Docker安装

这次老师突然要我帮忙配一下服务器的镜像源，装一下docker。刚好又在CentOS 7.9 生命周期结束EOL的时候，花了1个小时找了些资料+完成任务😃

CentOS 7.9 2009
Xshell 8.0beta（公测）

我从可用镜像源找到了阿里镜像源配置方法，步骤如下（有需要可以配置其他的源）：

切换repo目录，备份镜像源

cd /etc/yum.repo.d/ 

mkdir backup

mv *.repo backup

ls

上述命令执行完毕后应当只有一个backup，我这里是复盘写的文档。

配置阿里源

cat > CentOS-aliyun-lhr.repo << 'EOF'
[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
        http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
 
#released updates 
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
        http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
 
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
        http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
 
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
        http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
 
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
        http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
EOF

配置阿里epel源

cat > epel-aliyun.repo <<'EOF'
[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=http://mirrors.aliyun.com/epel/7/$basearch
failovermethod=priority
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
 
[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=http://mirrors.aliyun.com/epel/7/$basearch/debug
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=0
 
[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=http://mirrors.aliyun.com/epel/7/SRPMS
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=0
EOF

检查验证

yum  clean all
 
yum makecache fast
 
yum install vim lrzsz wget curl net-tools

因为之前已有这些软件，所以现在yum可用后显示Nothing to do

阶段性胜利 Yeah🎉🎉🎉！！！

3. 安装DockerCE

这里我参考了阿里云镜像站的文档

#安装必备软件
sudo yum install -y yum-utils device-mapper-persistent-data lvm2

#添加软件源信息
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

#使用sed命令替换download.docker.com为mirrors.aliyun.com/docker-ce，文件路径在/etc/yum.repos.d/docker-ce.repo
sudo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo

#更新yum并安装dockerce
sudo yum makecache fast
sudo yum -y install docker-ce

#启动docker.service
service docker start

4. 检查是否安装成功

docker version

结果应该会和我一样

拉一个镜像试试

docker pull hello-world

成功

🎊🎊🎊完结撒花🎉🎉🎉

或者

卡住Retrying in 1 second.......

#ip已经处理过了，反正是个IP就对了
[root@localhost docker]# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
2ec76a50fe7c: Retrying in 1 second
fab7f202453a: Retrying in 1 second
ee59ca42def8: Retrying in 1 second
2ce2282f972f: Waiting
d2a9e456ba82: Waiting
b59edc04016d: Waiting
error pulling image configuration: download failed after attempts=6: dial tcp 255.255.255.255:443: connect: connection refused

修改docker源

#切换目录
cd /etc/docker/

#没有这个文件就创建一个，一般应该都有的
vim daemon.json

网上有很多docker源的推荐，我这里选了可用docker镜像的一部分

{
    "registry-mirrors": ["https://dockerhub.icu",
			 "https://mirror.aliyuncs.com",
    			 "https://dockerproxy.com",
    			 "https://mirror.baidubce.com",
    			 "https://docker.m.daocloud.io",
    			 "https://docker.nju.edu.cn"]
}

再次 🎊🎊🎊完结撒花🎉🎉🎉

第一次写文档，感谢观看！！！