查看系统版本

uname -r

name -m

yum update -y

报错

 

更改yum源

 确保源已配置

ls /etc/yum.repos.d/

 

 

修改源配置

vi /etc/yum.repos.d/CentOS-Base.repo

 

 

name=CentOS-$releasever - Base

baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

请确保下面这行被注释掉（在前面加上#）

# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra

yum clean all

yum makecache

 

 

报错443端口

备份当前配置

cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

 

修改协议为 HTTP

sed -i 's|https://mirrors.aliyun.com|http://mirrors.aliyun.com|g' /etc/yum.repos.d/CentOS-Base.repo

 

或者直接备份旧的配置

cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

然后创建一个新的

vi /etc/yum.repos.d/CentOS-Base.repo

 

内容如下：

# CentOS-Base.repo

#

# The mirror system uses the connecting IP address of the client and the

# update status of each mirror to pick mirrors that are updated to and

# geographically close to the client.  You should use this for CentOS updates

# unless you are manually picking other mirrors.

#

# If the mirrorlist= does not work for you, as a fall back you can try the

# remarked out baseurl= line instead.

#

#

 

[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

 

然后yum安装

yum install -y docker

 

启动docker和加自启动

 

安装成功了，但功能不完整。无法从Docker Hub拉取镜像

 

# 创建配置目录

sudo mkdir -p /etc/docker

 

# 配置镜像加速器（使用国内镜像源）（红色那条测试可用的）

sudo tee /etc/docker/daemon.json <<-'EOF'

{

  "registry-mirrors": [

    “https://docker.1ms.run”

    "https://hub-mirror.c.163.com",

    "https://mirror.baidubce.com",

    "https://docker.mirrors.ustc.edu.cn"

  ]

}

EOF

 

 

 

国内大部分镜像都不行了只有腾讯的可以用

docker pull registry.cn-hangzhou.aliyuncs.com/library/alpine:latest

docker tag registry.cn-hangzhou.aliyuncs.com/library/alpine:latest alpine

docker run alpine echo

 

 

建立自己的镜像拉取流程

cat > /usr/local/bin/dpull << 'EOF'

#!/bin/bash

IMAGE=$1

docker pull ccr.ccs.tencentyun.com/library/${IMAGE}

docker tag ccr.ccs.tencentyun.com/library/${IMAGE} ${IMAGE}

EOF

 

chmod +x /usr/local/bin/dpull

使用示例

dpull nginx

dpull redis

dpull mysql

 

 测试常用镜像是否可用

for image in nginx redis mysql:5.7 alpine centos:7; do

  echo "测试拉取 $image ..."

  docker pull ccr.ccs.tencentyun.com/library/$image 2>/dev/null && \

    echo "✅ $image 可用" || echo "❌ $image 不可用"

done