Error “Get https://registry-1.docker.io/v2/: net/http: request canceled” while building image

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I think the issue is that you are behind the proxy which in which case you need to write a manual configuration in Docker systemd service file. That will override the default docker.service file.

If you are using Docker for Windows, then simply set the default DNS to 8.8.8.8 on the “vEthernet (DockerNAT)” network adapter. But remember, this is not the best practice as you will be exposing from your office network.

In linux environment, you could add the environment variable as you are behind HTTP_PROXY or HTTPS_PROXY, as you are using port 80 or 443 respectively. As shown below in /etc/systemd/system/docker.service.d/http-proxy.conf

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

as for HTTTP_PROXY in /etc/systemd/system/docker.service.d/https-proxy.conf

[Service]
Environment="HTTPS_PROXY=https://proxy.example.com:443/"

Then just restart docker after deamon reload:

 $ sudo systemctl daemon-reload
 $ sudo systemctl restart docker

Hope this works.

Reference: https://docs.docker.com/engine/admin/systemd/#httphttps-proxy

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