安装mysql的时候执行命令：
[root@localhost yum.repos.d]# yum install mysql-community-server 已加载插件：fastestmirror base | 3.6 kB 00:00:00 extras | 2.9 kB 00:00:00 http://dl.google.com/linux/chrome/rpm/stable/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: dl.google.com; 未知的错误" 正在尝试其它镜像。 One of the configured repositories failed (google-chrome), 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. Disable the repository, 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 google-chrome 4. 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=google-chrome.skip_if_unavailable=true failure: repodata/repomd.xml from google-chrome: [Errno 256] No more mirrors to try. http://dl.google.com/linux/chrome/rpm/stable/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: dl.google.com; 未知的错误"
我的解决办法，删除掉 /etc/yum.repos.d/ 目录下关于google-chrome的文件
-rw-r--r--. 1 root root 1664 9月 5 21:05 CentOS-Base.repo -rw-r--r--. 1 root root 1309 9月 5 21:05 CentOS-CR.repo -rw-r--r--. 1 root root 649 9月 5 21:05 CentOS-Debuginfo.repo -rw-r--r--. 1 root root 314 9月 5 21:05 CentOS-fasttrack.repo -rw-r--r--. 1 root root 630 9月 5 21:05 CentOS-Media.repo -rw-r--r--. 1 root root 1331 9月 5 21:05 CentOS-Sources.repo -rw-r--r--. 1 root root 6639 9月 5 21:05 CentOS-Vault.repo -rw-r--r--. 1 root root 173 12月 16 10:52 google-chrome.repo.bak -rw-r--r--. 1 root root 1838 4月 27 2017 mysql-community.repo -rw-r--r--. 1 root root 1885 4月 27 2017 mysql-community-source.repo
再重新执行安装命令即可。