docker设置镜像加速

1，使用以下命令直接从该镜像加速地址进行拉取。
命令：docker pull registry.docker-cn.com/myname/myrepo:mytag
例：docker pull registry.docker-cn.com/library/ubuntu:16.10

注:除非修改了Docker守护进程的–registry-mirror参数,
否则需要完整地指定镜像的名称。例，library/ubuntu、library/redis、library/nginx。

2，使用 --registry-mirror配置Docker守护进程加速。

★临时生效：
Docker守护进程启动时传入 --registry-mirror 参数：
# docker --registry-mirror=https://xxxxxxxx.mirror.aliyuncs.com daemon
★永久生效：
通过配置文件启动Docker,修改/etc/docker/daemon.json 文件并添加上 registry-mirrors 键值。
vim /etc/docker/daemon.json
◆配置镜像加速1：

阿里的镜像地址：https://xxxxxxxx.mirror.aliyuncs.com(私人账号地址)
{
"registry-mirrors": ["https://xxxxxxxx.mirror.aliyuncs.com"]
}

•可以配置多个镜像加速地址，用逗号分隔。
"registry-mirrors":["https://registry.docker.cn.com","https://xxxxxxxx.mirror.aliyuncs.com"]

◆配置镜像加速2：
文档参考：https://www.daocloud.io/mirror
Linux下命令：
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io
{
"registry-mirrors": ["https://xxxxxxxx.m.daocloud.io"]
}

★临时使用：
•使用163的docker仓库，拉取镜像
网易的镜像地址：http://hub.c.163.com
docker pull hub.c.163.com/public/centos:7.2

3，修改保存后，重启Docker以使配置生效。
sudo systemctl daemon-reload
sudo systemctl restart docker

4，查看配置是否生效。
执行docker info，查看是否含有如下信息：
Registry Mirrors:
https://xxxxxxxx.mirror.aliyuncs.com/

5,补充

docker daemon.json的完整配置示例及说明参照：https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-configuration-file

{
	"authorization-plugins": [],
	"data-root": "",
	"dns": [],
	"dns-opts": [],
	"dns-search": [],
	"exec-opts": [],
	"exec-root": "",
	"experimental": false,
	"features": {},
	"storage-driver": "",
	"storage-opts": [],
	"labels": [],
	"live-restore": true,
	"log-driver": "json-file",
	"log-opts": {
		"max-size": "10m",
		"max-file":"5",
		"labels": "somelabel",
		"env": "os,customer"
	},
	"mtu": 0,
	"pidfile": "",
	"cluster-store": "",
	"cluster-store-opts": {},
	"cluster-advertise": "",
	"max-concurrent-downloads": 3,
	"max-concurrent-uploads": 5,
	"default-shm-size": "64M",
	"shutdown-timeout": 15,
	"debug": true,
	"hosts": [],
	"log-level": "",
	"tls": true,
	"tlsverify": true,
	"tlscacert": "",
	"tlscert": "",
	"tlskey": "",
	"swarm-default-advertise-addr": "",
	"api-cors-header": "",
	"selinux-enabled": false,
	"userns-remap": "",
	"group": "",
	"cgroup-parent": "",
	"default-ulimits": {
		"nofile": {
			"Name": "nofile",
			"Hard": 64000,
			"Soft": 64000
		}
	},
	"init": false,
	"init-path": "/usr/libexec/docker-init",
	"ipv6": false,
	"iptables": false,
	"ip-forward": false,
	"ip-masq": false,
	"userland-proxy": false,
	"userland-proxy-path": "/usr/libexec/docker-proxy",
	"ip": "0.0.0.0",
	"bridge": "",
	"bip": "",
	"fixed-cidr": "",
	"fixed-cidr-v6": "",
	"default-gateway": "",
	"default-gateway-v6": "",
	"icc": false,
	"raw-logs": false,
	"allow-nondistributable-artifacts": [],
	"registry-mirrors": [],
	"seccomp-profile": "",
	"insecure-registries": [],
	"no-new-privileges": false,
	"default-runtime": "runc",
	"oom-score-adjust": -500,
	"node-generic-resources": ["NVIDIA-GPU=UUID1", "NVIDIA-GPU=UUID2"],
	"runtimes": {
		"cc-runtime": {
			"path": "/usr/bin/cc-runtime"
		},
		"custom": {
			"path": "/usr/local/bin/my-runc-replacement",
			"runtimeArgs": [
				"--debug"
			]
		}
	},
	"default-address-pools":[
		{"base":"172.80.0.0/16","size":24},
		{"base":"172.90.0.0/16","size":24}
	]
}