ctdb-tests: Add new public IP takeover no-op test

Test with DisableIPFailover=1 and with no public IP addresses
configured.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12254

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Wed Sep 14 12:30:30 CEST 2016 on sn-devel-144

diff --git a/ctdb/tests/simple/19_ip_takeover_noop.sh b/ctdb/tests/simple/19_ip_takeover_noop.sh
new file mode 100755 (executable)
index 0000000..4cfedb0
--- /dev/null
+++ b/ctdb/tests/simple/19_ip_takeover_noop.sh
@@ -0,0 +1,71 @@
+#!/bin/bash
+
+test_info()
+{
+    cat <<EOF
+Check that CTDB operates correctly if:
+
+* DisableIPFailover is set; or
+* there are 0 public IPs configured
+
+This test only does anything with local daemons.  On a real cluster it
+has no way of updating configuration.
+EOF
+}
+
+. "${TEST_SCRIPTS_DIR}/integration.bash"
+
+ctdb_test_init "$@"
+
+set -e
+
+cluster_is_healthy
+
+if [ -z "$TEST_LOCAL_DAEMONS" ] ; then
+       echo "SKIPPING this test - only runs against local daemons"
+       exit 0
+fi
+
+# Reset configuration
+ctdb_restart_when_done
+
+select_test_node_and_ips
+
+echo "Setting DisableIPFailover=1 on all nodes"
+try_command_on_node all $CTDB setvar DisableIPFailover 1
+
+echo "Getting \"before\" IP allocation..."
+try_command_on_node -v any $CTDB ip all
+before="$out"
+
+echo "Disabling node ${test_node}..."
+try_command_on_node "$test_node" $CTDB disable
+wait_until_node_has_status $test_node disabled
+
+echo "Getting \"after\" IP allocation..."
+try_command_on_node -v any $CTDB ip all
+after="$out"
+
+if [ "$before" == "$after" ] ; then
+       echo "GOOD: IP allocation is unchanged"
+       echo
+else
+       die "BAD: IP allocation changed"
+fi
+
+echo "----------------------------------------"
+
+daemons_stop
+
+echo "Starting CTDB with an empty public addresses configuration..."
+CTDB_PUBLIC_ADDRESSES="/dev/null" daemons_start
+
+wait_until_ready
+
+echo "Trying explicit ipreallocate..."
+try_command_on_node any $CTDB ipreallocate
+
+echo "Good, that seems to work!"
+echo
+
+ps_ctdbd