=test
- DB_PORT=27017
ports:
- "3002:3002"
mongodb:
image: mongo:latest
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: password123
ports:
- "27017:27017"
Dockerfile Dockerfile
FROM node:19
WORKDIR /usr/src/app
COPY . .
RUN npm install
USER node
CMD ["node", "index.js"]
And my index.js还有我的 index.js
Note: added following query param ?authSource=admin
to connection string.注意:添加以下查询参数
?authSource=admin
到连接字符串。
const mongoose = require('mongoose');
console.log(process.env);
const dbUri=`mongodb://${process.env['DB_USER']}:${process.env['DB_PASSWORD']}@${process.env['DB_HOST']}:${process.env['DB_PORT']}/${process.env['DB_NAME']}?authSource=admin`
console.log(dbUri, {
useNewUrlParser: true,
useUnifiedTopology: true,
useCreateIndex: true
});
mongoose.connect(dbUri).then(() => console.log('is connected'))
.catch((error) => console.log(error));
Then execute following:然后执行以下:
$ cd demo
$ docker-compose build
$ docker-compose up mongodb
$ docker-compose up my-service
Output from my-service: Output 来自我的服务:
$ docker-compose up my-service
demo_mongodb_1 is up-to-date
Recreating my-service ... done
Attaching to my-service
my-service | {
my-service | NODE_VERSION: '19.2.0',
my-service | HOSTNAME: 'ea324ba32274',
my-service | DB_PORT: '27017',
my-service | YARN_VERSION: '1.22.19',
my-service | HOME: '/home/node',
my-service | DB_NAME: 'test',
my-service | PATH: '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin',
my-service | DB_PASSWORD: 'password123',
my-service | PWD: '/usr/src/app',
my-service | DB_HOST: 'mongodb',
my-service | DB_USER: 'root'
my-service | }
my-service | mongodb://root:password123@mongodb:27017/test?authSource=admin
my-service | (node:1) [MONGOOSE] DeprecationWarning: Mongoose: the `strictQuery` option will be switched back to `false` by default in Mongoose 7. Use `mongoose.set('strictQuery', false);` if you want to prepare for this change. Or use `mongoose.set('strictQuery', true);` to suppress this warning.
my-service | (Use `node --trace-deprecation ...` to show where the warning was created)
my-service | is connected
The additional query string is doing nothing for connectivity between containers.额外的查询字符串对容器之间的连接没有任何作用。 I was getting an authentication error when connecting - but that still meant containers had connectivity.
我在连接时收到身份验证错误 - 但这仍然意味着容器具有连接性。
Hope this helps希望这可以帮助
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