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#!/usr/bin/env bash
# Verify that if the directory containing the cluster lock is moved
# then the current cluster leader no longer claims to be leader, and
# no other node claims to be leader. Confirm that if the directory is
# moved back then a node will become leader.
# This simulates the cluster filesystem containing the cluster lock
# being unmounted and remounted.
. "${TEST_SCRIPTS_DIR}/integration.bash"
set -e
ctdb_test_skip_on_cluster
ctdb_test_init -n
echo "Starting CTDB with cluster lock recheck interval set to 5s..."
ctdb_nodes_start_custom -r 5
select_test_node
echo "Get cluster lock setting"
# shellcheck disable=SC2154
# $test_node set by select_test_node() above
ctdb_onnode "$test_node" getreclock
# shellcheck disable=SC2154
# $out set by ctdb_onnode() above
reclock_setting="$out"
if [ -z "$reclock_setting" ] ; then
ctdb_test_skip "Cluster lock is not set"
fi
t="${reclock_setting% 5}"
reclock="${t##* }"
if [ ! -f "$reclock" ] ; then
ctdb_test_error "Cluster lock file \"${reclock}\" is missing"
fi
echo "Cluster lock setting is \"${reclock_setting}\""
echo "Cluster lock file is \"${reclock}\""
echo
leader_get "$test_node"
dir=$(dirname "$reclock")
echo "Rename cluster lock directory"
mv "$dir" "${dir}.$$"
wait_until_leader_has_changed "$test_node"
echo
# shellcheck disable=SC2154
# $leader set by leader_get() & wait_until_leader_has_changed(), above
if [ "$leader" != "UNKNOWN" ]; then
test_fail "BAD: leader is ${leader}"
fi
echo "OK: leader is UNKNOWN"
echo
echo 'Get "leader timeout":'
conf_tool="${CTDB_SCRIPTS_HELPER_BINDIR}/ctdb-config"
# shellcheck disable=SC2154
# $test_node set by select_test_node() above
try_command_on_node "$test_node" "${conf_tool} get cluster 'leader timeout'"
# shellcheck disable=SC2154
# $out set by ctdb_onnode() above
leader_timeout="$out"
echo "Leader timeout is ${leader_timeout}s"
echo
sleep_time=$((2 * leader_timeout))
echo "Waiting for ${sleep_time}s to confirm leader stays UNKNOWN"
sleep_for $sleep_time
leader_get "$test_node"
if [ "$leader" = "UNKNOWN" ]; then
echo "OK: leader is UNKNOWN"
echo
else
test_fail "BAD: leader is ${leader}"
fi
echo "Restore cluster lock directory"
mv "${dir}.$$" "$dir"
wait_until_leader_has_changed "$test_node"
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