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Drop the X.Org server dependency
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Start GNOME Kiosk as a Wayland compositor and run Anaconda as a native
Wayland client.

This commit is a follow up on the work done by Neal Gompa [1], Martin
Kolman and Ray Strode [2]. Credit goes to them for the code I copied
and pasted.

[1] rhinstaller#5401
[2] rhinstaller#5309

Co-authored-by: Neal Gompa <neal@gompa.dev>
Co-authored-by: Martin Kolman <mkolman@redhat.com>
Co-authored-by: Ray Strode <rstrode@redhat.com>
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4 people committed Apr 15, 2024
1 parent 5464451 commit 6e465af
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Showing 14 changed files with 323 additions and 56 deletions.
13 changes: 10 additions & 3 deletions anaconda.py
Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,12 @@ def setup_environment():
if "LD_PRELOAD" in os.environ:
del os.environ["LD_PRELOAD"]

# Go ahead and set $WAYLAND_DISPLAY whether we're going to use Wayland or not
if "WAYLAND_DISPLAY" in os.environ:
flags.preexisting_wayland = True
else:
os.environ["WAYLAND_DISPLAY"] = constants.WAYLAND_SOCKET_NAME

# Go ahead and set $DISPLAY whether we're going to use X or not
if "DISPLAY" in os.environ:
flags.preexisting_x11 = True
Expand Down Expand Up @@ -307,10 +313,11 @@ def setup_environment():
except pid.PidFileError as e:
log.error("Unable to create %s, exiting", pidfile.filename)

# If we had a $DISPLAY at start and zenity is available, we may be
# running in a live environment and we can display an error dialog.
# If we had a Wayland/X11 display at start and zenity is available, we may
# be running in a live environment and we can display an error dialog.
# Otherwise just print an error.
if flags.preexisting_x11 and os.access("/usr/bin/zenity", os.X_OK):
preexisting_graphics = flags.preexisting_wayland or flags.preexisting_x11
if preexisting_graphics and os.access("/usr/bin/zenity", os.X_OK):
# The module-level _() calls are ok here because the language may
# be set from the live environment in this case, and anaconda's
# language setup hasn't happened yet.
Expand Down
4 changes: 2 additions & 2 deletions anaconda.spec.in
Original file line number Diff line number Diff line change
Expand Up @@ -245,14 +245,13 @@ Requires: zram-generator
# needed for proper driver disk support - if RPMs must be installed, a repo is needed
Requires: createrepo_c
# Display stuff moved from lorax templates
Requires: xorg-x11-drivers
Requires: xorg-x11-server-Xorg
Requires: dbus-x11
Requires: gsettings-desktop-schemas
Requires: nm-connection-editor
Requires: librsvg2
Requires: gnome-kiosk
Requires: brltty
Requires: python3-pam
# dependencies for rpm-ostree payload module
Requires: rpm-ostree >= %{rpmostreever}
Requires: ostree
Expand Down Expand Up @@ -392,6 +391,7 @@ rm -rf \
%{_sbindir}/anaconda
%{_sbindir}/handle-sshpw
%{_datadir}/anaconda
%{_sysconfdir}/pam.d/anaconda
%{_prefix}/libexec/anaconda
%exclude %{_datadir}/anaconda/gnome
%exclude %{_datadir}/anaconda/pixmaps
Expand Down
1 change: 1 addition & 0 deletions configure.ac
Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,7 @@ AC_CONFIG_FILES([Makefile
data/systemd/Makefile
data/dbus/Makefile
data/gtk-4.0/Makefile
data/pam/Makefile
data/window-manager/Makefile
data/window-manager/config/Makefile
po/Makefile
Expand Down
2 changes: 1 addition & 1 deletion data/Makefile.am
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

SUBDIRS = command-stubs gtk-4.0 liveinst systemd pixmaps window-manager dbus conf.d profile.d
SUBDIRS = command-stubs gtk-4.0 liveinst systemd pam pixmaps window-manager dbus conf.d profile.d

CLEANFILES = *~

Expand Down
21 changes: 21 additions & 0 deletions data/pam/Makefile.am
Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
# Copyright (C) 2024 Neal Gompa.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

CLEANFILES = *~

pamdir = $(sysconfdir)/pam.d
dist_pam_DATA = anaconda

MAINTAINERCLEANFILES = Makefile.in
8 changes: 8 additions & 0 deletions data/pam/anaconda
Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
#%PAM-1.0
auth sufficient pam_permit.so
account sufficient pam_permit.so
password sufficient pam_permit.so
session required pam_loginuid.so
-session optional pam_keyinit.so revoke
-session optional pam_limits.so
session required pam_systemd.so
2 changes: 1 addition & 1 deletion data/systemd/anaconda.service
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,6 @@ Wants=anaconda-noshell.service

[Service]
Type=forking
Environment=HOME=/root MALLOC_CHECK_=2 MALLOC_PERTURB_=204 PATH=/usr/bin:/bin:/sbin:/usr/sbin:/mnt/sysimage/bin:/mnt/sysimage/usr/bin:/mnt/sysimage/usr/sbin:/mnt/sysimage/sbin LANG=en_US.UTF-8 GDK_BACKEND=x11 XDG_RUNTIME_DIR=/tmp GIO_USE_VFS=local
Environment=HOME=/root MALLOC_CHECK_=2 MALLOC_PERTURB_=204 PATH=/usr/bin:/bin:/sbin:/usr/sbin:/mnt/sysimage/bin:/mnt/sysimage/usr/bin:/mnt/sysimage/usr/sbin:/mnt/sysimage/sbin LANG=en_US.UTF-8 GDK_BACKEND=wayland XDG_RUNTIME_DIR=/run/user/0 GIO_USE_VFS=local
WorkingDirectory=/root
ExecStart=/usr/bin/tmux -u -f /usr/share/anaconda/tmux.conf start
3 changes: 3 additions & 0 deletions pyanaconda/core/constants.py
Original file line number Diff line number Diff line change
Expand Up @@ -267,6 +267,9 @@ class SecretStatus(Enum):
IPMI_ABORTED = 0x9 # installation finished unsuccessfully, due to some non-exn error
IPMI_FAILED = 0xA # installation hit an exception

# Wayland socket name to use
WAYLAND_SOCKET_NAME = "wl-sysinstall-0"

# X display number to use
X_DISPLAY_NUMBER = 1

Expand Down
2 changes: 1 addition & 1 deletion pyanaconda/core/util.py
Original file line number Diff line number Diff line change
Expand Up @@ -255,7 +255,7 @@ def sigusr1_preexec():
log.debug("Exception handler test suspended to prevent accidental activation by "
"delayed Xorg start. Next SIGUSR1 will be handled as delayed Xorg start.")
# Raise an exception to notify the caller that things went wrong. This affects
# particularly pyanaconda.display.do_startup_x11_actions(), where the window manager
# particularly pyanaconda.display.do_startup_wl_actions(), where the window manager
# is started immediately after this. The WM would just wait forever.
raise TimeoutError("Timeout trying to start %s" % argv[0])

Expand Down
85 changes: 39 additions & 46 deletions pyanaconda/display.py
Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,6 @@
# Author(s): Martin Kolman <mkolman@redhat.com>
#
import os
import subprocess
import time
import textwrap
import pkgutil
Expand Down Expand Up @@ -52,9 +51,9 @@
log = get_module_logger(__name__)
stdout_log = get_stdout_logger()

X_TIMEOUT_ADVICE = \
WAYLAND_TIMEOUT_ADVICE = \
"Do not load the stage2 image over a slow network link.\n" \
"Wait longer for the X server startup with the inst.xtimeout=<SECONDS> boot option." \
"Wait longer for Wayland startup with the inst.xtimeout=<SECONDS> boot option." \
"The default is 60 seconds.\n" \
"Load the stage2 image into memory with the rd.live.ram boot option to decrease access " \
"time.\n" \
Expand Down Expand Up @@ -172,22 +171,7 @@ def check_vnc_can_be_started(anaconda):
return vnc_startup_possible, error_messages


# X11

def start_x11(xtimeout):
"""Start the X server for the Anaconda GUI."""

# Start Xorg and wait for it become ready
util.startX(["Xorg", "-br", "-logfile", "/tmp/X.log",
":%s" % constants.X_DISPLAY_NUMBER, "vt6", "-s", "1440", "-ac",
"-nolisten", "tcp", "-dpi", "96",
"-noreset"],
output_redirect=subprocess.DEVNULL, timeout=xtimeout)


# function to handle X startup special issues for anaconda

def do_startup_x11_actions():
def do_startup_wl_actions(timeout):
"""Start the window manager.
When window manager actually connects to the X server is unknowable, but
Expand All @@ -209,14 +193,35 @@ def do_startup_x11_actions():
xdg_config_dirs = datadir + ':' + os.environ['XDG_CONFIG_DIRS']
os.environ['XDG_CONFIG_DIRS'] = xdg_config_dirs

def x11_preexec():
os.environ["XDG_SESSION_TYPE"] = "wayland"

def wl_preexec():
# to set GUI subprocess SIGINT handler
signal.signal(signal.SIGINT, signal.SIG_IGN)

childproc = util.startProgram(["gnome-kiosk", "--display", ":1", "--sm-disable", "--x11"],
env_add={'XDG_DATA_DIRS': xdg_data_dirs},
preexec_fn=x11_preexec)
WatchProcesses.watch_process(childproc, "gnome-kiosk")
argv = ["/usr/libexec/anaconda/run-in-new-session",
"--user", "root",
"--service", "anaconda",
"--vt", "6",
"--session-type", "wayland",
"--session-class", "user",
"gnome-kiosk", "--sm-disable", "--wayland", "--no-x11",
"--wayland-display", constants.WAYLAND_SOCKET_NAME]

childproc = util.startProgram(argv, env_add={'XDG_DATA_DIRS': xdg_data_dirs},
preexec_fn=wl_preexec)
WatchProcesses.watch_process(childproc, argv[0])

for _i in range(0, int(timeout / 0.1)):
wl_socket_path = os.path.join(os.getenv("XDG_RUNTIME_DIR"), constants.WAYLAND_SOCKET_NAME)
if os.path.exists(wl_socket_path):
return

time.sleep(0.1)

WatchProcesses.unwatch_process(childproc)
childproc.terminate()
raise TimeoutError("Timeout trying to start gnome-kiosk")


def set_resolution(runres):
Expand Down Expand Up @@ -324,17 +329,6 @@ def setup_display(anaconda, options):
for error_message in vnc_error_messages:
stdout_log.warning(error_message)

# Should we try to start Xorg?
want_x = anaconda.gui_mode and not (flags.preexisting_x11 or flags.usevnc)

# Is Xorg is actually available?
if want_x and not os.access("/usr/bin/Xorg", os.X_OK):
stdout_log.warning(_("Graphical installation is not available. "
"Starting text mode."))
time.sleep(2)
anaconda.display_mode = constants.DisplayModes.TUI
want_x = False

if anaconda.tui_mode and flags.vncquestion:
# we prefer vnc over text mode, so ask about that
message = _("Text mode provides a limited set of installation "
Expand All @@ -350,27 +344,26 @@ def setup_display(anaconda, options):
startup_utils.check_memory(anaconda, options)

# check_memory may have changed the display mode
want_x = want_x and (anaconda.gui_mode)
if want_x:
want_gui = anaconda.gui_mode and not (flags.preexisting_wayland or flags.usevnc)
if want_gui:
try:
start_x11(xtimeout)
do_startup_x11_actions()
do_startup_wl_actions(xtimeout)
except TimeoutError as e:
log.warning("X startup failed: %s", e)
print("\nX did not start in the expected time, falling back to text mode. There are "
"multiple ways to avoid this issue:")
log.warning("Wayland startup failed: %s", e)
print("\nWayland did not start in the expected time, falling back to text mode. "
"There are multiple ways to avoid this issue:")
wrapper = textwrap.TextWrapper(initial_indent=" * ", subsequent_indent=" ",
width=os.get_terminal_size().columns - 3)
for line in X_TIMEOUT_ADVICE.split("\n"):
for line in WAYLAND_TIMEOUT_ADVICE.split("\n"):
print(wrapper.fill(line))
util.vtActivate(1)
anaconda.display_mode = constants.DisplayModes.TUI
anaconda.gui_startup_failed = True
time.sleep(2)

except (OSError, RuntimeError) as e:
log.warning("X or window manager startup failed: %s", e)
print("\nX or window manager startup failed, falling back to text mode.")
log.warning("Wayland startup failed: %s", e)
print("\nWayland startup failed, falling back to text mode.")
util.vtActivate(1)
anaconda.display_mode = constants.DisplayModes.TUI
anaconda.gui_startup_failed = True
Expand All @@ -394,7 +387,7 @@ def on_mutter_ready(observer):
# if they want us to use VNC do that now
if anaconda.gui_mode and flags.usevnc:
vnc_server.startServer()
do_startup_x11_actions()
do_startup_wl_actions(xtimeout)

# with X running we can initialize the UI interface
anaconda.initialize_interface()
Expand Down
1 change: 1 addition & 0 deletions pyanaconda/flags.py
Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ def __init__(self):
self.__dict__['_in_init'] = True
self.usevnc = False
self.vncquestion = True
self.preexisting_wayland = False
self.preexisting_x11 = False
self.automatedInstall = False
self.eject = True
Expand Down
3 changes: 2 additions & 1 deletion scripts/Makefile.am
Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,8 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.

scriptsdir = $(libexecdir)/$(PACKAGE_NAME)
dist_scripts_SCRIPTS = run-anaconda anaconda-pre-log-gen log-capture start-module apply-updates
dist_scripts_SCRIPTS = run-anaconda anaconda-pre-log-gen log-capture start-module apply-updates \
run-in-new-session

dist_noinst_SCRIPTS = makeupdates makebumpver

Expand Down
3 changes: 2 additions & 1 deletion scripts/makeupdates
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,8 @@ RPM_RELEASE_DIR_TEMPLATE = "for_%s"
SITE_PACKAGES_PATH = "./usr/lib64/python3.12/site-packages/"

# Anaconda scripts that should be installed into the libexec folder
LIBEXEC_SCRIPTS = ["log-capture", "start-module", "apply-updates", "anaconda-pre-log-gen"]
LIBEXEC_SCRIPTS = ["log-capture", "start-module", "apply-updates", "anaconda-pre-log-gen",
"run-in-new-session"]

# Anaconda scripts that should be installed into /usr/bin
USR_BIN_SCRIPTS = ["anaconda-disable-nm-ibft-plugin", "anaconda-nm-disable-autocons"]
Expand Down
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