[英]go get in Dockerfile. I got cannot find package error
我在“docker-compose”期间添加了RUN go get
来安装软件包。 但是,当我运行go build
时发生了以下cannot find package
错误。 我发现这些包保存在/go/pkg/linux_amd64/
。
运行 docker-compose 并开始构建
$ docker-compose up -d
$ docker exec -it explorer-cli /bin/bash
# pwd
/go
# ls
bin pkg src
# echo $GOPATH
/go
# ls /go/pkg/linux_amd64/github.com/
go-sql-driver
# go build -i -o /go/bin/explorer-cli src/main.go
src/main.go:6:2: cannot find package "github.com/go-sql-driver/mysql" in any of:
/usr/local/go/src/github.com/go-sql-driver/mysql (from $GOROOT)
/go/src/github.com/go-sql-driver/mysql (from $GOPATH)
(it worked if I run "go get" manually)
# go get github.com/go-sql-driver/mysql
# ls src/
github.com main.go
# go build -i -o /go/bin/explorer-cli src/main.go
docker-compose.yml
version: '3.4'
services:
mysql:
image: mysql:latest
container_name: database
volumes:
- ./docker/:/etc/mysql/conf.d
- ./docker/:/docker-entrypoint-initdb.d
environment:
- MYSQL_RANDOM_ROOT_PASSWORD=true
- MYSQL_DATABASE=explorer
- MYSQL_USER=admin
- MYSQL_PASSWORD=12dlql*41
app:
build: .
tty: true
image: explorer-cli:latest
container_name: explorer-cli
volumes:
- ./src:/go/src
external_links:
- database
文件
FROM golang:latest
RUN apt-get update
RUN apt-get upgrade -y
ENV GOBIN /go/bin
RUN go get github.com/go-sql-driver/mysql
main.go
package main
import (
"database/sql"
_ "github.com/go-sql-driver/mysql"
)
func main() {
db, err := sql.Open("mysql", "XUSER:XXXX@(database:3306)/explorer")
if err != nil {
panic(err.Error())
}
defer db.Close()
}
更新 1
我注意到以下目录之间存在很大差异。
# ls /go/pkg/linux_amd64/github.com/go-sql-driver/
mysql.a
# ls /go/src/github.com/go-sql-driver/mysql/
AUTHORS connection_go18_test.go packets.go
CHANGELOG.md connection_test.go packets_test.go
CONTRIBUTING.md const.go result.go
LICENSE driver.go rows.go
README.md driver_go18_test.go statement.go
appengine.go driver_test.go statement_test.go
benchmark_go18_test.go dsn.go transaction.go
benchmark_test.go dsn_test.go utils.go
buffer.go errors.go utils_go17.go
collations.go errors_test.go utils_go18.go
connection.go fields.go utils_go18_test.go
connection_go18.go infile.go utils_test.go
更新 2
正如@aerokite 所说,“卷”正在覆盖下载的包。 我改变了以下内容并且它起作用了。
文件
version: '3.4'
FROM golang:latest
RUN apt-get update
RUN apt-get upgrade -y
ENV GOBIN /go/bin
RUN go get github.com/go-sql-driver/mysql
RUN mkdir /go/src/explorer-cli
docker-compose
services:
mysql:
image: mysql:latest
container_name: database
volumes:
- ./docker/:/etc/mysql/conf.d
- ./docker/:/docker-entrypoint-initdb.d
environment:
- MYSQL_RANDOM_ROOT_PASSWORD=true
- MYSQL_DATABASE=explorer
- MYSQL_USER=XUSER
- MYSQL_PASSWORD=XXXX
app:
build: .
tty: true
image: explorer-cli:latest
container_name: explorer-cli
volumes:
- ./src/explorer-cli:/go/src/explorer-cli
external_links:
- database
去建造
go build -i -o /go/bin/explorer-cli src/explorer-cli/main.go
我试图重现你的问题。
FROM golang:latest
RUN apt-get update
RUN apt-get upgrade -y
ENV GOBIN /go/bin
RUN go get github.com/go-sql-driver/mysql
您已提供此 Dockerfile。 我已经建立了
$ docker build -t test .
现在我 exec 进入这个图像来运行你的go build
命令。
$ docker run -it test bash
然后我在/go/src
目录中创建了您提供的main.go
。
最后,我已经成功构建,没有任何错误
$ go build -i -o /go/bin/explorer-cli src/main.go
我想我已经找到了你的问题。 我从未使用过docker-compose
。 但是你会明白的。
问题在这里:
app:
build: .
tty: true
image: explorer-cli:latest
container_name: explorer-cli
volumes:
- ./src:/go/src <-- problem is here
external_links:
- database
您正在将./src
安装到./src
/go/src
目录中。 此过程使用本地./src
目录/go/src
。 这是删除您从go get github.com/go-sql-driver/mysql
你明白吗?
但是当您运行go get github.com/go-sql-driver/mysql
,它现在再次获取数据。
解决方案(01):
将您的本地卷安装到其他地方。
volumes:
- ./src:/tmp/src
并修改您的 Dockerfile 以将此main.go
移动到/go/src
解决方案(02):
将main.go
复制到您的main.go
。 在 Dockerfile 中添加这一行
COPY ./src/main.go /go/src
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