Need to set up yum repository for locally-mounted DVD on Red Hat Enterprise Linux 7 or later

Environment

• Red Hat Enterprise Linux 7

Issue

• How to set up yum repository to use locally-mounted DVD with Red Hat Enterprise Linux (RHEL) 7
• Would like to upgrade server from RHEL 7.x to RHEL 7.y
• Have a secure environment that will never be connected to the internet, but still needs to be updated
• Way to update the packages on server, with no satellite server and servers disconnected from internet
• Offline patches for Red Hat systems
• How do I create a local repository in RHEL 7?

Resolution

Red Hat Enterprise Linux 7

• Mount the RHEL installation ISO to a directory like /mnt, e.g.:
  Raw

  # mount -o loop RHEL7.1.iso /mnt
  

  If you use DVD media , you can mount like below.
  Raw

  # mount /dev/sr0  /mnt
  

Red Hat Enterprise Linux 7

• Copy the media.repo file from the root of the mounted directory to /etc/yum.repos.d/ and set the permissions to 0644 or another similar permissions set:
  Raw

  # cp /mnt/media.repo /etc/yum.repos.d/rhel7dvd.repo
  # chmod 644 /etc/yum.repos.d/rhel7dvd.repo
  

• Edit the new repo file, changing the gpgcheck=0 setting to 1 and adding the following 3 lines
  Raw

  enabled=1
  baseurl=file:///mnt/
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
  

  In the end, the new repo file could look like the following (though the mediaid will be different depending on the version of RHEL):
  Raw

  [InstallMedia]
  name=DVD for Red Hat Enterprise Linux 7.1 Server
  mediaid=1359576196.686790
  metadata_expire=-1
  gpgcheck=1
  cost=500
  enabled=1
  baseurl=file:///mnt/
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
  

Red Hat Enterprise Linux 7

• Clear the related caches by yum clean all and subscription-manager clean using the following:
  Raw

  # yum clean all
  # subscription-manager clean
  

• Check whether you can get the packages list from the DVD repo:
  Raw

  # yum list
  

• If no errors are returned, the following can be used to update:
  Raw

  # yum update