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Handle default kernel cmdline if multiple boot entries for the default kernel are defined #1302

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matejmatuska
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@matejmatuska matejmatuska commented Oct 10, 2024

Instead of erroring out when grubby lists multiple entries for the
default kernel, always use the args= and root= from the first one and create
a post-upgrade report. The report instruct user to ensure those are the
correct ones or to correct them.
This can happen, for example, if MAKEDEBUG=yes is set in
/etc/sysconfing/kernel.

Also the missing leapp.reporting.Report class is added to kernelcmdlineconfig actor produces tuple.

Jira: RHEL-46911

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pirat89 commented Oct 11, 2024

/packit copr-build

pirat89
pirat89 previously approved these changes Oct 16, 2024
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lgtm. note that failed IPU 7 -> 8 tests are invalid.

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pirat89 commented Oct 16, 2024

Tested manually, kind of it works but I found that our solution is not good for such a setup - affecting all major IPU paths.

Reproducer:

# echo "MAKEDEBUG=yes" >> /etc/sysconfig/kernel
# grub2-mkconfig -o /boot/grub2/grub.cfg
# leapp upgrade --debug --reboot

Result

----------------------------------------------------------------------
Actor: kernelcmdlineconfig
Executed: True
Phase: Finalization
Started: 2024-10-16T10:19:10.629165Z
Produced messages:
    - Report
Executed shell commands:
    - ['grubby', '--update-kernel=/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64', '--args', 'net.ifnames=0', '--remove-args', 'enforcing=0']
    - ['grubby', '--info', '/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64']
Logs:
    2024-10-16 12:19:10.689 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: External command has started: ['grubby', '--update-kernel=/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64', '--args', 'net.ifnames=0', '--remove-args', 'enforcing=0']
    2024-10-16 12:19:10.833 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: External command has finished: ['grubby', '--update-kernel=/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64', '--args', 'net.ifnames=0', '--remove-args', 'enforcing=0']
    2024-10-16 12:19:10.834 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: External command has started: ['grubby', '--info', '/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64']
    2024-10-16 12:19:10.943 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: index=0
    2024-10-16 12:19:10.945 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: kernel="/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64"
    2024-10-16 12:19:10.946 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: args="ro crashkernel=auto spectre_v2=retpoline rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet $tuned_params net.ifnames=0"
    2024-10-16 12:19:10.947 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: root="/dev/mapper/rhel-root"
    2024-10-16 12:19:10.948 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: initrd="/boot/initramfs-4.18.0-553.22.1.el8_10.x86_64.img $tuned_initrd"
    2024-10-16 12:19:10.949 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: title="Red Hat Enterprise Linux (4.18.0-553.22.1.el8_10.x86_64) 8.10 (Ootpa)"
    2024-10-16 12:19:10.950 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: id="09f5a67bbdeb46778537162bf6753af2-4.18.0-553.22.1.el8_10.x86_64"
    2024-10-16 12:19:10.957 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: index=1
    2024-10-16 12:19:10.958 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: kernel="/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64"
    2024-10-16 12:19:10.959 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: args="ro crashkernel=auto spectre_v2=retpoline rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet systemd.log_level=debug systemd.log_target=kmsg $tuned_params net.ifnames=0"
    2024-10-16 12:19:10.960 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: root="/dev/mapper/rhel-root"
    2024-10-16 12:19:10.961 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: initrd="/boot/initramfs-4.18.0-553.22.1.el8_10.x86_64.img $tuned_initrd"
    2024-10-16 12:19:10.962 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: title="Red Hat Enterprise Linux (4.18.0-553.22.1.el8_10.x86_64) 8.10 (Ootpa) with debugging"
    2024-10-16 12:19:10.963 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: id="09f5a67bbdeb46778537162bf6753af2-4.18.0-553.22.1.el8_10.x86_64~debug"
    2024-10-16 12:19:10.965 DEBUG    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: External command has finished: ['grubby', '--info', '/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64']
    2024-10-16 12:19:10.966 WARNING  PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: Grubby output is malformed: `root=` is listed more than once.
    2024-10-16 12:19:10.967 WARNING  PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: Grubby output is malformed: `args=` is listed more than once.
    2024-10-16 12:19:10.968 ERROR    PID: 2134 leapp.workflow.Finalization.kernelcmdlineconfig: Grubby listed `args=` multiple times with different values.
    2024-10-16 12:19:10.969 WARNING  PID: 2134 leapp.reporting: Stable Key report entry not provided, dynamically generating one - 91f1a3ce231781b3f55244221551e2d206b28a30
----------------------------------------------------------------------

and in the report:

----------------------------------------
Risk Factor: high
Title: Could not set the kernel arguments for future kernels
Summary: During the upgrade we needed to modify the kernel command line arguments. We were able to change the arguments for the default kernel but we were not able to set the arguments as the default for kernels installed in the future.
Remediation: [hint] After the system has been rebooted into the new version of RHEL, you should take the kernel cmdline arguments from /proc/cmdline (Everything except the BOOT_IMAGE entry and initrd entries) and then use the grub2-editenv command to make them the default kernel args.  For example, if /proc/cmdline contains:

    BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-425.3.1.el8.x86_64 root=/dev/mapper/rhel_ibm--root ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH

 then run the following grub2-editenv command:

    # grub2-editenv - set "kernelopts=root=/dev/mapper/rhel_ibm--root ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH"
Key: 91f1a3ce231781b3f55244221551e2d206b28a30
----------------------------------------

Note that in this case, this has been kind of expected behaviour as the process is expecting to see just one bootloader entry for the target kernel and in case that multiple entries exists, we are not sure which value to set. However, thinking about machines with MAKEDEBUG=yes I guess we could do a simple heuristic, when a second entry is always ignored (debug entries are created as next ones after non-debug entries) e.g. when debug parameter is detected. Also the msg about root= listed multiple times with different values is misleading, as in this case values are same and hence it should not be listed at all - a check for other values is not performed. So thinking about that, I think we should update this solution in this PR, to handle it properly. WDYT @matejmatuska ?

The missing `leapp.reporting.Report` class is added to
kernelcmdlineconfig actor `produces` tuple.
@matejmatuska matejmatuska force-pushed the kernelcmdlineconfig-add-report-to-produce branch from e1807bf to 750ad95 Compare October 18, 2024 10:52
@matejmatuska matejmatuska force-pushed the kernelcmdlineconfig-add-report-to-produce branch 2 times, most recently from df3bc99 to 67f0a47 Compare October 18, 2024 12:44
@matejmatuska matejmatuska changed the title kernelcmdlineconfig: Add Report to produces tuple Handle default kernel cmdline for multiple boot entries Oct 18, 2024
@matejmatuska matejmatuska force-pushed the kernelcmdlineconfig-add-report-to-produce branch from 67f0a47 to 3ae95f4 Compare October 18, 2024 12:49
@matejmatuska matejmatuska changed the title Handle default kernel cmdline for multiple boot entries Handle default kernel cmdline if multiple boot entries for the default kernel Oct 18, 2024
…are listed

Instead of erroring out when grubby lists multiple entries for the
default kernel, always use the `args=` and `root=` from the first one and create
a post-upgrade report. The report instruct user to ensure those are the
correct ones or to correct them.

This can happen, for example, if MAKEDEBUG=yes is set in
/etc/sysconfing/kernel.

Jira: RHEL-46911
@matejmatuska matejmatuska force-pushed the kernelcmdlineconfig-add-report-to-produce branch from 3ae95f4 to 95f9b3e Compare October 18, 2024 12:54
@matejmatuska
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matejmatuska commented Oct 18, 2024

Test results from 8->9:

[root@leapp-20241018165724 ~]# grubby --info=ALL
index=0
kernel="/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet $tuned_params"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-4.18.0-553.22.1.el8_10.x86_64.img $tuned_initrd"
title="Red Hat Enterprise Linux (4.18.0-553.22.1.el8_10.x86_64) 8.10 (Ootpa)"
id="fab6ddf4382e451f8fe707758bb8fd2f-4.18.0-553.22.1.el8_10.x86_64"
index=1
kernel="/boot/vmlinuz-4.18.0-553.22.1.el8_10.x86_64"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet systemd.log_level=debug systemd.log_target=kmsg $tuned_params"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-4.18.0-553.22.1.el8_10.x86_64.img $tuned_initrd"
title="Red Hat Enterprise Linux (4.18.0-553.22.1.el8_10.x86_64) 8.10 (Ootpa) with debugging"
id="fab6ddf4382e451f8fe707758bb8fd2f-4.18.0-553.22.1.el8_10.x86_64~debug"
index=2
kernel="/boot/vmlinuz-4.18.0-553.el8_10.x86_64"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet $tuned_params"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-4.18.0-553.el8_10.x86_64.img $tuned_initrd"
title="Red Hat Enterprise Linux (4.18.0-553.el8_10.x86_64) 8.10 (Ootpa)"
id="fab6ddf4382e451f8fe707758bb8fd2f-4.18.0-553.el8_10.x86_64"
index=3
kernel="/boot/vmlinuz-4.18.0-527.el8.x86_64"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet $tuned_params"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-4.18.0-527.el8.x86_64.img $tuned_initrd"
title="Red Hat Enterprise Linux (4.18.0-527.el8.x86_64) 8.10 (Ootpa)"
id="fab6ddf4382e451f8fe707758bb8fd2f-4.18.0-527.el8.x86_64"
index=4
kernel="/boot/vmlinuz-0-rescue-fab6ddf4382e451f8fe707758bb8fd2f"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-0-rescue-fab6ddf4382e451f8fe707758bb8fd2f.img"
title="Red Hat Enterprise Linux (0-rescue-fab6ddf4382e451f8fe707758bb8fd2f) 8.10 (Ootpa)"
id="fab6ddf4382e451f8fe707758bb8fd2f-0-rescue"
index=5
kernel="/boot/vmlinuz-upgrade.x86_64"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet $tuned_params enforcing=0 plymouth.enable=0 rd.plymouth=0"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-upgrade.x86_64.img"
title="RHEL-Upgrade-Initramfs"
id="fab6ddf4382e451f8fe707758bb8fd2f-upgrade.x86_64"
index=6
kernel="/boot/vmlinuz-upgrade.x86_64"
args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 net.ifnames=0 crashkernel=auto resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet $tuned_params enforcing=0 plymouth.enable=0 rd.plymouth=0 systemd.log_level=debug systemd.log_target=kmsg"
root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
initrd="/boot/initramfs-upgrade.x86_64.img"
title="RHEL-Upgrade-Initramfs with debugging"
id="fab6ddf4382e451f8fe707758bb8fd2f-upgrade.x86_64~debug"
[root@leapp-20241018165724 ~]# leapp upgrade --debug --reboot

From /var/log/leapp/leapp-report.txt

Risk Factor: high
Title: Ensure that expected default kernel cmdline arguments are set
Summary: During the upgrade we needed to modify the kernel command line arguments. However, multiple bootloader entries with different arguments were found for the default kernel (perhaps MAKEDEBUG=yes is set in /etc/sysconfig/kernel). Leapp used the arguments from the first found entry of the target kernel and set it as the new default kernel cmdline arguments for kernels installed in the future.
Remediation: [hint] After the system has been rebooted into the new version of RHEL, check that configured default kernel cmdline arguments in /etc/kernel/cmdline  are correct. In case that different arguments are expected, update the file as needed.

From /var/log/leapp/leapp-upgrade.log:

2024-10-18 15:46:45.952 DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: External command has started: ['grubby', '--info', '/boot/vmlinuz-5.14.0-518.el9.x86_64']
2024-10-18 15:46:46.29  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: index=0
2024-10-18 15:46:46.30  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: kernel="/boot/vmlinuz-5.14.0-518.el9.x86_64"
2024-10-18 15:46:46.31  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet plymouth.enable=0 rd.plymouth=0 crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M $tuned_params net.ifnames=0"
2024-10-18 15:46:46.32  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
2024-10-18 15:46:46.34  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: initrd="/boot/initramfs-5.14.0-518.el9.x86_64.img $tuned_initrd"
2024-10-18 15:46:46.35  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: title="Red Hat Enterprise Linux (5.14.0-518.el9.x86_64) 9.6 (Plow)"
2024-10-18 15:46:46.36  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: id="fab6ddf4382e451f8fe707758bb8fd2f-5.14.0-518.el9.x86_64"
2024-10-18 15:46:46.41  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: index=1
2024-10-18 15:46:46.42  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: kernel="/boot/vmlinuz-5.14.0-518.el9.x86_64"
2024-10-18 15:46:46.43  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: args="ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet plymouth.enable=0 rd.plymouth=0 systemd.log_level=debug systemd.log_target=kmsg crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M $tuned_params net.ifnames=0"
2024-10-18 15:46:46.44  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: root="/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root"
2024-10-18 15:46:46.45  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: initrd="/boot/initramfs-5.14.0-518.el9.x86_64.img $tuned_initrd"
2024-10-18 15:46:46.46  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: title="Red Hat Enterprise Linux (5.14.0-518.el9.x86_64) 9.6 (Plow) with debugging"
2024-10-18 15:46:46.47  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: id="fab6ddf4382e451f8fe707758bb8fd2f-5.14.0-518.el9.x86_64~debug"
2024-10-18 15:46:46.49  DEBUG    PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: External command has finished: ['grubby', '--info', '/boot/vmlinuz-5.14.0-518.el9.x86_64']
2024-10-18 15:46:46.50  WARNING  PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: Grubby output listed `args=` multiple times with different values, continuing with the first result
2024-10-18 15:46:46.52  WARNING  PID: 1851 leapp.workflow.Finalization.kernelcmdlineconfig: Grubby output listed `root=` more than once
[root@leapp-20241018165724 ~]# cat /etc/kernel/cmdline
root=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-root ro console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH biosdevname=0 resume=/dev/mapper/rhel_ibm--p8--kvm--03--guest--02-swap rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/root rd.lvm.lv=rhel_ibm-p8-kvm-03-guest-02/swap rhgb quiet plymouth.enable=0 rd.plymouth=0 crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M $tuned_params net.ifnames=0

@pirat89 pirat89 added this to the 8.10/9.6 milestone Oct 22, 2024
@pirat89 pirat89 added the bug Something isn't working label Oct 22, 2024
@pirat89 pirat89 merged commit c2c96af into oamg:main Oct 22, 2024
24 of 26 checks passed
@pirat89 pirat89 changed the title Handle default kernel cmdline if multiple boot entries for the default kernel Handle default kernel cmdline if multiple boot entries for the default kernel are defined Oct 22, 2024
@pirat89 pirat89 added the changelog-checked The merger/reviewer checked the changelog draft document and updated it when relevant label Oct 22, 2024
@matejmatuska matejmatuska deleted the kernelcmdlineconfig-add-report-to-produce branch October 22, 2024 13:05
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