Chapter 5. Verifying the post-upgrade state of the RHEL 8 system

This procedure lists steps recommended to perform after an in-place upgrade to RHEL 8.

Prerequisites

Procedure

After the upgrade completes, determine whether the system is in the required state, at least:

  • Verify that the current OS version is Red Hat Enterprise Linux 8:

    # cat /etc/redhat-release
    Red Hat Enterprise Linux release 8.2 (Ootpa)
  • Check the OS kernel version:

    # uname -r
    4.18.0-193.el8.x86_64

    Note that .el8 is important.

  • If you are using the Red Hat Subscription Manager:

    • Verify that the correct product is installed:

      # subscription-manager list --installed
      +-----------------------------------------+
          	  Installed Product Status
      +-----------------------------------------+
      Product Name: Red Hat Enterprise Linux for x86_64
      Product ID:   479
      Version:      8.2
      Arch:         x86_64
      Status:       Subscribed
    • Verify that the release version is set to 8.2 immediately after the upgrade:

      # subscription-manager release
      Release: 8.2
    • Ensure your system remains supported after the in-place upgrade. With the general availability of RHEL 8.3, update your system either to RHEL 8.3 or to RHEL 8.2 Extended Update Support (EUS).

      1. Update the system to RHEL 8.3:

        1. Unset Red Hat Subscription Manager to consume the latest RHEL 8.3 content:

          # subscription-manager release --unset
        2. Update your system to the latest RHEL 8.3 version:

          # yum update
      2. Update the system to RHEL 8.2 EUS:

        1. Enable RHEL 8 EUS repositories:

          # subscription-manager repos --enable repository_id1 --enable repository_id2 …

          Replace repository_id* with IDs of EUS repositories available with your subscription. Enable at least the BaseOS and AppStream repositories. For example, on the Intel 64 architecture:

          # subscription-manager repos --enable  rhel-8-for-x86_64-baseos-eus-rpms --enable rhel-8-for-x86_64-appstream-eus-rpms
        2. Update your system to the latest RHEL 8.2.EUS version

          # yum update
  • Verify that network services are operational, for example, try to connect to a server using SSH.
  • Check the post-upgrade status of your applications. In some cases, you may need to perform migration and configuration changes manually. For example, to migrate your databases, follow instructions in RHEL 8 Database servers documentation.