Centos7安装docker、docker-compose实践过程

yum list installed | grep docker

systemctl status docker  #查询docker状态

systemctl stop docker  #停止docker

#删除命令如下
yum -y remove containerd.io.x86_64 \ docker-buildx-plugin.x86_64 \ docker-ce.x86_64 \ docker-ce-cli.x86_64 \ docker-ce-rootless-extras.x86_64 \ docker-compose-plugin.x86_64

#删除docker相关软件包
yum remove -y docker*

rm -rf /var/lib/docker  #删除/var/lib下的docker文件夹

#安装yum-utils工具
yum install -y yum-utils device-mapper-persistent-data lvm2  

Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误"


 One of the configured repositories failed (未知),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

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

yum list docker-ce --showduplicates | sort -r

yum install -y docker-ce-26.0.2-1.el7 docker-ce-cli-26.0.2-1.el7 containerd.io

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

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

systemctl start docker

systemctl stop docker

systemctl stop docker.socket

systemctl status docker

systemctl enable docker

# 下载Docker Compose二进制文件
sudo curl -L "https://github.com/docker/compose/releases/download/v2.3.3/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

# 赋予执行权限
sudo chmod +x /usr/local/bin/docker-compose

chmod +x /usr/local/bin/docker-compose

docker-compose version