Linux 安装 docker 以及Centos8安装报错解决

1、装卸旧版本docker

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

2、安装gcc

yum -y install gcc
yum -y install gcc-c++

此时可能会出现报错如下 Errors during downloading metadata for repository 'AppStream':- Status code: 404 for mirrors.cloud.aliyuncs.com/centos/8/Ap… (IP: 100.100.2.148) Error: Failed to download metadata for repo 'AppStream': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried 问题原因：由于centos8官方已经停止提供服务，相应的yum源也已经移到归档源 解决办法： 1、运行以下命令备份之前的repo文件。

rename '.repo' '.repo.bak' /etc/yum.repos.d/*.repo

2、运行以下命令下载最新的repo文件

wget https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo -O /etc/yum.repos.d/Centos-vault-8.5.2111.repo wget https://mirrors.aliyun.com/repo/epel-archive-8.repo -O /etc/yum.repos.d/epel-archive-8.repo

3、运行以下命令替换repo文件中的链接

sed -i 's/mirrors.cloud.aliyuncs.com/url_tmp/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo && sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo && sed -i 's/url_tmp/mirrors.aliyun.com/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/epel-archive-8.repo

4、运行以下命令重新创建缓存

yum clean all
yum makecache

重新执行第二步

3、安装yum-utils和stable repository

yum install -y yum-utils
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

4、安装最新版本的 Docker Engine 和 containerd

yum install docker-ce docker-ce-cli containerd.io

6、启动docker

systemctl start docker

开机自启docker : systemctl enable docker

7、查看docker版本信息

docker version

8、卸载

systemctl stop docker
yum remove docker-ce docker-ce-cli containerd.io
rm -rf /var/lib/docker
rm -rf /var/lib/containerd