[root@localhost ~]# yum install gcc-c++ gcc make cmake zlib-devel bzip2-devel openssl-devel ncurse-devel libffi-devel -y
^CDocker CE Stable - x86_64 [ === ] --- B/s | 0 B --:-- ETDocker CE Stable - x86_64 0.0 B/s | 0 B 00:24
Errors during downloading metadata for repository 'docker-ce-stable':
- Curl error (28): Timeout was reached for https://download.docker.com/linux/centos/9/x86_64/stable/repodata/repomd.xml [Failed to connect to download.docker.com port 443: 连接超时]
错误：为仓库 'docker-ce-stable' 下载元数据失败 : Librepo was interrupted by a signal
这可能是由于YUM配置文件中包含了Docker仓库的配置，或者您的yum源中包含了Docker的相关依赖。您可以尝试以下步骤解决问题：
1. 查看YUM配置： 查看 `/etc/yum.repos.d/` 目录下是否有与Docker相关的repo文件，如`docker.repo`或`docker-ce.repo`，并临时移除或注释掉相关配置。
本人通过查看`/etc/yum.repos.d/` 目录，发现有docker-ce.repo，打开
1 [docker-ce-stable]
2 name=Docker CE Stable - $basearch
3 baseurl=https://download.docker.com/linux/centos/$releasever/$basearch/stable
4 enabled=1
5 gpgcheck=1
6 gpgkey=https://download.docker.com/linux/centos/gpg
7
8 [docker-ce-stable-debuginfo]
9 name=Docker CE Stable - Debuginfo $basearch
10 baseurl=https://download.docker.com/linux/centos/$releasever/debug-$basearch/stable
11 enabled=0
12 gpgcheck=1
13 gpgkey=https://download.docker.com/linux/centos/gpg
14
15 [docker-ce-stable-source]
16 name=Docker CE Stable - Sources
17 baseurl=https://download.docker.com/linux/centos/$releasever/source/stable
18 enabled=0
19 gpgcheck=1
20 gpgkey=https://download.docker.com/linux/centos/gpg
21
22 [docker-ce-test]
23 name=Docker CE Test - $basearch
24 baseurl=https://download.docker.com/linux/centos/$releasever/$basearch/test
发现第4行，enabled=1，其他都是0，将其改为0，解决
原文链接：https://blog.csdn.net/chr35/article/details/139789558