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eede787b0a
The reset code runs purge, but give how purge works, it may happen that there are unexpected snap units. Specifically, lxd tends to start snap.lxd.workaround.service unit directly through systemd-run, which is not known to snapd and thus will not be stopped during purge. This should fix the following issue in tests/main/postrm-purge: ``` + systemctl --plain --no-legend --full + grep -E 'snap\..*\.(service|timer|socket)' snap.lxd.workaround.service loaded active exited /bin/true + echo 'found unexpected leftovers' found unexpected leftovers + exit 1 ``` Signed-off-by: Maciej Borzecki <maciej.borzecki@canonical.com>
215 lines
7.9 KiB
Bash
Executable File
215 lines
7.9 KiB
Bash
Executable File
#!/bin/bash -x
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# shellcheck source=tests/lib/state.sh
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. "$TESTSLIB/state.sh"
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reset_classic() {
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# Reload all service units as in some situations the unit might
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# have changed on the disk.
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systemctl daemon-reload
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tests.systemd stop-unit snapd.service snapd.socket
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# none of the purge steps stop the user services, we need to do it
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# explicitly, at least for the root user
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systemctl --user stop snapd.session-agent.socket || true
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SNAP_MOUNT_DIR="$(os.paths snap-mount-dir)"
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case "$SPREAD_SYSTEM" in
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ubuntu-*|debian-*)
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sh -x "${SPREAD_PATH}/debian/snapd.prerm" remove
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sh -x "${SPREAD_PATH}/debian/snapd.postrm" purge
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;;
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fedora-*|opensuse-*|arch-*|amazon-*|centos-*)
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# We don't know if snap-mgmt was built, so call the *.in file
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# directly and pass arguments that will override the placeholders
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sh -x "${SPREAD_PATH}/cmd/snap-mgmt/snap-mgmt.sh.in" \
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--snap-mount-dir="$SNAP_MOUNT_DIR" \
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--purge
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# The script above doesn't remove the snapd directory as this
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# is normally done by the rpm packaging system.
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rm -rf /var/lib/snapd
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;;
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*)
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echo "don't know how to reset $SPREAD_SYSTEM"
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exit 1
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;;
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esac
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local unexpected_units=0
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for unit in $(systemctl --plain --no-legend --full | awk '/^ *snap\..*\.service +loaded/ {print $1}'); do
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case "$unit" in
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snap.lxd.workaround.service)
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systemctl stop "$unit" || true
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;;
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*)
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echo "unexpected unit $unit"
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unexpected_units=1
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;;
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esac
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done
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if [ "$unexpected_units" != "0" ]; then
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echo "error: found unexpected systemd units after purge"
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exit 1
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fi
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# purge may have removed udev rules, retrigger device events
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udevadm trigger
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udevadm settle
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# purge has removed units, reload the state now
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systemctl daemon-reload
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# extra purge
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rm -rvf /var/snap "${SNAP_MOUNT_DIR:?}/bin"
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mkdir -p "$SNAP_MOUNT_DIR" /var/snap /var/lib/snapd
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if [ "$(find "$SNAP_MOUNT_DIR" /var/snap -mindepth 1 -print -quit)" ]; then
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echo "postinst purge failed"
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ls -lR "$SNAP_MOUNT_DIR"/ /var/snap/
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exit 1
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fi
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rm -rf /tmp/snap-private-tmp/*
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case "$SPREAD_SYSTEM" in
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fedora-*|centos-*)
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# On systems running SELinux we need to restore the context of the
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# directories we just recreated. Otherwise, the entries created
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# inside will be incorrectly labeled.
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restorecon -F -v -R "$SNAP_MOUNT_DIR" /var/snap /var/lib/snapd
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;;
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esac
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# systemd retains the failed state of service units, even after they are
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# removed, we need to reset their 'failed state'
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systemctl --plain --failed --no-legend --full | awk '/^ *snap\..*\.service +(error|not-found) +failed/ {print $1}' | while read -r unit; do
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systemctl reset-failed "$unit" || true
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done
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if os.query is-trusty; then
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systemctl start snap.mount.service
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fi
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# Clean root home
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rm -rf /root/snap /root/.snap/gnupg /root/.{bash_history,local,cache,config} /root/.snap/data
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# Clean test home
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rm -rf /home/test/snap /home/test/.{bash_history,local,cache,config} /home/test/.snap/data
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# Clean /tmp
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rm -f /tmp/core* /tmp/ubuntu-core*
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if [ "$1" = "--reuse-core" ]; then
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# Restore snapd state and start systemd service units
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restore_snapd_state
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escaped_snap_mount_dir="$(systemd-escape --path "$SNAP_MOUNT_DIR")"
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mounts="$(systemctl list-unit-files --full | grep "^${escaped_snap_mount_dir}[-.].*\\.mount" | cut -f1 -d ' ')"
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services="$(systemctl list-unit-files --full | grep "^${escaped_snap_mount_dir}[-.].*\\.service" | cut -f1 -d ' ')"
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systemctl daemon-reload # Workaround for http://paste.ubuntu.com/17735820/
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for unit in $mounts $services; do
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systemctl start "$unit"
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done
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# force all profiles to be re-generated
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rm -f /var/lib/snapd/system-key
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# force snapd-session-agent.socket fto be re-generated
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rm -f /run/user/0/snapd-session-agent.socket
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fi
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# Make sure the systemd user wants directories exist
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mkdir -p /etc/systemd/user/sockets.target.wants /etc/systemd/user/timers.target.wants /etc/systemd/user/default.target.wants
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if [ "$1" != "--keep-stopped" ]; then
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systemctl start snapd.socket
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EXTRA_NC_ARGS="-q 1"
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case "$SPREAD_SYSTEM" in
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debian-10-*)
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# Param -q is not available on fedora 34
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EXTRA_NC_ARGS="-w 1"
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;;
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fedora-*|amazon-*|centos-*)
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EXTRA_NC_ARGS=""
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;;
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esac
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# wait for snapd listening
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retry -n 120 --wait 0.5 sh -c "printf 'GET / HTTP/1.0\r\n\r\n' | nc -U $EXTRA_NC_ARGS /run/snapd.socket"
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fi
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}
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reset_all_snap() {
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# remove all leftover snaps
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# make sure snapd is running before we attempt to remove snaps, in case a test stopped it
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if ! systemctl status snapd.service snapd.socket >/dev/null; then
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systemctl start snapd.service snapd.socket
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fi
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skip_snaps=""
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PREINSTALLED_SNAPS="$(tests.env get initial PREINSTALLED_SNAPS)"
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for skip_remove_snap in $SKIP_REMOVE_SNAPS $PREINSTALLED_SNAPS; do
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skip_snaps="$skip_snaps --skip $skip_remove_snap"
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done
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# shellcheck disable=SC2086
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"$TESTSTOOLS"/snaps.cleanup $skip_snaps
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# purge may have removed udev rules, retrigger device events
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udevadm trigger
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udevadm settle
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# ensure we have the same state as initially
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systemctl stop snapd.service snapd.socket
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restore_snapd_state
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rm -rf /root/.snap
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rm -rf /tmp/snap-private-tmp/snap.*
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if [ "$1" != "--keep-stopped" ]; then
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systemctl start snapd.service snapd.socket
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fi
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# Exit in case there is a snap in broken state after restoring the snapd state
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if snap list --all | grep -E "broken$"; then
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echo "snap in broken state"
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exit 1
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fi
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}
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# Before resetting all snapd state, specifically remove all disabled snaps that
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# are not from the store, since otherwise their revision number will remain
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# mounted at /snap/<name>/x<rev>/ and if we execute multiple tests that use this
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# same snap, the previous mount unit for x2 for example will stay around if we
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# simply revert to x1 and then delete state.json, since x2 is still mounted if
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# we then again install that snap again twice (i.e. to get to x2), the mount
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# unit will still be active and thus the previous iteration of this snap at
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# revision x2 will be used as this new revision's files for x2. This is
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# particularly damaging for the snapd snap when we are installing different
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# versions such as in the snapd-refresh-vs-services (and the -reboots variant)
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# test, since the bug manifests as us trying to refresh to a particular revision
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# of snapd, but that revision is still mounted from the previous iteration of
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# the test and thus gets the wrong version, as displayed in this output:
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#
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# + snap install --dangerous snapd_2.49.1.snap
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# 2021-04-23T20:11:20Z INFO Waiting for automatic snapd restart...
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# snapd 2.49.2 installed
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#
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remove_disabled_snaps
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# When the variable REUSE_SNAPD is set to 1, we don't remove and purge snapd.
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# In that case we just cleanup the environment by removing installed snaps as
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# it is done for core systems.
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if os.query is-core || [ "$REUSE_SNAPD" = 1 ]; then
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reset_all_snap "$@"
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else
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reset_classic "$@"
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fi
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# Discard all mount namespaces and active mount profiles.
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# This is duplicating logic in snap-discard-ns but it doesn't
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# support --all switch yet so we cannot use it.
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if [ -d /run/snapd/ns ]; then
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for mnt in /run/snapd/ns/*.mnt; do
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umount -l "$mnt" || true
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rm -f "$mnt"
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done
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find /run/snapd/ns/ \( -name '*.fstab' -o -name '*.user-fstab' -o -name '*.info' \) -delete
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fi
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