RHEL7/Centos7/ local repo from ISO/CentOS-7-x86_64-DVD-1810.iso

[hushui@HikvisionOS mnt]$ sudo mkdir cdrom
[hushui@HikvisionOS mnt]$ sudo mount  -o loop   ~hushui/CentOS-7-x86_64-DVD-1810.iso    /mnt/cdrom/
mount: /dev/loop0 is write-protected, mounting read-only
[hushui@HikvisionOS mnt]$ cd  -
/etc/yum.repos.d
[hushui@HikvisionOS yum.repos.d]$ ls
CentOS-Base.repo  CentOS-Debuginfo.repo  CentOS-Media.repo    CentOS-Vault.repo
CentOS-CR.repo    CentOS-fasttrack.repo  CentOS-Sources.repo  local.repo

[hushui@HikvisionOS yum.repos.d]$ cat  local.repo
# local
#

[local]
name=local
baseurl=file:///mnt/cdrom
gpgcheck=0
gpgkey=file:////mnt/cdrom/RPM-GPG-KEY-CentOS-7
enabled=1
[hushui@HikvisionOS yum.repos.d]$

[hushui@HikvisionOS yum.repos.d]$ sudo  vim   local.repo
[hushui@HikvisionOS yum.repos.d]$ sudo  yum install  glibc.i686
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
local                                                    | 3.6 kB     00:00
(1/2): local/group_gz                                      | 166 kB   00:00
(2/2): local/primary_db                                    | 3.1 MB   00:00
No package glibc.i686 available.
Error: Nothing to do
[hushui@HikvisionOS yum.repos.d]$ sudo  yum install  glibc
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Package glibc-2.17-260.el7.x86_64 already installed and latest version
Nothing to do
[hushui@HikvisionOS yum.repos.d]$ sudo  yum install  glibc.i686
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
No package glibc.i686 available.
Error: Nothing to do