3.1.1 Updating the Unbreakable Enterprise Kernel

Configure the system to use the Unbreakable Enterprise Kernel Release 5 (UEK R5) or later and boot the system with this kernel. If you are using an earlier Unbreakable Enterprise Kernel (UEK) release, or the Red Hat Compatible Kernel (RHCK), you must upgrade the kernel.

To install or update the UEK:

  1. If your system is registered with ULN, disable access to the ol7_x86_64_UEKR3 and ol7_x86_64_UEKR4 channels, and enable access to the ol7_x86_64_UEKR5 channel.

    Log into https://linux.oracle.com with your ULN user name and password and click on the Systems tab to select the system where you installing Oracle Container Runtime for Docker. Go to the Manage Subscriptions page and update the channel subscriptions for the system. Click on Save Subscriptions to save your changes.

  2. If you use the Oracle Linux yum server, disable the ol7_UEKR3 and ol7_UEKR4 repositories and enable the ol7_UEKR5 repository. You can do this easily using yum-config-manager:

    # yum-config-manager --disable ol7_UEKR3 ol7_UEKR4
    # yum-config-manager --enable ol7_UEKR5
  3. Run the following command to upgrade the system to the selected UEK release:

    # yum update
  4. Reboot the system, selecting the UEK kernel if this is not the default boot kernel.

    # systemctl reboot