6.3. Upgrading from Red Hat Enterprise Linux 6.X to Red Hat Enterprise Linux 7.X

  1. Install migration tool

    # yum install redhat-upgrade-tool
    # yum install yum-utils
  2. Disable all repositories

    Disable all the enabled repositories:
    # yum-config-manager --disable \*
  3. Download the operating system as an ISO file

    Follow these steps to download the latest ISO file for one of the following operating systems.

    Red Hat Enterprise Linux 7 based Red Hat Gluster Storage 3.5

    1. Visit the Red Hat Customer Service Portal at https://access.redhat.com/login and enter your user name and password to log in.
    2. Click Downloads to go to the Software & Download Center.
    3. Click Red Hat Gluster Storage.
    4. Select 3.5 for RHEL 7 (latest) from the Version dropdown menu.

      Important

      If you are upgrading to Red Hat Gluster Storage 3.5, select version 3.4 for RHEL 7. Bug 1762637 means that the Preupgrade Assistant only allows upgrading to Red Hat Enterprise Linux 7.6 at this time.
    5. Click Download Now beside the Red Hat Gluster Storage Server 3.5 on RHEL 7 Installation DVD.

    Red Hat Enterprise Linux 7

    1. Visit the Red Hat Customer Service Portal at https://access.redhat.com/login and enter your user name and password to log in.
    2. Click Downloads to go to the Software & Download Center.
    3. Click Versions 7 and below, beside Red Hat Enterprise Linux.
    4. Select 7.x (latest) from the Version dropdown menu.

      Important

      If you are upgrading to Red Hat Gluster Storage 3.5, select version 7.6. Bug 1762637 means that the Preupgrade Assistant only allows upgrading to Red Hat Enterprise Linux 7.6 at this time.
    5. Click Download Now beside the Red Hat Enterprise Linux 7.x Binary DVD.
  4. Upgrade to Red Hat Enterprise Linux 7 using ISO

    Upgrade to Red Hat Enterprise Linux 7 using the Red Hat upgrade tool and reboot after the upgrade process is completed:
    # redhat-upgrade-tool --iso ISO_filepath --cleanup-post
    # reboot

    Important

    The upgrade process is time-consuming depending on your system's configuration and amount of data.