3:04 p.m.
https://fedoraproject.org/wiki/Changes/RemoveDeviceMapperMultipathFromWor...
== Summary ==
The Fedora workstation livecd is the default Fedora variant getfedora.org
advices people to download.
As such most Fedora workstation installs will be done from the livecd. This
means that any package which is part of the livecd will be part of the
default install for most users.
device-mapper-multipath is 1 of only 2 packages in the default install
which still Requires the long obsoleted systemd-udev-settle.service, which
waits for all device-detection to be done + some extra waiting just to be
sure. This significantly slows down booting on various systems.
Multipath support is only necessary for installations in data-centers or
other enterprise setups, as such having device-mapper-multipath on the
livecd is not really necessary. For installations which do actually need
this device-mapper-multipath the server installation iso can be used and
this is a better fit for such installations.
== Owner ==
* Name: [[User:jwrdegoede| Hans de Goede]]
* Email: hdegoede(a)redhat.com
== Detailed Description ==
device-mapper-multipath is 1 of only 2 packages in the default install
which still Requires the long obsoleted systemd-udev-settle.service. The
other package is dmraid see [[Changes/DisableDmraidOnFirstRun|Disable
dmraid.service on first run]].
Multipath support is only necessary for installations in data-centers or
other enterprise setups, as such having device-mapper-multipath on the
livecd is not really necessary. For installations which do actually need
this device-mapper-multipath the server installation iso can be used and
this is a better fit for such installations.
Note then when installing from the server or everything netboot isos,
device-mapper-multipath depending on the obsolete udev-settle service is
not a problem, because then it will not be installed at all. Anaconda (the
installer) adds storage related packages such as device-mapper-multipath to
the installation package-set as necessary for the storage found at
installation time. So any installs done through the netinst isos already
will not have device-mapper-multipath installed.
== Feedback ==
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== Benefit to Fedora ==
systemd-udev-settle.service causes a significant and sometimes quite long
delay during boot. Removing / disabling the last 2 services depending on
this long obsolete helper service will remove the unnecessary boot delay.
== Scope ==
* Proposal owners:
** Change the livecd packagelist (comps) to no longer include the
device-mapper-multipath package
* Other developers:
** No action is required by other developers
** Except if another package still brings in device-mapper-multipath
through dependencies, then this needs to be solved / coordinated with that
other packages maintainers
* Release engineering: [https://pagure.io/releng/issue/9560 #9560] (a check
of an impact with Release Engineering is needed)
* Policies and guidelines: N/A (not needed for this Change)
* Trademark approval: N/A (not needed for this Change)
== Upgrade/compatibility impact ==
This only affects new installs, upgrades of installs which have
device-mapper-multipath installed will still have it installed after the
upgrade.
== How To Test ==
# Install F33 on a machine / VM
# Do "rpm -q device-mapper-multipath", the output should be
"device-mapper-multipath" is not installed
== User Experience ==
Faster booting Fedora when installed from the livecd.
== Dependencies ==
There are no other changes / package updates this Change depends on; or
which this change impacts.
== Contingency Plan ==
* Contingency mechanism: Re-add device-mapper-multipath to the livecd if
the dropping of it causes problems.
* Blocks release? No
== Documentation ==
This change does not require any documentation.
--
Ben Cotton
He / Him / His
Senior Program Manager, Fedora & CentOS Stream
Red Hat
TZ=America/Indiana/Indianapolis