备份原文件

cp /etc/docker/daemon.json /etc/docker/daemon.json.bak 2>/dev/null || true

写入新的镜像加速器列表

cat > /etc/docker/daemon.json <<'EOF'
{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://docker.mirrors.ustc.edu.cn",
    "https://mirror.ccs.tencentyun.com"
  ],
  "insecure-registries": [],
  "debug": false
}
EOF

Docker重新加载启动

systemctl daemon-reload
systemctl restart docker

Docker拉取 MySQL 镜像

docker pull mysql:8.0