READONLY: add test for creating and revoking delegations

(This used to be ctdb commit a7e7fa2169ee12f817336f6d03d5bb72df7ec020)

ctdb/tests/simple/75_readonly_records_basic.sh

@@ -0,0 +1,163 @@
+#!/bin/bash
+
+test_info()
+{
+    cat <<EOF
+Readonly records can be activated at runtime using a ctdb command.
+If readonly records are not activated, then any attempt to fetch a readonly
+copy should be automatically upgraded to a read-write fetch_lock().
+
+If readonly delegations are present, then any attempt to aquire a read-write
+fetch_lock will trigger all delegations to be revoked before the fetch lock
+completes.
+
+
+Prerequisites:
+
+* An active CTDB cluster with at least 2 active nodes.
+
+Steps:
+
+1. Verify that the status on all of the ctdb nodes is 'OK'.
+2. create a test database and some records
+3. try to fetch readonly records, this should not result in any delegations
+4. activate readonly support
+5. try to fetch readonly records, this should result in delegations
+6. do a fetchlock  and the delegations should be revoked
+7. try to fetch readonly records, this should result in delegations
+8. do a recovery  and the delegations should be revoked
+
+Expected results:
+
+3. No delegations created when db is not in readonly mode
+4. It is possible to activate readonly support for a database
+5. Delegations should be created
+6. Delegations should be revoked
+8. Delegations should be revoked
+
+
+EOF
+}
+
+. ctdb_test_functions.bash
+
+ctdb_test_init "$@"
+
+set -e
+
+cluster_is_healthy
+
+# Reset configuration
+ctdb_restart_when_done
+
+try_command_on_node 0 "$CTDB listnodes"
+num_nodes=$(echo "$out" | wc -l)
+
+
+# create a temporary database to test with
+echo create test database test.tdb
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb attach test.tdb
+
+
+# create some records
+try_command_on_node -q all $CTDB_TEST_WRAPPER ctdb_update_record
+
+#
+# 3
+# try readonly requests
+echo Try some readonly fetches, these should all be upgraded to full fetchlocks
+try_command_on_node -q 0,1,2 $CTDB_TEST_WRAPPER "ctdb_fetch_readonly_once </dev/null"
+
+# no delegations should have been created
+numreadonly=`try_command_on_node -v all $CTDB_TEST_WRAPPER ctdb cattdb test.tdb | grep READONLY | wc -l`
+[ "$numreadonly" != "0" ] && {
+    echo "BAD: readonly delegations were created byt the feature is not activated on the database"
+    exit 1
+}
+
+
+#
+# 4
+#
+
+echo Activating ReadOnly record support for test.tdb ...
+# activate readonly support
+try_command_on_node -q all $CTDB_TEST_WRAPPER ctdb setdbreadonly test.tdb
+numreadonly=`try_command_on_node -v 0 $CTDB_TEST_WRAPPER ctdb getdbmap | grep READONLY | wc -l`
+[ "$numreadonly" != "1" ] && {
+    echo BAD: could not activate readonly support for the test database
+    exit 1
+}
+
+
+
+#
+# 5
+#
+
+echo Create some readonly delegations ...
+# fetch record to node 0 and make it dmaster
+try_command_on_node -q 1 $CTDB_TEST_WRAPPER ctdb_update_record
+
+# fetch readonly to node 1
+try_command_on_node -v 0 $CTDB_TEST_WRAPPER "ctdb_fetch_readonly_once </dev/null"
+
+numreadonly=`try_command_on_node -v all $CTDB_TEST_WRAPPER ctdb cattdb test.tdb | grep RO_HAVE | wc -l`
+[ "$numreadonly" != "2" ] && {
+    echo BAD: could not create readonly delegation
+    exit 1
+}
+
+
+
+
+#
+# 6
+#
+
+echo verify that a fetchlock will revoke the delegations ...
+# fetch record to node 0 and make it dmaster
+try_command_on_node -q 1 $CTDB_TEST_WRAPPER ctdb_update_record
+
+numreadonly=`try_command_on_node -v all $CTDB_TEST_WRAPPER ctdb cattdb test.tdb | grep RO_HAVE | wc -l`
+[ "$numreadonly" != "0" ] && {
+    echo BAD: fetchlock did not revoke delegations
+    exit 1
+}
+
+
+#
+# 7
+#
+
+echo Create some readonly delegations ...
+# fetch record to node 0 and make it dmaster
+try_command_on_node -q 1 $CTDB_TEST_WRAPPER ctdb_update_record
+
+# fetch readonly to node 1
+try_command_on_node -v 0 $CTDB_TEST_WRAPPER "ctdb_fetch_readonly_once </dev/null"
+
+numreadonly=`try_command_on_node -v all $CTDB_TEST_WRAPPER ctdb cattdb test.tdb | grep RO_HAVE | wc -l`
+[ "$numreadonly" != "2" ] && {
+    echo BAD: could not create readonly delegation
+    exit 1
+}
+
+
+
+
+#
+# 8
+#
+
+echo verify that a recovery will revoke the delegations ...
+try_command_on_node -q 0 $CTDB_TEST_WRAPPER ctdb recover
+
+numreadonly=`try_command_on_node -v all $CTDB_TEST_WRAPPER ctdb cattdb test.tdb | grep RO_HAVE | wc -l`
+[ "$numreadonly" != "0" ] && {
+    echo BAD: recovery did not revoke delegations
+    exit 1
+}
+
+echo OK. test completed successfully
+exit 0