tests: Add a test for recovery of persistent databases

Ensure that RSN based recovery and __db_sequence_number__ based recovery
methods for persistent databases work correctly.  They should not cause
corruption of the database.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 45d439a1ab093b420c27b1502ef109021833c7af)

1 files changed, 119 insertions, 0 deletions

diff --git a/ctdb/tests/simple/76_ctdb_pdb_recovery.sh b/ctdb/tests/simple/76_ctdb_pdb_recovery.sh
new file mode 100755
index 0000000000..2f21fdd805
--- /dev/null
+++ b/ctdb/tests/simple/76_ctdb_pdb_recovery.sh
@@ -0,0 +1,119 @@
+#!/bin/bash
+
+test_info()
+{
+    cat <<EOF
+The recovery process based on RSN for persistent databases is defective.
+For persistent databases sequence number based recovery method should be
+used. This test checks for the defect in the RSN based recovery method
+for persistent databases and confirms that the same issue is not observed
+when using sequence number based recovery method.
+
+Steps:
+
+1. Create a persistent database
+2. Add a record and update it few times. Set the sequence number to 5
+3. Delete the record
+4. Turn off one of the nodes
+5. Add a record with same key. Set the sequence number to 10
+6. Turn on the stopped node
+
+Expected results:
+
+* Check that the record is deleted (RSN based recovery) and record is
+  present (sequence number based recovery)
+
+EOF
+}
+
+. "${TEST_SCRIPTS_DIR}/integration.bash"
+
+ctdb_test_init "$@"
+
+set -e
+
+cluster_is_healthy
+
+# Reset configuration
+ctdb_restart_when_done
+
+do_test()
+{
+# Wipe Test database
+echo "wipe test database"
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb wipedb $TESTDB
+
+# Add a record   key=test1 data=value1
+# and update values
+for value in value1 value2 value3 value4 value5 ; do
+	echo "store key(test1) data($value)"
+	try_command_on_node -q 0 "(echo -ne $value > /tmp/test_data)"
+	try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb pstore $TESTDB test1 /tmp/test_data
+done
+
+# Update sequence number on all the nodes
+echo "set __db_sequence_number__ to 5"
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb setdbseqnum $TESTDB 5
+
+# Delete record
+echo "delete key(test1)"
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb pdelete $TESTDB test1
+
+# Stop a node
+echo "stop node 1"
+try_command_on_node -q 1 $CTDB_TEST_WRAPPER ctdb stop
+
+wait_until_node_has_status 1 stopped
+
+# Add a record   key=test1 data=value2
+echo "store key(test1) data(newvalue1)"
+try_command_on_node -q 0 "(echo -ne newvalue1 > /tmp/test_data)"
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb pstore $TESTDB test1 /tmp/test_data
+
+echo "set __db_sequence_number__ to 6"
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb setdbseqnum $TESTDB 6
+
+# Continue node
+echo "contine node 1"
+try_command_on_node -q 1 $CTDB_TEST_WRAPPER ctdb continue
+
+wait_until_node_has_status 1 notstopped
+
+}
+
+#
+# Main test
+#
+TESTDB="persistent_test.tdb"
+
+stauts=0
+
+# Create a temporary persistent database to test with
+echo "create persistent test database $TESTDB"
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb attach $TESTDB persistent
+
+# Set RecoverPDBBySeqNum = 0
+echo "set RecoverPDBBySeqNum to 0"
+try_command_on_node -q all $CTDB_TEST_WRAPPER ctdb setvar RecoverPDBBySeqNum 0
+
+do_test
+if try_command_on_node 0 $CTDB_TEST_WRAPPER ctdb pfetch $TESTDB test1 ; then
+	echo "GOOD: Record was not deleted (recovery by RSN worked)"
+else
+	echo "BAD: Record was not deleted"
+	status=1
+fi
+
+# Set RecoverPDBBySeqNum = 1
+echo "set RecoverPDBBySeqNum to 1"
+try_command_on_node -q all $CTDB_TEST_WRAPPER ctdb setvar RecoverPDBBySeqNum 1
+
+do_test
+if try_command_on_node 0 $CTDB_TEST_WRAPPER ctdb pfetch $TESTDB test1 ; then
+	echo "GOOD: Record was not deleted (recovery by sequnce number worked)"
+else
+	echo "BAD: Record was deleted"
+	status=1
+fi
+
+exit $status