docker 拉取镜像超时：error pulling image configuration: download failed after attempts=6: dial tcp 168.143.

之前是正常的，今天就罢工了，可能原因是国外镜像不稳定，被针对了吧。

error pulling image configuration: download failed after attempts=6: dial tcp 168.143.171.189:443: i/o timeout

那就改为国内镜像：

1.创建/etc/docker目录（已有的跳过）

sudo mkdir -p /etc/docker

2.修改镜像配置文件，改为国内镜像。

sudo tee /etc/docker/daemon.json <<-'EOF'
 
 {
  "registry-mirrors": [
          "https://ox288s4f.mirror.aliyuncs.com",
          "https://registry.docker-cn.com",
          "http://hub-mirror.c.163.com",
          "https://mirror.ccs.tencentyun.com"
  ]
}
 
EOF

3.重启

sudo systemctl daemon-reload
sudo systemctl restart docker

或者

sudo service docker restart

参考：https://blog.csdn.net/mjh1667002013/article/details/140001206