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 environment variable:

[Service]
Environment="HTTP_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="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/

Restart Docker:

$ sudo systemctl restart docker</code>


<strong>方法 二</strong></pre>
On CentOS the configuration file for Docker is at:
<blockquote><code>/etc/sysconfig/docker</code></blockquote>
Adding the below line helped me to get the Docker daemon working behind a proxy server:
<pre><code>HTTP_PROXY="http://&lt;proxy_host&gt;:&lt;proxy_port&gt;"
HTTPS_PROXY="http://&lt;proxy_host&gt;:&lt;proxy_port&gt;"</code>
export <code>HTTP_PROXY</code> <code>HTTPS_PROXY