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How To Upgrade a Kernel on BDA V4.2 and Higher/V4.1 (Doc ID 2033797.1)

Last updated on JUNE 28, 2024

Applies to:

Big Data Appliance Integrated Software - Version 4.2.0 and later
Linux x86-64

Goal

Detail how to upgrade the Kernel on BDA V4.2 and higher and BDA V4.1.  The only difference between the BDA V4.2 and higher versions  and BDA V4.1 is that on BDA V4.2 and higher 'reset-grub-conf' is on the BDA.  On BDA V4.1 download the attached BDA V4.2-4.4 'reset-grub-conf' to any staging directory on the BDA and execute it from there.

Note: This important information for UEK4 Kernels:

1. BDA now supports  UEK4QU6  (for example: 4.1.12-112.*) on all BDA UEK4 versions.  The recommendation for UEK4 kernel upgrades is to upgrade to the latest UEK4QU6 in public yum. To find the latest UEK4QU6 kernel for upgrade on the BDA follow: How to Find the Latest UEK4 Kernel in the Oracle Linux Public Yum Repository Recommended for Kernel Upgrade on the BDA (2469523.1).

2. For BDA V4.7.0-4.9.0 going to a UEK4 QU5 kernel is NOT supported. For BDA V4.10.0 and V4.11.0 UEK4 QU5 (4.1.12-103*) is supported.  But the recommendation is to upgrade to UEK4QU6 on UEK4.  To check what that version currently is follow: How to Find the Latest UEK4 Kernel in the Oracle Linux Public Yum Repository Recommended for Kernel Upgrade on the BDA (2469523.1).

3. There is a known issue on OL6 with UEK4 kernels higher than UEK 4.1.12-70 and lower than UEK 4.1.12-94.3.9 such that a network restart ("service network restart") causes a crash and a node reboot. Do not upgrade to a UEK4 kernel lower than UEK 4.1.12-94.3.9 - see also DocID 2296538.1 Recommended Kernel and Firmware Versions After Upgrade to BDA V4.7, BDA V4.8, BDA V4.9.

5. X7 and X8 servers will behave the same with respect to kernel upgrades - both are EFI based.

Also note:

1. Many steps in this MOS note are provided using dcli to implement them on all cluster nodes.  The steps can be run individually on one server at a time without dcli as well.  

2. The example in this note uses upgrade to kernel-uek-*4.1.12-112*.  Replace the version, e.g. 4.1.12-112, as appropriate with the latest kernel being upgraded to.

Solution

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In this Document
Goal
Solution
 Known Issues
 Frequently Asked Questions - General
 Frequently Asked Questions - For Installing the Latest "Oracle Linux 6 Extended Lifecycle Support (ELS) Unbreakable Enterprise" on the BDA
 Kernel Upgrade Prerequisites
 Prerequisites for UEK4 Upgrades on X7/X8 Servers - Confirm /etc/fstab is Correct
 Prerequisites for UEK4 Kernel Upgrades on X6 and Lower Servers on OL7 Which have been Migrated from OL6 to OL7
 Space Requirements
 Make sure the Cluster is Healthy
 Prerequisites for proxies
 Prerequisites for /etc/yum.repos.d/public-yum-ol<X>.repo
 Prerequisites for /etc/yum.conf
 Shutdown Services in CM for Non-Rolling kernel Upgrades
 Kernel Upgrade Steps
 For UEK2
 For UEK4
 For UEK4/Background
 For UEK4/Steps for OL7 UEK4 Kernel Upgrades
 For UEK4/Steps for all UEK4 Kernel Upgrades
References

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