Proxy Settings for Docker and Nix Daemons

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Docker Daemon Proxy

The Docker daemon checks environment variables in its startup environment.

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According to the official Docker documentation

Create a directory and configuration file for the Docker service:

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

Create /etc/systemd/system/docker.service.d/http-proxy.conf with your proxy settings:

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[Service]
Environment="HTTP_PROXY=http://proxy.example.com:3128"
Environment="HTTPS_PROXY=https://proxy.example.com:3129"
Environment="NO_PROXY=localhost,127.0.0.1,docker-registry.example.com,.corp"

Apply the configuration changes:

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sudo systemctl daemon-reload
sudo systemctl restart docker

Check that the environment variables are properly set:

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sudo systemctl show --property=Environment docker

Nix Daemon Proxy

According to the Nixos CN documentation

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sudo mkdir -p /run/systemd/system/nix-daemon.service.d/

Create /run/systemd/system/nix-daemon.service.d/override.conf with your proxy settings:

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sudo tee /run/systemd/system/nix-daemon.service.d/override.conf << EOF
[Service]
Environment="https_proxy=socks5h://localhost:7891"
EOF

Apply the configuration changes:

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sudo systemctl daemon-reload
sudo systemctl restart nix-daemon

PS

  • The NO_PROXY variable should include local addresses and internal services that shouldn't go through the proxy
  • Different proxy protocols may be required (HTTP, HTTPS, SOCKS5) depending on your network setup