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Bug 1602353 - virt-inspector can't inspect LUKS-encrypted RHEL7 guest image
Summary: virt-inspector can't inspect LUKS-encrypted RHEL7 guest image
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libguestfs
Version: 7.6
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Richard W.M. Jones
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-07-18 09:17 UTC by Xianghua Chen
Modified: 2018-10-30 07:47 UTC (History)
1 user (show)

Fixed In Version: libguestfs-1.38.2-10.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-10-30 07:47:00 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
log.virt-inspector.rhel7-luks (57.28 KB, text/plain)
2018-07-18 09:17 UTC, Xianghua Chen 		no flags Details
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2018:3021 0 None None None 2018-10-30 07:47:28 UTC

Description Xianghua Chen 2018-07-18 09:17:29 UTC 
Created attachment 1459677 [details]
log.virt-inspector.rhel7-luks

Description of problem:
virt-inspector can't inspect LUKS-encrypted RHEL7 guest image

Version-Release number of selected component (if applicable):
libguestfs-1.38.2-7.el7.x86_64

How reproducible:
100%

Steps:
1.Prepare a LUKS-encrypted RHEL7 guest image：
rhel7.6-LUKS.qcow2

2.
$ echo REDHAT | virt-inspector -a rhel7.6-LUKS.qcow2  --keys-from-stdin 
<?xml version="1.0"?>
<operatingsystems/>


Please check the -v -x log in attachment.


Actual results:
Failed to inspect luks image.

Expected results:
Can inspect luks image successfully.


Additional info:
virt-tail, virt-get-kernel... with luks image also failed.
on rhel8, it's ok.
Comment 1 Richard W.M. Jones 2018-07-18 11:32:55 UTC 
Interesting that the LUKS command to open the encrypted
partition doesn't fail, yet the subsequent vgscan returns
nothing.  I wonder a few things:

(1) Kernel prints an odd message which might be relevant:

[   25.558293] alg: No test for fips(ansi_cprng) (fips_ansi_cprng)

(2) I discovered recently that the commands to rescan PVs
have changed.  Also maybe our use of lvmetad changed things too.
See:

https://github.com/libguestfs/libguestfs/commit/dd162d2cd56a2ecf4bcd40a7f463940eaac875b8

But I agree this is clearly a regression.
Comment 2 Richard W.M. Jones 2018-07-18 11:34:09 UTC 
Also we don't have a regression test upstream for this but
clearly we should do.
Comment 3 Richard W.M. Jones 2018-07-18 13:37:54 UTC 
Patch series posted:
https://www.redhat.com/archives/libguestfs/2018-July/msg00039.html
Comment 4 Pino Toscano 2018-07-27 13:51:13 UTC 
Fixed upstream with
https://github.com/libguestfs/libguestfs/commit/83fb657bec7f4de8392cd28d29185afdd46ae9bb
https://github.com/libguestfs/libguestfs/commit/16e64b8988a7768aa78ff200ca46878b151dbd1f
https://github.com/libguestfs/libguestfs/commit/55dfcb2211a6af949d46f8c05adab01e35ae283c
https://github.com/libguestfs/libguestfs/commit/ec2228ea05c0f482bc00df63586e8be36b591bfb

Only the first commit is strictly needed, the others are tests & a new API.
Comment 6 Xianghua Chen 2018-07-31 03:06:00 UTC 
Verified with package：
libguestfs-1.38.2-10.el7.x86_64

Steps：
1.Prepare a LUKS-encrypted RHEL7 guest image：
rhel7.6-LUKS.qcow2

2.
# echo REDHAT | virt-inspector -a rhel7.6-LUKS.qcow2  --keys-from-stdin 
<?xml version="1.0"?>
<operatingsystems>
  <operatingsystem>
    <root>/dev/rhel/root</root>
    <name>linux</name>
    <arch>x86_64</arch>
    <distro>rhel</distro>
    <product_name>Red Hat Enterprise Linux Server 7.6 Beta (Maipo)</product_name>
    <major_version>7</major_version>
    <minor_version>6</minor_version>
    <package_format>rpm</package_format>
    <package_management>yum</package_management>
    <hostname>localhost.localdomain</hostname>
    <osinfo>rhel7.6</osinfo>
    <mountpoints>
      <mountpoint dev="/dev/rhel/root">/</mountpoint>
      <mountpoint dev="/dev/sda1">/boot</mountpoint>
    </mountpoints>
    <filesystems>
... ...
Comment 8 errata-xmlrpc 2018-10-30 07:47:00 UTC 
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, 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/RHEA-2018:3021
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