[英]Can not connect to mysql docker image connection refused
我刚刚将我的旧公司计算机更换为新计算机(MACOS),下载项目,现在我尝试连接到 mysql docker 映像,但我总是得到
拨 tcp 127.0.0.1:3306: 连接: 连接被拒绝
在我的旧电脑上一切正常,但现在我遇到了这个问题。
我的 docker compose(未显示所有内容):
version: "3"
services:
mysql:
image: mysql:5.6
ports:
- "3306:3306"
volumes:
- mysql-data:/var/lib/mysql
- ./docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
environment:
MYSQL_ROOT_PASSWORD: a
LANG: C.UTF-8
adminer:
image: adminer
ports:
- 8082:8080
nginx:
build: ../docker-shared/nginx
ports:
- 443:443
volumes:
- "./nginx_proxy_settings.conf:/etc/nginx/conf.d/nginx_proxy_settings.conf"
volumes:
mysql-data:
因此,如果我执行docker-compose up
一切正常,您可以查看 Adminer 正在处理数据的下一张图像:
这是我连接到 mysql 的 Golang 代码:
func main() {
dbConfig := mysql.NewConfig()
dbConfig.User = "root"
dbConfig.Passwd = "a"
dbConfig.Addr = "mysql"
dbConfig.DBName = "company_prod"
db, err := sql.Open("mysql", dbConfig.FormatDSN())
if err != nil {
panic(err)
}
defer db.Close()
}
你知道我做错了什么吗??
谢谢
问题是你的 go 代码无法解析mysql
地址,因为它没有部署在 compose 文件中。
要解决这个问题,您有两种解决方案:
mysql
更改为localhost:3306
(我看到你编辑了你的 compose 并且端口被暴露了,所以你只需要在你的代码中更改地址)对于第一个解决方案,您可以将一个简单的 Go 应用程序构建到 Docker 镜像中,如下所示:
# Build stage
FROM golang:alpine AS build-env
COPY . /go/src/your/project/path
WORKDIR /go/src/your/project/path
RUN apk update && \
apk upgrade && \
<install your deps here if needed>
# Install dep if needed
ENV DEP_VERSION="0.4.1"
RUN curl -L -s https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 -o $GOPATH/bin/dep
RUN chmod +x $GOPATH/bin/dep
RUN dep ensure
# Build your app
RUN go build -o myapp
# Final stage
FROM alpine
WORKDIR /app/myapp
COPY --from=build-env /go/src/your/project/path /app/myapp
ENTRYPOINT ["/app/myapp/myapp"]
然后将其添加到您的撰写文件中:
version: "3"
services:
mysql:
image: mysql:5.6
ports:
- "3306:3306"
volumes:
- mysql-data:/var/lib/mysql
- ./docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
environment:
MYSQL_ROOT_PASSWORD: a
LANG: C.UTF-8
adminer:
image: adminer
ports:
- 8082:8080
myapp:
build: .
depends_on:
- mysql
nginx:
build: ../docker-shared/nginx
ports:
- 443:443
volumes:
- "./nginx_proxy_settings.conf:/etc/nginx/conf.d/nginx_proxy_settings.conf"
volumes:
mysql-data:
并将端口和传输添加到您的应用程序代码中:
func main() {
dbConfig := mysql.NewConfig()
dbConfig.User = "root"
dbConfig.Passwd = "a"
dbConfig.Addr = "mysql:3306"
dbConfig.DBName = "websays_prod"
dbConfig.Net = "tcp"
db, err := sql.Open("mysql", dbConfig.FormatDSN())
if err != nil {
panic(err)
}
defer db.Close()
}
如果您不想 dockerize 应用程序,则第二种解决方案是将代码更改为:
func main() {
dbConfig := mysql.NewConfig()
dbConfig.User = "root"
dbConfig.Passwd = "a"
dbConfig.Addr = "localhost:3306"
dbConfig.DBName = "websays_prod"
dbConfig.Net = "tcp"
db, err := sql.Open("mysql", dbConfig.FormatDSN())
if err != nil {
panic(err)
}
defer db.Close()
}
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