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Overshadowing mount points in /etc/fstab #1009

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merged 4 commits into from
Feb 20, 2023
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@PeterMocary PeterMocary commented Jan 17, 2023

Checks the order of entries in /etc/fstab based on their mount point and inhibits upgrade if overshadowing is detected.

Jira ref.: OAMG#5090
Bugzilla: BZ#1972238

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/rerun

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Copr build succeeded: https://copr.fedorainfracloud.org/coprs/build/5240036

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@pirat89 pirat89 added the bug Something isn't working label Jan 18, 2023
@pirat89 pirat89 added this to the 8.8/9.2 milestone Jan 18, 2023
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Added a fixup commit with slight refactoring, which simplifies the actor a bit.

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/rerun

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Copr build succeeded: https://copr.fedorainfracloud.org/coprs/build/5256565

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Thanks for the unit test! Some open questions / comments inline.

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@pirat89 @fernflower I addressed the issues.

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fernflower previously approved these changes Jan 30, 2023
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All my comments resolved, thanks!

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pirat89 commented Feb 15, 2023

/packit build

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@PeterMocary Following report is confusing:

Risk Factor: high (inhibitor)
Title: Detected incorrect order of entries or duplicate entries in /etc/fstab, preventing a successful in-place upgrade.
Summary: Leapp detected incorrect /etc/fstab format that causes overshadowing of mount points.
Detected order of overshadowing mount points:
/boot,
Remediation: [hint] To prevent the overshadowing:
Reorder the detected overshadowing entries.
Possible order of all mount points without overshadowing:
, none, /boot
Key: fb07b688331fe65635aec13c2a1cb4e86ca6f4dc

Another confusing report is:

Risk Factor: high (inhibitor)
Title: Detected incorrect order of entries or duplicate entries in /etc/fstab, preventing a successful in-place upgrade.
Summary: Leapp detected incorrect /etc/fstab format that causes overshadowing of mount points.
Detected order of overshadowing mount points:
/boot/efi/foo, /boot/efi, /boot
Remediation: [hint] To prevent the overshadowing:
Reorder the detected overshadowing entries.
Possible order of all mount points without overshadowing:
, none, /boot, /boot/efi, /boot/efi/foo
Key: fb07b688331fe65635aec13c2a1cb4e86ca6f4dc

To reproduce the first one, just switch order of lines with / and /boot mountpoints. Here is my sys configuration used for the second report:

root@localhost ~]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Tue Jan 25 12:00:08 2022
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/rhel-root   /                       xfs     defaults        0 0
/dev/something /boot/efi/foo ext4 defaults 0 0
/dev/something /boot/efi ext4 defaults 0 0
UUID=72847225-0df9-419e-8aed-95f385628f02 /boot                   xfs     defaults        0 0
/dev/mapper/rhel-swap   none                    swap    defaults        0 0


[root@localhost ~]# lsblk
NAME          MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda           252:0    0  20G  0 disk 
├─vda1        252:1    0   1G  0 part /boot
└─vda2        252:2    0  19G  0 part 
  ├─rhel-root 253:0    0  17G  0 lvm  /
  └─rhel-swap 253:1    0   2G  0 lvm  [SWAP]

Suggested changes:

  • The rstrip should be skipped in case of / (rootfs).
  • The none output is represented by swap that is not mounted anowhere. in case the mountpoint is not an absolute path, it should be ignored.
  • The intendation is not visible and it's kind of hard to read it. Especially in case of the possible order it's problem. I suggest to use "semi-standardized" way that uses FMT_LIST_SEPARATOR like in checksystemdbrokensymlinks actor. So the report gets better readability. E.g. something like:
Risk Factor: high (inhibitor)
Title: Detected incorrect order of entries or duplicate entries in /etc/fstab, preventing a successful in-place upgrade.
Summary: Leapp detected incorrect /etc/fstab format that causes overshadowing of mount points.
Detected order of overshadowing mount points:
    - /boot/efi/foo
    - /boot/efi
    - /boot
Remediation: [hint] To prevent the overshadowing:
Reorder the detected overshadowing entries.
Possible order of all mount points without overshadowing:
    - /
    - /boot
    - /boot/efi
    - /boot/efi/foo
Key: fb07b688331fe65635aec13c2a1cb4e86ca6f4dc

or you could do simple something like this in case you want to have everything just on one line (but keep in mind that some systems have even tens partitions):

Detected order of overshadowing mount points: /boot/efi/foo, /boot/efi, /boot

in this case even the one line seems good.

  • It's visible the hint is not friendly even with the suggestion above. Currently two hints could be possibly produced and it not so helpful to see something like
Remediation: [hint] To prevent the overshadowing:
Remove detected duplicates by using unique mount points.
Reorder the detected overshadowing entries.
Possible order of all mount points without overshadowing:
    - /
    - /boot
    - /boot/efi
    - /boot/efi/foo

the output seems mixed in this case. What about doing this?

Remediation: [hint] Remove detected duplicates by using unique mount points. Reorder the detected overshadowing entries. Possible order of all mount points without overshadowing:
    - /
    - /boot
    - /boot/efi
    - /boot/efi/foo

in case no duplicates are present, it would look just like this:

Remediation: [hint] Reorder the detected overshadowing entries. Possible order of all mount points without overshadowing:
    - /
    - /boot
    - /boot/efi
    - /boot/efi/foo

both seems to me more readable to be honest. Also you could do something like:

Remediation: [hint] To prevent the overshadowing:
    * Remove detected duplicates by using unique mount points.
    * Reorder the detected overshadowing entries. Possible order of all mount points without overshadowing:
        - /
        - /boot
        - /boot/efi
        - /boot/efi/foo

Also think about the presentation of reports in web UI (cockpit, foreman/satellite), where the readability could be also different. So e.g. the last suggestion, with multiple indentations, could be possibly displayed ignoring leading whitespaces / indentation (not 100% sure about that). So the last one is possibly not so safe for the use.

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Added new fixup commit addressing found issues @pirat89. Thanks for such in depth description!

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Seems good to me know! Great job!

Risk Factor: high (inhibitor)
Title: Detected incorrect order of entries or duplicate entries in /etc/fstab, preventing a successful in-place upgrade.
Summary: Leapp detected incorrect /etc/fstab format that causes overshadowing of mount points.
Detected order of overshadowing mount points: /boot/efi/foo, /boot/efi, /boot, /
Remediation: [hint] To prevent the overshadowing: Reorder the detected overshadowing entries. Possible order of all mount points without overshadowing:
    - /
    - /boot
    - /boot/efi
    - /boot/efi/foo
Key: fb07b688331fe65635aec13c2a1cb4e86ca6f4dc

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pirat89 commented Feb 17, 2023

/rerun

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@pirat89 pirat89 added the changelog-checked The merger/reviewer checked the changelog draft document and updated it when relevant label Feb 17, 2023
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@pirat89 pirat89 merged commit 4316fe9 into oamg:master Feb 20, 2023
pirat89 added a commit to pirat89/leapp-repository that referenced this pull request Feb 21, 2023
## Packaging
- Requires cpio (oamg#979)
- Requires python3-gobject-base, NetworkManager-libnm (oamg#969)
- Bump leapp-repository-dependencies to 9 (oamg#969, oamg#979)

## Upgrade handling
### Fixes
- Add leapp RHUI packages to an allowlist to drop confusing reports (oamg#995)
- Check only mounted XFS partitions (oamg#1027)
- Detect the kernel-core RPM instead of kernel to prevent an error during post-upgrade phases (oamg#1024)
- Disable the amazon-id DNF plugin on AWS during the upgrade stage to omit error messages during the upgrade process caused by missing network connection (oamg#990)
- Do not create new *pyc files when running leapp after the DNF upgrade transaction (oamg#1017)
- Enable upgrades on s390x when /boot is part of rootfs (oamg#991)
- Extend the allow list of RHUI clients by azure-sap-apps to omit confusing report (oamg#974)
- Filter out PES events unrelated for the used upgrade path and handle overlapping events (oamg#1008)
- Fix scan of ceph volumes on systems without ceph-osd (oamg#1011)
- Fix scan of ceph volumes when ceph-osd container is not found (oamg#986)
- Fix systemd symlinks that become incorrect during the IPU (oamg#972)
- Fix the check of memory (RAM) limits (oamg#984)
- Fix the upgrade of IBM Z machines configured with ZFCP (oamg#983)
- Ignore external accounts in /etc/passwd (oamg#958)
- Inhibit the upgrade when entries in /etc/fstab cause overshadowing during the upgrade (oamg#1009)
- Prevent leapp failures caused by re-run of leapp in the upgrade initramfs after previous failure, which causes additional confusing error message hiding original bugs (oamg#996)
- Prevent the upgrade with RHSM when a baseos and an appstream target repositories are not discovered (oamg#1001)
- RHUI(Azure) handle correctly various SAP images (oamg#1037)
- Rework the network configuration handling and parse the configuration data properly (oamg#969)
- Set RHSM release for non-ga and non-beta channels (oamg#1033)
- Use the "grub" library to find the GRUB device (oamg#989)
- [IPU 7 -> 8] Detect corrupted grubenv file (oamg#1012)
- [IPU 7 -> 8] Ensure that rsyncd stays enabled if it is enabled prior the upgrade(oamg#1043)
- [IPU 7 -> 8] Ensure that satellite metapackages are installed after the upgrade (oamg#994)
- [IPU 7 -> 8] Ensure the device_cio_free service stays enabled on s390x after the upgrade (oamg#977)
- [IPU 7 -> 8] Fixed checks for RHEL SAP IPU 7.9 -> 8.6 (oamg#978)
- [IPU 7 -> 8] Fixed migration of ntp to chrony when the ntp service is masked (oamg#966)
- [IPU 7 -> 8] Prevent the traceback during migration of sendmail configuration files when the package is not installed (oamg#1041)
- [IPU 7 -> 8] Satellite: reindex all related databases to fix issues due to new locales in RHEL 8 (oamg#1007, oamg#1018)
- [IPU 7 -> 8] Use the correct domain name in SSSD reports (oamg#1040)
- [IPU 8 -> 9] Added checks for RHEL SAP IPU 8.6 -> 9.0 (oamg#978)
- [IPU 8 -> 9] CheckVDO: Ask user for the confirmation only on failures and undetermined devices (oamg#961)
- [IPU 8 -> 9] Fix the kernel detection during initramfs creation for new kernel on RHEL 9.2+ (oamg#1048)
- [IPU 8 -> 9] Fix the upgrade on Azure using RHUI for SAP Apps images (oamg#975)
- [IPU 8 -> 9] Handle correctly firewalld version 0.8 (oamg#963)

### Enhancements
- Set new upgrade paths (oamg#988):
-- RHEL 7.9 -> 8.8, 8.6 (default: 8.8)
-- RHEL 8.6 -> 9.0
-- RHEL 8.8 -> 9.2
- Check that used leapp data are valid and compatible with the installed leapp-repository (oamg#1003)
- Detect a proxy configuration in YUM/DNF and adjust an error msg on issues caused by the configuration (oamg#914)
- Detect and report systemd symlinks that are broken before the upgrade (oamg#972)
- Drop obsoleted upgrade paths (oamg#1047)
- Improve remediation instructions for packages in unknown repositories (oamg#1010)
- Improve the error message to guide users when discovered more space is needed (oamg#956)
- Introduce --nogpgcheck option to skip checking of RPM signatures (oamg#910)
- Introduced an option to use an ISO file as a target RHEL version content source (oamg#979)
- Introduced possibility to specify what systemd services should be enabled/disabled on the upgraded system (oamg#964)
- Map the target repositories also based on the installed content (oamg#967)
- Provide common information about systemd services (oamg#959)
- Register subscribed systems automatically to Red Hat Insights unless --no-insights-register is used (oamg#1000)
- Remove obsoleted GPG keys provided by RH after the upgrade to prevent errors (oamg#1022)
- Run upgrade process with checking RPM signatures by default (oamg#910, oamg#993, oamg#1025)
- Save breadcrumbs results as RHSM facts (oamg#1002)
- Small improvements in various reports (oamg#1038, oamg#1039, oamg#1032)
- [IPU 8 -> 9] Detect CIFS also when upgrading from RHEL8 to RHEL9 (PR1035)
- [IPU 8 -> 9] Detect RoCE on IBM Z machines and check the configuration is safe for the upgrade (oamg#1030)
- [IPU 8 -> 9] Enable upgrades of RHEL 8 for SAP HANA to RHEL 9 on ppc64le (oamg#1042)
- [IPU 8 -> 9] Improve the handling of blocklisted certificates (oamg#992)

## Additional changes interesting for devels
- Started work on bringing up networking inside the upgrade initramfs - currently available for testing and development purposes when LEAPP_DEVEL_INITRAM_NETWORK is set (oamg#960)
- Add leapp debug tools to the upgrade initramfs - dracut upgrade module (oamg#997)
- Enable disabling of DNF plugins in the dnfplugin library (oamg#990)
@pirat89 pirat89 mentioned this pull request Feb 21, 2023
pirat89 added a commit that referenced this pull request Feb 21, 2023
## Packaging
- Requires cpio (#979)
- Requires python3-gobject-base, NetworkManager-libnm (#969)
- Bump leapp-repository-dependencies to 9 (#969, #979)

## Upgrade handling
### Fixes
- Add leapp RHUI packages to an allowlist to drop confusing reports (#995)
- Check only mounted XFS partitions (#1027)
- Detect the kernel-core RPM instead of kernel to prevent an error during post-upgrade phases (#1024)
- Disable the amazon-id DNF plugin on AWS during the upgrade stage to omit error messages during the upgrade process caused by missing network connection (#990)
- Do not create new *pyc files when running leapp after the DNF upgrade transaction (#1017)
- Enable upgrades on s390x when /boot is part of rootfs (#991)
- Extend the allow list of RHUI clients by azure-sap-apps to omit confusing report (#974)
- Filter out PES events unrelated for the used upgrade path and handle overlapping events (#1008)
- Fix scan of ceph volumes on systems without ceph-osd (#1011)
- Fix scan of ceph volumes when ceph-osd container is not found (#986)
- Fix systemd symlinks that become incorrect during the IPU (#972)
- Fix the check of memory (RAM) limits (#984)
- Fix the upgrade of IBM Z machines configured with ZFCP (#983)
- Ignore external accounts in /etc/passwd (#958)
- Inhibit the upgrade when entries in /etc/fstab cause overshadowing during the upgrade (#1009)
- Prevent leapp failures caused by re-run of leapp in the upgrade initramfs after previous failure, which causes additional confusing error message hiding original bugs (#996)
- Prevent the upgrade with RHSM when a baseos and an appstream target repositories are not discovered (#1001)
- RHUI(Azure) handle correctly various SAP images (#1037)
- Rework the network configuration handling and parse the configuration data properly (#969)
- Set RHSM release for non-ga and non-beta channels (#1033)
- Use the "grub" library to find the GRUB device (#989)
- [IPU 7 -> 8] Detect corrupted grubenv file (#1012)
- [IPU 7 -> 8] Ensure that rsyncd stays enabled if it is enabled prior the upgrade(#1043)
- [IPU 7 -> 8] Ensure that satellite metapackages are installed after the upgrade (#994)
- [IPU 7 -> 8] Ensure the device_cio_free service stays enabled on s390x after the upgrade (#977)
- [IPU 7 -> 8] Fixed checks for RHEL SAP IPU 7.9 -> 8.6 (#978)
- [IPU 7 -> 8] Fixed migration of ntp to chrony when the ntp service is masked (#966)
- [IPU 7 -> 8] Prevent the traceback during migration of sendmail configuration files when the package is not installed (#1041)
- [IPU 7 -> 8] Satellite: reindex all related databases to fix issues due to new locales in RHEL 8 (#1007, #1018)
- [IPU 7 -> 8] Use the correct domain name in SSSD reports (#1040)
- [IPU 8 -> 9] Added checks for RHEL SAP IPU 8.6 -> 9.0 (#978)
- [IPU 8 -> 9] CheckVDO: Ask user for the confirmation only on failures and undetermined devices (#961)
- [IPU 8 -> 9] Fix the kernel detection during initramfs creation for new kernel on RHEL 9.2+ (#1048)
- [IPU 8 -> 9] Fix the upgrade on Azure using RHUI for SAP Apps images (#975)
- [IPU 8 -> 9] Handle correctly firewalld version 0.8 (#963)

### Enhancements
- Set new upgrade paths (#988):
-- RHEL 7.9 -> 8.8, 8.6 (default: 8.8)
-- RHEL 8.6 -> 9.0
-- RHEL 8.8 -> 9.2
- Check that used leapp data are valid and compatible with the installed leapp-repository (#1003)
- Detect a proxy configuration in YUM/DNF and adjust an error msg on issues caused by the configuration (#914)
- Detect and report systemd symlinks that are broken before the upgrade (#972)
- Drop obsoleted upgrade paths (#1047)
- Improve remediation instructions for packages in unknown repositories (#1010)
- Improve the error message to guide users when discovered more space is needed (#956)
- Introduce --nogpgcheck option to skip checking of RPM signatures (#910)
- Introduced an option to use an ISO file as a target RHEL version content source (#979)
- Introduced possibility to specify what systemd services should be enabled/disabled on the upgraded system (#964)
- Map the target repositories also based on the installed content (#967)
- Provide common information about systemd services (#959)
- Register subscribed systems automatically to Red Hat Insights unless --no-insights-register is used (#1000)
- Remove obsoleted GPG keys provided by RH after the upgrade to prevent errors (#1022)
- Run upgrade process with checking RPM signatures by default (#910, #993, #1025)
- Save breadcrumbs results as RHSM facts (#1002)
- Small improvements in various reports (#1038, #1039, #1032)
- [IPU 8 -> 9] Detect CIFS also when upgrading from RHEL8 to RHEL9 (PR1035)
- [IPU 8 -> 9] Detect RoCE on IBM Z machines and check the configuration is safe for the upgrade (#1030)
- [IPU 8 -> 9] Enable upgrades of RHEL 8 for SAP HANA to RHEL 9 on ppc64le (#1042)
- [IPU 8 -> 9] Improve the handling of blocklisted certificates (#992)

## Additional changes interesting for devels
- Started work on bringing up networking inside the upgrade initramfs - currently available for testing and development purposes when LEAPP_DEVEL_INITRAM_NETWORK is set (#960)
- Add leapp debug tools to the upgrade initramfs - dracut upgrade module (#997)
- Enable disabling of DNF plugins in the dnfplugin library (#990)
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