Bug 1836094

It's likely this applies to Fedora Rawhide guests as well.  Both
now use a different RPM database (sqlite for Rawhide, not sure about SUSE)
so we need to use librpm in order to process the database instead
of assuming they're all using BDB.

Bulk update: Move RHEL-AV bugs to RHEL9. If necessary to resolve in RHEL8, then clone to the current RHEL8 release.

I retested this issue and it was fixed on RHEL9. See this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1935181. Due to this issue, on RHEL8 virt-inspector also fails to detect the rhel-guest-image-9.0-xxx.qcow2. (I see we don't support handling RHEL n+1 image on RHEL n officially)

On rhel8.6 bare metal:
# virt-inspector -a rhel-guest-image-9.0-20210906.7.x86_64.qcow2
libguestfs: error: filesize: /var/lib/rpm/Name: No such file or directory

If there is a plan to fix this issue on RHEL8, maybe we should revert this bug to RHEL8 again. Otherwise, we can close it.

Let's move this back to RHEL 8.  It should be possible to
backport this fix.

(In reply to Richard W.M. Jones from comment #5)
> Let's move this back to RHEL 8.  It should be possible to
> backport this fix.

Okay, thanks.

Packages installed:
libvirt-6.0.0-37.module+el8.5.0+12162+40884dd2.ppc64le
qemu-kvm-4.2.0-58.module+el8.5.0+12272+74ace547.ppc64le
libguestfs-tools-c-1.40.2-28.module+el8.5.0+10717+67be7ac4.ppc64le
kernel-4.18.0-344.el8.ppc64le

RHEL 9.0 guest compose: http://download-node-02.eng.bos.redhat.com/rhel-9/composes/RHEL-9/RHEL-9.0.0-20210924.5

libvirt need to test RHEL 9.0 PPC guest installation on a RHEL 8.5 PPC host . 
The command we use to verify the installed guest is working normally. But it failed while I can start the guest using this image and log on and operate normally within the guest.

# virt-sysprep -a /var/lib/libvirt/images/image-builder3.qcow2 --run-command 'echo > /etc/machine-id'
 [   0.0] Examining the guest ...
virt-sysprep: error: no operating systems were found in the guest image 
If reporting bugs, run virt-sysprep with debugging enabled and include the 
complete output:

  virt-sysprep -v -x [...]



Dan Zheng
Libvirt QE

Can you add -v -x options to find out what the real problem is.

However one issue is going to be that examining RHEL > n guest using RHEL = n
host is not supported.

Verified with package:
libguestfs-1.44.0-4.module+el8.6.0+12969+f61072d9.x86_64


Steps:

1. On rhel8.6 host
# virt-inspector -a rhel-guest-image-9.0-20211014.7.x86_64.qcow2
<?xml version="1.0"?>
<operatingsystems>
  <operatingsystem>
    <root>/dev/sda3</root>
    <name>linux</name>
    <arch>x86_64</arch>
    <distro>rhel</distro>
    <product_name>Red Hat Enterprise Linux 9.0 Beta (Plow)</product_name>
    <major_version>9</major_version>
    <minor_version>0</minor_version>
    <package_format>rpm</package_format>
    <package_management>dnf</package_management>
    <osinfo>rhel9.0</osinfo>
    <mountpoints>
      <mountpoint dev="/dev/sda3">/</mountpoint>
      <mountpoint dev="/dev/sda2">/boot/efi</mountpoint>
    </mountpoints>
    <filesystems>
      <filesystem dev="/dev/sda2">
        <type>vfat</type>
        <uuid>7B77-95E7</uuid>
      </filesystem>
      <filesystem dev="/dev/sda3">
        <type>xfs</type>
        <label>root</label>
        <uuid>5057f04a-7fbc-4eef-b1d5-14517fa4b7c8</uuid>
      </filesystem>
    </filesystems>
    <applications>
      <application>
        <name>NetworkManager</name>
        <epoch>1</epoch>
        <version>1.34.0</version>
        <release>0.1.el9</release>
        <arch>x86_64</arch>
        ...
      </application>
    </applications>
  </operatingsystem>
</operatingsystems>

2.
# virt-inspector -a openSUSE-Tumbleweed.qcow2
<?xml version="1.0"?>
<operatingsystems>
  <operatingsystem>
    <root>/dev/system/root</root>
    <name>linux</name>
    <arch>x86_64</arch>
    <distro>opensuse</distro>
    <product_name>openSUSE Tumbleweed</product_name>
    <major_version>20200511</major_version>
    <minor_version>0</minor_version>
    <package_format>rpm</package_format>
    <package_management>zypper</package_management>
    <osinfo>opensuse20200511.0</osinfo>
    <mountpoints>
      <mountpoint dev="/dev/system/root">/</mountpoint>
    </mountpoints>
    <filesystems>
      <filesystem dev="/dev/system/root">
        <type>ext4</type>
        <uuid>9a64421a-3abf-48ff-a06e-b581d36731d0</uuid>
      </filesystem>
      <filesystem dev="/dev/system/swap">
        <type>swap</type>
        <uuid>5f6eca79-b0fe-4f20-b62b-cd6e36f22c48</uuid>
      </filesystem>
    </filesystems>
    <applications/>
    <icon>iVBORw0KGgoAAAAN
    ...
    gg==</icon>
  </operatingsystem>
</operatingsystems>

It works well on RHEL 9 guest image and OpenSUSE Tumbleweed.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2022:1759