How to configure docker to use HTTP proxy

sudo /etc/default/docker

export http_proxy="http://127.0.0.1:3128/"
export https_proxy="http://127.0.0.1:3128/"
export HTTP_PROXY="http://127.0.0.1:3128/"
export HTTPS_PROXY="http://127.0.0.1:3128/"

sudo service docker restart

sudo mkdir -p /etc/systemd/system/docker.service.d

echo '
[Service]
Environment="HTTP_PROXY=http://proxy.foo.bar.com:80/"
' | sudo tee /etc/systemd/system/docker.service.d/http-proxy.conf

sudo systemctl daemon-reload
sudo systemctl restart docker