Solved LVM issue - Kernel panic Red Hat Linux Enterprise 7.9

<h2>Update notification by Red Hat</h2> Last month we have informed about an important kernel panic case with kernel version greater than 3.10.0-1160.<code>10.1</code>.el7 while using LVM in terms of pvmove command: <blockquote> <a href="https://imagefactory.otc.t-systems.com/home/known-issue-kernel-panic-red-hat-linux-enterprise-7-9">Known LVM issue</a> </blockquote> Red Hat has officially published an update regarding this case which also covers many more known CVEs: <blockquote> <a href="https://access.redhat.com/errata/RHSA-2021:0856">RHSA-2021:0856</a> </blockquote> <div class="notices green"> A new kernel version 3.10.0-1160.<code>21.1</code>.el7 has been released and successfully tested by OTC. </div> <h2>Customer advice</h2> <div class="notices red"> This advice is usually only valid for customers which currently use an existing VM with LVM or plan to use LVM with a new VM! </div> Existing RHEL 7.9 customers with LVM usage We strongly recommend to update your existing environments by executing the following commands: <ol> <li>Login <pre><code>$ ssh username@hostname</code></pre></li> <li>Switch to root <pre><code>$ sudo -i</code></pre></li> <li>Update and check yum updates <pre><code>$ yum clean all $ yum repolist all $ yum check-udpate # ## ### ========================================================================================================================================================================================================================================== Package Arch Version Repository Size ========================================================================================================================================================================================================================================== Installing: kernel x86_64 3.10.0-1160.21.1.el7 rhui-rhel-7-server-rhui-rpms 50 M Updating: cloud-init x86_64 19.4-7.el7_9.4 rhui-rhel-7-server-rhui-rpms 933 k device-mapper x86_64 7:1.02.170-6.el7_9.4 rhui-rhel-7-server-rhui-rpms 297 k device-mapper-event x86_64 7:1.02.170-6.el7_9.4 rhui-rhel-7-server-rhui-rpms 192 k device-mapper-event-libs x86_64 7:1.02.170-6.el7_9.4 rhui-rhel-7-server-rhui-rpms 192 k device-mapper-libs x86_64 7:1.02.170-6.el7_9.4 rhui-rhel-7-server-rhui-rpms 325 k dmidecode x86_64 1:3.2-5.el7_9.1 rhui-rhel-7-server-rhui-rpms 82 k grub2 x86_64 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 34 k grub2-common noarch 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 732 k grub2-pc x86_64 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 34 k grub2-pc-modules noarch 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 858 k grub2-tools x86_64 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 1.8 M grub2-tools-extra x86_64 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 1.0 M grub2-tools-minimal x86_64 1:2.02-0.87.el7_9.6 rhui-rhel-7-server-rhui-rpms 177 k kernel-tools x86_64 3.10.0-1160.21.1.el7 rhui-rhel-7-server-rhui-rpms 8.1 M kernel-tools-libs x86_64 3.10.0-1160.21.1.el7 rhui-rhel-7-server-rhui-rpms 8.0 M lvm2 x86_64 7:2.02.187-6.el7_9.4 rhui-rhel-7-server-rhui-rpms 1.3 M lvm2-libs x86_64 7:2.02.187-6.el7_9.4 rhui-rhel-7-server-rhui-rpms 1.1 M python-perf x86_64 3.10.0-1160.21.1.el7 rhui-rhel-7-server-rhui-rpms 8.1 M redhat-release-server x86_64 7.9-6.el7_9 rhui-rhel-7-server-rhui-rpms 30 k ========================================================================================================================================================================================================================================= ### ## # $ yum update -y</code></pre></li> <li>In some cases a grubby error occurs during kernel upgrade <pre><code>$ grubby fatal error: unable to find a suitable template</code></pre></li> <li>Please check grub configuration file! This must include a new entry for the latest kernel version 3.10.0-1160.<code>21.1</code>.el7 <pre><code>$ cat /boot/grub2/grub.cfg # ## ### menuentry 'Red Hat Enterprise Linux Server (3.10.0-1160.21.1.el7.x86_64) 7.9 (Maipo)' --class fedora --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-simple-d56fc274-de06-499a-959c-c83d53db1fa9' { load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root d56fc274-de06-499a-959c-c83d53db1fa9 else search --no-floppy --fs-uuid --set=root d56fc274-de06-499a-959c-c83d53db1fa9 fi linux16 /boot/vmlinuz-3.10.0-1160.21.1.el7.x86_64 root=LABEL=ROOT ro console=ttyS0,115200n8 console=tty0 net.ifnames=0 root=UUID=d56fc274-de06-499a-959c-c83d53db1fa9 rw LANG=en_US.UTF-8 initrd16 /boot/initramfs-3.10.0-1160.21.1.el7.x86_64.img } ### ## #</code></pre></li> <li>A new grub configuration is required, if the above menu entry was not automatically added. Please reboot! <pre><code>$ grub2-mkconfig -o /boot/grub2/grub.cfg $ reboot</code></pre></li> <li>Check kernel version after reboot. <pre><code>$ uname -r $ 3.10.0-1160.21.1.el7.x86_64</code></pre></li> </ol> New RHEL 7.9 customers which plan to use LVM We strongly recommend to use an image with the following image-id and kernel version 3.10.0-1160.<code>21.1</code>.el7: <blockquote> 6ee08cbf-920b-42d6-8c54-ed779a46410a </blockquote> Or just use our latest Red Hat Enterprise Linux 7.9 image called Enterprise_RedHat_7_latest.