docker 学习第一篇 Linux 安装docker

1、下载docker ，下载地址https://docs.docker.com/engine/install/centos/

2、卸载旧的docker，

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sudo yum remove docker \                  docker-client \                  docker-client-latest \                  docker-common \                  docker-latest \                  docker-latest-logrotate \                  docker-logrotate \                  docker-engine

　3、

Set up the repository

Install the yum-utils package (which provides the yum-config-manager utility) and set up the repository.

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sudo yum install -y yum-utils sudo yum-config-manager \    --add-repo \    https://download.docker.com/linux/centos/docker-ce.repo<br><br>替换成阿里云镜像

sudo yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

　　

记录解决yum报错：Cannot retrieve metalink for repository: epel/x86_64

解决方法可以试试修改“/etc/yum.repos.d”文件夹中的“epel.repo”文件。修改内容如下：

 

我们只需要把“metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch”前面加“#”号注释掉，并且把“#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch”取消注释！修改如下即可，一般这个问题就能得到解决了。

 

 

4、安装镜像  

 sudo yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin  

5、启动docker

 sudo systemctl start docker

6、检查版本

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1	docker  version

　　

 

 

7、运行镜像

 sudo docker run hello-world

 

 

8、设置阿里云镜像加速器

https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors

 

 

 

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://5yfoi1k1.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

 

11、常见错误

Docker Unable to load the service index for source https://api.nuget.org/v3/index.json

1、解决方案从新安装docker

2、安装证书等等一大堆

Get "https://mcr.microsoft.com/v2/": x509: certificate signed by unknown authority

1、安装证书
yum install ca-certificates
2、更新证书
update-ca-trust enable