Centos yum中的$releasever和$basearch变量

在Centos中

yum.repos.d下的repo文件，经常能看到$releasever 和 $basearch变量

[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

其中

$releasever 即release version

取值

rpm -qi centos-release

结果中的version字段

[root@router yum.repos.d]# cat /etc/redhat-release 
CentOS Linux release 7.8.2003 (Core) 

[root@router yum.repos.d]# rpm -qi centos-release
Name        : centos-release
Version     : 7
Release     : 8.2003.0.el7.centos
Architecture: x86_64
Install Date: Sat 13 Jun 2020 07:01:32 PM HKT
Group       : System Environment/Base
Size        : 43849
License     : GPLv2
Signature   : RSA/SHA256, Tue 14 Apr 2020 11:54:48 PM HKT, Key ID 24c6a8a7f4a80eb5
Source RPM  : centos-release-7-8.2003.0.el7.centos.src.rpm
Build Date  : Wed 08 Apr 2020 06:01:12 AM HKT
Build Host  : x86-01.bsys.centos.org
Relocations : (not relocatable)
Packager    : CentOS BuildSystem <http://bugs.centos.org>
Vendor      : CentOS
Summary     : CentOS Linux release file
Description :
CentOS Linux release files
[root@router yum.repos.d]# 

此处为version为7

而basearch自然就是架构了

[root@router yum.repos.d]# uname -ip
x86_64 x86_64
[root@router yum.repos.d]# arch
x86_64

$infra 位于 /etc/yum/vars/infra

[root@node-docker yum.repos.d]# cat /etc/yum/vars/infra 
stock