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Bug 1855973 - Cannot create LV with cache when PV is encrypted
Summary: Cannot create LV with cache when PV is encrypted
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: anaconda
Version: 8.2
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 8.0
Assignee: Anaconda Maintenance Team
QA Contact: Release Test Team
URL:
Whiteboard:
Depends On:
Blocks: 1872695
TreeView+ depends on / blocked
 
Reported: 2020-07-11 12:20 UTC by Renaud Métrich
Modified: 2023-10-06 21:03 UTC (History)
9 users (show)

Fixed In Version: anaconda-33.16.3.15-1
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1872695 (view as bug list)
Environment:
Last Closed: 2021-05-21 13:29:49 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)

Description Renaud Métrich 2020-07-11 12:20:57 UTC 
This bug was initially created as a copy of Bug #1855972

I am copying this bug because: 

Also applies to RHEL8.2.0 (after applying the patch for BZ #1836269)


Description of problem:

Trying to install a system with a cached LV and PVs Luks encrypted, the installer complains with the following message:

  Cache PVs must belong to the same VG as the cached LV

Kickstart excerpt:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
part pv.00 --ondisk=/dev/vda --size=1 --grow --encrypted --passphrase="redhat"
part pv.01 --ondisk=/dev/vdb --size=1 --grow --encrypted --passphrase="redhat"
volgroup rhel pv.00 pv.01
logvol swap --fstype="swap" --size=1024 --name=swap --vgname=rhel
logvol / --fstype="xfs" --size=8192 --name=root --vgname=rhel
logvol /data --fstype="xfs" --size=4096 --name=data --vgname=rhel --cachepvs=pv.01 --cachesize=8192 --cachemode=writeback 
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

In the example above, /data is hosted on rhel/data LV with cache PV pv.01 encrypted.
Even though pv.01 is building "rhel" volume group, the code doesn't detect that.

My hypothesis is that there is no code to handle the fact that "pv.01" is not the PV here, but the luks-encrypted device /dev/vdb.


Version-Release number of selected component (if applicable):

RHEL7 and RHEL8.2.0


How reproducible:

ALWAYS


Steps to Reproduce:
1. Install a system with a kickstart having 2 disks (see attachment for kickstart)

Actual results:

"Cache PVs must belong to the same VG as the cached LV"


Expected results:

Installs fine

Additional info:

The "workaround" I found is to use encrypted filesystems instead of encrypted PVs:

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
part pv.00 --ondisk=/dev/vda --size=1 --grow
part pv.01 --ondisk=/dev/vdb --size=1 --grow
volgroup rhel pv.00 pv.01
logvol swap --fstype="swap" --size=1024 --name=swap --vgname=rhel --encrypted --passphrase="redhat"
logvol / --fstype="xfs" --size=8192 --name=root --vgname=rhel --encrypted --passphrase="redhat"
logvol /data --fstype="xfs" --size=4096 --name=data --vgname=rhel --cachepvs=pv.01 --cachesize=8192 --cachemode=writeback --encrypted --passphrase="redhat"
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
Comment 1 Vojtech Trefny 2020-07-13 13:00:18 UTC 
upstream PR: https://github.com/rhinstaller/anaconda/pull/2733

updates image: http://file.emea.redhat.com/~vtrefny/img/rhbz1855973.img
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