Upgrading the host OS from Red Hat Enterprise Linux 6.x to 7.x

If you installed Unified Manager on a Red Hat Enterprise Linux 6.x system and want to upgrade to Red Hat Enterprise Linux 7.x, you must follow a specific process. You must create a backup of Unified Manager on the Red Hat Enterprise Linux 6.x system, and then restore the backup onto a new Red Hat Enterprise Linux 7.x system.

Before you begin

You must have a server on which you can install Red Hat Enterprise Linux 7.x and the Unified Manager software.

About this task

Because this task requires that you create a backup of Unified Manager on the Red Hat Enterprise Linux 6.x system, you should create the backup only when you are prepared to complete the entire upgrade process, so that Unified Manager is offline for the shortest period of time. Gaps in collected data will appear in the Unified Manager UI for the period of time during which the Red Hat Enterprise Linux 6.x system is shut down and before the new Red Hat Enterprise Linux 7.x is started.

Steps

  1. Install and configure a new server with Red Hat Enterprise Linux 7.x software.
  2. On the Red Hat Enterprise Linux 7.x system, install the same version of the Unified Manager software that you have on the existing Red Hat Enterprise Linux 6.x system.
    Do not launch the UI or configure any clusters, users, or authentication settings when the installation is complete. The backup file populates this information during the restore process.
  3. On the Red Hat Enterprise Linux 6.x system, from the Administration menu in the web UI, create a backup of Unified Manager database, and then copy the backup file to an external location.
  4. On the Red Hat Enterprise Linux 6.x system, shut down Unified Manager.
  5. On the Red Hat Enterprise Linux 7.x system, copy the backup file from the external location to /data/ocum-backup/, and then enter the following command to restore the Unified Manager database from the backup file:um backup restore -f /opt/netapp/data/ocum-backup/<backup_file_name>

After you finish

You can enter the IP address or URL into a supported web browser to start the Unified Manager web UI, and then log in to the system.