Docker Hub 镜像加速器

国内从 Docker Hub 拉取镜像有时会遇到困难，此时可以配置镜像加速器。Docker 官方和国内很多云服务商都提供了国内加速器服务。

Ubuntu 16.04+、Debian 8+、CentOS 7+

创建或修改 /etc/docker/daemon.json：

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
    "registry-mirrors": [
        "https://1nj0zren.mirror.aliyuncs.com",
        "https://docker.mirrors.ustc.edu.cn",
        "http://f1361db2.m.daocloud.io",
        "https://registry.docker-cn.com"
    ]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

命令行执行 docker info，如果从结果中看到了如下内容，说明配置成功。

Registry Mirrors:
 [...]
 https://registry.docker-cn.com/

使用镜像前后，可使用 time 统计所花费的总时间。测速前先移除本地的镜像！

$ docker rmi node:latest
$ time docker pull node:latest
Pulling repository node
[...]

real   1m14.078s
user   0m0.176s
sys    0m0.120s

• https://docs.docker.com/registry/recipes/mirror/
• https://github.com/yeasy/docker_practice/blob/master/install/mirror.md
• https://github.com/moby/moby/blob/d409b05970e686993e343d226fae5b463d872082/docs/articles/registry_mirror.md
• https://fengbohello.top/archives/docker-registry-mirror
• https://ilanni.com/?p=14534
• https://y0ngb1n.github.io/a/docker-registry-mirrors.html