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systemd/test/units/TEST-82-SOFTREBOOT.sh
Luca Boccassi 2f6fe4e113 test: customize /etc/os-release instead of /usr/lib/os-release
As per spec image builders can create a local /etc/os-release
with per-image IDs, so modify that one instead of the original
one in /usr/lib. For example we do this when we build debian
unstable images in mkosi.
2024-10-18 17:03:16 +01:00

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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -ex
set -o pipefail
# shellcheck source=test/units/util.sh
. "$(dirname "$0")"/util.sh
at_exit() {
# Since the soft-reboot drops the enqueued end.service, we won't shutdown
# the test VM if the test fails and have to wait for the watchdog to kill
# us (which may take quite a long time). Let's just forcibly kill the machine
# instead to save CI resources.
if [[ $? -ne 0 ]]; then
echo >&2 "Test failed, shutting down the machine..."
systemctl poweroff -ff
fi
}
trap at_exit EXIT
# Because this test tests soft-reboot, we have to get rid of the symlink we put at
# /run/nextroot to allow rebooting into the previous snapshot if the test fails for
# the duration of the test. However, let's make sure we put the symlink back in place
# if the test fails.
if [[ -L /run/nextroot ]]; then
at_error() {
mountpoint -q /run/nextroot && umount -R /run/nextroot
rm -rf /run/nextroot
ln -sf /snapshot /run/nextroot
}
trap at_error ERR
rm -f /run/nextroot
fi
systemd-analyze log-level debug
export SYSTEMD_LOG_LEVEL=debug
if [ -f /run/TEST-82-SOFTREBOOT.touch3 ]; then
echo "This is the fourth boot!"
systemd-notify --status="Fourth Boot"
test "$(busctl -j get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager SoftRebootsCount | jq -r '.data')" -eq 3
rm /run/TEST-82-SOFTREBOOT.touch3
mount
rmdir /original-root /run/nextroot
# Check that the fdstore entry still exists
test "$LISTEN_FDS" -eq 3
read -r x <&5
test "$x" = "oinkoink"
# Check that the surviving services are still around
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-survive.service)" = "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-survive-argv.service)" = "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-nosurvive-sigterm.service)" != "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-nosurvive.service)" != "active"
[[ ! -e /run/credentials/TEST-82-SOFTREBOOT-nosurvive.service ]]
assert_eq "$(cat /run/credentials/TEST-82-SOFTREBOOT-survive-argv.service/preserve)" "yay"
# There may be huge amount of pending messages in sockets. Processing them may cause journal rotation and
# removal of old archived journal files. If a journal file is removed during journalctl reading it,
# the command may fail. To mitigate such, sync before reading journals. Workaround for #32834.
journalctl --sync
# Check journals
journalctl -o short-monotonic --no-hostname --grep '(will soft-reboot|KILL|corrupt)'
assert_eq "$(journalctl -q -o short-monotonic -u systemd-journald.service --grep 'corrupt')" ""
# All succeeded, exit cleanly now
elif [ -f /run/TEST-82-SOFTREBOOT.touch2 ]; then
echo "This is the third boot!"
systemd-notify --status="Third Boot"
test "$(busctl -j get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager SoftRebootsCount | jq -r '.data')" -eq 2
rm /run/TEST-82-SOFTREBOOT.touch2
# Check that the fdstore entry still exists
test "$LISTEN_FDS" -eq 2
read -r x <&4
test "$x" = "miaumiau"
# Upload another entry
T="/dev/shm/fdstore.$RANDOM"
echo "oinkoink" >"$T"
systemd-notify --fd=3 --pid=parent 3<"$T"
rm "$T"
# Check that the surviving services are still around
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-survive.service)" = "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-survive-argv.service)" = "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-nosurvive-sigterm.service)" != "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-nosurvive.service)" != "active"
# Test that we really are in the new overlayfs root fs
read -r x </lower
test "$x" = "miep"
cmp /etc/os-release /run/systemd/propagate/.os-release-stage/os-release
grep -q MARKER=1 /etc/os-release
# Switch back to the original root, away from the overlayfs
mount --bind /original-root /run/nextroot
mount
# Restart the unit that is not supposed to survive
systemd-run --collect --service-type=exec --unit=TEST-82-SOFTREBOOT-nosurvive.service sleep infinity
# Now issue the soft reboot. We should be right back soon.
touch /run/TEST-82-SOFTREBOOT.touch3
systemctl --no-block soft-reboot
# Now block until the soft-boot killing spree kills us
exec sleep infinity
elif [ -f /run/TEST-82-SOFTREBOOT.touch ]; then
echo "This is the second boot!"
systemd-notify --status="Second Boot"
test "$(busctl -j get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager SoftRebootsCount | jq -r '.data')" -eq 1
# Clean up what we created earlier
rm /run/TEST-82-SOFTREBOOT.touch
# Check that the fdstore entry still exists
test "$LISTEN_FDS" -eq 1
read -r x <&3
test "$x" = "wuffwuff"
# Check that we got a PrepareForShutdownWithMetadata signal with the right type
cat /run/TEST-82-SOFTREBOOT.signal
test "$(jq -r '.payload.data[1].type.data' </run/TEST-82-SOFTREBOOT.signal)" = "soft-reboot"
# Check that the system credentials survived the soft reboot.
test "$(systemd-creds cat --system kernelcmdlinecred)" = "uff"
# Upload another entry
T="/dev/shm/fdstore.$RANDOM"
echo "miaumiau" >"$T"
systemd-notify --fd=3 --pid=parent 3<"$T"
rm "$T"
# Check that the surviving services are still around
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-survive.service)" = "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-survive-argv.service)" = "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-nosurvive-sigterm.service)" != "active"
test "$(systemctl show -P ActiveState TEST-82-SOFTREBOOT-nosurvive.service)" != "active"
# This time we test the /run/nextroot/ root switching logic. (We synthesize a new rootfs from the old via overlayfs)
mkdir -p /run/nextroot /tmp/nextroot-lower /original-root
mount -t tmpfs tmpfs /tmp/nextroot-lower
echo miep >/tmp/nextroot-lower/lower
# Copy os-release away, so that we can manipulate it and check that it is updated in the propagate
# directory across soft reboots. Try to cover corner cases by truncating it.
mkdir -p /tmp/nextroot-lower/etc
grep ID /etc/os-release >/tmp/nextroot-lower/etc/os-release
echo MARKER=1 >>/tmp/nextroot-lower/etc/os-release
cmp /etc/os-release /run/systemd/propagate/.os-release-stage/os-release
(! grep -q MARKER=1 /etc/os-release)
mount -t overlay nextroot /run/nextroot -o lowerdir=/tmp/nextroot-lower:/,ro
# Bind our current root into the target so that we later can return to it
mount --bind / /run/nextroot/original-root
# Restart the unit that is not supposed to survive
systemd-run --collect --service-type=exec --unit=TEST-82-SOFTREBOOT-nosurvive.service sleep infinity
# Now ensure there are no naming clashes and a bunch of transient units all succeed
for _ in $(seq 1 25); do
systemd-run --wait true
done
# Now issue the soft reboot. We should be right back soon. Given /run/nextroot exists, we should
# automatically do a softreboot instead of normal reboot.
touch /run/TEST-82-SOFTREBOOT.touch2
systemctl --no-block reboot
# Now block until the soft-boot killing spree kills us
exec sleep infinity
else
# This is the first boot
systemd-notify --status="First Boot"
test "$(busctl -j get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager SoftRebootsCount | jq -r '.data')" -eq 0
# Let's upload an fd to the fdstore, so that we can verify fdstore passing works correctly
T="/dev/shm/fdstore.$RANDOM"
echo "wuffwuff" >"$T"
systemd-notify --fd=3 --pid=parent 3<"$T"
rm "$T"
survive_sigterm="/dev/shm/survive-sigterm-$RANDOM.sh"
cat >"$survive_sigterm" <<EOF
#!/bin/bash
trap "" TERM
systemd-notify --ready
rm "$survive_sigterm"
exec sleep infinity
EOF
chmod +x "$survive_sigterm"
survive_argv="/dev/shm/survive-argv-$RANDOM.sh"
cat >"$survive_argv" <<EOF
#!/bin/bash
systemd-notify --ready
rm "$survive_argv"
exec -a @sleep sleep infinity
EOF
chmod +x "$survive_argv"
# This sets DefaultDependencies=no so that they remain running until the very end, and
# IgnoreOnIsolate=yes so that they aren't stopped via the "testsuite.target" isolation we do on next boot,
# and will be killed by the final sigterm/sigkill spree.
systemd-run --collect --service-type=notify -p DefaultDependencies=no -p IgnoreOnIsolate=yes --unit=TEST-82-SOFTREBOOT-nosurvive-sigterm.service "$survive_sigterm"
systemd-run --collect --service-type=exec -p DefaultDependencies=no -p IgnoreOnIsolate=yes -p SetCredential=gone:hoge --unit=TEST-82-SOFTREBOOT-nosurvive.service sleep infinity
# Ensure that the unit doesn't get deactivated by dependencies on the source file. Given it's a verity
# image that is already open, even if the tmpfs with the image goes away, the file will be pinned by the
# kernel and will keep working.
cp /usr/share/minimal_0.* /tmp/
# Configure these transient units to survive the soft reboot - they will not conflict with shutdown.target
# and it will be ignored on the isolate that happens in the next boot. The first will use argv[0][0] =
# '@', and the second will use SurviveFinalKillSignal=yes. Both should survive.
# By writing to stdout, which is connected to the journal, we also ensure logging doesn't break across
# soft reboots due to journald being temporarily stopped.
systemd-run --service-type=notify --unit=TEST-82-SOFTREBOOT-survive-argv.service \
--property SurviveFinalKillSignal=no \
--property IgnoreOnIsolate=yes \
--property DefaultDependencies=no \
--property After=basic.target \
--property "Conflicts=reboot.target kexec.target poweroff.target halt.target emergency.target rescue.target" \
--property "Before=reboot.target kexec.target poweroff.target halt.target emergency.target rescue.target" \
--property SetCredential=preserve:yay \
"$survive_argv"
# shellcheck disable=SC2016
systemd-run --service-type=exec --unit=TEST-82-SOFTREBOOT-survive.service \
--property TemporaryFileSystem="/run /tmp /var" \
--property RootImage=/tmp/minimal_0.raw \
--property SurviveFinalKillSignal=yes \
--property IgnoreOnIsolate=yes \
--property DefaultDependencies=no \
--property After=basic.target \
--property "Conflicts=reboot.target kexec.target poweroff.target halt.target emergency.target rescue.target" \
--property "Before=reboot.target kexec.target poweroff.target halt.target emergency.target rescue.target" \
bash -c 'count=0; while echo "$count"; do count=$[$count +1]; sleep 1; done'
# Check that we can set up an inhibitor, and that busctl monitor sees the
# PrepareForShutdownWithMetadata signal and that it says 'soft-reboot'.
systemd-run --unit busctl.service --service-type=exec --property StandardOutput=file:/run/TEST-82-SOFTREBOOT.signal \
busctl monitor --json=pretty --match 'sender=org.freedesktop.login1,path=/org/freedesktop/login1,interface=org.freedesktop.login1.Manager,member=PrepareForShutdownWithMetadata,type=signal'
systemd-run --unit inhibit.service --service-type=exec \
systemd-inhibit --what=shutdown --who=test --why=test --mode=delay \
sleep infinity
# Enqueue a bunch of failing units to try and trigger the transient name clash that happens due to D-Bus
# being restarted and the "unique" bus IDs not being unique across restarts
for _ in $(seq 1 25); do
# Use --wait to ensure we connect to the system bus instead of the private bus (otherwise a UUID is
# used instead of the bus ID)
systemd-run --wait false || true
done
# Now issue the soft reboot. We should be right back soon.
touch /run/TEST-82-SOFTREBOOT.touch
systemctl --no-block --check-inhibitors=yes soft-reboot
# Ensure the property works too
type="$(busctl --json=short get-property org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager PreparingForShutdownWithMetadata | jq -r '.data.type.data')"
test "$type" = "soft-reboot"
# Now block until the soft-boot killing spree kills us
exec sleep infinity
fi
systemd-analyze log-level info
touch /testok
systemctl --no-block exit 123