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Full Discussion: How to switch back from Oracle Kernel to RedHat?
Operating Systems Linux Red Hat How to switch back from Oracle Kernel to RedHat? Post 303022844 by prvnrk on Saturday 8th of September 2018 11:19:39 AM
Old 09-08-2018
Thanks Neo for your reply.

It's a production machine and what we did was a fresh install of Oracle 12 (not upgrade). I do have backup but restoring backup is going to need me to install/configure Oracle again.

There's no problem with server except for it is running Oracle Kernel instead of Redhat's which resulted the server to become UNsupported (by Redhat). As per our company policy, all machines must be supported by Redhat only.

There're lot of prerequisites to fulfill for Oracle installation on RHEL but Oracle offers an RPM (mentioned above) does it by itself everything but also it also does few extra things like changing RHEL kernel to Oracle, pointing server to Oracle Repositories for future updates etc. Now that its running oracle kernel it is NOT supported by Redhat and I would like to know how can I switch from Oracle kernel to RHEL kernel without breaking anything.


Code:
[root@lnxoraprod02 ~]#   cat /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/mapper/SystemVG-rootLV
#          initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=1
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
password --encrypted $1$d.7ueHQC$Ws5Ng6pSgmuTpWpNMorHT0
title Oracle Linux Server 7.5, with Linux 3.10.0-862.11.6.el7.x86_64
        root (hd0,0)
        kernel /vmlinuz-3.10.0-862.11.6.el7.x86_64 root=/dev/mapper/SystemVG-rootLV ro rd.lvm.lv=SystemVG/swapLV rd.luks=0 KEYBOARDTYPE=pc vconsole.keymap=uk rd.locale.LANG=en_GB.UTF-8 rd.md=0 rd.lvm.lv=SystemVG/rootLV vconsole.font=latarcyrheb-sun16 crashkernel=auto rd.dm=0 rhgb quiet rhgb quiet LANG=en_GB.UTF-8
        initrd /initramfs-3.10.0-862.11.6.el7.x86_64.img
title Oracle Linux Server 7.5, with Unbreakable Enterprise Kernel 4.14.35-1818.0.9.el7uek.x86_64
        root (hd0,0)
        kernel /vmlinuz-4.14.35-1818.0.9.el7uek.x86_64 root=/dev/mapper/SystemVG-rootLV ro rd.lvm.lv=SystemVG/swapLV rd.luks=0 KEYBOARDTYPE=pc vconsole.keymap=uk rd.locale.LANG=en_GB.UTF-8 rd.md=0 rd.lvm.lv=SystemVG/rootLV vconsole.font=latarcyrheb-sun16 crashkernel=auto rd.dm=0 rhgb quiet rhgb quiet LANG=en_GB.UTF-8
        initrd /initramfs-4.14.35-1818.0.9.el7uek.x86_64.img
title Red Hat Enterprise Linux Server (3.10.0-862.9.1.el7.x86_64) 7.5 (Maipo)
        root (hd0,0)
        kernel /vmlinuz-3.10.0-862.9.1.el7.x86_64 root=/dev/mapper/SystemVG-rootLV ro rd.lvm.lv=SystemVG/swapLV rd.luks=0 KEYBOARDTYPE=pc vconsole.keymap=uk rd.locale.LANG=en_GB.UTF-8 rd.md=0 rd.lvm.lv=SystemVG/rootLV vconsole.font=latarcyrheb-sun16 crashkernel=auto rd.dm=0 rhgb quiet rhgb quiet LANG=en_GB.UTF-8
        initrd /initramfs-3.10.0-862.9.1.el7.x86_64.img
title Red Hat Enterprise Linux Server 7.5 Rescue d2d830879078ddddf4d061d50000001f (3.10.0-862.el7.x86_64)
        root (hd0,0)
        kernel /vmlinuz-0-rescue-d2d830879078ddddf4d061d50000001f root=/dev/mapper/SystemVG-rootLV ro rd.lvm.lv=SystemVG/swapLV rd.luks=0 KEYBOARDTYPE=pc vconsole.keymap=uk rd.locale.LANG=en_GB.UTF-8 rd.md=0 rd.lvm.lv=SystemVG/rootLV vconsole.font=latarcyrheb-sun16 crashkernel=auto rd.dm=0 rhgb quiet rhgb quiet LANG=en_GB.UTF-8
        initrd /initramfs-0-rescue-d2d830879078ddddf4d061d50000001f.img
title Red Hat Enterprise Linux Server (3.10.0-862.el7.x86_64) 7.5 (Maipo)
        root (hd0,0)
        kernel /vmlinuz-3.10.0-862.el7.x86_64 root=/dev/mapper/SystemVG-rootLV ro rd.lvm.lv=SystemVG/swapLV rd.luks=0 KEYBOARDTYPE=pc vconsole.keymap=uk rd.locale.LANG=en_GB.UTF-8 rd.md=0 rd.lvm.lv=SystemVG/rootLV vconsole.font=latarcyrheb-sun16 crashkernel=auto rd.dm=0 rhgb quiet rhgb quiet LANG=en_GB.UTF-8
        initrd /initramfs-3.10.0-862.el7.x86_64.img
[root@lnxoraprod02 ~]#  uname -a
Linux lnxoraprod02 4.14.35-1818.0.9.el7uek.x86_64 #2 SMP Mon Jun 18 20:32:24 PDT 2018 x86_64 x86_64 x86_64 GNU/Linux
[root@lnxoraprod02 ~]#  rpm -qa |grep -i ora
python-decorator-3.4.0-3.el7.noarch
oracle-database-server-12cR2-preinstall-1.0-3.el7.x86_64
TDP-Oracle.Utility-7.1.0-0.x86_64
oraclelinux-release-7.5-1.0.5.el7.x86_64
TDP-Oracle-7.1.0-0.x86_64
perl-Storable-2.45-3.el7.x86_64
oracle-logos-70.0.3-4.0.7.el7.noarch
[root@lnxoraprod02 ~]#   rpm -qa |grep -i uek
kernel-uek-4.14.35-1818.0.9.el7uek.x86_64
[root@lnxoraprod02 ~]#

 

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