Cannot download Docker images behind a proxy
docker, proxy
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`.
Problem
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?