centos7: How docker uses Alibaba Cloud Image Accelerator

The download speed of docker hub is very slow, but you can use Alibaba Cloud docker accelerator to improve the speed, manage your images and pull other people's images

1. First you have to have an Ali account

2. Then enter the image acceleration page , and you will see an accelerator address given by Alibaba Cloud

   

3. Then select the corresponding system and perform the corresponding steps according to your own docker version

• Check the docker version: docker --version

[root@106 ~]# docker --version
Docker version 17.12.1-ce, build 7390fc6
[root@106 ~]# 

• Different versions of docker:
  • Users with docker client version greater than 1.10
    • Accelerators can be used through the fat daemon configuration file /etc/docker/daemon.json

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://dhq9bx4f.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

• Users with Docker client version less than or equal to 1.10
  • Or to configure the startup parameters, you can use the following command to add the configuration to the startup parameters of the docker daemon.
• System requirements CentOS 7 or above, Docker 1.9 or above

sudo cp -n /lib/systemd/system/docker.service /etc/systemd/system/docker.service

• Docker versions below 1.12 use the docker daemon command

sudo sed -i "s|ExecStart=/usr/bin/docker daemon|ExecStart=/usr/bin/docker daemon --registry-mirror=加速器地址|g" /etc/systemd/system/docker.service

• Docker 1.12 and above use the dockerd command

sudo sed -i "s|ExecStart=/usr/bin/dockerd|ExecStart=/usr/bin/dockerd --registry-mirror=加速器地址|g" /etc/systemd/system/docker.service
sudo systemctl daemon-reload
sudo service docker restart

• test

[root@106 ~]# docker pull centos
Using default tag: latest
latest: Pulling from library/centos
5e35d10a3eba: Pull complete 
Digest: sha256:dcbc4e5e7052ea2306eed59563da1fec09196f2ecacbe042acbdcd2b44b05270
Status: Downloaded newer image for centos:latest
[root@106 ~]# 

4. You can add accelerated parameters to the docker startup item and restart the docker service

echo "DOCKER_OPTS=\"\$DOCKER_OPTS --registry-mirror=你的加速地址\"" | sudo tee -a /etc/default/docker
sudo service docker restart

5. If the docker version is too low, you can upgrade the next version

curl -sSL http://acs-public-mirror.oss-cn-hangzhou.aliyuncs.com/docker-engine/internet | sh -

6. You can search for the mirror you need on the Ali website, link , and then click on the details to view the relevant information of the mirror