ctdb-tests: Add a simple test for database traverses

This tests that volatile databases traverse correctly, including the
case where a record was updated on a non-lmaster node.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13499

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

diff --git a/ctdb/tests/simple/79_volatile_db_traverse.sh b/ctdb/tests/simple/79_volatile_db_traverse.sh
new file mode 100755 (executable)
index 0000000..50732ca
--- /dev/null
+++ b/ctdb/tests/simple/79_volatile_db_traverse.sh
@@ -0,0 +1,94 @@
+#!/bin/bash
+
+test_info()
+{
+    cat <<EOF
+Confirm that traverses of volatile databases work as expected
+
+This is a very simple example.  It writes a single record, updates it
+on another node and then confirms that the correct value is found when
+traversing.  It then repeats this after removing the LMASTER role from
+the node where the value is updated.
+
+Expected results:
+
+* The expected records should be found
+
+EOF
+}
+
+. "${TEST_SCRIPTS_DIR}/integration.bash"
+
+ctdb_test_init "$@"
+
+set -e
+
+cluster_is_healthy
+
+# Reset configuration
+ctdb_restart_when_done
+
+#
+# Main test
+#
+TESTDB="traverse_db.tdb"
+
+echo "create volatile test database $TESTDB"
+try_command_on_node 0 $CTDB attach "$TESTDB"
+
+echo "wipe test database $TESTDB"
+try_command_on_node 0 $CTDB wipedb "$TESTDB"
+
+echo "write foo=bar0 on node 0"
+try_command_on_node 0 $CTDB writekey "$TESTDB" "foo" "bar0"
+
+echo "write foo=bar1 on node 1"
+try_command_on_node 1 $CTDB writekey "$TESTDB" "foo" "bar1"
+
+echo "do traverse on node 0"
+try_command_on_node -v 0 $CTDB catdb "$TESTDB"
+
+echo "do traverse on node 1"
+try_command_on_node -v 1 $CTDB catdb "$TESTDB"
+
+cat <<EOF
+
+Again, this time with lmaster role off on node 1
+
+EOF
+
+echo "wipe test database $TESTDB"
+try_command_on_node 0 $CTDB wipedb "$TESTDB"
+
+echo "switching off lmaster role on node 1"
+try_command_on_node 1 $CTDB setlmasterrole off
+
+try_command_on_node -v 1 $CTDB getcapabilities
+
+wait_until_node_has_status 1 notlmaster 10 0
+# Wait for recovery and new VNN map to be pushed
+#sleep_for 10
+
+echo "write foo=bar0 on node 0"
+try_command_on_node 0 $CTDB writekey "$TESTDB" "foo" "bar0"
+
+echo "write foo=bar1 on node 1"
+try_command_on_node 1 $CTDB writekey "$TESTDB" "foo" "bar1"
+
+echo "do traverse on node 0"
+try_command_on_node -v 0 $CTDB catdb "$TESTDB"
+
+num=$(echo "$out" | sed -n -e 's|^Dumped \(.*\) records$|\1|p')
+if [ "$num" = 1 ] ; then
+       echo "OK: There was 1 record"
+else
+       echo "BAD: There were ${num} (!= 1) records"
+       exit 1
+fi
+
+if echo "$out" | grep -q "^data(4) = \"bar1\"\$" ; then
+       echo "OK: Data from node 1 was returned"
+else
+       echo "BAD: Data from node 1 was not returned"
+       exit 1
+fi