Docker: npm install behind proxy

Question

I have this Dockerfile:

FROM node:argon

ENV http_proxy http://user:pass@proxy.company.priv:3128
ENV https_proxy https://user:pass@proxy.company.priv:3128

RUN m         


        

Answer 1

I also had the same issue and did not want to set any proxy information in my image as I did not want be dependant of my company environment.

My solution was to use a cntlm running in gateway mode. To do so I put the flag Gateway set to yes the following allow rules in my cntlm configuration file:

 Gateway         yes
 # Allow local
 Allow           127.0.0.1
 # Allow docker subnetwork
 Allow           172.17.0.0/16

Then I was able to run my docker file by getting the dokcer0 interface address (got with ifconfigcommand):

docker build -t my-image --build-arg HTTP_PROXY=http://172.17.0.1:3128 --build-arg HTTPS_PROXY=http://172.17.0.1:3128 .

Same with docker run:

docker run --rm -e HTTP_PROXY=http://172.17.0.1:3128 --build-arg HTTPS_PROXY=http://172.17.0.1:3128 my-image

However please note that since docker 17.07 you can simply configure the docker client proxy.

Hence your ~/.docker/config.json will be like

{
  "proxies": {
      "default":{
          "httpProxy": "http://172.17.0.1:3128/",
          "httpsProxy": "http://172.17.0.1:3128/",
          "noProxy": "127.0.0.1,172.17.0.0/16,*.some.compagny.domain"
      }
}