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apt install squid -y

vim /etc/squid/squid.conf

http_port 3128
http_access allow all

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

nano /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://<A的IP>:3128"
Environment="HTTPS_PROXY=http://<A的IP>:3128"
Environment="NO_PROXY=localhost,127.0.0.1"

# 重载并重启 Docker
sudo systemctl daemon-reload
sudo systemctl restart docker

# 验证是否生效
docker info | grep -i proxy

docker pull hello-world