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proxydocker

Cannot download Docker images behind a proxy

I installed Docker on my Ubuntu 13.10 (Saucy Salamander) and when I type in my console:

sudo docker pull busybox

I get the following error:

Pulling repository busybox
2014/04/16 09:37:07 Get https://index.docker.io/v1/repositories/busybox/images: dial tcp: lookup index.docker.io on 127.0.1.1:53: no answer from server

Docker version:

$ sudo docker version

Client version: 0.10.0
Client API version: 1.10
Go version (client): go1.2.1
Git commit (client): dc9c28f
Server version: 0.10.0
Server API version: 1.10
Git commit (server): dc9c28f
Go version (server): go1.2.1
Last stable version: 0.10.0

I am behind a proxy server with no authentication, and this is my /etc/apt/apt.conf file:

Acquire::http::proxy "http://192.168.1.1:3128/";
Acquire::https::proxy "https://192.168.1.1:3128/";
Acquire::ftp::proxy "ftp://192.168.1.1:3128/";
Acquire::socks::proxy "socks://192.168.1.1:3128/";

What am I doing wrong?

Solution

  • Here is a link to the official Docker documentation for proxy HTTP: https://docs.docker.com/config/daemon/systemd/#httphttps-proxy

    A quick outline:

    First, create a systemd drop-in directory for the Docker service:

    mkdir /etc/systemd/system/docker.service.d

    Now create a file called /etc/systemd/system/docker.service.d/http-proxy.conf that adds the HTTP_PROXY and HTTPS_PROXY environment variables:

    [Service]
Environment="HTTP_PROXY=http://proxy.example.com:80/"
Environment="HTTPS_PROXY=http://proxy.example.com:80/"

    If you have internal Docker registries that you need to contact without proxying you can specify them via the NO_PROXY environment variable:

    Environment="HTTP_PROXY=http://proxy.example.com:80/"
Environment="HTTPS_PROXY=http://proxy.example.com:80/"
Environment="NO_PROXY=localhost,127.0.0.0/8,docker-registry.somecorporation.com"

    Flush changes:

    $ sudo systemctl daemon-reload

    Verify that the configuration has been loaded:

    $ sudo systemctl show --property Environment docker
Environment=HTTP_PROXY=http://proxy.example.com:80/
Environment=HTTPS_PROXY=http://proxy.example.com:80/

    Restart Docker:

    $ sudo systemctl restart docker

    Footnote regarding HTTP_PROXY vs. HTTPS_PROXY: for a long time, setting HTTP_PROXY alone has been good enough. But with version 20.10.8, Docker has moved on to Go 1.16, which changes the semantics of this variable: https://golang.org/doc/go1.16#net/http
    For https:// URLs, the proxy is now determined by the HTTPS_PROXY variable, with no fallback on HTTP_PROXY.