# 加速 docker 镜像下载速度 {#加速-docker-镜像下载速度}

本文讲解如何加速 docker 镜像的下载速度。默认情况下 docker 镜像是从官网下载，有些慢，那么我们可以通过配置国内的镜像地址，来加速镜像的下载速度。常用的国内镜像地址有阿里云、网易、七牛云。

注意: 要求 Docker 客户端版本 > 1.10.0

# 1. 准备镜像地址 {#_1-准备镜像地址}

网易
http://hub-mirror.c.163.com
阿里云
https://<你的 ID>.mirror.aliyuncs.com
登录阿里云平台，访问地址https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors即可看到专属加速地址。
七牛云
https://reg-mirror.qiniu.com
docker中国 https://registry.docker-cn.com
中科大 http://docker.mirrors.ustc.edu.cn

# 2. 配置镜像地址 {#_2-配置镜像地址}

编辑配置文件/etc/docker/daemon.json, 配置镜像地址:

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://iuq5x200.mirror.aliyuncs.com", "https://registry.docker-cn.com", "http://docker.mirrors.ustc.edu.cn", "http://hub-mirror.c.163.com"]
}
EOF

镜像地址可以配置多个。

# 3. 重启 docker 服务 {#_3-重启-docker-服务}

需要重启 docker 服务，镜像地址的配置才会生效。执行如下命令重启 docker 服务:

[root@VM-0-6-centos dockerfile]# systemctl daemon-reload                              
[root@VM-0-6-centos dockerfile]# systemctl restart docker
[root@VM-0-6-centos dockerfile]#

# 4. 验证 {#_4-验证}

执行 docker info 可以查看加速镜像地址是否已生效。
验证过程如下:

[root@VM-0-6-centos mysql]# docker info Client: Debug Mode: false Server: Containers: 1 Running: 1 Paused: 0 Stopped: 0 Images: 30 Server Version: 19.03.13 Storage Driver: overlay2 Backing Filesystem: extfs Supports d_type: true Native Overlay Diff: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 8fba4e9a7d01810a393d5d25a3621dc101981175 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd init version: fec3683 Security Options: seccomp Profile: default Kernel Version: 4.18.0-193.6.3.el8_2.x86_64 Operating System: CentOS Linux 8 (Core) OSType: linux Architecture: x86_64 CPUs: 2 Total Memory: 3.69GiB Name: VM-0-6-centos ID: QNXQ:J3EK:5AWG:JNJK:UU4G:AVKL:LYD4:N5JO:NUUD:6AZV:YO7H:GMLY Docker Root Dir: /data/docker/storage Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false [root@VM-0-6-centos mysql]# systemctl restart docker [root@VM-0-6-centos mysql]# docker info Client: Debug Mode: false Server: Containers: 1 Running: 1 Paused: 0 Stopped: 0 Images: 30 Server Version: 19.03.13 Storage Driver: overlay2 Backing Filesystem: extfs Supports d_type: true Native Overlay Diff: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 8fba4e9a7d01810a393d5d25a3621dc101981175 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd init version: fec3683 Security Options: seccomp Profile: default Kernel Version: 4.18.0-193.6.3.el8_2.x86_64 Operating System: CentOS Linux 8 (Core) OSType: linux Architecture: x86_64 CPUs: 2 Total Memory: 3.69GiB Name: VM-0-6-centos ID: QNXQ:J3EK:5AWG:JNJK:UU4G:AVKL:LYD4:N5JO:NUUD:6AZV:YO7H:GMLY Docker Root Dir: /data/docker/storage Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Registry Mirrors: https://reg-mirror.qiniu.com/ Live Restore Enabled: false

[root@VM-0-6-centos mysql]#

可以看出, docker 镜像加速地址已经配置完毕。