yum is the primary tool for getting, installing, deleting, querying, and managing Red Hat Enterprise Linux RPM software packages from official Red Hat software repositories, as well as other third-party repositories. The post below describes step by step procedure to use a locally mounted RHEL 7 DVD iso as yum repository.
1. Mount the RHEL 7 installation media ISO to some directory. For example /mnt :
# mount -o loop rhel7.iso /mnt
2. Copy the media.repo file from the mounted directory /mnt /etc/yum.repos.d/ and name it as rhel7.repo.
# cp /mnt/media.repo /etc/yum.repos.d/rhel7.repo
3. Give appropriate permissions to the repository file.
# chmod 644 /etc/yum.repos.d/rhel7.repo
4. Modify the repo file and change the parameter gpgcheck=0 to gpgcheck=1 and add below 3 lines to the same file.
enabled=1 baseurl=file:///mnt/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
5. Once you have done all the changes, the final repo file shiould look like below.( Note that – media-id may be different depending on the version of RHEL for which DVD is used)
[InstallMedia] name=DVD for Red Hat Enterprise Linux 7.3 Server mediaid=9859238196.834790 metadata_expire=-1 gpgcheck=1 cost=500 enabled=1 baseurl=file:///mnt/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
6. Make sure you clear the related caches by yum clean all and subscription-manager clean once.
# yum clean all # subscription-manager clean
Verify
Verify if you can list out the packages from the repo you just created.
# yum --noplugins list
# yum repolist -v
[snip]
ISO-Server | 4.1 kB 00:00
(1/2): ISO-Server/group_gz | 134 kB 00:00
(2/2): ISO-Server/primary_db | 3.4 MB 00:00
Setting up Package Sacks
pkgsack time: 0.001
Repo-id : ISO-Server
Repo-name : RHEL 7 Server DVD
Repo-revision: 1424360184
Repo-updated : Thu Feb 19 10:36:27 2017
Repo-pkgs : 4,371
Repo-size : 3.2 G
Repo-baseurl : file:///mnt/
Repo-expire : 21,600 second(s) (last: Fri Jul 10 12:55:47 2017)
Repo-filename: ///etc/yum.repos.d/rhel7.repo
repolist: 4,371