Docker-onbuild在代理后面的下载失败

Question

在没有代理的机器上，我编写了main.go、Dockerfile和docker-compose.yml，并成功地完成了docker-compose up。

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
    "log"
    "net/http"
)

func main() {
    redi, err := redis.Dial("tcp", "redis:6379")

/// SNIP ///

    log.Fatal(http.ListenAndServe(":5000", nil))
}

Dockerfile

# Dockerfile
FROM golang:onbuild
EXPOSE 5000

docker-compose.yml

# docker-compose.yml
version: '2'
services:
  web:
    build: .
    ports:
      - 5000:5000
    depends_on:
      - redis
  redis:
    image: redis

但是，(当然)它们不会在代理后面的机器上运行。我修改了Dockerfile和docker-compose.yml；

Dockerfile

# Dockerfile
FROM golang:onbuild
ENV HTTP_PROXY http://proxy.mycompany.com:10080
ENV HTTPS_PROXY http://proxy.mycompany.com:10080
ENV http_proxy http://proxy.mycompany.com:10080
ENV https_proxy http://proxy.mycompany.com:10080
EXPOSE 5000

docker-compose.yml

# docker-compose.yml
version: '2'
services:
  web:
    build: .
    ports:
      - 5000:5000
    volumes:
      - ".:/redis-go-sample"
    depends_on:
      - redis
    environment:
      - HTTP_PROXY=${HTTP_PROXY}
      - HTTPS_PROXY=${HTTP_PROXY}
      - http_proxy=${HTTP_PROXY}
      - https_proxy=${HTTP_PROXY}
  redis:
    image: redis

其结果是；

Building web
Step 1/6 : FROM golang:onbuild
# Executing 3 build triggers...
Step 1/1 : COPY . /go/src/app
 ---> Using cache
Step 1/1 : RUN go-wrapper download
 ---> Running in 8e311bec859c
+ exec go get -v -d
github.com/garyburd/redigo (download)
# cd .; git clone https://github.com/garyburd/redigo /go/src/github.com/garyburd/redigo
Cloning into '/go/src/github.com/garyburd/redigo'...
fatal: unable to access 'https://github.com/garyburd/redigo/': Could not resolve host: github.com
package github.com/garyburd/redigo/redis: exit status 128
ERROR: Service 'web' failed to build: The command '/bin/sh -c go-wrapper download' returned a non-zero code: 1

正如最后一条错误消息所述，我认为问题是由golang或go包装错误处理代理env造成的。

我该如何解决这个问题呢？

Answer 1

环境参数在运行容器时使用，而不是在构建时使用。在你的例子中，建立形象是失败的。您需要使用构建参数。构建参数可以以这样的方式添加到撰写文件中：

version: '2'
services:
  web:
    build:
      context: .
      args:
        - HTTP_PROXY: http://proxy.mycompany.com:10080
        - HTTPS_PROXY: http://proxy.mycompany.com:10080
        - http_proxy: http://proxy.mycompany.com:10080
        - https_proxy: http://proxy.mycompany.com:10080
    ports:
      - 5000:5000
    volumes:
      - ".:/redis-go-sample"
    depends_on:
      - redis
...