| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.ha; |
| |
| import static org.junit.Assert.*; |
| |
| import java.net.InetSocketAddress; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.util.Shell; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| |
| import com.google.common.collect.Lists; |
| |
| public class TestNodeFencer { |
| |
| private HAServiceTarget MOCK_TARGET; |
| |
| // Fencer shell commands that always return true on Unix and Windows |
| // respectively. Lacking the POSIX 'true' command on Windows, we use |
| // the batch command 'rem'. |
| private static String FENCER_TRUE_COMMAND_UNIX = "shell(true)"; |
| private static String FENCER_TRUE_COMMAND_WINDOWS = "shell(rem)"; |
| |
| @Before |
| public void clearMockState() { |
| AlwaysSucceedFencer.fenceCalled = 0; |
| AlwaysSucceedFencer.callArgs.clear(); |
| AlwaysFailFencer.fenceCalled = 0; |
| AlwaysFailFencer.callArgs.clear(); |
| |
| MOCK_TARGET = Mockito.mock(HAServiceTarget.class); |
| Mockito.doReturn("my mock").when(MOCK_TARGET).toString(); |
| Mockito.doReturn(new InetSocketAddress("host", 1234)) |
| .when(MOCK_TARGET).getAddress(); |
| } |
| |
| private static String getFencerTrueCommand() { |
| return Shell.WINDOWS ? |
| FENCER_TRUE_COMMAND_WINDOWS : FENCER_TRUE_COMMAND_UNIX; |
| } |
| |
| @Test |
| public void testSingleFencer() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer( |
| AlwaysSucceedFencer.class.getName() + "(foo)"); |
| assertTrue(fencer.fence(MOCK_TARGET)); |
| assertEquals(1, AlwaysSucceedFencer.fenceCalled); |
| assertSame(MOCK_TARGET, AlwaysSucceedFencer.fencedSvc); |
| assertEquals("foo", AlwaysSucceedFencer.callArgs.get(0)); |
| } |
| |
| @Test |
| public void testMultipleFencers() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer( |
| AlwaysSucceedFencer.class.getName() + "(foo)\n" + |
| AlwaysSucceedFencer.class.getName() + "(bar)\n"); |
| assertTrue(fencer.fence(MOCK_TARGET)); |
| // Only one call, since the first fencer succeeds |
| assertEquals(1, AlwaysSucceedFencer.fenceCalled); |
| assertEquals("foo", AlwaysSucceedFencer.callArgs.get(0)); |
| } |
| |
| @Test |
| public void testWhitespaceAndCommentsInConfig() |
| throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer( |
| "\n" + |
| " # the next one will always fail\n" + |
| " " + AlwaysFailFencer.class.getName() + "(foo) # <- fails\n" + |
| AlwaysSucceedFencer.class.getName() + "(bar) \n"); |
| assertTrue(fencer.fence(MOCK_TARGET)); |
| // One call to each, since top fencer fails |
| assertEquals(1, AlwaysFailFencer.fenceCalled); |
| assertSame(MOCK_TARGET, AlwaysFailFencer.fencedSvc); |
| assertEquals(1, AlwaysSucceedFencer.fenceCalled); |
| assertSame(MOCK_TARGET, AlwaysSucceedFencer.fencedSvc); |
| assertEquals("foo", AlwaysFailFencer.callArgs.get(0)); |
| assertEquals("bar", AlwaysSucceedFencer.callArgs.get(0)); |
| } |
| |
| @Test |
| public void testArglessFencer() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer( |
| AlwaysSucceedFencer.class.getName()); |
| assertTrue(fencer.fence(MOCK_TARGET)); |
| // One call to each, since top fencer fails |
| assertEquals(1, AlwaysSucceedFencer.fenceCalled); |
| assertSame(MOCK_TARGET, AlwaysSucceedFencer.fencedSvc); |
| assertEquals(null, AlwaysSucceedFencer.callArgs.get(0)); |
| } |
| |
| @Test |
| public void testShortNameShell() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer(getFencerTrueCommand()); |
| assertTrue(fencer.fence(MOCK_TARGET)); |
| } |
| |
| @Test |
| public void testShortNameSsh() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer("sshfence"); |
| assertFalse(fencer.fence(MOCK_TARGET)); |
| } |
| |
| @Test |
| public void testShortNameSshWithUser() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer("sshfence(user)"); |
| assertFalse(fencer.fence(MOCK_TARGET)); |
| } |
| |
| @Test |
| public void testShortNameSshWithPort() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer("sshfence(:123)"); |
| assertFalse(fencer.fence(MOCK_TARGET)); |
| } |
| |
| @Test |
| public void testShortNameSshWithUserPort() throws BadFencingConfigurationException { |
| NodeFencer fencer = setupFencer("sshfence(user:123)"); |
| assertFalse(fencer.fence(MOCK_TARGET)); |
| } |
| |
| public static NodeFencer setupFencer(String confStr) |
| throws BadFencingConfigurationException { |
| System.err.println("Testing configuration:\n" + confStr); |
| Configuration conf = new Configuration(); |
| return new NodeFencer(conf, confStr); |
| } |
| |
| /** |
| * Mock fencing method that always returns true |
| */ |
| public static class AlwaysSucceedFencer extends Configured |
| implements FenceMethod { |
| static int fenceCalled = 0; |
| static HAServiceTarget fencedSvc; |
| static List<String> callArgs = Lists.newArrayList(); |
| |
| @Override |
| public boolean tryFence(HAServiceTarget target, String args) { |
| fencedSvc = target; |
| callArgs.add(args); |
| fenceCalled++; |
| return true; |
| } |
| |
| @Override |
| public void checkArgs(String args) { |
| } |
| |
| public static HAServiceTarget getLastFencedService() { |
| return fencedSvc; |
| } |
| } |
| |
| /** |
| * Identical mock to above, except always returns false |
| */ |
| public static class AlwaysFailFencer extends Configured |
| implements FenceMethod { |
| static int fenceCalled = 0; |
| static HAServiceTarget fencedSvc; |
| static List<String> callArgs = Lists.newArrayList(); |
| |
| @Override |
| public boolean tryFence(HAServiceTarget target, String args) { |
| fencedSvc = target; |
| callArgs.add(args); |
| fenceCalled++; |
| return false; |
| } |
| |
| @Override |
| public void checkArgs(String args) { |
| } |
| } |
| } |