Centos Stream是一个滚动发布的Linux发行版，它介于Fedora Linux的上游开发和RHEL的下游开发之间而存在。可以当成是用来体验最新红帽系Linux特性的一个版本，尝鲜使用。

如果是云上环境还是推荐使用 AliOS 或者 TencentOS 云上企业版操作系统对内核漏洞以及安全防护都是相对稳定

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随之而来的改变是原本拥有 10 年支持的 CentOS 8 将在 2021 年年底结束维护，为其接班的正是 CentOS Stream，CentOS Stream 作为 RHEL 的上游（开发）分支在 CentOS 8 结束维护后会继续更新。因此对于 CentOS 8 用户，如果希望继续获得更新，需要切换到 CentOS Stream。官方也鼓励 CentOS 8 用户迁移至 CentOS Stream。

Centos 迁移到 CentOS Stream

如果yum 源已不可用

  1. # 备份配置
  2. cp -a /etc/yum.repos.d /root/back
  4. # 删除配置
  5. rm -rf /etc/yum.repos.d
  7. # 重新创建
  8. vim /etc/yum.repos.d/CentOS-Base.repo

更新内容如下：

  1. [base]
  2. name=CentOS-8-stream - Base - mirrors.aliyun.com
  3. baseurl=https://mirrors.aliyun.com/centos/8-stream/BaseOS/$basearch/os/
  4. gpgcheck=1
  5. gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
  7. #additional packages that may be useful
  8. [extras]
  9. name=CentOS-8-stream - Extras - mirrors.aliyun.com
  10. baseurl=https://mirrors.aliyun.com/centos/8-stream/extras/$basearch/os/
  11. gpgcheck=1
  12. gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
  14. #additional packages that extend functionality of existing packages
  15. [centosplus]
  16. name=CentOS-8-stream - Plus - mirrors.aliyun.com
  17. baseurl=https://mirrors.aliyun.com/centos/8-stream/centosplus/$basearch/os/
  18. gpgcheck=1
  19. enabled=0
  20. gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
  22. [PowerTools]
  23. name=CentOS-8-stream - PowerTools - mirrors.aliyun.com
  24. baseurl=https://mirrors.aliyun.com/centos/8-stream/PowerTools/$basearch/os/
  25. gpgcheck=1
  26. enabled=0
  27. gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
  29. [AppStream]
  30. name=CentOS-8-stream - AppStream - mirrors.aliyun.com
  31. baseurl=https://mirrors.aliyun.com/centos/8-stream/AppStream/$basearch/os/
  32. gpgcheck=1
  33. gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

然后在执行更新命令

  1. # 清理缓存
  2. yum clean all
  3. yum makecache

升级到Centos Stream

  1. # 安装centos-stream
  2. dnf install -y centos-release-stream
  4. # 切换内核
  5. dnf swap centos-linux-repos centos-stream-repos
  7. # 更新软件
  8. dnf distro-sync
  10. # 查看配置
  11. cat /etc/centos-release
  12. # CentOS Stream release 8
  14. # 更新
  15. yum update