centos7配置Docker镜像加速器

创建并编辑文件

[root@localhost ~]# cd /etc/docker/
[root@localhost docker]#
[root@localhost docker]# ls
key.json
[root@localhost docker]#

# vi daemon.json

[root@localhost docker]# pwd
/etc/docker
[root@localhost docker]#
[root@localhost docker]# cat daemon.json
{
  "registry-mirrors": ["https://hub.daocloud.io"]
}

或者

https://almtd3fa.mirror.aliyuncs.com为阿里云的加速地址。修改后，重启docker

{
  "registry-mirrors": ["https://almtd3fa.mirror.aliyuncs.com"]
}

重启服务

# systemctl daemon-reload

# systemctl restart docker.service

验证：
# docker info

[root@localhost docker]# docker info
Client:
 Debug Mode: false

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 19.03.1
 Storage Driver: overlay2
  Backing Filesystem: xfs
  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: 894b81a4b802e4eb2a91d1ce216b8817763c29fb
 runc version: 425e105d5a03fabd737a126ad93d62a9eeede87f
 init version: fec3683
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-862.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 31.26GiB
 Name: localhost.localdomain
 ID: PWEZ:N4ZR:KMJC:EGZ7:EAPB:MU7P:OA5U:42IT:3HI3:7QU6:WL2J:FKKT
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://hub.daocloud.io/
 Live Restore Enabled: false

参考文章：

CoreOS配置Docker镜像加速器更靠谱的方法

https://yq.aliyun.com/articles/622254?spm=5176.10695662.1996646101.searchclickresult.39e63908A9XO6Z

Docker 镜像加速器

https://yq.aliyun.com/articles/29941?spm=5176.10695662.1996646101.searchclickresult.39e63908A9XO6Z